mirror of https://github.com/status-im/consul.git
2748 lines
89 KiB
Go
2748 lines
89 KiB
Go
package xds
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import (
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"errors"
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"fmt"
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"net"
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"net/url"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"time"
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envoy_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
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envoy_listener_v3 "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
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envoy_route_v3 "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
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envoy_grpc_http1_bridge_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/grpc_http1_bridge/v3"
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envoy_grpc_stats_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/grpc_stats/v3"
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envoy_http_router_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/router/v3"
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envoy_extensions_filters_listener_http_inspector_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/listener/http_inspector/v3"
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envoy_original_dst_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/listener/original_dst/v3"
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envoy_tls_inspector_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/listener/tls_inspector/v3"
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envoy_connection_limit_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/connection_limit/v3"
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envoy_http_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
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envoy_sni_cluster_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/sni_cluster/v3"
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envoy_tcp_proxy_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/tcp_proxy/v3"
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envoy_tls_v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/transport_sockets/tls/v3"
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envoy_type_v3 "github.com/envoyproxy/go-control-plane/envoy/type/v3"
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"github.com/hashicorp/go-hclog"
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"google.golang.org/protobuf/encoding/protojson"
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"google.golang.org/protobuf/proto"
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"google.golang.org/protobuf/types/known/anypb"
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"google.golang.org/protobuf/types/known/durationpb"
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"google.golang.org/protobuf/types/known/wrapperspb"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/connect"
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"github.com/hashicorp/consul/agent/proxycfg"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/agent/xds/accesslogs"
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"github.com/hashicorp/consul/envoyextensions/xdscommon"
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"github.com/hashicorp/consul/lib"
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"github.com/hashicorp/consul/lib/stringslice"
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"github.com/hashicorp/consul/proto/pbpeering"
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"github.com/hashicorp/consul/sdk/iptables"
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"github.com/hashicorp/consul/types"
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)
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const virtualIPTag = "virtual"
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// listenersFromSnapshot returns the xDS API representation of the "listeners" in the snapshot.
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func (s *ResourceGenerator) listenersFromSnapshot(cfgSnap *proxycfg.ConfigSnapshot) ([]proto.Message, error) {
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if cfgSnap == nil {
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return nil, errors.New("nil config given")
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}
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switch cfgSnap.Kind {
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case structs.ServiceKindConnectProxy:
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return s.listenersFromSnapshotConnectProxy(cfgSnap)
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case structs.ServiceKindTerminatingGateway,
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structs.ServiceKindMeshGateway,
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structs.ServiceKindIngressGateway,
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structs.ServiceKindAPIGateway:
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return s.listenersFromSnapshotGateway(cfgSnap)
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default:
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return nil, fmt.Errorf("Invalid service kind: %v", cfgSnap.Kind)
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}
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}
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// listenersFromSnapshotConnectProxy returns the "listeners" for a connect proxy service
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func (s *ResourceGenerator) listenersFromSnapshotConnectProxy(cfgSnap *proxycfg.ConfigSnapshot) ([]proto.Message, error) {
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resources := make([]proto.Message, 1)
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var err error
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// Configure inbound listener.
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resources[0], err = s.makeInboundListener(cfgSnap, xdscommon.PublicListenerName)
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if err != nil {
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return nil, err
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}
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// This outboundListener is exclusively used when transparent proxy mode is active.
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// In that situation there is a single listener where we are redirecting outbound traffic,
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// and each upstream gets a filter chain attached to that listener.
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var outboundListener *envoy_listener_v3.Listener
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if cfgSnap.Proxy.Mode == structs.ProxyModeTransparent {
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port := iptables.DefaultTProxyOutboundPort
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if cfgSnap.Proxy.TransparentProxy.OutboundListenerPort != 0 {
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port = cfgSnap.Proxy.TransparentProxy.OutboundListenerPort
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}
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originalDstFilter, err := makeEnvoyListenerFilter("envoy.filters.listener.original_dst", &envoy_original_dst_v3.OriginalDst{})
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if err != nil {
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return nil, err
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}
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opts := makeListenerOpts{
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name: xdscommon.OutboundListenerName,
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accessLogs: cfgSnap.Proxy.AccessLogs,
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addr: "127.0.0.1",
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port: port,
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direction: envoy_core_v3.TrafficDirection_OUTBOUND,
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logger: s.Logger,
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}
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outboundListener = makeListener(opts)
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outboundListener.FilterChains = make([]*envoy_listener_v3.FilterChain, 0)
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outboundListener.ListenerFilters = []*envoy_listener_v3.ListenerFilter{
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// The original_dst filter is a listener filter that recovers the original destination
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// address before the iptables redirection. This filter is needed for transparent
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// proxies because they route to upstreams using filter chains that match on the
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// destination IP address. If the filter is not present, no chain will match.
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originalDstFilter,
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}
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}
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proxyCfg, err := ParseProxyConfig(cfgSnap.Proxy.Config)
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if err != nil {
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// Don't hard fail on a config typo, just warn. The parse func returns
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// default config if there is an error so it's safe to continue.
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s.Logger.Warn("failed to parse Connect.Proxy.Config", "error", err)
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}
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var tracing *envoy_http_v3.HttpConnectionManager_Tracing
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if proxyCfg.ListenerTracingJSON != "" {
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if tracing, err = makeTracingFromUserConfig(proxyCfg.ListenerTracingJSON); err != nil {
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s.Logger.Warn("failed to parse ListenerTracingJSON config", "error", err)
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}
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}
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upstreamsSnapshot, err := cfgSnap.ToConfigSnapshotUpstreams()
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if err != nil {
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return nil, err
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}
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for uid, chain := range cfgSnap.ConnectProxy.DiscoveryChain {
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upstreamCfg, skip := cfgSnap.ConnectProxy.GetUpstream(uid, &cfgSnap.ProxyID.EnterpriseMeta)
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if skip {
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// Discovery chain is not associated with a known explicit or implicit upstream so it is skipped.
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continue
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}
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cfg := s.getAndModifyUpstreamConfigForListener(uid, upstreamCfg, chain)
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// If escape hatch is present, create a listener from it and move on to the next
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if cfg.EnvoyListenerJSON != "" {
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upstreamListener, err := makeListenerFromUserConfig(cfg.EnvoyListenerJSON)
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if err != nil {
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return nil, err
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}
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resources = append(resources, upstreamListener)
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continue
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}
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// RDS, Envoy's Route Discovery Service, is only used for HTTP services with a customized discovery chain.
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useRDS := chain.Protocol != "tcp" && !chain.Default
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var targetClusterData targetClusterData
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if !useRDS {
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// When not using RDS we must generate a cluster name to attach to the filter chain.
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// With RDS, cluster names get attached to the dynamic routes instead.
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target, err := simpleChainTarget(chain)
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if err != nil {
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return nil, err
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}
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td, ok := s.getTargetClusterData(upstreamsSnapshot, chain, target.ID, false, false)
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if !ok {
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continue
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}
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targetClusterData = td
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}
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filterName := fmt.Sprintf("%s.%s.%s.%s", chain.ServiceName, chain.Namespace, chain.Partition, chain.Datacenter)
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// Generate the upstream listeners for when they are explicitly set with a local bind port or socket path
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if upstreamCfg != nil && upstreamCfg.HasLocalPortOrSocket() {
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filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
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accessLogs: &cfgSnap.Proxy.AccessLogs,
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routeName: uid.EnvoyID(),
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clusterName: targetClusterData.clusterName,
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filterName: filterName,
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protocol: cfg.Protocol,
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useRDS: useRDS,
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tracing: tracing,
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})
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if err != nil {
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return nil, err
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}
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opts := makeListenerOpts{
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name: uid.EnvoyID(),
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accessLogs: cfgSnap.Proxy.AccessLogs,
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direction: envoy_core_v3.TrafficDirection_OUTBOUND,
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logger: s.Logger,
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upstream: upstreamCfg,
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}
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upstreamListener := makeListener(opts)
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s.injectConnectionBalanceConfig(cfg.BalanceOutboundConnections, upstreamListener)
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upstreamListener.FilterChains = []*envoy_listener_v3.FilterChain{
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filterChain,
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}
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resources = append(resources, upstreamListener)
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// Avoid creating filter chains below for upstreams that have dedicated listeners
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continue
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}
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// The rest of this loop is used exclusively for transparent proxies.
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// Below we create a filter chain per upstream, rather than a listener per upstream
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// as we do for explicit upstreams above.
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filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
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accessLogs: &cfgSnap.Proxy.AccessLogs,
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routeName: uid.EnvoyID(),
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clusterName: targetClusterData.clusterName,
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filterName: filterName,
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protocol: cfg.Protocol,
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useRDS: useRDS,
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tracing: tracing,
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})
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if err != nil {
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return nil, err
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}
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endpoints := cfgSnap.ConnectProxy.WatchedUpstreamEndpoints[uid][chain.ID()]
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uniqueAddrs := make(map[string]struct{})
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// Match on the virtual IP for the upstream service (identified by the chain's ID).
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// We do not match on all endpoints here since it would lead to load balancing across
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// all instances when any instance address is dialed.
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for _, e := range endpoints {
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if e.Service.Kind == structs.ServiceKind(structs.TerminatingGateway) {
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key := structs.ServiceGatewayVirtualIPTag(chain.CompoundServiceName())
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if vip := e.Service.TaggedAddresses[key]; vip.Address != "" {
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uniqueAddrs[vip.Address] = struct{}{}
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}
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continue
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}
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if vip := e.Service.TaggedAddresses[structs.TaggedAddressVirtualIP]; vip.Address != "" {
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uniqueAddrs[vip.Address] = struct{}{}
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}
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// The virtualIPTag is used by consul-k8s to store the ClusterIP for a service.
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// We only match on this virtual IP if the upstream is in the proxy's partition.
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// This is because the IP is not guaranteed to be unique across k8s clusters.
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if acl.EqualPartitions(e.Node.PartitionOrDefault(), cfgSnap.ProxyID.PartitionOrDefault()) {
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if vip := e.Service.TaggedAddresses[virtualIPTag]; vip.Address != "" {
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uniqueAddrs[vip.Address] = struct{}{}
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}
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}
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}
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if len(uniqueAddrs) > 2 {
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s.Logger.Debug("detected multiple virtual IPs for an upstream, all will be used to match traffic",
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"upstream", uid, "ip_count", len(uniqueAddrs))
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}
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// For every potential address we collected, create the appropriate address prefix to match on.
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// In this case we are matching on exact addresses, so the prefix is the address itself,
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// and the prefix length is based on whether it's IPv4 or IPv6.
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filterChain.FilterChainMatch = makeFilterChainMatchFromAddrs(uniqueAddrs)
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// Only attach the filter chain if there are addresses to match on
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if filterChain.FilterChainMatch != nil && len(filterChain.FilterChainMatch.PrefixRanges) > 0 {
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outboundListener.FilterChains = append(outboundListener.FilterChains, filterChain)
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}
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}
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requiresTLSInspector := false
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requiresHTTPInspector := false
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configuredPorts := make(map[int]interface{})
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err = cfgSnap.ConnectProxy.DestinationsUpstream.ForEachKeyE(func(uid proxycfg.UpstreamID) error {
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svcConfig, ok := cfgSnap.ConnectProxy.DestinationsUpstream.Get(uid)
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if !ok || svcConfig == nil {
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return nil
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}
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if structs.IsProtocolHTTPLike(svcConfig.Protocol) {
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if _, ok := configuredPorts[svcConfig.Destination.Port]; ok {
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return nil
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}
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configuredPorts[svcConfig.Destination.Port] = struct{}{}
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const name = "~http" // name used for the shared route name
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routeName := clusterNameForDestination(cfgSnap, name, fmt.Sprintf("%d", svcConfig.Destination.Port), svcConfig.NamespaceOrDefault(), svcConfig.PartitionOrDefault())
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filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
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accessLogs: &cfgSnap.Proxy.AccessLogs,
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routeName: routeName,
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filterName: routeName,
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protocol: svcConfig.Protocol,
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useRDS: true,
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tracing: tracing,
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})
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if err != nil {
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return err
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}
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filterChain.FilterChainMatch = makeFilterChainMatchFromAddressWithPort("", svcConfig.Destination.Port)
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outboundListener.FilterChains = append(outboundListener.FilterChains, filterChain)
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requiresHTTPInspector = true
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} else {
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for _, address := range svcConfig.Destination.Addresses {
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clusterName := clusterNameForDestination(cfgSnap, uid.Name, address, uid.NamespaceOrDefault(), uid.PartitionOrDefault())
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filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
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accessLogs: &cfgSnap.Proxy.AccessLogs,
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routeName: uid.EnvoyID(),
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clusterName: clusterName,
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filterName: clusterName,
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protocol: svcConfig.Protocol,
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tracing: tracing,
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})
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if err != nil {
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return err
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}
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filterChain.FilterChainMatch = makeFilterChainMatchFromAddressWithPort(address, svcConfig.Destination.Port)
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outboundListener.FilterChains = append(outboundListener.FilterChains, filterChain)
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requiresTLSInspector = len(filterChain.FilterChainMatch.ServerNames) != 0 || requiresTLSInspector
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}
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}
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return nil
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})
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if err != nil {
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return nil, err
|
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}
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if requiresTLSInspector {
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tlsInspector, err := makeTLSInspectorListenerFilter()
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if err != nil {
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return nil, err
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}
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outboundListener.ListenerFilters = append(outboundListener.ListenerFilters, tlsInspector)
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}
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if requiresHTTPInspector {
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httpInspector, err := makeHTTPInspectorListenerFilter()
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if err != nil {
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return nil, err
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}
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outboundListener.ListenerFilters = append(outboundListener.ListenerFilters, httpInspector)
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}
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// Looping over explicit and implicit upstreams is only needed for cross-peer
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// because they do not have discovery chains.
