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Merge pull request #14981 from hashicorp/peering/dial-through-gateways

This commit is contained in:
Freddy 2022-10-14 09:44:56 -06:00 committed by GitHub
parent 0c8563f060 c77123a2aa
commit 24d0c8801a
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GPG Key ID: 4AEE18F83AFDEB23
28 changed files with 1177 additions and 125 deletions
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3
.changelog/14981.txt Normal file
View File

@ -0,0 +1,3 @@
```release-note:feature
peering: add support for routine peering control-plane traffic through mesh gateways
```

1
acl/acl_oss.go
View File

@ -4,6 +4,7 @@
package acl
const (
WildcardPartitionName = ""
DefaultPartitionName = ""
)

134
agent/consul/leader_peering.go
View File

@ -243,11 +243,22 @@ func (s *Server) syncPeeringsAndBlock(ctx context.Context, logger hclog.Logger,
continue
}
status, found := s.peerStreamServer.StreamStatus(peer.ID)
// We may have written this peering to the store to trigger xDS updates, but still in the process of establishing.
// If there isn't a secret yet, we're still trying to reach the other server.
logger.Trace("reading peering secret", "sequence_id", seq)
secret, err := s.fsm.State().PeeringSecretsRead(ws, peer.ID)
if err != nil {
return fmt.Errorf("failed to read secret for peering: %w", err)
}
if secret.GetStream().GetActiveSecretID() == "" {
continue
}
// TODO(peering): If there is new peering data and a connected stream, should we tear down the stream?
status, found := s.peerStreamServer.StreamStatus(peer.ID)
if found && status.Connected {
// Nothing to do when we already have an active stream to the peer.
// Updated data will only be used if the stream becomes disconnected
// since there's no need to tear down an active stream.
continue
}
logger.Trace("ensuring stream to peer", "peer_id", peer.ID, "sequence_id", seq)
@ -259,7 +270,7 @@ func (s *Server) syncPeeringsAndBlock(ctx context.Context, logger hclog.Logger,
cancel()
}
if err := s.establishStream(ctx, logger, ws, peer, cancelFns); err != nil {
if err := s.establishStream(ctx, logger, peer, secret, cancelFns); err != nil {
// TODO(peering): These errors should be reported in the peer status, otherwise they're only in the logs.
// Lockable status isn't available here though. Could report it via the peering.Service?
logger.Error("error establishing peering stream", "peer_id", peer.ID, "error", err)
@ -273,7 +284,6 @@ func (s *Server) syncPeeringsAndBlock(ctx context.Context, logger hclog.Logger,
logger.Trace("checking connected streams", "streams", connectedStreams, "sequence_id", seq)
// Clean up active streams of peerings that were deleted from the state store.
// TODO(peering): This is going to trigger shutting down peerings we generated a token for. Is that OK?
for stream, doneCh := range connectedStreams {
if _, ok := stored[stream]; ok {
// Active stream is in the state store, nothing to do.
@ -298,7 +308,11 @@ func (s *Server) syncPeeringsAndBlock(ctx context.Context, logger hclog.Logger,
return merr.ErrorOrNil()
}
func (s *Server) establishStream(ctx context.Context, logger hclog.Logger, ws memdb.WatchSet, peer *pbpeering.Peering, cancelFns map[string]context.CancelFunc) error {
func (s *Server) establishStream(ctx context.Context,
logger hclog.Logger,
peer *pbpeering.Peering,
secret *pbpeering.PeeringSecrets,
cancelFns map[string]context.CancelFunc) error {
logger = logger.With("peer_name", peer.Name, "peer_id", peer.ID)
if peer.PeerID == "" {
@ -310,10 +324,6 @@ func (s *Server) establishStream(ctx context.Context, logger hclog.Logger, ws me
return fmt.Errorf("failed to build TLS dial option from peering: %w", err)
}
secret, err := s.fsm.State().PeeringSecretsRead(ws, peer.ID)
if err != nil {
return fmt.Errorf("failed to read secret for peering: %w", err)
}
if secret.GetStream().GetActiveSecretID() == "" {
return errors.New("missing stream secret for peering stream authorization, peering must be re-established")
}
@ -331,15 +341,21 @@ func (s *Server) establishStream(ctx context.Context, logger hclog.Logger, ws me
// Start a goroutine to watch for updates to peer server addresses.
// The latest valid server address can be received from nextServerAddr.
nextServerAddr := make(chan string)
go s.watchPeerServerAddrs(streamCtx, peer, nextServerAddr)
go s.watchAddresses(streamCtx, peer.ID, nextServerAddr)
// Establish a stream-specific retry so that retrying stream/conn errors isn't dependent on state store changes.
go retryLoopBackoffPeering(streamCtx, logger, func() error {
// Try a new address on each iteration by advancing the ring buffer on errors.
addr := <-nextServerAddr
addr, stillOpen := <-nextServerAddr
if !stillOpen {
// If the channel was closed that means the context was canceled, so we return.
return streamCtx.Err()
}
opts := []grpc.DialOption{
tlsOption,
// TODO(peering): Use a grpc.WithStatsHandler here.
// This should wait until the grpc-external server is wired up with a stats handler in NET-50.
// For keep alive parameters there is a larger comment in ClientConnPool.dial about that.