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for _, uid := range cfgSnap.ConnectProxy.PeeredUpstreamIDs() {
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upstreamCfg, skip := cfgSnap.ConnectProxy.GetUpstream(uid, &cfgSnap.ProxyID.EnterpriseMeta)
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if skip {
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// Not associated with a known explicit or implicit upstream so it is skipped.
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continue
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}
|
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|
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peerMeta, found := cfgSnap.ConnectProxy.UpstreamPeerMeta(uid)
|
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if !found {
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s.Logger.Warn("failed to fetch upstream peering metadata for listener", "uid", uid)
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}
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cfg := s.getAndModifyUpstreamConfigForPeeredListener(uid, upstreamCfg, peerMeta)
|
|
|
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// If escape hatch is present, create a listener from it and move on to the next
|
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if cfg.EnvoyListenerJSON != "" {
|
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upstreamListener, err := makeListenerFromUserConfig(cfg.EnvoyListenerJSON)
|
|
if err != nil {
|
|
s.Logger.Error("failed to parse envoy_listener_json",
|
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"upstream", uid,
|
|
"error", err)
|
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continue
|
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}
|
|
resources = append(resources, upstreamListener)
|
|
continue
|
|
}
|
|
|
|
tbs, ok := cfgSnap.ConnectProxy.UpstreamPeerTrustBundles.Get(uid.Peer)
|
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if !ok {
|
|
// this should never happen since we loop through upstreams with
|
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// set trust bundles
|
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return nil, fmt.Errorf("trust bundle not ready for peer %s", uid.Peer)
|
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}
|
|
|
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clusterName := generatePeeredClusterName(uid, tbs)
|
|
|
|
// Generate the upstream listeners for when they are explicitly set with a local bind port or socket path
|
|
if upstreamCfg != nil && upstreamCfg.HasLocalPortOrSocket() {
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
clusterName: clusterName,
|
|
filterName: fmt.Sprintf("%s.%s.%s",
|
|
upstreamCfg.DestinationName,
|
|
upstreamCfg.DestinationNamespace,
|
|
upstreamCfg.DestinationPeer),
|
|
routeName: uid.EnvoyID(),
|
|
protocol: cfg.Protocol,
|
|
useRDS: false,
|
|
statPrefix: "upstream_peered.",
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
opts := makeListenerOpts{
|
|
name: uid.EnvoyID(),
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
direction: envoy_core_v3.TrafficDirection_OUTBOUND,
|
|
logger: s.Logger,
|
|
upstream: upstreamCfg,
|
|
}
|
|
upstreamListener := makeListener(opts)
|
|
s.injectConnectionBalanceConfig(cfg.BalanceOutboundConnections, upstreamListener)
|
|
|
|
upstreamListener.FilterChains = []*envoy_listener_v3.FilterChain{
|
|
filterChain,
|
|
}
|
|
resources = append(resources, upstreamListener)
|
|
|
|
// Avoid creating filter chains below for upstreams that have dedicated listeners
|
|
continue
|
|
}
|
|
|
|
// The rest of this loop is used exclusively for transparent proxies.
|
|
// Below we create a filter chain per upstream, rather than a listener per upstream
|
|
// as we do for explicit upstreams above.
|
|
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
routeName: uid.EnvoyID(),
|
|
clusterName: clusterName,
|
|
filterName: fmt.Sprintf("%s.%s.%s",
|
|
uid.Name,
|
|
uid.NamespaceOrDefault(),
|
|
uid.Peer),
|
|
protocol: cfg.Protocol,
|
|
useRDS: false,
|
|
statPrefix: "upstream_peered.",
|
|
tracing: tracing,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
endpoints, _ := cfgSnap.ConnectProxy.PeerUpstreamEndpoints.Get(uid)
|
|
uniqueAddrs := make(map[string]struct{})
|
|
|
|
// Match on the virtual IP for the upstream service (identified by the chain's ID).
|
|
// We do not match on all endpoints here since it would lead to load balancing across
|
|
// all instances when any instance address is dialed.
|
|
for _, e := range endpoints {
|
|
if vip := e.Service.TaggedAddresses[structs.TaggedAddressVirtualIP]; vip.Address != "" {
|
|
uniqueAddrs[vip.Address] = struct{}{}
|
|
}
|
|
|
|
// The virtualIPTag is used by consul-k8s to store the ClusterIP for a service.
|
|
// For services imported from a peer,the partition will be equal in all cases.
|
|
if acl.EqualPartitions(e.Node.PartitionOrDefault(), cfgSnap.ProxyID.PartitionOrDefault()) {
|
|
if vip := e.Service.TaggedAddresses[virtualIPTag]; vip.Address != "" {
|
|
uniqueAddrs[vip.Address] = struct{}{}
|
|
}
|
|
}
|
|
}
|
|
if len(uniqueAddrs) > 2 {
|
|
s.Logger.Debug("detected multiple virtual IPs for an upstream, all will be used to match traffic",
|
|
"upstream", uid, "ip_count", len(uniqueAddrs))
|
|
}
|
|
|
|
// For every potential address we collected, create the appropriate address prefix to match on.
|
|
// In this case we are matching on exact addresses, so the prefix is the address itself,
|
|
// and the prefix length is based on whether it's IPv4 or IPv6.
|
|
filterChain.FilterChainMatch = makeFilterChainMatchFromAddrs(uniqueAddrs)
|
|
|
|
// Only attach the filter chain if there are addresses to match on
|
|
if filterChain.FilterChainMatch != nil && len(filterChain.FilterChainMatch.PrefixRanges) > 0 {
|
|
outboundListener.FilterChains = append(outboundListener.FilterChains, filterChain)
|
|
}
|
|
|
|
}
|
|
|
|
if outboundListener != nil {
|
|
// Add a passthrough for every mesh endpoint that can be dialed directly,
|
|
// as opposed to via a virtual IP.
|
|
var passthroughChains []*envoy_listener_v3.FilterChain
|
|
|
|
for _, targets := range cfgSnap.ConnectProxy.PassthroughUpstreams {
|
|
for tid, addrs := range targets {
|
|
uid := proxycfg.NewUpstreamIDFromTargetID(tid)
|
|
|
|
sni := connect.ServiceSNI(
|
|
uid.Name, "", uid.NamespaceOrDefault(), uid.PartitionOrDefault(), cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain)
|
|
|
|
filterName := fmt.Sprintf("%s.%s.%s.%s", uid.Name, uid.NamespaceOrDefault(), uid.PartitionOrDefault(), cfgSnap.Datacenter)
|
|
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
clusterName: "passthrough~" + sni,
|
|
filterName: filterName,
|
|
protocol: "tcp",
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
filterChain.FilterChainMatch = makeFilterChainMatchFromAddrs(addrs)
|
|
|
|
passthroughChains = append(passthroughChains, filterChain)
|
|
}
|
|
}
|
|
|
|
outboundListener.FilterChains = append(outboundListener.FilterChains, passthroughChains...)
|
|
|
|
// Filter chains are stable sorted to avoid draining if the list is provided out of order
|
|
sort.SliceStable(outboundListener.FilterChains, func(i, j int) bool {
|
|
si := ""
|
|
sj := ""
|
|
if len(outboundListener.FilterChains[i].FilterChainMatch.PrefixRanges) > 0 {
|
|
si += outboundListener.FilterChains[i].FilterChainMatch.PrefixRanges[0].AddressPrefix +
|
|
"/" + outboundListener.FilterChains[i].FilterChainMatch.PrefixRanges[0].PrefixLen.String() +
|
|
":" + outboundListener.FilterChains[i].FilterChainMatch.DestinationPort.String()
|
|
}
|
|
if len(outboundListener.FilterChains[i].FilterChainMatch.ServerNames) > 0 {
|
|
si += outboundListener.FilterChains[i].FilterChainMatch.ServerNames[0] +
|
|
":" + outboundListener.FilterChains[i].FilterChainMatch.DestinationPort.String()
|
|
} else {
|
|
si += outboundListener.FilterChains[i].FilterChainMatch.DestinationPort.String()
|
|
}
|
|
|
|
if len(outboundListener.FilterChains[j].FilterChainMatch.PrefixRanges) > 0 {
|
|
sj += outboundListener.FilterChains[j].FilterChainMatch.PrefixRanges[0].AddressPrefix +
|
|
"/" + outboundListener.FilterChains[j].FilterChainMatch.PrefixRanges[0].PrefixLen.String() +
|
|
":" + outboundListener.FilterChains[j].FilterChainMatch.DestinationPort.String()
|
|
}
|
|
if len(outboundListener.FilterChains[j].FilterChainMatch.ServerNames) > 0 {
|
|
sj += outboundListener.FilterChains[j].FilterChainMatch.ServerNames[0] +
|
|
":" + outboundListener.FilterChains[j].FilterChainMatch.DestinationPort.String()
|
|
} else {
|
|
sj += outboundListener.FilterChains[j].FilterChainMatch.DestinationPort.String()
|
|
}
|
|
|
|
return si < sj
|
|
})
|
|
|
|
// Add a catch-all filter chain that acts as a TCP proxy to destinations outside the mesh
|
|
if meshConf := cfgSnap.MeshConfig(); meshConf == nil ||
|
|
!meshConf.TransparentProxy.MeshDestinationsOnly {
|
|
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
clusterName: OriginalDestinationClusterName,
|
|
filterName: OriginalDestinationClusterName,
|
|
protocol: "tcp",
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
outboundListener.DefaultFilterChain = filterChain
|
|
}
|
|
|
|
// Only add the outbound listener if configured.
|
|
if len(outboundListener.FilterChains) > 0 || outboundListener.DefaultFilterChain != nil {
|
|
resources = append(resources, outboundListener)
|
|
}
|
|
}
|
|
|
|
// Looping over explicit upstreams is only needed for prepared queries because they do not have discovery chains
|
|
for uid, u := range cfgSnap.ConnectProxy.UpstreamConfig {
|
|
if u.DestinationType != structs.UpstreamDestTypePreparedQuery {
|
|
continue
|
|
}
|
|
|
|
cfg, err := structs.ParseUpstreamConfig(u.Config)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse", "upstream", uid, "error", err)
|
|
}
|
|
|
|
// If escape hatch is present, create a listener from it and move on to the next
|
|
if cfg.EnvoyListenerJSON != "" {
|
|
upstreamListener, err := makeListenerFromUserConfig(cfg.EnvoyListenerJSON)
|
|
if err != nil {
|
|
s.Logger.Error("failed to parse envoy_listener_json",
|
|
"upstream", uid,
|
|
"error", err)
|
|
continue
|
|
}
|
|
resources = append(resources, upstreamListener)
|
|
continue
|
|
}
|
|
|
|
opts := makeListenerOpts{
|
|
name: uid.EnvoyID(),
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
direction: envoy_core_v3.TrafficDirection_OUTBOUND,
|
|
logger: s.Logger,
|
|
upstream: u,
|
|
}
|
|
upstreamListener := makeListener(opts)
|
|
s.injectConnectionBalanceConfig(cfg.BalanceOutboundConnections, upstreamListener)
|
|
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
// TODO (SNI partition) add partition for upstream SNI
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
clusterName: connect.UpstreamSNI(u, "", cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain),
|
|
filterName: uid.EnvoyID(),
|
|
routeName: uid.EnvoyID(),
|
|
protocol: cfg.Protocol,
|
|
tracing: tracing,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
upstreamListener.FilterChains = []*envoy_listener_v3.FilterChain{
|
|
filterChain,
|
|
}
|
|
resources = append(resources, upstreamListener)
|
|
}
|
|
|
|
cfgSnap.Proxy.Expose.Finalize()
|
|
paths := cfgSnap.Proxy.Expose.Paths
|
|
|
|
// Add service health checks to the list of paths to create listeners for if needed
|
|
if cfgSnap.Proxy.Expose.Checks {
|
|
psid := structs.NewServiceID(cfgSnap.Proxy.DestinationServiceID, &cfgSnap.ProxyID.EnterpriseMeta)
|
|
for _, check := range cfgSnap.ConnectProxy.WatchedServiceChecks[psid] {
|
|
p, err := parseCheckPath(check)
|
|
if err != nil {
|
|
s.Logger.Warn("failed to create listener for", "check", check.CheckID, "error", err)
|
|
continue
|
|
}
|
|
paths = append(paths, p)
|
|
}
|
|
}
|
|
|
|
// Configure additional listener for exposed check paths
|
|
for _, path := range paths {
|
|
clusterName := xdscommon.LocalAppClusterName
|
|
if path.LocalPathPort != cfgSnap.Proxy.LocalServicePort {
|
|
clusterName = makeExposeClusterName(path.LocalPathPort)
|
|
}
|
|
|
|
l, err := s.makeExposedCheckListener(cfgSnap, clusterName, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resources = append(resources, l)
|
|
}
|
|
|
|
return resources, nil
|
|
}
|
|
|
|
func makeFilterChainMatchFromAddrs(addrs map[string]struct{}) *envoy_listener_v3.FilterChainMatch {
|
|
ranges := make([]*envoy_core_v3.CidrRange, 0)
|
|
|
|
for addr := range addrs {
|
|
ip := net.ParseIP(addr)
|
|
if ip == nil {
|
|
continue
|
|
}
|
|
|
|
pfxLen := uint32(32)
|
|
if ip.To4() == nil {
|
|
pfxLen = 128
|
|
}
|
|
ranges = append(ranges, &envoy_core_v3.CidrRange{
|
|
AddressPrefix: addr,
|
|
PrefixLen: &wrapperspb.UInt32Value{Value: pfxLen},
|
|
})
|
|
}
|
|
|
|
// The match rules are stable sorted to avoid draining if the list is provided out of order
|
|
sort.SliceStable(ranges, func(i, j int) bool {
|
|
return ranges[i].AddressPrefix < ranges[j].AddressPrefix
|
|
})
|
|
|
|
return &envoy_listener_v3.FilterChainMatch{
|
|
PrefixRanges: ranges,
|
|
}
|
|
}
|
|
|
|
func makeFilterChainMatchFromAddressWithPort(address string, port int) *envoy_listener_v3.FilterChainMatch {
|
|
ranges := make([]*envoy_core_v3.CidrRange, 0)
|
|
|
|
ip := net.ParseIP(address)
|
|
if ip == nil {
|
|
if address != "" {
|
|
return &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: []string{address},
|
|
DestinationPort: &wrapperspb.UInt32Value{Value: uint32(port)},
|
|
}
|
|
}
|
|
return &envoy_listener_v3.FilterChainMatch{
|
|
DestinationPort: &wrapperspb.UInt32Value{Value: uint32(port)},
|
|
}
|
|
}
|
|
|
|
pfxLen := uint32(32)
|
|
if ip.To4() == nil {
|
|
pfxLen = 128
|
|
}
|
|
ranges = append(ranges, &envoy_core_v3.CidrRange{
|
|
AddressPrefix: address,
|
|
PrefixLen: &wrapperspb.UInt32Value{Value: pfxLen},
|
|
})
|
|
|
|
return &envoy_listener_v3.FilterChainMatch{
|
|
PrefixRanges: ranges,
|
|
DestinationPort: &wrapperspb.UInt32Value{Value: uint32(port)},
|
|
}
|
|
}
|
|
|
|
func parseCheckPath(check structs.CheckType) (structs.ExposePath, error) {
|
|
var path structs.ExposePath
|
|
|
|
if check.HTTP != "" {
|
|
path.Protocol = "http"
|
|
|
|
// Get path and local port from original HTTP target
|
|
u, err := url.Parse(check.HTTP)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse url '%s': %v", check.HTTP, err)
|
|
}
|
|
path.Path = u.Path
|
|
|
|
_, portStr, err := net.SplitHostPort(u.Host)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.HTTP, err)
|
|
}
|
|
path.LocalPathPort, err = strconv.Atoi(portStr)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.HTTP, err)
|
|
}
|
|
|
|
// Get listener port from proxied HTTP target
|
|
u, err = url.Parse(check.ProxyHTTP)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse url '%s': %v", check.ProxyHTTP, err)
|
|
}
|
|
|
|
_, portStr, err = net.SplitHostPort(u.Host)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.ProxyHTTP, err)
|
|
}
|
|
path.ListenerPort, err = strconv.Atoi(portStr)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.ProxyHTTP, err)
|
|
}
|
|
}
|
|
|
|
if check.GRPC != "" {
|
|
path.Path = "/grpc.health.v1.Health/Check"
|
|
path.Protocol = "http2"
|
|
|
|
// Get local port from original GRPC target of the form: host/service
|
|
proxyServerAndService := strings.SplitN(check.GRPC, "/", 2)
|
|
_, portStr, err := net.SplitHostPort(proxyServerAndService[0])
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to split host/port from '%s': %v", check.GRPC, err)
|
|
}
|
|
path.LocalPathPort, err = strconv.Atoi(portStr)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.GRPC, err)
|
|
}
|
|
|
|
// Get listener port from proxied GRPC target of the form: host/service
|
|
proxyServerAndService = strings.SplitN(check.ProxyGRPC, "/", 2)
|
|
_, portStr, err = net.SplitHostPort(proxyServerAndService[0])
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to split host/port from '%s': %v", check.ProxyGRPC, err)
|
|
}
|
|
path.ListenerPort, err = strconv.Atoi(portStr)
|
|
if err != nil {
|
|
return path, fmt.Errorf("failed to parse port from '%s': %v", check.ProxyGRPC, err)
|
|
}
|
|
}
|
|
|
|
path.ParsedFromCheck = true
|
|
|
|
return path, nil
|
|
}
|
|
|
|
// listenersFromSnapshotGateway returns the "listener" for a terminating-gateway or mesh-gateway service
|
|
func (s *ResourceGenerator) listenersFromSnapshotGateway(cfgSnap *proxycfg.ConfigSnapshot) ([]proto.Message, error) {
|
|
cfg, err := ParseGatewayConfig(cfgSnap.Proxy.Config)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse Connect.Proxy.Config", "error", err)
|
|
}
|
|
|
|
// We'll collect all of the desired listeners first, and deduplicate them later.
|
|
type namedAddress struct {
|
|
name string
|
|
structs.ServiceAddress
|
|
}
|
|
addrs := make([]namedAddress, 0)
|
|
|
|
var resources []proto.Message
|
|
if !cfg.NoDefaultBind {
|
|
addr := cfgSnap.Address
|
|
if addr == "" {
|
|
addr = "0.0.0.0"
|
|
}
|
|
|
|
a := structs.ServiceAddress{
|
|
Address: addr,
|
|
Port: cfgSnap.Port,
|
|
}
|
|
addrs = append(addrs, namedAddress{name: "default", ServiceAddress: a})
|
|
}
|
|
|
|
if cfg.BindTaggedAddresses {
|
|
for name, addrCfg := range cfgSnap.TaggedAddresses {
|
|
a := structs.ServiceAddress{
|
|
Address: addrCfg.Address,
|
|
Port: addrCfg.Port,
|
|
}
|
|
addrs = append(addrs, namedAddress{name: name, ServiceAddress: a})
|
|
}
|
|
}
|
|
|
|
for name, addrCfg := range cfg.BindAddresses {
|
|
a := structs.ServiceAddress{
|
|
Address: addrCfg.Address,
|
|
Port: addrCfg.Port,
|
|
}
|
|
addrs = append(addrs, namedAddress{name: name, ServiceAddress: a})
|
|
}
|
|
|
|
// Prevent invalid configurations of binding to the same port/addr twice
|
|
// including with the any addresses
|
|
//
|
|
// Sort the list and then if two items share a service address, take the
|
|
// first one to ensure we generate one listener per address and it's
|
|
// stable.
|
|
sort.Slice(addrs, func(i, j int) bool {
|
|
return addrs[i].name < addrs[j].name
|
|
})
|
|
|
|
// Make listeners and deduplicate on the fly.
|
|
seen := make(map[structs.ServiceAddress]bool)
|
|
for _, a := range addrs {
|
|
if seen[a.ServiceAddress] {
|
|
continue
|
|
}
|
|
seen[a.ServiceAddress] = true
|
|
|
|
var l *envoy_listener_v3.Listener
|
|
|
|
switch cfgSnap.Kind {
|
|
case structs.ServiceKindTerminatingGateway:
|
|
l, err = s.makeTerminatingGatewayListener(cfgSnap, a.name, a.Address, a.Port)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
case structs.ServiceKindAPIGateway:
|
|
// TODO Find a cleaner solution, can't currently pass unexported property types
|
|
var err error
|
|
cfgSnap.IngressGateway, err = cfgSnap.APIGateway.ToIngress(cfgSnap.Datacenter)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
listeners, err := s.makeIngressGatewayListeners(a.Address, cfgSnap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resources = append(resources, listeners...)
|
|
case structs.ServiceKindIngressGateway:
|
|
listeners, err := s.makeIngressGatewayListeners(a.Address, cfgSnap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resources = append(resources, listeners...)
|
|
case structs.ServiceKindMeshGateway:
|
|
l, err = s.makeMeshGatewayListener(a.name, a.Address, a.Port, cfgSnap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if l != nil {
|
|
resources = append(resources, l)
|
|
}
|
|
}
|
|
return resources, err
|
|
}
|
|
|
|
// makeListener returns a listener with name and bind details set. Filters must
|
|
// be added before it's useful.
|
|
//
|
|
// Note on names: Envoy listeners attempt graceful transitions of connections
|
|
// when their config changes but that means they can't have their bind address
|
|
// or port changed in a running instance. Since our users might choose to change
|
|
// a bind address or port for the public or upstream listeners, we need to
|
|
// encode those into the unique name for the listener such that if the user
|
|
// changes them, we actually create a whole new listener on the new address and
|
|
// port. Envoy should take care of closing the old one once it sees it's no
|
|
// longer in the config.
|
|
type makeListenerOpts struct {
|
|
addr string
|
|
accessLogs structs.AccessLogsConfig
|
|
logger hclog.Logger
|
|
mode string
|
|
name string
|
|
path string
|
|
port int
|
|
direction envoy_core_v3.TrafficDirection
|
|
upstream *structs.Upstream
|
|
}
|
|
|
|
func makeListener(opts makeListenerOpts) *envoy_listener_v3.Listener {
|
|
if opts.upstream != nil && opts.upstream.LocalBindPort == 0 && opts.upstream.LocalBindSocketPath != "" {
|
|
opts.path = opts.upstream.LocalBindSocketPath
|
|
opts.mode = opts.upstream.LocalBindSocketMode
|
|
return makePipeListener(opts)
|
|
}
|
|
if opts.upstream != nil {
|
|
opts.port = opts.upstream.LocalBindPort
|
|
opts.addr = opts.upstream.LocalBindAddress
|
|
return makeListenerWithDefault(opts)
|
|
}
|
|
|
|
return makeListenerWithDefault(opts)
|
|
}
|
|
|
|
func makeListenerWithDefault(opts makeListenerOpts) *envoy_listener_v3.Listener {
|
|
if opts.addr == "" {
|
|
opts.addr = "127.0.0.1"
|
|
}
|
|
accessLog, err := accesslogs.MakeAccessLogs(&opts.accessLogs, true)
|
|
if err != nil && opts.logger != nil {
|
|
// Since access logging is non-essential for routing, warn and move on
|
|
opts.logger.Warn("error generating access log xds", err)
|
|
}
|
|
return &envoy_listener_v3.Listener{
|
|
Name: fmt.Sprintf("%s:%s:%d", opts.name, opts.addr, opts.port),
|
|
AccessLog: accessLog,
|
|
Address: makeAddress(opts.addr, opts.port),
|
|
TrafficDirection: opts.direction,
|
|
}
|
|
}
|
|
|
|
func makePipeListener(opts makeListenerOpts) *envoy_listener_v3.Listener {
|
|
// We've already validated this, so it should not fail.
|
|
modeInt, err := strconv.ParseUint(opts.mode, 0, 32)
|
|
if err != nil {
|
|
modeInt = 0
|
|
}
|
|
accessLog, err := accesslogs.MakeAccessLogs(&opts.accessLogs, true)
|
|
if err != nil && opts.logger != nil {
|
|
// Since access logging is non-essential for routing, warn and move on
|
|
opts.logger.Warn("error generating access log xds", err)
|
|
}
|
|
return &envoy_listener_v3.Listener{
|
|
Name: fmt.Sprintf("%s:%s", opts.name, opts.path),
|
|
AccessLog: accessLog,
|
|
Address: makePipeAddress(opts.path, uint32(modeInt)),
|
|
TrafficDirection: opts.direction,
|
|
}
|
|
}
|
|
|
|
// makeListenerFromUserConfig returns the listener config decoded from an
|
|
// arbitrary proto3 json format string or an error if it's invalid.
|
|
//
|
|
// For now we only support embedding in JSON strings because of the hcl parsing
|
|
// pain (see Background section in the comment for decode.HookWeakDecodeFromSlice).
|
|
// This may be fixed in decode.HookWeakDecodeFromSlice in the future.
|
|
//
|
|
// When we do that we can support just nesting the config directly into the
|
|
// JSON/hcl naturally but this is a stop-gap that gets us an escape hatch
|
|
// immediately. It's also probably not a bad thing to support long-term since
|
|
// any config generated by other systems will likely be in canonical protobuf
|
|
// from rather than our slight variant in JSON/hcl.
|
|
func makeListenerFromUserConfig(configJSON string) (*envoy_listener_v3.Listener, error) {
|
|
// Type field is present so decode it as a anypb.Any
|
|
var any anypb.Any
|
|
if err := protojson.Unmarshal([]byte(configJSON), &any); err != nil {
|
|
return nil, err
|
|
}
|
|
var l envoy_listener_v3.Listener
|
|
if err := proto.Unmarshal(any.Value, &l); err != nil {
|
|
return nil, err
|
|
}
|
|
return &l, nil
|
|
}
|
|
|
|
func (s *ResourceGenerator) injectConnectionBalanceConfig(balanceType string, listener *envoy_listener_v3.Listener) {
|
|
switch balanceType {
|
|
case "":
|
|
// Default with no balancing.
|
|
case structs.ConnectionExactBalance:
|
|
listener.ConnectionBalanceConfig = &envoy_listener_v3.Listener_ConnectionBalanceConfig{
|
|
BalanceType: &envoy_listener_v3.Listener_ConnectionBalanceConfig_ExactBalance_{},
|
|
}
|
|
default:
|
|
s.Logger.Warn("ignoring invalid connection balance option", "value", balanceType)
|
|
}
|
|
}
|
|
|
|
// Ensure that the first filter in each filter chain of a public listener is
|
|
// the authz filter to prevent unauthorized access.