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: 30 * time.Second,
@ -349,7 +365,7 @@ func (s *Server) establishStream(ctx context.Context, logger hclog.Logger, ws me
}),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(50 * 1024 * 1024)),
}
// TODO(peering): use a grpc.WithStatsHandler here?)
logger.Trace("dialing peer", "addr", addr)
conn, err := grpc.DialContext(streamCtx, addr, opts...)
@ -400,83 +416,75 @@ func (s *Server) establishStream(ctx context.Context, logger hclog.Logger, ws me
}, func(err error) {
// TODO(peering): why are we using TrackSendError here? This could also be a receive error.
streamStatus.TrackSendError(err.Error())
if isErrCode(err, codes.FailedPrecondition) {
switch {
case isErrCode(err, codes.FailedPrecondition):
logger.Debug("stream disconnected due to 'failed precondition' error; reconnecting",
"error", err)
return
} else if isErrCode(err, codes.ResourceExhausted) {
case isErrCode(err, codes.ResourceExhausted):
logger.Debug("stream disconnected due to 'resource exhausted' error; reconnecting",
"error", err)
return
}
case errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded):
logger.Debug("stream context was canceled", "error", err)
case err != nil:
logger.Error("error managing peering stream", "error", err)
}
}, peeringRetryTimeout)
return nil
}
// watchPeerServerAddrs sends an up-to-date peer server address to nextServerAddr.
// It loads the server addresses into a ring buffer and cycles through them until:
// 1. streamCtx is cancelled (peer is deleted)
// 2. the peer is modified and the watchset fires.
// watchAddresses sends an up-to-date address to nextServerAddr.
// These could be either remote peer server addresses, or local mesh gateways.
// The function loads the addresses into a ring buffer and cycles through them until:
// 1. streamCtx is cancelled (peer is deleted or we're re-establishing the stream with new data)
// 2. the peer, Mesh config entry, or (optionally) mesh gateway address set is modified, and the watchset fires.
//
// In case (2) we refetch the peering and rebuild the ring buffer.
func (s *Server) watchPeerServerAddrs(ctx context.Context, peer *pbpeering.Peering, nextServerAddr chan<- string) {
// In case (2) we re-fetch all the data sources and rebuild the ring buffer.
// In the event that the PeerThroughMeshGateways is set in the Mesh entry, we front-load the ring buffer with
// local mesh gateway addresses, so we can try those first, with the option to fall back to remote server addresses.
func (s *Server) watchAddresses(ctx context.Context, peerID string, nextServerAddr chan<- string) {
defer close(nextServerAddr)
// we initialize the ring buffer with the peer passed to `establishStream`
// because the caller has pre-checked `peer.ShouldDial`, guaranteeing
// at least one server address.
//
// IMPORTANT: ringbuf must always be length > 0 or else `<-nextServerAddr` may block.
ringbuf := ring.New(len(peer.PeerServerAddresses))
for _, addr := range peer.PeerServerAddresses {
ringbuf.Value = addr
ringbuf = ringbuf.Next()
}
innerWs := memdb.NewWatchSet()
_, _, err := s.fsm.State().PeeringReadByID(innerWs, peer.ID)
if err != nil {
s.logger.Warn("failed to watch for changes to peer; server addresses may become stale over time.",
"peer_id", peer.ID,
"error", err)
}
var ringbuf *ring.Ring
var ws memdb.WatchSet
fetchAddrs := func() error {
// reinstantiate innerWs to prevent it from growing indefinitely
innerWs = memdb.NewWatchSet()
_, peering, err := s.fsm.State().PeeringReadByID(innerWs, peer.ID)
if err != nil {
return fmt.Errorf("failed to fetch peer %q: %w", peer.ID, err)
}
if !peering.IsActive() {
return fmt.Errorf("peer %q is no longer active", peer.ID)
}
if len(peering.PeerServerAddresses) == 0 {
return fmt.Errorf("peer %q has no addresses to dial", peer.ID)
}
fetchAddresses := func() error {
// Re-instantiate ws since it can only be watched once.
ws = memdb.NewWatchSet()
ringbuf = ring.New(len(peering.PeerServerAddresses))
for _, addr := range peering.PeerServerAddresses {
ringbuf.Value = addr
ringbuf = ringbuf.Next()
newRing, _, err := s.peeringBackend.GetDialAddresses(s.logger, ws, peerID)
if err != nil {
return fmt.Errorf("failed to fetch updated addresses to dial peer: %w", err)
}
ringbuf = newRing
return nil
}
// Initialize the first ring buffer.
if err := fetchAddresses(); err != nil {
s.logger.Warn("error fetching addresses", "peer_id", peerID, "error", err)
}
for {
select {
case nextServerAddr <- ringbuf.Value.(string):
ringbuf = ringbuf.Next()
case err := <-innerWs.WatchCh(ctx):
case err := <-ws.WatchCh(ctx):
if err != nil {
// context was cancelled
// Context was cancelled.
return
}
// watch fired so we refetch the peering and rebuild the ring buffer
if err := fetchAddrs(); err != nil {
s.logger.Warn("watchset for peer was fired but failed to update server addresses",
"peer_id", peer.ID,
// Watch fired so we re-fetch the necessary addresses and replace the ring buffer.
if err := fetchAddresses(); err != nil {
s.logger.Warn("watch for new addresses fired but the address list to dial may not have been updated",
"peer_id", peerID,
"error", err)
}
}