|
|
func (s *ResourceGenerator) injectConnectFilters(cfgSnap *proxycfg.ConfigSnapshot, listener *envoy_listener_v3.Listener) error {
|
|
authzFilter, err := makeRBACNetworkFilter(
|
|
cfgSnap.ConnectProxy.Intentions,
|
|
cfgSnap.IntentionDefaultAllow,
|
|
rbacLocalInfo{
|
|
trustDomain: cfgSnap.Roots.TrustDomain,
|
|
datacenter: cfgSnap.Datacenter,
|
|
partition: cfgSnap.ProxyID.PartitionOrDefault(),
|
|
},
|
|
cfgSnap.ConnectProxy.InboundPeerTrustBundles,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for idx := range listener.FilterChains {
|
|
// Insert our authz filter before any others
|
|
listener.FilterChains[idx].Filters =
|
|
append([]*envoy_listener_v3.Filter{
|
|
authzFilter,
|
|
}, listener.FilterChains[idx].Filters...)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
const (
|
|
httpConnectionManagerOldName = "envoy.http_connection_manager"
|
|
httpConnectionManagerNewName = "envoy.filters.network.http_connection_manager"
|
|
)
|
|
|
|
func extractRdsResourceNames(listener *envoy_listener_v3.Listener) ([]string, error) {
|
|
var found []string
|
|
|
|
for chainIdx, chain := range listener.FilterChains {
|
|
for filterIdx, filter := range chain.Filters {
|
|
if filter.Name != httpConnectionManagerNewName {
|
|
continue
|
|
}
|
|
|
|
tc, ok := filter.ConfigType.(*envoy_listener_v3.Filter_TypedConfig)
|
|
if !ok {
|
|
return nil, fmt.Errorf(
|
|
"filter chain %d has a %q filter %d with an unsupported config type: %T",
|
|
chainIdx,
|
|
filter.Name,
|
|
filterIdx,
|
|
filter.ConfigType,
|
|
)
|
|
}
|
|
|
|
var hcm envoy_http_v3.HttpConnectionManager
|
|
if err := tc.TypedConfig.UnmarshalTo(&hcm); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if hcm.RouteSpecifier == nil {
|
|
continue
|
|
}
|
|
|
|
rds, ok := hcm.RouteSpecifier.(*envoy_http_v3.HttpConnectionManager_Rds)
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
if rds.Rds == nil {
|
|
continue
|
|
}
|
|
|
|
found = append(found, rds.Rds.RouteConfigName)
|
|
}
|
|
}
|
|
|
|
return found, nil
|
|
}
|
|
|
|
// Locate the existing http connect manager L4 filter and inject our RBAC filter at the top.
|
|
func injectHTTPFilterOnFilterChains(
|
|
listener *envoy_listener_v3.Listener,
|
|
authzFilter *envoy_http_v3.HttpFilter,
|
|
) error {
|
|
for chainIdx, chain := range listener.FilterChains {
|
|
var (
|
|
hcmFilter *envoy_listener_v3.Filter
|
|
hcmFilterIdx int
|
|
)
|
|
|
|
for filterIdx, filter := range chain.Filters {
|
|
if filter.Name == httpConnectionManagerOldName ||
|
|
filter.Name == httpConnectionManagerNewName {
|
|
hcmFilter = filter
|
|
hcmFilterIdx = filterIdx
|
|
break
|
|
}
|
|
}
|
|
if hcmFilter == nil {
|
|
return fmt.Errorf(
|
|
"filter chain %d lacks either a %q or %q filter",
|
|
chainIdx,
|
|
httpConnectionManagerOldName,
|
|
httpConnectionManagerNewName,
|
|
)
|
|
}
|
|
|
|
var hcm envoy_http_v3.HttpConnectionManager
|
|
tc, ok := hcmFilter.ConfigType.(*envoy_listener_v3.Filter_TypedConfig)
|
|
if !ok {
|
|
return fmt.Errorf(
|
|
"filter chain %d has a %q filter with an unsupported config type: %T",
|
|
chainIdx,
|
|
hcmFilter.Name,
|
|
hcmFilter.ConfigType,
|
|
)
|
|
}
|
|
|
|
if err := tc.TypedConfig.UnmarshalTo(&hcm); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Insert our authz filter before any others
|
|
hcm.HttpFilters = append([]*envoy_http_v3.HttpFilter{
|
|
authzFilter,
|
|
}, hcm.HttpFilters...)
|
|
|
|
// And persist the modified filter.
|
|
newFilter, err := makeFilter(hcmFilter.Name, &hcm)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
chain.Filters[hcmFilterIdx] = newFilter
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// NOTE: This method MUST only be used for connect proxy public listeners,
|
|
// since TLS validation will be done against root certs for all peers
|
|
// that might dial this proxy.
|
|
func (s *ResourceGenerator) injectConnectTLSForPublicListener(cfgSnap *proxycfg.ConfigSnapshot, listener *envoy_listener_v3.Listener) error {
|
|
transportSocket, err := createDownstreamTransportSocketForConnectTLS(cfgSnap, cfgSnap.PeeringTrustBundles())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for idx := range listener.FilterChains {
|
|
listener.FilterChains[idx].TransportSocket = transportSocket
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func getAlpnProtocols(protocol string) []string {
|
|
var alpnProtocols []string
|
|
|
|
switch protocol {
|
|
case "grpc", "http2":
|
|
alpnProtocols = append(alpnProtocols, "h2", "http/1.1")
|
|
case "http":
|
|
alpnProtocols = append(alpnProtocols, "http/1.1")
|
|
}
|
|
|
|
return alpnProtocols
|
|
}
|
|
|
|
func createDownstreamTransportSocketForConnectTLS(cfgSnap *proxycfg.ConfigSnapshot, peerBundles []*pbpeering.PeeringTrustBundle) (*envoy_core_v3.TransportSocket, error) {
|
|
switch cfgSnap.Kind {
|
|
case structs.ServiceKindConnectProxy:
|
|
case structs.ServiceKindMeshGateway:
|
|
default:
|
|
return nil, fmt.Errorf("cannot inject peering trust bundles for kind %q", cfgSnap.Kind)
|
|
}
|
|
|
|
// Determine listener protocol type from configured service protocol. Don't hard fail on a config typo,
|
|
//The parse func returns default config if there is an error, so it's safe to continue.
|
|
cfg, _ := ParseProxyConfig(cfgSnap.Proxy.Config)
|
|
|
|
// Create TLS validation context for mTLS with leaf certificate and root certs.
|
|
tlsContext := makeCommonTLSContext(
|
|
cfgSnap.Leaf(),
|
|
cfgSnap.RootPEMs(),
|
|
makeTLSParametersFromProxyTLSConfig(cfgSnap.MeshConfigTLSIncoming()),
|
|
)
|
|
|
|
if tlsContext != nil {
|
|
// Configure alpn protocols on CommonTLSContext
|
|
tlsContext.AlpnProtocols = getAlpnProtocols(cfg.Protocol)
|
|
}
|
|
|
|
// Inject peering trust bundles if this service is exported to peered clusters.
|
|
if len(peerBundles) > 0 {
|
|
spiffeConfig, err := makeSpiffeValidatorConfig(
|
|
cfgSnap.Roots.TrustDomain,
|
|
cfgSnap.RootPEMs(),
|
|
peerBundles,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
typ, ok := tlsContext.ValidationContextType.(*envoy_tls_v3.CommonTlsContext_ValidationContext)
|
|
if !ok {
|
|
return nil, fmt.Errorf("unexpected type for TLS context validation: %T", tlsContext.ValidationContextType)
|
|
}
|
|
|
|
// makeCommonTLSFromLead injects the local trust domain's CA root certs as the TrustedCA.
|
|
// We nil it out here since the local roots are included in the SPIFFE validator config.
|
|
typ.ValidationContext.TrustedCa = nil
|
|
typ.ValidationContext.CustomValidatorConfig = &envoy_core_v3.TypedExtensionConfig{
|
|
// The typed config name is hard-coded because it is not available as a wellknown var in the control plane lib.
|
|
Name: "envoy.tls.cert_validator.spiffe",
|
|
TypedConfig: spiffeConfig,
|
|
}
|
|
}
|
|
|
|
return makeDownstreamTLSTransportSocket(&envoy_tls_v3.DownstreamTlsContext{
|
|
CommonTlsContext: tlsContext,
|
|
RequireClientCertificate: &wrapperspb.BoolValue{Value: true},
|
|
})
|
|
}
|
|
|
|
// SPIFFECertValidatorConfig is used to validate certificates from trust domains other than our own.
|
|
// With cluster peering we expect peered clusters to have independent certificate authorities.
|
|
// This means that we cannot use a single set of root CA certificates to validate client certificates for mTLS,
|
|
// but rather we need to validate against different roots depending on the trust domain of the certificate presented.
|
|
func makeSpiffeValidatorConfig(trustDomain, roots string, peerBundles []*pbpeering.PeeringTrustBundle) (*anypb.Any, error) {
|
|
// Store the trust bundle for the local trust domain.
|
|
bundles := map[string]string{trustDomain: roots}
|
|
|
|
// Store the trust bundle for each trust domain of the peers this proxy is exported to.
|
|
// This allows us to validate traffic from other trust domains.
|
|
for _, b := range peerBundles {
|
|
var pems string
|
|
for _, pem := range b.RootPEMs {
|
|
pems += lib.EnsureTrailingNewline(pem)
|
|
}
|
|
bundles[b.TrustDomain] = pems
|
|
}
|
|
|
|
cfg := &envoy_tls_v3.SPIFFECertValidatorConfig{
|
|
TrustDomains: make([]*envoy_tls_v3.SPIFFECertValidatorConfig_TrustDomain, 0, len(bundles)),
|
|
}
|
|
|
|
for domain, bundle := range bundles {
|
|
cfg.TrustDomains = append(cfg.TrustDomains, &envoy_tls_v3.SPIFFECertValidatorConfig_TrustDomain{
|
|
Name: domain,
|
|
TrustBundle: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_InlineString{
|
|
InlineString: bundle,
|
|
},
|
|
},
|
|
})
|
|
}
|
|
|
|
// Sort the trust domains so that the output is stable.
|
|
// This benefits tests but also prevents Envoy from mistakenly thinking the listener
|
|
// changed and needs to be drained only because this ordering is different.
|
|
sort.Slice(cfg.TrustDomains, func(i int, j int) bool {
|
|
return cfg.TrustDomains[i].Name < cfg.TrustDomains[j].Name
|
|
})
|
|
return anypb.New(cfg)
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeInboundListener(cfgSnap *proxycfg.ConfigSnapshot, name string) (proto.Message, error) {
|
|
var l *envoy_listener_v3.Listener
|
|
var err error
|
|
|
|
cfg, err := ParseProxyConfig(cfgSnap.Proxy.Config)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse Connect.Proxy.Config", "error", err)
|
|
}
|
|
|
|
// This controls if we do L4 or L7 intention checks.
|
|
useHTTPFilter := structs.IsProtocolHTTPLike(cfg.Protocol)
|
|
|
|
// Generate and return custom public listener from config if one was provided.
|
|
if cfg.PublicListenerJSON != "" {
|
|
l, err = makeListenerFromUserConfig(cfg.PublicListenerJSON)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// For HTTP-like services attach an RBAC http filter and do a best-effort insert
|
|
if useHTTPFilter {
|
|
httpAuthzFilter, err := makeRBACHTTPFilter(
|
|
cfgSnap.ConnectProxy.Intentions,
|
|
cfgSnap.IntentionDefaultAllow,
|
|
rbacLocalInfo{
|
|
trustDomain: cfgSnap.Roots.TrustDomain,
|
|
datacenter: cfgSnap.Datacenter,
|
|
partition: cfgSnap.ProxyID.PartitionOrDefault(),
|
|
},
|
|
cfgSnap.ConnectProxy.InboundPeerTrustBundles,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Try our best to inject the HTTP RBAC filter.
|
|
if err := injectHTTPFilterOnFilterChains(l, httpAuthzFilter); err != nil {
|
|
s.Logger.Warn(
|
|
"could not inject the HTTP RBAC filter to enforce intentions on user-provided "+
|
|
"'envoy_public_listener_json' config; falling back on the RBAC network filter instead",
|
|
"proxy", cfgSnap.ProxyID,
|
|
"error", err,
|
|
)
|
|
|
|
// If we get an error inject the RBAC network filter instead.
|
|
useHTTPFilter = false
|
|
}
|
|
}
|
|
|
|
err := s.finalizePublicListenerFromConfig(l, cfgSnap, useHTTPFilter)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to attach Consul filters and TLS context to custom public listener: %v", err)
|
|
}
|
|
return l, nil
|
|
}
|
|
|
|
// No JSON user config, use default listener address
|
|
// Default to listening on all addresses, but override with bind address if one is set.