240
agent/consul/leader_peering_test.go
View File

@ -8,10 +8,12 @@ import (
"fmt"
"io/ioutil"
"math"
"net"
"testing"
"time"
"github.com/armon/go-metrics"
"github.com/google/tcpproxy"
msgpackrpc "github.com/hashicorp/consul-net-rpc/net-rpc-msgpackrpc"
"github.com/hashicorp/go-hclog"
"github.com/stretchr/testify/assert"
@ -567,7 +569,7 @@ func testLeader_PeeringSync_failsForTLSError(t *testing.T, tokenMutateFn func(to
}
// Since the Establish RPC dials the remote cluster, it will yield the TLS error.
ctx, cancel = context.WithTimeout(context.Background(), 3*time.Second)
ctx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
t.Cleanup(cancel)
_, err = s2Client.Establish(ctx, &establishReq)
require.Contains(t, err.Error(), expectErr)
@ -1861,3 +1863,239 @@ func Test_Leader_PeeringSync_ServerAddressUpdates(t *testing.T) {
})
})
}
func Test_Leader_PeeringSync_PeerThroughMeshGateways_ServerFallBack(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
ca := connect.TestCA(t, nil)
_, acceptor := testServerWithConfig(t, func(c *Config) {
c.NodeName = "acceptor"
c.Datacenter = "dc1"
c.TLSConfig.Domain = "consul"
c.GRPCTLSPort = freeport.GetOne(t)
c.CAConfig = &structs.CAConfiguration{
ClusterID: connect.TestClusterID,
Provider: structs.ConsulCAProvider,
Config: map[string]interface{}{
"PrivateKey": ca.SigningKey,
"RootCert": ca.RootCert,
},
}
})
testrpc.WaitForLeader(t, acceptor.RPC, "dc1")
// Create a peering by generating a token
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
conn, err := grpc.DialContext(ctx, acceptor.config.RPCAddr.String(),
grpc.WithContextDialer(newServerDialer(acceptor.config.RPCAddr.String())),
grpc.WithInsecure(),
grpc.WithBlock())
require.NoError(t, err)
defer conn.Close()
acceptorClient := pbpeering.NewPeeringServiceClient(conn)
req := pbpeering.GenerateTokenRequest{
PeerName: "my-peer-dialer",
}
resp, err := acceptorClient.GenerateToken(ctx, &req)
require.NoError(t, err)
// Bring up dialer and establish a peering with acceptor's token so that it attempts to dial.
_, dialer := testServerWithConfig(t, func(c *Config) {
c.NodeName = "dialer"
c.Datacenter = "dc2"
c.PrimaryDatacenter = "dc2"
})
testrpc.WaitForLeader(t, dialer.RPC, "dc2")
// Configure peering to go through mesh gateways
store := dialer.fsm.State()
require.NoError(t, store.EnsureConfigEntry(1, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: true,
},
}))
// Register a gateway that isn't actually listening.
require.NoError(t, store.EnsureRegistration(2, &structs.RegisterRequest{
ID: types.NodeID(testUUID()),
Node: "gateway-node-1",
Address: "127.0.0.1",
Service: &structs.NodeService{
Kind: structs.ServiceKindMeshGateway,
ID: "mesh-gateway-1",
Service: "mesh-gateway",
Port: freeport.GetOne(t),
},
}))
// Create a peering at dialer by establishing a peering with acceptor's token
ctx, cancel = context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
conn, err = grpc.DialContext(ctx, dialer.config.RPCAddr.String(),
grpc.WithContextDialer(newServerDialer(dialer.config.RPCAddr.String())),
grpc.WithInsecure(),
grpc.WithBlock())
require.NoError(t, err)
defer conn.Close()
dialerClient := pbpeering.NewPeeringServiceClient(conn)
establishReq := pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: resp.PeeringToken,
}
_, err = dialerClient.Establish(ctx, &establishReq)
require.NoError(t, err)
p, err := dialerClient.PeeringRead(ctx, &pbpeering.PeeringReadRequest{Name: "my-peer-acceptor"})
require.NoError(t, err)
// The peering should eventually connect because we fall back to the token's server addresses.
retry.Run(t, func(r *retry.R) {
status, found := dialer.peerStreamServer.StreamStatus(p.Peering.ID)
require.True(r, found)
require.True(r, status.Connected)
})
}
func Test_Leader_PeeringSync_PeerThroughMeshGateways_Success(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
ca := connect.TestCA(t, nil)
_, acceptor := testServerWithConfig(t, func(c *Config) {
c.NodeName = "acceptor"
c.Datacenter = "dc1"
c.TLSConfig.Domain = "consul"
c.GRPCTLSPort = freeport.GetOne(t)
c.CAConfig = &structs.CAConfiguration{
ClusterID: connect.TestClusterID,
Provider: structs.ConsulCAProvider,
Config: map[string]interface{}{
"PrivateKey": ca.SigningKey,
"RootCert": ca.RootCert,
},
}
})
testrpc.WaitForLeader(t, acceptor.RPC, "dc1")
// Create a peering by generating a token
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
conn, err := grpc.DialContext(ctx, acceptor.config.RPCAddr.String(),
grpc.WithContextDialer(newServerDialer(acceptor.config.RPCAddr.String())),
grpc.WithInsecure(),
grpc.WithBlock())
require.NoError(t, err)
defer conn.Close()
acceptorClient := pbpeering.NewPeeringServiceClient(conn)
req := pbpeering.GenerateTokenRequest{
PeerName: "my-peer-dialer",
}
resp, err := acceptorClient.GenerateToken(ctx, &req)
require.NoError(t, err)
// Bring up dialer and establish a peering with acceptor's token so that it attempts to dial.
_, dialer := testServerWithConfig(t, func(c *Config) {
c.NodeName = "dialer"
c.Datacenter = "dc2"
c.PrimaryDatacenter = "dc2"
})
testrpc.WaitForLeader(t, dialer.RPC, "dc2")
// Configure peering to go through mesh gateways
store := dialer.fsm.State()
require.NoError(t, store.EnsureConfigEntry(1, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: true,
},
}))
// Register a mesh gateway and a tcpproxy listening at its address.
gatewayPort := freeport.GetOne(t)
gatewayAddr := fmt.Sprintf("127.0.0.1:%d", gatewayPort)
require.NoError(t, store.EnsureRegistration(3, &structs.RegisterRequest{
ID: types.NodeID(testUUID()),
Node: "gateway-node-2",
Address: "127.0.0.1",
Service: &structs.NodeService{
Kind: structs.ServiceKindMeshGateway,
ID: "mesh-gateway-2",
Service: "mesh-gateway",
Port: gatewayPort,
},
}))
// Configure a TCP proxy with an SNI route corresponding to the acceptor cluster.
var proxy tcpproxy.Proxy
target := &connWrapper{
proxy: tcpproxy.DialProxy{
Addr: fmt.Sprintf("127.0.0.1:%d", acceptor.config.GRPCTLSPort),
},
}
proxy.AddSNIRoute(gatewayAddr, "server.dc1.peering.11111111-2222-3333-4444-555555555555.consul", target)
proxy.AddStopACMESearch(gatewayAddr)
require.NoError(t, proxy.Start())
t.Cleanup(func() {
proxy.Close()
proxy.Wait()
})
// Create a peering at dialer by establishing a peering with acceptor's token
ctx, cancel = context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
conn, err = grpc.DialContext(ctx, dialer.config.RPCAddr.String(),
grpc.WithContextDialer(newServerDialer(dialer.config.RPCAddr.String())),
grpc.WithInsecure(),
grpc.WithBlock())
require.NoError(t, err)
defer conn.Close()
dialerClient := pbpeering.NewPeeringServiceClient(conn)
establishReq := pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: resp.PeeringToken,
}
_, err = dialerClient.Establish(ctx, &establishReq)
require.NoError(t, err)
p, err := dialerClient.PeeringRead(ctx, &pbpeering.PeeringReadRequest{Name: "my-peer-acceptor"})
require.NoError(t, err)
// The peering should eventually connect through the gateway address.
retry.Run(t, func(r *retry.R) {
status, found := dialer.peerStreamServer.StreamStatus(p.Peering.ID)
require.True(r, found)
require.True(r, status.Connected)
})
// target.called is true when the tcproxy's conn handler was invoked.
// This lets us know that the "Establish" success flowed through the proxy masquerading as a gateway.
require.True(t, target.called)
}
// connWrapper is a wrapper around tcpproxy.DialProxy to enable tracking whether the proxy handled a connection.
type connWrapper struct {
proxy tcpproxy.DialProxy
called bool
}
func (w *connWrapper) HandleConn(src net.Conn) {
w.called = true
w.proxy.HandleConn(src)
}