|
|
addr := cfgSnap.Address
|
|
if addr == "" {
|
|
addr = "0.0.0.0"
|
|
}
|
|
if cfg.BindAddress != "" {
|
|
addr = cfg.BindAddress
|
|
}
|
|
|
|
// Override with bind port if one is set, otherwise default to
|
|
// proxy service's address
|
|
port := cfgSnap.Port
|
|
if cfg.BindPort != 0 {
|
|
port = cfg.BindPort
|
|
}
|
|
|
|
opts := makeListenerOpts{
|
|
name: name,
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
addr: addr,
|
|
port: port,
|
|
direction: envoy_core_v3.TrafficDirection_INBOUND,
|
|
logger: s.Logger,
|
|
}
|
|
l = makeListener(opts)
|
|
s.injectConnectionBalanceConfig(cfg.BalanceInboundConnections, l)
|
|
|
|
var tracing *envoy_http_v3.HttpConnectionManager_Tracing
|
|
if cfg.ListenerTracingJSON != "" {
|
|
if tracing, err = makeTracingFromUserConfig(cfg.ListenerTracingJSON); err != nil {
|
|
s.Logger.Warn("failed to parse ListenerTracingJSON config", "error", err)
|
|
}
|
|
}
|
|
|
|
filterOpts := listenerFilterOpts{
|
|
protocol: cfg.Protocol,
|
|
filterName: name,
|
|
routeName: name,
|
|
cluster: xdscommon.LocalAppClusterName,
|
|
requestTimeoutMs: cfg.LocalRequestTimeoutMs,
|
|
idleTimeoutMs: cfg.LocalIdleTimeoutMs,
|
|
tracing: tracing,
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
logger: s.Logger,
|
|
}
|
|
if useHTTPFilter {
|
|
rbacFilter, err := makeRBACHTTPFilter(
|
|
cfgSnap.ConnectProxy.Intentions,
|
|
cfgSnap.IntentionDefaultAllow,
|
|
rbacLocalInfo{
|
|
trustDomain: cfgSnap.Roots.TrustDomain,
|
|
datacenter: cfgSnap.Datacenter,
|
|
partition: cfgSnap.ProxyID.PartitionOrDefault(),
|
|
},
|
|
cfgSnap.ConnectProxy.InboundPeerTrustBundles,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
filterOpts.httpAuthzFilters = []*envoy_http_v3.HttpFilter{rbacFilter}
|
|
|
|
meshConfig := cfgSnap.MeshConfig()
|
|
includeXFCC := meshConfig == nil || meshConfig.HTTP == nil || !meshConfig.HTTP.SanitizeXForwardedClientCert
|
|
notGRPC := cfg.Protocol != "grpc"
|
|
if includeXFCC && notGRPC {
|
|
filterOpts.forwardClientDetails = true
|
|
filterOpts.forwardClientPolicy = envoy_http_v3.HttpConnectionManager_APPEND_FORWARD
|
|
|
|
addMeta, err := parseXFCCToDynamicMetaHTTPFilter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
filterOpts.httpAuthzFilters = append(filterOpts.httpAuthzFilters, addMeta)
|
|
|
|
}
|
|
}
|
|
|
|
// If an inbound connect limit is set, inject a connection limit filter on each chain.
|
|
if cfg.MaxInboundConnections > 0 {
|
|
connectionLimitFilter, err := makeConnectionLimitFilter(cfg.MaxInboundConnections)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
l.FilterChains = []*envoy_listener_v3.FilterChain{
|
|
{
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
connectionLimitFilter,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
filter, err := makeListenerFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(l.FilterChains) > 0 {
|
|
// The list of FilterChains has already been initialized
|
|
l.FilterChains[0].Filters = append(l.FilterChains[0].Filters, filter)
|
|
} else {
|
|
l.FilterChains = []*envoy_listener_v3.FilterChain{
|
|
{
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
filter,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
err = s.finalizePublicListenerFromConfig(l, cfgSnap, useHTTPFilter)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to attach Consul filters and TLS context to custom public listener: %v", err)
|
|
}
|
|
|
|
return l, err
|
|
}
|
|
|
|
// finalizePublicListenerFromConfig is used for best-effort injection of Consul filter-chains onto listeners.
|
|
// This include L4 authorization filters and TLS context.
|
|
func (s *ResourceGenerator) finalizePublicListenerFromConfig(l *envoy_listener_v3.Listener, cfgSnap *proxycfg.ConfigSnapshot, useHTTPFilter bool) error {
|
|
if !useHTTPFilter {
|
|
// Best-effort injection of L4 intentions
|
|
if err := s.injectConnectFilters(cfgSnap, l); err != nil {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// Always apply TLS certificates
|
|
if err := s.injectConnectTLSForPublicListener(cfgSnap, l); err != nil {
|
|
return nil
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeExposedCheckListener(cfgSnap *proxycfg.ConfigSnapshot, cluster string, path structs.ExposePath) (proto.Message, error) {
|
|
cfg, err := ParseProxyConfig(cfgSnap.Proxy.Config)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse Connect.Proxy.Config", "error", err)
|
|
}
|
|
|
|
// No user config, use default listener
|
|
addr := cfgSnap.Address
|
|
|
|
// Override with bind address if one is set, otherwise default to 0.0.0.0
|
|
if cfg.BindAddress != "" {
|
|
addr = cfg.BindAddress
|
|
} else if addr == "" {
|
|
addr = "0.0.0.0"
|
|
}
|
|
|
|
// Strip any special characters from path to make a valid and hopefully unique name
|
|
r := regexp.MustCompile(`[^a-zA-Z0-9]+`)
|
|
strippedPath := r.ReplaceAllString(path.Path, "")
|
|
listenerName := fmt.Sprintf("exposed_path_%s", strippedPath)
|
|
|
|
listenerOpts := makeListenerOpts{
|
|
name: listenerName,
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
addr: addr,
|
|
port: path.ListenerPort,
|
|
direction: envoy_core_v3.TrafficDirection_INBOUND,
|
|
logger: s.Logger,
|
|
}
|
|
l := makeListener(listenerOpts)
|
|
|
|
filterName := fmt.Sprintf("exposed_path_filter_%s_%d", strippedPath, path.ListenerPort)
|
|
|
|
filterOpts := listenerFilterOpts{
|
|
useRDS: false,
|
|
protocol: path.Protocol,
|
|
filterName: filterName,
|
|
routeName: filterName,
|
|
cluster: cluster,
|
|
statPrefix: "",
|
|
routePath: path.Path,
|
|
httpAuthzFilters: nil,
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
logger: s.Logger,
|
|
// in the exposed check listener we don't set the tracing configuration
|
|
}
|
|
f, err := makeListenerFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
chain := &envoy_listener_v3.FilterChain{
|
|
Filters: []*envoy_listener_v3.Filter{f},
|
|
}
|
|
|
|
// For registered checks restrict traffic sources to localhost and Consul's advertise addr
|
|
if path.ParsedFromCheck {
|
|
|
|
// For the advertise addr we use a CidrRange that only matches one address
|
|
advertise := s.CfgFetcher.AdvertiseAddrLAN()
|
|
|
|
// Get prefix length based on whether address is ipv4 (32 bits) or ipv6 (128 bits)
|
|
advertiseLen := 32
|
|
ip := net.ParseIP(advertise)
|
|
if ip != nil && strings.Contains(advertise, ":") {
|
|
advertiseLen = 128
|
|
}
|
|
|
|
ranges := make([]*envoy_core_v3.CidrRange, 0, 3)
|
|
ranges = append(ranges,
|
|
&envoy_core_v3.CidrRange{AddressPrefix: "127.0.0.1", PrefixLen: &wrapperspb.UInt32Value{Value: 8}},
|
|
&envoy_core_v3.CidrRange{AddressPrefix: advertise, PrefixLen: &wrapperspb.UInt32Value{Value: uint32(advertiseLen)}},
|
|
)
|
|
|
|
if ok, err := kernelSupportsIPv6(); err != nil {
|
|
return nil, err
|
|
} else if ok {
|
|
ranges = append(ranges,
|
|
&envoy_core_v3.CidrRange{AddressPrefix: "::1", PrefixLen: &wrapperspb.UInt32Value{Value: 128}},
|
|
)
|
|
}
|
|
|
|
chain.FilterChainMatch = &envoy_listener_v3.FilterChainMatch{
|
|
SourcePrefixRanges: ranges,
|
|
}
|
|
}
|
|
|
|
l.FilterChains = []*envoy_listener_v3.FilterChain{chain}
|
|
|
|
return l, err
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeTerminatingGatewayListener(
|
|
cfgSnap *proxycfg.ConfigSnapshot,
|
|
name, addr string,
|
|
port int,
|
|
) (*envoy_listener_v3.Listener, error) {
|
|
|
|
listenerOpts := makeListenerOpts{
|
|
name: name,
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
addr: addr,
|
|
port: port,
|
|
direction: envoy_core_v3.TrafficDirection_INBOUND,
|
|
logger: s.Logger,
|
|
}
|
|
l := makeListener(listenerOpts)
|
|
|
|
tlsInspector, err := makeTLSInspectorListenerFilter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
l.ListenerFilters = []*envoy_listener_v3.ListenerFilter{tlsInspector}
|
|
|
|
// Make a FilterChain for each linked service
|
|
// Match on the cluster name,
|
|
for _, svc := range cfgSnap.TerminatingGateway.ValidServices() {
|
|
clusterName := connect.ServiceSNI(svc.Name, "", svc.NamespaceOrDefault(), svc.PartitionOrDefault(), cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain)
|
|
|
|
// Resolvers are optional.
|
|
resolver, hasResolver := cfgSnap.TerminatingGateway.ServiceResolvers[svc]
|
|
|
|
intentions := cfgSnap.TerminatingGateway.Intentions[svc]
|
|
svcConfig := cfgSnap.TerminatingGateway.ServiceConfigs[svc]
|
|
|
|
cfg, err := ParseProxyConfig(svcConfig.ProxyConfig)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn(
|
|
"failed to parse Connect.Proxy.Config for linked service",
|
|
"service", svc.String(),
|
|
"error", err,
|
|
)
|
|
}
|
|
|
|
opts := terminatingGatewayFilterChainOpts{
|
|
cluster: clusterName,
|
|
service: svc,
|
|
intentions: intentions,
|
|
protocol: cfg.Protocol,
|
|
}
|
|
|
|
clusterChain, err := s.makeFilterChainTerminatingGateway(cfgSnap, opts)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to make filter chain for cluster %q: %v", clusterName, err)
|
|
}
|
|
l.FilterChains = append(l.FilterChains, clusterChain)
|
|
|
|
// if there is a service-resolver for this service then also setup subset filter chains for it
|
|
if hasResolver {
|
|
// generate 1 filter chain for each service subset
|
|
for subsetName := range resolver.Subsets {
|
|
subsetClusterName := connect.ServiceSNI(svc.Name, subsetName, svc.NamespaceOrDefault(), svc.PartitionOrDefault(), cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain)
|
|
|
|
opts.cluster = subsetClusterName
|
|
subsetClusterChain, err := s.makeFilterChainTerminatingGateway(cfgSnap, opts)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to make filter chain for cluster %q: %v", subsetClusterName, err)
|
|
}
|
|
l.FilterChains = append(l.FilterChains, subsetClusterChain)
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, svc := range cfgSnap.TerminatingGateway.ValidDestinations() {
|
|
intentions := cfgSnap.TerminatingGateway.Intentions[svc]
|
|
svcConfig := cfgSnap.TerminatingGateway.ServiceConfigs[svc]
|
|
|
|
cfg, err := ParseProxyConfig(svcConfig.ProxyConfig)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn(
|
|
"failed to parse Connect.Proxy.Config for linked destination",
|
|
"destination", svc.String(),
|
|
"error", err,
|
|
)
|
|
}
|
|
|
|
var dest *structs.DestinationConfig
|
|
dest = &svcConfig.Destination
|
|
|
|
opts := terminatingGatewayFilterChainOpts{
|
|
service: svc,
|
|
intentions: intentions,
|
|
protocol: cfg.Protocol,
|
|
port: dest.Port,
|
|
}
|
|
for _, address := range dest.Addresses {
|
|
clusterName := clusterNameForDestination(cfgSnap, svc.Name, address, svc.NamespaceOrDefault(), svc.PartitionOrDefault())
|
|
|
|
opts.cluster = clusterName
|
|
opts.address = address
|
|
clusterChain, err := s.makeFilterChainTerminatingGateway(cfgSnap, opts)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to make filter chain for cluster %q: %v", clusterName, err)
|
|
}
|
|
l.FilterChains = append(l.FilterChains, clusterChain)
|
|
}
|
|
|
|
}
|
|
|
|
// Before we add the fallback, sort these chains by the matched name. All
|
|
// of these filter chains are independent, but envoy requires them to be in
|
|
// some order. If we put them in a random order then every xDS iteration
|
|
// envoy will force the listener to be replaced. Sorting these has no
|
|
// effect on how they operate, but it does mean that we won't churn
|
|
// listeners at idle.
|
|
sort.Slice(l.FilterChains, func(i, j int) bool {
|
|
return l.FilterChains[i].FilterChainMatch.ServerNames[0] < l.FilterChains[j].FilterChainMatch.ServerNames[0]
|
|
})
|
|
|
|
// This fallback catch-all filter ensures a listener will be present for health checks to pass
|
|
// Envoy will reset these connections since known endpoints are caught by filter chain matches above
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: "",
|
|
filterName: name,
|
|
logger: s.Logger,
|
|
statPrefix: "terminating_gateway.",
|
|
}
|
|
tcpProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sniCluster, err := makeSNIClusterFilter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fallback := &envoy_listener_v3.FilterChain{
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
sniCluster,
|
|
tcpProxy,
|
|
},
|
|
}
|
|
l.FilterChains = append(l.FilterChains, fallback)
|
|
|
|
return l, nil
|
|
}
|
|
|
|
type terminatingGatewayFilterChainOpts struct {
|
|
cluster string
|
|
service structs.ServiceName
|
|
intentions structs.Intentions
|
|
protocol string
|
|
address string // only valid for destination listeners
|
|
port int // only valid for destination listeners
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeFilterChainTerminatingGateway(cfgSnap *proxycfg.ConfigSnapshot, tgtwyOpts terminatingGatewayFilterChainOpts) (*envoy_listener_v3.FilterChain, error) {
|
|
tlsContext := &envoy_tls_v3.DownstreamTlsContext{
|
|
CommonTlsContext: makeCommonTLSContext(
|
|
cfgSnap.TerminatingGateway.ServiceLeaves[tgtwyOpts.service],
|
|
cfgSnap.RootPEMs(),
|
|
makeTLSParametersFromProxyTLSConfig(cfgSnap.MeshConfigTLSIncoming()),
|
|
),
|
|
RequireClientCertificate: &wrapperspb.BoolValue{Value: true},
|
|
}
|
|
transportSocket, err := makeDownstreamTLSTransportSocket(tlsContext)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
filterChain := &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: makeSNIFilterChainMatch(tgtwyOpts.cluster),
|
|
Filters: make([]*envoy_listener_v3.Filter, 0, 3),
|
|
TransportSocket: transportSocket,
|
|
}
|
|
|
|
// This controls if we do L4 or L7 intention checks.