115
agent/consul/peering_backend.go
View File

@ -1,12 +1,16 @@
package consul
import (
"container/ring"
"encoding/base64"
"encoding/json"
"fmt"
"strconv"
"sync"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/go-memdb"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/acl/resolver"
"github.com/hashicorp/consul/agent/connect"
@ -85,29 +89,114 @@ func (b *PeeringBackend) GetTLSMaterials(generatingToken bool) (string, []string
return serverName, caPems, nil
}
// GetServerAddresses looks up server or mesh gateway addresses from the state store.
func (b *PeeringBackend) GetServerAddresses() ([]string, error) {
_, rawEntry, err := b.srv.fsm.State().ConfigEntry(nil, structs.MeshConfig, structs.MeshConfigMesh, acl.DefaultEnterpriseMeta())
if err != nil {
return nil, fmt.Errorf("failed to read mesh config entry: %w", err)
}
// GetLocalServerAddresses looks up server or mesh gateway addresses from the state store for a peer to dial.
func (b *PeeringBackend) GetLocalServerAddresses() ([]string, error) {
store := b.srv.fsm.State()
meshConfig, ok := rawEntry.(*structs.MeshConfigEntry)
if ok && meshConfig.Peering != nil && meshConfig.Peering.PeerThroughMeshGateways {
return meshGatewayAdresses(b.srv.fsm.State())
useGateways, err := b.PeerThroughMeshGateways(nil)
if err != nil {
// For inbound traffic we prefer to fail fast if we can't determine whether we should peer through MGW.
// This prevents unexpectedly sharing local server addresses when a user only intended to peer through gateways.
return nil, fmt.Errorf("failed to determine if peering should happen through mesh gateways: %w", err)
}
return serverAddresses(b.srv.fsm.State())
if useGateways {
return meshGatewayAdresses(store, nil, true)
}
return serverAddresses(store)
}
func meshGatewayAdresses(state *state.Store) ([]string, error) {
_, nodes, err := state.ServiceDump(nil, structs.ServiceKindMeshGateway, true, acl.DefaultEnterpriseMeta(), structs.DefaultPeerKeyword)
// GetDialAddresses returns: the addresses to cycle through when dialing a peer's servers,
// a boolean indicating whether mesh gateways are present, and an optional error.
// The resulting ring buffer is front-loaded with the local mesh gateway addresses if they are present.
func (b *PeeringBackend) GetDialAddresses(logger hclog.Logger, ws memdb.WatchSet, peerID string) (*ring.Ring, bool, error) {
newRing, err := b.fetchPeerServerAddresses(ws, peerID)
if err != nil {
return nil, false, fmt.Errorf("failed to refresh peer server addresses, will continue to use initial addresses: %w", err)
}
gatewayRing, err := b.maybeFetchGatewayAddresses(ws)
if err != nil {
// If we couldn't fetch the mesh gateway addresses we fall back to dialing the remote server addresses.
logger.Warn("failed to refresh local gateway addresses, will attempt to dial peer directly: %w", "error", err)
return newRing, false, nil
}
if gatewayRing != nil {
// The ordering is important here. We always want to start with the mesh gateway
// addresses and fallback to the remote addresses, so we append the server addresses
// in newRing to gatewayRing.
newRing = gatewayRing.Link(newRing)
}
return newRing, gatewayRing != nil, nil
}
// fetchPeerServerAddresses will return a ring buffer with the latest peer server addresses.
// If the peering is no longer active or does not have addresses, then we return an error.
func (b *PeeringBackend) fetchPeerServerAddresses(ws memdb.WatchSet, peerID string) (*ring.Ring, error) {
_, peering, err := b.Store().PeeringReadByID(ws, peerID)
if err != nil {
return nil, fmt.Errorf("failed to fetch peer %q: %w", peerID, err)
}
if !peering.IsActive() {
return nil, fmt.Errorf("there is no active peering for %q", peerID)
}
return bufferFromAddresses(peering.PeerServerAddresses)
}
// maybeFetchGatewayAddresses will return a ring buffer with the latest gateway addresses if the
// local datacenter is configured to peer through mesh gateways and there are local gateways registered.
// If neither of these are true then we return a nil buffer.
func (b *PeeringBackend) maybeFetchGatewayAddresses(ws memdb.WatchSet) (*ring.Ring, error) {
useGateways, err := b.PeerThroughMeshGateways(ws)
if err != nil {
return nil, fmt.Errorf("failed to determine if peering should happen through mesh gateways: %w", err)
}
if useGateways {
addresses, err := meshGatewayAdresses(b.srv.fsm.State(), ws, false)
if err != nil {
return nil, fmt.Errorf("error fetching local mesh gateway addresses: %w", err)
}
return bufferFromAddresses(addresses)
}
return nil, nil
}
// PeerThroughMeshGateways determines if the config entry to enable peering control plane
// traffic through a mesh gateway is set to enable.
func (b *PeeringBackend) PeerThroughMeshGateways(ws memdb.WatchSet) (bool, error) {
_, rawEntry, err := b.srv.fsm.State().ConfigEntry(ws, structs.MeshConfig, structs.MeshConfigMesh, acl.DefaultEnterpriseMeta())
if err != nil {
return false, fmt.Errorf("failed to read mesh config entry: %w", err)
}
mesh, ok := rawEntry.(*structs.MeshConfigEntry)
if rawEntry != nil && !ok {
return false, fmt.Errorf("got unexpected type for mesh config entry: %T", rawEntry)
}
return mesh.PeerThroughMeshGateways(), nil
}
func bufferFromAddresses(addresses []string) (*ring.Ring, error) {
// IMPORTANT: The address ring buffer must always be length > 0
if len(addresses) == 0 {
return nil, fmt.Errorf("no known addresses")
}
ring := ring.New(len(addresses))
for _, addr := range addresses {
ring.Value = addr
ring = ring.Next()
}
return ring, nil
}
func meshGatewayAdresses(state *state.Store, ws memdb.WatchSet, wan bool) ([]string, error) {
_, nodes, err := state.ServiceDump(ws, structs.ServiceKindMeshGateway, true, acl.DefaultEnterpriseMeta(), structs.DefaultPeerKeyword)
if err != nil {
return nil, fmt.Errorf("failed to dump gateway addresses: %w", err)
}
var addrs []string
for _, node := range nodes {
_, addr, port := node.BestAddress(true)
_, addr, port := node.BestAddress(wan)
addrs = append(addrs, ipaddr.FormatAddressPort(addr, port))
}
if len(addrs) == 0 {

220
agent/consul/peering_backend_test.go
View File

@ -10,6 +10,7 @@ import (
gogrpc "google.golang.org/grpc"
"github.com/hashicorp/consul/agent/connect"
"github.com/hashicorp/consul/agent/consul/state"
"github.com/hashicorp/consul/agent/pool"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/proto/pbpeering"
@ -76,7 +77,7 @@ func TestPeeringBackend_ForwardToLeader(t *testing.T) {
})
}
func TestPeeringBackend_GetServerAddresses(t *testing.T) {
func TestPeeringBackend_GetLocalServerAddresses(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
@ -91,7 +92,7 @@ func TestPeeringBackend_GetServerAddresses(t *testing.T) {
backend := NewPeeringBackend(srv)
testutil.RunStep(t, "peer to servers", func(t *testing.T) {
addrs, err := backend.GetServerAddresses()
addrs, err := backend.GetLocalServerAddresses()
require.NoError(t, err)
expect := fmt.Sprintf("127.0.0.1:%d", srv.config.GRPCTLSPort)
@ -107,7 +108,7 @@ func TestPeeringBackend_GetServerAddresses(t *testing.T) {
}
require.NoError(t, srv.fsm.State().EnsureConfigEntry(1, &mesh))
addrs, err := backend.GetServerAddresses()
addrs, err := backend.GetLocalServerAddresses()
require.NoError(t, err)
// Still expect server address because PeerThroughMeshGateways was not enabled.
@ -121,7 +122,7 @@ func TestPeeringBackend_GetServerAddresses(t *testing.T) {
}
require.NoError(t, srv.fsm.State().EnsureConfigEntry(1, &mesh))
addrs, err := backend.GetServerAddresses()
addrs, err := backend.GetLocalServerAddresses()
require.Nil(t, addrs)
testutil.RequireErrorContains(t, err,
"servers are configured to PeerThroughMeshGateways, but no mesh gateway instances are registered")
@ -147,12 +148,221 @@ func TestPeeringBackend_GetServerAddresses(t *testing.T) {
}
require.NoError(t, srv.fsm.State().EnsureRegistration(2, &reg))
addrs, err := backend.GetServerAddresses()
addrs, err := backend.GetLocalServerAddresses()
require.NoError(t, err)
require.Equal(t, []string{"154.238.12.252:8443"}, addrs)
})
}
func TestPeeringBackend_GetDialAddresses(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
_, cfg := testServerConfig(t)
cfg.GRPCTLSPort = freeport.GetOne(t)
srv, err := newServer(t, cfg)
require.NoError(t, err)
testrpc.WaitForLeader(t, srv.RPC, "dc1")
backend := NewPeeringBackend(srv)
dialerPeerID := testUUID()
acceptorPeerID := testUUID()
type expectation struct {
addrs []string
haveGateways bool
err string
}
type testCase struct {
name string
setup func(store *state.Store)
peerID string
expect expectation
}
run := func(t *testing.T, tc testCase) {
if tc.setup != nil {
tc.setup(srv.fsm.State())
}
ring, haveGateways, err := backend.GetDialAddresses(testutil.Logger(t), nil, tc.peerID)
if tc.expect.err != "" {
testutil.RequireErrorContains(t, err, tc.expect.err)
return
}
require.Equal(t, tc.expect.haveGateways, haveGateways)
require.NotNil(t, ring)
var addrs []string
ring.Do(func(value any) {
addr, ok := value.(string)
require.True(t, ok)
addrs = append(addrs, addr)
})
require.Equal(t, tc.expect.addrs, addrs)
}
// NOTE: The following tests are set up to run serially with RunStep to save on the setup/teardown cost for a test server.
tt := []testCase{
{
name: "unknown peering",
setup: func(store *state.Store) {
// Test peering is not written during setup
},
peerID: acceptorPeerID,
expect: expectation{
err: fmt.Sprintf(`there is no active peering for %q`, acceptorPeerID),
},
},
{
name: "no server addresses",
setup: func(store *state.Store) {
require.NoError(t, store.PeeringWrite(1, &pbpeering.PeeringWriteRequest{
Peering: &pbpeering.Peering{
Name: "acceptor",
ID: acceptorPeerID,
// Acceptor peers do not have PeerServerAddresses populated locally.
},
}))
},
peerID: acceptorPeerID,
expect: expectation{
err: "no known addresses",
},
},
{
name: "only server addrs are returned when mesh config does not exist",
setup: func(store *state.Store) {
require.NoError(t, store.PeeringWrite(2, &pbpeering.PeeringWriteRequest{
Peering: &pbpeering.Peering{
Name: "dialer",
ID: dialerPeerID,
PeerServerAddresses: []string{"1.2.3.4:8502", "2.3.4.5:8503"},
},
}))
// Mesh config entry does not exist
},
peerID: dialerPeerID,
expect: expectation{
haveGateways: false,
addrs: []string{"1.2.3.4:8502", "2.3.4.5:8503"},
},
},
{
name: "only server addrs are returned when not peering through gateways",
setup: func(store *state.Store) {
require.NoError(t, srv.fsm.State().EnsureConfigEntry(3, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: false, // Peering through gateways is not enabled
},
}))
},
peerID: dialerPeerID,
expect: expectation{
haveGateways: false,
addrs: []string{"1.2.3.4:8502", "2.3.4.5:8503"},
},
},
{
name: "only server addrs are returned when peering through gateways without gateways registered",
setup: func(store *state.Store) {
require.NoError(t, srv.fsm.State().EnsureConfigEntry(4, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: true,
},
}))
// No gateways are registered
},
peerID: dialerPeerID,
expect: expectation{
haveGateways: false,
// Fall back to remote server addresses
addrs: []string{"1.2.3.4:8502", "2.3.4.5:8503"},
},
},
{
name: "gateway addresses are included after gateways are registered",
setup: func(store *state.Store) {
require.NoError(t, srv.fsm.State().EnsureRegistration(5, &structs.RegisterRequest{
ID: types.NodeID(testUUID()),
Node: "gateway-node-1",
Address: "5.6.7.8",
Service: &structs.NodeService{
Kind: structs.ServiceKindMeshGateway,
ID: "mesh-gateway-1",
Service: "mesh-gateway",
Port: 8443,
TaggedAddresses: map[string]structs.ServiceAddress{
structs.TaggedAddressWAN: {
Address: "my-lb-addr.not-aws.com",
Port: 443,
},
},
},
}))
require.NoError(t, srv.fsm.State().EnsureRegistration(6, &structs.RegisterRequest{
ID: types.NodeID(testUUID()),
Node: "gateway-node-2",
Address: "6.7.8.9",
Service: &structs.NodeService{
Kind: structs.ServiceKindMeshGateway,
ID: "mesh-gateway-2",
Service: "mesh-gateway",
Port: 8443,
TaggedAddresses: map[string]structs.ServiceAddress{
structs.TaggedAddressWAN: {
Address: "my-other-lb-addr.not-aws.com",
Port: 443,
},
},
},
}))
},
peerID: dialerPeerID,
expect: expectation{
haveGateways: true,
// Gateways come first, and we use their LAN addresses since this is for outbound communication.
addrs: []string{"6.7.8.9:8443", "5.6.7.8:8443", "1.2.3.4:8502", "2.3.4.5:8503"},
},
},
{
name: "addresses are not returned if the peering is deleted",
setup: func(store *state.Store) {
require.NoError(t, store.PeeringWrite(5, &pbpeering.PeeringWriteRequest{
Peering: &pbpeering.Peering{
Name: "dialer",
ID: dialerPeerID,
PeerServerAddresses: []string{"1.2.3.4:8502", "2.3.4.5:8503"},
// Mark as deleted
State: pbpeering.PeeringState_DELETING,
DeletedAt: structs.TimeToProto(time.Now()),
},
}))
},
peerID: dialerPeerID,
expect: expectation{
err: fmt.Sprintf(`there is no active peering for %q`, dialerPeerID),
},
},
}
for _, tc := range tt {
testutil.RunStep(t, tc.name, func(t *testing.T) {
run(t, tc)
})
}
}
func newServerDialer(serverAddr string) func(context.Context, string) (net.Conn, error) {
return func(ctx context.Context, addr string) (net.Conn, error) {
d := net.Dialer{}