|
|
useHTTPFilter := structs.IsProtocolHTTPLike(tgtwyOpts.protocol)
|
|
|
|
// If this is L4, the first filter we setup is to do intention checks.
|
|
if !useHTTPFilter {
|
|
authFilter, err := makeRBACNetworkFilter(
|
|
tgtwyOpts.intentions,
|
|
cfgSnap.IntentionDefaultAllow,
|
|
rbacLocalInfo{
|
|
trustDomain: cfgSnap.Roots.TrustDomain,
|
|
datacenter: cfgSnap.Datacenter,
|
|
partition: cfgSnap.ProxyID.PartitionOrDefault(),
|
|
},
|
|
nil, // TODO(peering): verify intentions w peers don't apply to terminatingGateway
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
filterChain.Filters = append(filterChain.Filters, authFilter)
|
|
}
|
|
|
|
proxyCfg, err := ParseProxyConfig(cfgSnap.Proxy.Config)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse Connect.Proxy.Config", "error", err)
|
|
}
|
|
var tracing *envoy_http_v3.HttpConnectionManager_Tracing
|
|
if proxyCfg.ListenerTracingJSON != "" {
|
|
if tracing, err = makeTracingFromUserConfig(proxyCfg.ListenerTracingJSON); err != nil {
|
|
s.Logger.Warn("failed to parse ListenerTracingJSON config", "error", err)
|
|
}
|
|
}
|
|
|
|
// Lastly we setup the actual proxying component. For L4 this is a straight
|
|
// tcp proxy. For L7 this is a very hands-off HTTP proxy just to inject an
|
|
// HTTP filter to do intention checks here instead.
|
|
opts := listenerFilterOpts{
|
|
protocol: tgtwyOpts.protocol,
|
|
filterName: fmt.Sprintf("%s.%s.%s.%s", tgtwyOpts.service.Name, tgtwyOpts.service.NamespaceOrDefault(), tgtwyOpts.service.PartitionOrDefault(), cfgSnap.Datacenter),
|
|
routeName: tgtwyOpts.cluster, // Set cluster name for route config since each will have its own
|
|
cluster: tgtwyOpts.cluster,
|
|
statPrefix: "upstream.",
|
|
routePath: "",
|
|
tracing: tracing,
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
logger: s.Logger,
|
|
}
|
|
|
|
if useHTTPFilter {
|
|
var err error
|
|
rbacFilter, err := makeRBACHTTPFilter(
|
|
tgtwyOpts.intentions,
|
|
cfgSnap.IntentionDefaultAllow,
|
|
rbacLocalInfo{
|
|
trustDomain: cfgSnap.Roots.TrustDomain,
|
|
datacenter: cfgSnap.Datacenter,
|
|
partition: cfgSnap.ProxyID.PartitionOrDefault(),
|
|
},
|
|
nil, // TODO(peering): verify intentions w peers don't apply to terminatingGateway
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
opts.httpAuthzFilters = []*envoy_http_v3.HttpFilter{rbacFilter}
|
|
|
|
opts.cluster = ""
|
|
opts.useRDS = true
|
|
|
|
if meshConfig := cfgSnap.MeshConfig(); meshConfig == nil || meshConfig.HTTP == nil || !meshConfig.HTTP.SanitizeXForwardedClientCert {
|
|
opts.forwardClientDetails = true
|
|
// This assumes that we have a client cert (mTLS) (implied by the context of this function)
|
|
opts.forwardClientPolicy = envoy_http_v3.HttpConnectionManager_APPEND_FORWARD
|
|
}
|
|
}
|
|
|
|
filter, err := makeListenerFilter(opts)
|
|
if err != nil {
|
|
s.Logger.Error("failed to make listener", "cluster", tgtwyOpts.cluster, "error", err)
|
|
return nil, err
|
|
}
|
|
filterChain.Filters = append(filterChain.Filters, filter)
|
|
|
|
return filterChain, nil
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeMeshGatewayListener(name, addr string, port int, cfgSnap *proxycfg.ConfigSnapshot) (*envoy_listener_v3.Listener, error) {
|
|
tlsInspector, err := makeTLSInspectorListenerFilter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sniCluster, err := makeSNIClusterFilter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// The cluster name here doesn't matter as the sni_cluster
|
|
// filter will fill it in for us.
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: "",
|
|
filterName: name,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_local.",
|
|
}
|
|
tcpProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sniClusterChain := &envoy_listener_v3.FilterChain{
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
sniCluster,
|
|
tcpProxy,
|
|
},
|
|
}
|
|
|
|
opts := makeListenerOpts{
|
|
name: name,
|
|
accessLogs: cfgSnap.Proxy.AccessLogs,
|
|
addr: addr,
|
|
port: port,
|
|
direction: envoy_core_v3.TrafficDirection_UNSPECIFIED,
|
|
logger: s.Logger,
|
|
}
|
|
l := makeListener(opts)
|
|
l.ListenerFilters = []*envoy_listener_v3.ListenerFilter{tlsInspector}
|
|
|
|
for _, svc := range cfgSnap.MeshGatewayValidExportedServices() {
|
|
peerNames := cfgSnap.MeshGateway.ExportedServicesWithPeers[svc]
|
|
chain := cfgSnap.MeshGateway.DiscoveryChain[svc]
|
|
|
|
filterChain, err := s.makeMeshGatewayPeerFilterChain(cfgSnap, svc, peerNames, chain)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if filterChain == nil {
|
|
continue
|
|
}
|
|
|
|
l.FilterChains = append(l.FilterChains, filterChain)
|
|
}
|
|
|
|
// We need 1 Filter Chain per remote cluster
|
|
keys := cfgSnap.MeshGateway.GatewayKeys()
|
|
for _, key := range keys {
|
|
if key.Matches(cfgSnap.Datacenter, cfgSnap.ProxyID.PartitionOrEmpty()) {
|
|
continue // skip local
|
|
}
|
|
|
|
clusterName := connect.GatewaySNI(key.Datacenter, key.Partition, cfgSnap.Roots.TrustDomain)
|
|
filterName := fmt.Sprintf("%s.%s", name, key.String())
|
|
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: clusterName,
|
|
filterName: filterName,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_remote.",
|
|
}
|
|
dcTCPProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
l.FilterChains = append(l.FilterChains, &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: []string{fmt.Sprintf("*.%s", clusterName)},
|
|
},
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
dcTCPProxy,
|
|
},
|
|
})
|
|
}
|
|
|
|
// --------
|
|
// WAN Federation over mesh gateways
|
|
// --------
|
|
|
|
if cfgSnap.ProxyID.InDefaultPartition() &&
|
|
cfgSnap.ServiceMeta[structs.MetaWANFederationKey] == "1" &&
|
|
cfgSnap.ServerSNIFn != nil {
|
|
|
|
for _, key := range keys {
|
|
if key.Datacenter == cfgSnap.Datacenter {
|
|
continue // skip local
|
|
}
|
|
clusterName := cfgSnap.ServerSNIFn(key.Datacenter, "")
|
|
filterName := fmt.Sprintf("%s.%s", name, key.String())
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: clusterName,
|
|
filterName: filterName,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_remote.",
|
|
}
|
|
dcTCPProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
l.FilterChains = append(l.FilterChains, &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: []string{fmt.Sprintf("*.%s", clusterName)},
|
|
},
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
dcTCPProxy,
|
|
},
|
|
})
|
|
}
|
|
|
|
// Wildcard all flavors to each server.
|
|
servers, _ := cfgSnap.MeshGateway.WatchedLocalServers.Get(structs.ConsulServiceName)
|
|
for _, srv := range servers {
|
|
clusterName := cfgSnap.ServerSNIFn(cfgSnap.Datacenter, srv.Node.Node)
|
|
|
|
filterName := fmt.Sprintf("%s.%s", name, cfgSnap.Datacenter)
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: clusterName,
|
|
filterName: filterName,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_local_server.",
|
|
}
|
|
dcTCPProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
l.FilterChains = append(l.FilterChains, &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: []string{clusterName},
|
|
},
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
dcTCPProxy,
|
|
},
|
|
})
|
|
}
|
|
}
|
|
|
|
// --------
|
|
// Peering control plane
|
|
// --------
|
|
|
|
// Create a single filter chain for local servers to be dialed by peers.
|
|
// When peering through gateways we load balance across the local servers. They cannot be addressed individually.
|
|
if cfgSnap.MeshConfig().PeerThroughMeshGateways() {
|
|
servers, _ := cfgSnap.MeshGateway.WatchedLocalServers.Get(structs.ConsulServiceName)
|
|
|
|
// Peering control-plane traffic can only ever be handled by the local leader.
|
|
// We avoid routing to read replicas since they will never be Raft voters.
|
|
if haveVoters(servers) {
|
|
clusterName := connect.PeeringServerSAN(cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain)
|
|
filterName := fmt.Sprintf("%s.%s", name, cfgSnap.Datacenter)
|
|
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: clusterName,
|
|
filterName: filterName,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_local_peering_server.",
|
|
}
|
|
filter, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
l.FilterChains = append(l.FilterChains, &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: []string{clusterName},
|
|
},
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
filter,
|
|
},
|
|
})
|
|
}
|
|
}
|
|
|
|
// Create a filter chain per outbound peer server cluster. Listen for the SNI provided
|
|
// as the peer's ServerName.
|
|
var peerServerFilterChains []*envoy_listener_v3.FilterChain
|
|
for name := range cfgSnap.MeshGateway.PeerServers {
|
|
|
|
filterOpts := listenerFilterOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
cluster: name,
|
|
filterName: name,
|
|
logger: s.Logger,
|
|
statPrefix: "mesh_gateway_remote_peering_servers.",
|
|
}
|
|
dcTCPProxy, err := makeTCPProxyFilter(filterOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
peerServerFilterChains = append(peerServerFilterChains, &envoy_listener_v3.FilterChain{
|
|
FilterChainMatch: makeSNIFilterChainMatch(name),
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
dcTCPProxy,
|
|
},
|
|
})
|
|
}
|
|
|
|
// Sort so the output is stable and the listener doesn't get drained
|
|
sort.Slice(peerServerFilterChains, func(i, j int) bool {
|
|
return peerServerFilterChains[i].FilterChainMatch.ServerNames[0] < peerServerFilterChains[j].FilterChainMatch.ServerNames[0]
|
|
})
|
|
l.FilterChains = append(l.FilterChains, peerServerFilterChains...)
|
|
|
|
// This needs to get tacked on at the end as it has no
|
|
// matching and will act as a catch all
|
|
l.FilterChains = append(l.FilterChains, sniClusterChain)
|
|
|
|
return l, nil
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeMeshGatewayPeerFilterChain(
|
|
cfgSnap *proxycfg.ConfigSnapshot,
|
|
svc structs.ServiceName,
|
|
peerNames []string,
|
|
chain *structs.CompiledDiscoveryChain,
|
|
) (*envoy_listener_v3.FilterChain, error) {
|
|
var (
|
|
useHTTPFilter = structs.IsProtocolHTTPLike(chain.Protocol)
|
|
// RDS, Envoy's Route Discovery Service, is only used for HTTP services.
|
|
useRDS = useHTTPFilter
|
|
)
|
|
|
|
if useHTTPFilter && cfgSnap.MeshGateway.Leaf == nil {
|
|
return nil, nil // ignore; not ready
|
|
}
|
|
|
|
var clusterName string
|
|
if !useRDS {
|
|
// When not using RDS we must generate a cluster name to attach to the filter chain.
|
|
// With RDS, cluster names get attached to the dynamic routes instead.
|
|
target, err := simpleChainTarget(chain)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
clusterName = meshGatewayExportedClusterNamePrefix + CustomizeClusterName(target.Name, chain)
|
|
}
|
|
|
|
uid := proxycfg.NewUpstreamIDFromServiceName(svc)
|
|
|
|
filterName := fmt.Sprintf("%s.%s.%s.%s", chain.ServiceName, chain.Namespace, chain.Partition, chain.Datacenter)
|
|
|
|
filterChain, err := s.makeUpstreamFilterChain(filterChainOpts{
|
|
accessLogs: &cfgSnap.Proxy.AccessLogs,
|
|
routeName: uid.EnvoyID(),
|
|
clusterName: clusterName,
|
|
filterName: filterName,
|
|
protocol: chain.Protocol,
|
|
useRDS: useRDS,
|
|
statPrefix: "mesh_gateway_local_peered.",
|
|
forwardClientDetails: true,
|
|
forwardClientPolicy: envoy_http_v3.HttpConnectionManager_SANITIZE_SET,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var peeredServerNames []string
|
|
for _, peerName := range peerNames {
|
|
peeredSNI := connect.PeeredServiceSNI(
|
|
svc.Name,
|
|
svc.NamespaceOrDefault(),
|
|
svc.PartitionOrDefault(),
|
|
peerName,
|
|
cfgSnap.Roots.TrustDomain,
|
|
)
|
|
peeredServerNames = append(peeredServerNames, peeredSNI)
|
|
}
|
|
filterChain.FilterChainMatch = &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: peeredServerNames,
|
|
}
|
|
|
|
if useHTTPFilter {
|
|
// We only terminate TLS if we're doing an L7 proxy.