2
agent/grpc-external/services/peerstream/stream_resources.go
View File

@ -709,7 +709,7 @@ func getTrustDomain(store StateStore, logger hclog.Logger) (string, error) {
return "", grpcstatus.Error(codes.Internal, "failed to read Connect CA Config")
case cfg == nil:
logger.Warn("cannot begin stream because Connect CA is not yet initialized")
return "", grpcstatus.Error(codes.FailedPrecondition, "Connect CA is not yet initialized")
return "", grpcstatus.Error(codes.Unavailable, "Connect CA is not yet initialized")
}
return connect.SpiffeIDSigningForCluster(cfg.ClusterID).Host(), nil
}

3
agent/proxycfg/mesh_gateway.go
View File

@ -9,6 +9,7 @@ import (
"strings"
"time"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/go-hclog"
cachetype "github.com/hashicorp/consul/agent/cache-types"
@ -564,7 +565,7 @@ func (s *handlerMeshGateway) handleUpdate(ctx context.Context, u UpdateEvent, sn
peeringListCtx, cancel := context.WithCancel(ctx)
err := s.dataSources.PeeringList.Notify(peeringListCtx, &cachetype.PeeringListRequest{
Request: &pbpeering.PeeringListRequest{
Partition: structs.WildcardSpecifier,
Partition: acl.WildcardPartitionName,
},
}, peerServersWatchID, s.ch)
if err != nil {

2
agent/proxycfg/state_test.go
View File

@ -247,7 +247,7 @@ func genVerifyPeeringListWatchForMeshGateway() verifyWatchRequest {
return func(t testing.TB, request any) {
reqReal, ok := request.(*cachetype.PeeringListRequest)
require.True(t, ok)
require.Equal(t, structs.WildcardSpecifier, reqReal.Request.Partition)
require.Equal(t, acl.WildcardPartitionName, reqReal.Request.Partition)
}
}