|
|
var peerBundles []*pbpeering.PeeringTrustBundle
|
|
for _, bundle := range cfgSnap.MeshGateway.PeeringTrustBundles {
|
|
if stringslice.Contains(peerNames, bundle.PeerName) {
|
|
peerBundles = append(peerBundles, bundle)
|
|
}
|
|
}
|
|
|
|
peeredTransportSocket, err := createDownstreamTransportSocketForConnectTLS(cfgSnap, peerBundles)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
filterChain.TransportSocket = peeredTransportSocket
|
|
}
|
|
|
|
return filterChain, nil
|
|
}
|
|
|
|
type filterChainOpts struct {
|
|
accessLogs *structs.AccessLogsConfig
|
|
routeName string
|
|
clusterName string
|
|
filterName string
|
|
protocol string
|
|
useRDS bool
|
|
tlsContext *envoy_tls_v3.DownstreamTlsContext
|
|
statPrefix string
|
|
forwardClientDetails bool
|
|
forwardClientPolicy envoy_http_v3.HttpConnectionManager_ForwardClientCertDetails
|
|
tracing *envoy_http_v3.HttpConnectionManager_Tracing
|
|
}
|
|
|
|
func (s *ResourceGenerator) makeUpstreamFilterChain(opts filterChainOpts) (*envoy_listener_v3.FilterChain, error) {
|
|
if opts.statPrefix == "" {
|
|
opts.statPrefix = "upstream."
|
|
}
|
|
filter, err := makeListenerFilter(listenerFilterOpts{
|
|
useRDS: opts.useRDS,
|
|
protocol: opts.protocol,
|
|
filterName: opts.filterName,
|
|
routeName: opts.routeName,
|
|
cluster: opts.clusterName,
|
|
statPrefix: opts.statPrefix,
|
|
forwardClientDetails: opts.forwardClientDetails,
|
|
forwardClientPolicy: opts.forwardClientPolicy,
|
|
tracing: opts.tracing,
|
|
accessLogs: opts.accessLogs,
|
|
logger: s.Logger,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
transportSocket, err := makeDownstreamTLSTransportSocket(opts.tlsContext)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &envoy_listener_v3.FilterChain{
|
|
Filters: []*envoy_listener_v3.Filter{
|
|
filter,
|
|
},
|
|
TransportSocket: transportSocket,
|
|
}, nil
|
|
}
|
|
|
|
// simpleChainTarget returns the discovery target for a chain with a single node.
|
|
// A chain can have a single target if it is for a TCP service or an HTTP service without
|
|
// multiple splits/routes/failovers.
|
|
func simpleChainTarget(chain *structs.CompiledDiscoveryChain) (*structs.DiscoveryTarget, error) {
|
|
startNode := chain.Nodes[chain.StartNode]
|
|
if startNode == nil {
|
|
return nil, fmt.Errorf("missing first node in compiled discovery chain for: %s", chain.ServiceName)
|
|
}
|
|
if startNode.Type != structs.DiscoveryGraphNodeTypeResolver {
|
|
return nil, fmt.Errorf("expected discovery chain with single node, found unexpected start node: %s", startNode.Type)
|
|
}
|
|
targetID := startNode.Resolver.Target
|
|
return chain.Targets[targetID], nil
|
|
}
|
|
|
|
func (s *ResourceGenerator) getAndModifyUpstreamConfigForListener(
|
|
uid proxycfg.UpstreamID,
|
|
u *structs.Upstream,
|
|
chain *structs.CompiledDiscoveryChain,
|
|
) structs.UpstreamConfig {
|
|
var (
|
|
cfg structs.UpstreamConfig
|
|
err error
|
|
)
|
|
|
|
configMap := make(map[string]interface{})
|
|
if u != nil {
|
|
configMap = u.Config
|
|
}
|
|
if chain == nil || chain.Default {
|
|
cfg, err = structs.ParseUpstreamConfigNoDefaults(configMap)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse", "upstream", uid, "error", err)
|
|
}
|
|
} else {
|
|
// Use NoDefaults here so that we can set the protocol to the chain
|
|
// protocol if necessary
|
|
cfg, err = structs.ParseUpstreamConfigNoDefaults(configMap)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse", "upstream", uid, "error", err)
|
|
}
|
|
|
|
if cfg.EnvoyListenerJSON != "" {
|
|
s.Logger.Warn("ignoring escape hatch setting because already configured for",
|
|
"discovery chain", chain.ServiceName, "upstream", uid, "config", "envoy_listener_json")
|
|
|
|
// Remove from config struct so we don't use it later on
|
|
cfg.EnvoyListenerJSON = ""
|
|
}
|
|
}
|
|
protocol := cfg.Protocol
|
|
if chain != nil {
|
|
if protocol == "" {
|
|
protocol = chain.Protocol
|
|
}
|
|
if protocol == "" {
|
|
protocol = "tcp"
|
|
}
|
|
} else {
|
|
protocol = "tcp"
|
|
}
|
|
|
|
// set back on the config so that we can use it from return value
|
|
cfg.Protocol = protocol
|
|
|
|
return cfg
|
|
}
|
|
|
|
func (s *ResourceGenerator) getAndModifyUpstreamConfigForPeeredListener(
|
|
uid proxycfg.UpstreamID,
|
|
u *structs.Upstream,
|
|
peerMeta structs.PeeringServiceMeta,
|
|
) structs.UpstreamConfig {
|
|
var (
|
|
cfg structs.UpstreamConfig
|
|
err error
|
|
)
|
|
|
|
configMap := make(map[string]interface{})
|
|
if u != nil {
|
|
configMap = u.Config
|
|
}
|
|
|
|
cfg, err = structs.ParseUpstreamConfigNoDefaults(configMap)
|
|
if err != nil {
|
|
// Don't hard fail on a config typo, just warn. The parse func returns
|
|
// default config if there is an error so it's safe to continue.
|
|
s.Logger.Warn("failed to parse", "upstream", uid, "error", err)
|
|
}
|
|
|
|
// Ignore the configured protocol for peer upstreams, since it is defined by the remote
|
|
// cluster, which we cannot control.
|
|
protocol := peerMeta.Protocol
|
|
if protocol == "" {
|
|
protocol = "tcp"
|
|
}
|
|
|
|
// set back on the config so that we can use it from return value
|
|
cfg.Protocol = protocol
|
|
|
|
if cfg.ConnectTimeoutMs == 0 {
|
|
cfg.ConnectTimeoutMs = 5000
|
|
}
|
|
|
|
if cfg.MeshGateway.Mode == "" && u != nil {
|
|
cfg.MeshGateway = u.MeshGateway
|
|
}
|
|
|
|
return cfg
|
|
}
|
|
|
|
type listenerFilterOpts struct {
|
|
// All listener filters
|
|
accessLogs *structs.AccessLogsConfig
|
|
cluster string
|
|
filterName string
|
|
logger hclog.Logger
|
|
protocol string
|
|
statPrefix string
|
|
|
|
// HTTP listener filter options
|
|
forwardClientDetails bool
|
|
forwardClientPolicy envoy_http_v3.HttpConnectionManager_ForwardClientCertDetails
|
|
httpAuthzFilters []*envoy_http_v3.HttpFilter
|
|
idleTimeoutMs *int
|
|
requestTimeoutMs *int
|
|
routeName string
|
|
routePath string
|
|
tracing *envoy_http_v3.HttpConnectionManager_Tracing
|
|
useRDS bool
|
|
}
|
|
|
|
func makeListenerFilter(opts listenerFilterOpts) (*envoy_listener_v3.Filter, error) {
|
|
switch opts.protocol {
|
|
case "grpc", "http2", "http":
|
|
return makeHTTPFilter(opts)
|
|
case "tcp":
|
|
fallthrough
|
|
default:
|
|
if opts.useRDS {
|
|
return nil, fmt.Errorf("RDS is not compatible with the tcp proxy filter")
|
|
} else if opts.cluster == "" {
|
|
return nil, fmt.Errorf("cluster name is required for a tcp proxy filter")
|
|
}
|
|
return makeTCPProxyFilter(opts)
|
|
}
|
|
}
|
|
|
|
func makeTLSInspectorListenerFilter() (*envoy_listener_v3.ListenerFilter, error) {
|
|
return makeEnvoyListenerFilter("envoy.filters.listener.tls_inspector", &envoy_tls_inspector_v3.TlsInspector{})
|
|
}
|
|
|
|
func makeHTTPInspectorListenerFilter() (*envoy_listener_v3.ListenerFilter, error) {
|
|
return makeEnvoyListenerFilter("envoy.filters.listener.http_inspector", &envoy_extensions_filters_listener_http_inspector_v3.HttpInspector{})
|
|
}
|
|
|
|
func makeSNIFilterChainMatch(sniMatches ...string) *envoy_listener_v3.FilterChainMatch {
|
|
if sniMatches == nil {
|
|
return nil
|
|
}
|
|
return &envoy_listener_v3.FilterChainMatch{
|
|
ServerNames: sniMatches,
|
|
}
|
|
}
|
|
|
|
func makeSNIClusterFilter() (*envoy_listener_v3.Filter, error) {
|
|
return makeFilter("envoy.filters.network.sni_cluster", &envoy_sni_cluster_v3.SniCluster{})
|
|
}
|
|
|
|
func makeTCPProxyFilter(opts listenerFilterOpts) (*envoy_listener_v3.Filter, error) {
|
|
accessLogs, err := accesslogs.MakeAccessLogs(opts.accessLogs, false)
|
|
if err != nil && opts.logger != nil {
|
|
opts.logger.Warn("could not make access log xds for tcp proxy", err)
|
|
}
|
|
|
|
cfg := &envoy_tcp_proxy_v3.TcpProxy{
|
|
AccessLog: accessLogs,
|
|
ClusterSpecifier: &envoy_tcp_proxy_v3.TcpProxy_Cluster{Cluster: opts.cluster},
|
|
StatPrefix: makeStatPrefix(opts.statPrefix, opts.filterName),
|
|
}
|
|
return makeFilter("envoy.filters.network.tcp_proxy", cfg)
|
|
}
|
|
|
|
func makeConnectionLimitFilter(limit int) (*envoy_listener_v3.Filter, error) {
|
|
cfg := &envoy_connection_limit_v3.ConnectionLimit{
|
|
StatPrefix: "inbound_connection_limit",
|
|
MaxConnections: wrapperspb.UInt64(uint64(limit)),
|
|
}
|
|
return makeFilter("envoy.filters.network.connection_limit", cfg)
|
|
}
|
|
|
|
func makeStatPrefix(prefix, filterName string) string {
|
|
// Replace colons here because Envoy does that in the metrics for the actual
|
|
// clusters but doesn't in the stat prefix here while dashboards assume they
|
|
// will match.
|
|
return fmt.Sprintf("%s%s", prefix, strings.Replace(filterName, ":", "_", -1))
|
|
}
|
|
|
|
func makeTracingFromUserConfig(configJSON string) (*envoy_http_v3.HttpConnectionManager_Tracing, error) {
|
|
// Type field is present so decode it as a anypb.Any
|
|
var any anypb.Any
|
|
if err := protojson.Unmarshal([]byte(configJSON), &any); err != nil {
|
|
return nil, err
|
|
}
|
|
var t envoy_http_v3.HttpConnectionManager_Tracing
|
|
if err := proto.Unmarshal(any.Value, &t); err != nil {
|
|
return nil, err
|
|
}
|
|
return &t, nil
|
|
}
|
|
|
|
func makeHTTPFilter(opts listenerFilterOpts) (*envoy_listener_v3.Filter, error) {
|
|
router, err := makeEnvoyHTTPFilter("envoy.filters.http.router", &envoy_http_router_v3.Router{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
accessLogs, err := accesslogs.MakeAccessLogs(opts.accessLogs, false)
|
|
if err != nil && opts.logger != nil {
|
|
opts.logger.Warn("could not make access log xds for http connection manager", err)
|
|
}
|
|
|
|
cfg := &envoy_http_v3.HttpConnectionManager{
|
|
AccessLog: accessLogs,
|
|
StatPrefix: makeStatPrefix(opts.statPrefix, opts.filterName),
|
|
CodecType: envoy_http_v3.HttpConnectionManager_AUTO,
|
|
HttpFilters: []*envoy_http_v3.HttpFilter{
|
|
router,
|
|
},
|
|
Tracing: &envoy_http_v3.HttpConnectionManager_Tracing{
|
|
// Don't trace any requests by default unless the client application
|
|
// explicitly propagates trace headers that indicate this should be
|
|
// sampled.
|
|
RandomSampling: &envoy_type_v3.Percent{Value: 0.0},
|
|
},
|
|
}
|
|
|
|
if opts.tracing != nil {
|
|
cfg.Tracing = opts.tracing
|
|
}
|
|
|
|
if opts.useRDS {
|
|
if opts.cluster != "" {
|
|
return nil, fmt.Errorf("cannot specify cluster name when using RDS")
|
|
}
|
|
cfg.RouteSpecifier = &envoy_http_v3.HttpConnectionManager_Rds{
|
|
Rds: &envoy_http_v3.Rds{
|
|
RouteConfigName: opts.routeName,
|
|
ConfigSource: &envoy_core_v3.ConfigSource{
|
|
ResourceApiVersion: envoy_core_v3.ApiVersion_V3,
|
|
ConfigSourceSpecifier: &envoy_core_v3.ConfigSource_Ads{
|
|
Ads: &envoy_core_v3.AggregatedConfigSource{},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
} else {
|
|
if opts.cluster == "" {
|
|
return nil, fmt.Errorf("must specify cluster name when not using RDS")
|
|
}
|
|
|
|
route := &envoy_route_v3.Route{
|
|
Match: &envoy_route_v3.RouteMatch{
|
|
PathSpecifier: &envoy_route_v3.RouteMatch_Prefix{
|
|
Prefix: "/",
|
|
},
|
|
// TODO(banks) Envoy supports matching only valid GRPC
|
|
// requests which might be nice to add here for gRPC services
|
|
// but it's not supported in our current envoy SDK version
|
|
// although docs say it was supported by 1.8.0. Going to defer
|
|
// that until we've updated the deps.
|
|
},
|
|
Action: &envoy_route_v3.Route_Route{
|
|
Route: &envoy_route_v3.RouteAction{
|
|
ClusterSpecifier: &envoy_route_v3.RouteAction_Cluster{
|
|
Cluster: opts.cluster,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
if opts.requestTimeoutMs != nil {
|
|
r := route.GetRoute()
|
|
r.Timeout = durationpb.New(time.Duration(*opts.requestTimeoutMs) * time.Millisecond)
|
|
}
|
|
|
|
if opts.idleTimeoutMs != nil {
|
|
r := route.GetRoute()
|
|
r.IdleTimeout = durationpb.New(time.Duration(*opts.idleTimeoutMs) * time.Millisecond)
|
|
}
|
|
|
|
// If a path is provided, do not match on a catch-all prefix
|
|
if opts.routePath != "" {
|
|
route.Match.PathSpecifier = &envoy_route_v3.RouteMatch_Path{Path: opts.routePath}
|
|
}
|
|
|
|
cfg.RouteSpecifier = &envoy_http_v3.HttpConnectionManager_RouteConfig{
|
|
RouteConfig: &envoy_route_v3.RouteConfiguration{
|
|
Name: opts.routeName,
|
|
VirtualHosts: []*envoy_route_v3.VirtualHost{
|
|
{
|
|
Name: opts.filterName,
|
|
Domains: []string{"*"},
|
|
Routes: []*envoy_route_v3.Route{
|
|
route,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
if opts.protocol == "http2" || opts.protocol == "grpc" {
|
|
cfg.Http2ProtocolOptions = &envoy_core_v3.Http2ProtocolOptions{}
|
|
}
|
|
|
|
// Note the default leads to setting HttpConnectionManager_SANITIZE
|
|
if opts.forwardClientDetails {
|
|
cfg.ForwardClientCertDetails = opts.forwardClientPolicy
|
|
cfg.SetCurrentClientCertDetails = &envoy_http_v3.HttpConnectionManager_SetCurrentClientCertDetails{
|
|
Subject: &wrapperspb.BoolValue{Value: true},
|
|
Cert: true,
|
|
Chain: true,
|
|
Dns: true,
|
|
Uri: true,
|
|
}
|
|
}
|
|
|
|
// Like injectConnectFilters for L4, here we ensure that the first filter
|
|
// (other than the "envoy.grpc_http1_bridge" filter) in the http filter
|
|
// chain of a public listener is the authz filter to prevent unauthorized
|
|
// access and that every filter chain uses our TLS certs.
|
|
if len(opts.httpAuthzFilters) > 0 {
|
|
cfg.HttpFilters = append(opts.httpAuthzFilters, cfg.HttpFilters...)
|
|
}
|
|
|
|
if opts.protocol == "grpc" {
|
|
grpcHttp1Bridge, err := makeEnvoyHTTPFilter(
|
|
"envoy.filters.http.grpc_http1_bridge",
|
|
&envoy_grpc_http1_bridge_v3.Config{},
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// In envoy 1.14.x the default value "stats_for_all_methods=true" was
|
|
// deprecated, and was changed to "false" in 1.18.x. Avoid using the
|
|
// default. TODO: we may want to expose this to users somehow easily.
|
|
grpcStatsFilter, err := makeEnvoyHTTPFilter(
|
|
"envoy.filters.http.grpc_stats",
|
|
&envoy_grpc_stats_v3.FilterConfig{
|
|
PerMethodStatSpecifier: &envoy_grpc_stats_v3.FilterConfig_StatsForAllMethods{
|
|
StatsForAllMethods: makeBoolValue(true),
|
|
},
|
|
},
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Add grpc bridge before router and authz, and the stats in front of that.
|
|
cfg.HttpFilters = append([]*envoy_http_v3.HttpFilter{
|
|
grpcStatsFilter,
|
|
grpcHttp1Bridge,
|
|
}, cfg.HttpFilters...)
|
|
}
|
|
|
|
return makeFilter("envoy.filters.network.http_connection_manager", cfg)
|
|
}
|
|
|
|
func makeEnvoyListenerFilter(name string, cfg proto.Message) (*envoy_listener_v3.ListenerFilter, error) {
|
|
any, err := anypb.New(cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &envoy_listener_v3.ListenerFilter{
|
|
Name: name,
|
|
ConfigType: &envoy_listener_v3.ListenerFilter_TypedConfig{TypedConfig: any},
|
|
}, nil
|
|
}
|
|
|
|
func makeFilter(name string, cfg proto.Message) (*envoy_listener_v3.Filter, error) {
|
|
any, err := anypb.New(cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &envoy_listener_v3.Filter{
|
|
Name: name,
|
|
ConfigType: &envoy_listener_v3.Filter_TypedConfig{TypedConfig: any},
|
|
}, nil
|
|
}
|
|
|
|
func makeEnvoyHTTPFilter(name string, cfg proto.Message) (*envoy_http_v3.HttpFilter, error) {
|
|
any, err := anypb.New(cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &envoy_http_v3.HttpFilter{
|
|
Name: name,
|
|
ConfigType: &envoy_http_v3.HttpFilter_TypedConfig{TypedConfig: any},
|
|
}, nil
|
|
}
|
|
|
|
func makeCommonTLSContext(
|
|
leaf *structs.IssuedCert,
|
|
rootPEMs string,
|
|
tlsParams *envoy_tls_v3.TlsParameters,
|
|
) *envoy_tls_v3.CommonTlsContext {
|
|
if rootPEMs == "" {
|
|
return nil
|
|
}
|
|
if tlsParams == nil {
|
|
tlsParams = &envoy_tls_v3.TlsParameters{}
|
|
}
|
|
|
|
return &envoy_tls_v3.CommonTlsContext{
|
|
TlsParams: tlsParams,
|
|
TlsCertificates: []*envoy_tls_v3.TlsCertificate{
|
|
{
|
|
CertificateChain: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_InlineString{
|
|
InlineString: lib.EnsureTrailingNewline(leaf.CertPEM),
|
|
},
|
|
},
|
|
PrivateKey: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_InlineString{
|
|
InlineString: lib.EnsureTrailingNewline(leaf.PrivateKeyPEM),
|
|
},
|
|
},
|
|
},
|
|
},
|
|
ValidationContextType: &envoy_tls_v3.CommonTlsContext_ValidationContext{
|
|
ValidationContext: &envoy_tls_v3.CertificateValidationContext{
|
|
// TODO(banks): later for L7 support we may need to configure ALPN here.
|
|
TrustedCa: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_InlineString{
|
|
InlineString: rootPEMs,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
func makeDownstreamTLSTransportSocket(tlsContext *envoy_tls_v3.DownstreamTlsContext) (*envoy_core_v3.TransportSocket, error) {
|
|
if tlsContext == nil {
|
|
return nil, nil
|
|
}
|
|
return makeTransportSocket("tls", tlsContext)
|
|
}
|
|
|
|
func makeUpstreamTLSTransportSocket(tlsContext *envoy_tls_v3.UpstreamTlsContext) (*envoy_core_v3.TransportSocket, error) {
|
|
if tlsContext == nil {
|
|
return nil, nil
|
|
}
|
|
return makeTransportSocket("tls", tlsContext)
|
|
}
|
|
|
|
func makeTransportSocket(name string, config proto.Message) (*envoy_core_v3.TransportSocket, error) {
|
|
any, err := anypb.New(config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &envoy_core_v3.TransportSocket{
|
|
Name: name,
|
|
ConfigType: &envoy_core_v3.TransportSocket_TypedConfig{
|
|
TypedConfig: any,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
func makeCommonTLSContextFromFiles(caFile, certFile, keyFile string) *envoy_tls_v3.CommonTlsContext {
|
|
ctx := envoy_tls_v3.CommonTlsContext{
|
|
TlsParams: &envoy_tls_v3.TlsParameters{},
|
|
}
|
|
|
|
// Verify certificate of peer if caFile is specified
|
|
if caFile != "" {
|
|
ctx.ValidationContextType = &envoy_tls_v3.CommonTlsContext_ValidationContext{
|
|
ValidationContext: &envoy_tls_v3.CertificateValidationContext{
|
|
TrustedCa: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_Filename{
|
|
Filename: caFile,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// Present certificate for mTLS if cert and key files are specified
|
|
if certFile != "" && keyFile != "" {
|
|
ctx.TlsCertificates = []*envoy_tls_v3.TlsCertificate{
|
|
{
|
|
CertificateChain: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_Filename{
|
|
Filename: certFile,
|
|
},
|
|
},
|
|
PrivateKey: &envoy_core_v3.DataSource{
|
|
Specifier: &envoy_core_v3.DataSource_Filename{
|
|
Filename: keyFile,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
return &ctx
|
|
}
|
|
|
|
func validateListenerTLSConfig(tlsMinVersion types.TLSVersion, cipherSuites []types.TLSCipherSuite) error {
|
|
// Validate. Configuring cipher suites is only applicable to connections negotiated
|
|
// via TLS 1.2 or earlier. Other cases shouldn't be possible as we validate them at
|
|
// input but be resilient to bugs later.
|
|
if len(cipherSuites) != 0 {
|
|
if _, ok := tlsVersionsWithConfigurableCipherSuites[tlsMinVersion]; !ok {
|
|
return fmt.Errorf("configuring CipherSuites is only applicable to connections negotiated with TLS 1.2 or earlier, TLSMinVersion is set to %s in config", tlsMinVersion)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
var tlsVersionsWithConfigurableCipherSuites = map[types.TLSVersion]struct{}{
|
|
// Remove these two if Envoy ever sets TLS 1.3 as default minimum
|
|
types.TLSVersionUnspecified: {},
|
|
types.TLSVersionAuto: {},
|
|
|
|
types.TLSv1_0: {},
|
|
types.TLSv1_1: {},
|
|
types.TLSv1_2: {},
|
|
}
|
|
|
|
func makeTLSParametersFromProxyTLSConfig(tlsConf *structs.MeshDirectionalTLSConfig) *envoy_tls_v3.TlsParameters {
|
|
if tlsConf == nil {
|
|
return &envoy_tls_v3.TlsParameters{}
|
|
}
|
|
|
|
return makeTLSParametersFromTLSConfig(tlsConf.TLSMinVersion, tlsConf.TLSMaxVersion, tlsConf.CipherSuites)
|
|
}
|
|
|
|
func makeTLSParametersFromTLSConfig(
|
|
tlsMinVersion types.TLSVersion,
|
|
tlsMaxVersion types.TLSVersion,
|
|
cipherSuites []types.TLSCipherSuite,
|
|
) *envoy_tls_v3.TlsParameters {
|
|
tlsParams := envoy_tls_v3.TlsParameters{}
|
|
|
|
if tlsMinVersion != types.TLSVersionUnspecified {
|
|
if minVersion, ok := envoyTLSVersions[tlsMinVersion]; ok {
|
|
tlsParams.TlsMinimumProtocolVersion = minVersion
|
|
}
|
|
}
|
|
if tlsMaxVersion != types.TLSVersionUnspecified {
|
|
if maxVersion, ok := envoyTLSVersions[tlsMaxVersion]; ok {
|
|
tlsParams.TlsMaximumProtocolVersion = maxVersion
|
|
}
|
|
}
|
|
if len(cipherSuites) != 0 {
|
|
tlsParams.CipherSuites = types.MarshalEnvoyTLSCipherSuiteStrings(cipherSuites)
|
|
}
|
|
|
|
return &tlsParams
|
|
}
|
|
|
|
var envoyTLSVersions = map[types.TLSVersion]envoy_tls_v3.TlsParameters_TlsProtocol{
|
|
types.TLSVersionAuto: envoy_tls_v3.TlsParameters_TLS_AUTO,
|
|
types.TLSv1_0: envoy_tls_v3.TlsParameters_TLSv1_0,
|
|
types.TLSv1_1: envoy_tls_v3.TlsParameters_TLSv1_1,
|
|
types.TLSv1_2: envoy_tls_v3.TlsParameters_TLSv1_2,
|
|
types.TLSv1_3: envoy_tls_v3.TlsParameters_TLSv1_3,
|
|
}
|