135
agent/rpc/peering/service.go
View File

@ -1,6 +1,7 @@
package peering
import (
"container/ring"
"context"
"errors"
"fmt"
@ -8,6 +9,7 @@ import (
"time"
"github.com/armon/go-metrics"
"github.com/hashicorp/consul/lib/retry"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/go-memdb"
"github.com/hashicorp/go-multierror"
@ -36,6 +38,15 @@ var (
errPeeringTokenEmptyPeerID = errors.New("peering token peer ID value is empty")
)
const (
// meshGatewayWait is the initial wait on calls to exchange a secret with a peer when dialing through a gateway.
// This wait provides some time for the first gateway address to configure a route to the peer servers.
// Why 350ms? That is roughly the p50 latency we observed in a scale test for proxy config propagation:
// https://www.hashicorp.com/cgsb
meshGatewayWait = 350 * time.Millisecond
establishmentTimeout = 5 * time.Second
)
// errPeeringInvalidServerAddress is returned when an establish request contains
// an invalid server address.
type errPeeringInvalidServerAddress struct {
@ -118,9 +129,9 @@ type Backend interface {
// It returns the server name to validate, and the CA certificate to validate with.
GetTLSMaterials(generatingToken bool) (string, []string, error)
// GetServerAddresses returns the addresses used for establishing a peering connection.
// GetLocalServerAddresses returns the addresses used for establishing a peering connection.
// These may be server addresses or mesh gateway addresses if peering through mesh gateways.
GetServerAddresses() ([]string, error)
GetLocalServerAddresses() ([]string, error)
// EncodeToken packages a peering token into a slice of bytes.
EncodeToken(tok *structs.PeeringToken) ([]byte, error)
@ -128,6 +139,12 @@ type Backend interface {
// DecodeToken unpackages a peering token from a slice of bytes.
DecodeToken([]byte) (*structs.PeeringToken, error)
// GetDialAddresses returns: the addresses to cycle through when dialing a peer's servers,
// a boolean indicating whether mesh gateways are present, and an optional error.
// The resulting ring buffer is front-loaded with the local mesh gateway addresses if the local
// datacenter is configured to dial through mesh gateways.
GetDialAddresses(logger hclog.Logger, ws memdb.WatchSet, peerID string) (*ring.Ring, bool, error)
EnterpriseCheckPartitions(partition string) error
EnterpriseCheckNamespaces(namespace string) error
@ -298,7 +315,7 @@ func (s *Server) GenerateToken(
if len(req.ServerExternalAddresses) > 0 {
serverAddrs = req.ServerExternalAddresses
} else {
serverAddrs, err = s.Backend.GetServerAddresses()
serverAddrs, err = s.Backend.GetLocalServerAddresses()
if err != nil {
return nil, err
}
@ -419,7 +436,13 @@ func (s *Server) Establish(
PeerServerName: tok.ServerName,
PeerID: tok.PeerID,
Meta: req.Meta,
State: pbpeering.PeeringState_ESTABLISHING,
// State is intentionally not set until after the secret exchange succeeds.
// This is to prevent a scenario where an active peering is re-established,
// the secret exchange fails, and the peering state gets stuck in "Establishing"
// while the original connection is still active.
// State: pbpeering.PeeringState_ESTABLISHING,
// PartitionOrEmpty is used to avoid writing "default" in OSS.
Partition: entMeta.PartitionOrEmpty(),
Remote: &pbpeering.RemoteInfo{
@ -428,39 +451,30 @@ func (s *Server) Establish(
},
}
tlsOption, err := peering.TLSDialOption()
if err != nil {
return nil, fmt.Errorf("failed to build TLS dial option from peering: %w", err)
// Write the peering ahead of the ExchangeSecret handshake to give
// mesh gateways in the default partition an opportunity
// to update their config with an outbound route to this peer server.
//
// If the request to exchange a secret fails then the peering will continue to exist.
// We do not undo this write because this call to establish may actually be a re-establish call
// for an active peering.
writeReq := &pbpeering.PeeringWriteRequest{
Peering: peering,
}
if err := s.Backend.PeeringWrite(writeReq); err != nil {
return nil, fmt.Errorf("failed to write peering: %w", err)
}
exchangeReq := pbpeerstream.ExchangeSecretRequest{
PeerID: peering.PeerID,
EstablishmentSecret: tok.EstablishmentSecret,
}
var exchangeResp *pbpeerstream.ExchangeSecretResponse
// Loop through the known server addresses once, attempting to fetch the long-lived stream secret.
var dialErrors error
for _, addr := range serverAddrs {
exchangeResp, err = exchangeSecret(ctx, addr, tlsOption, &exchangeReq)
if err != nil {
dialErrors = multierror.Append(dialErrors, fmt.Errorf("failed to exchange peering secret with %q: %w", addr, err))
}
if exchangeResp != nil {
break
}
}
exchangeResp, dialErrors := s.exchangeSecret(ctx, peering, tok.EstablishmentSecret)
if exchangeResp == nil {
return nil, dialErrors
}
peering.State = pbpeering.PeeringState_ESTABLISHING
// As soon as a peering is written with a non-empty list of ServerAddresses
// and an active stream secret, a leader routine will see the peering and
// attempt to establish a peering stream with the remote peer.
//
// This peer now has a record of both the LocalPeerID(ID) and
// RemotePeerID(PeerID) but at this point the other peer does not.
writeReq := &pbpeering.PeeringWriteRequest{
writeReq = &pbpeering.PeeringWriteRequest{
Peering: peering,
SecretsRequest: &pbpeering.SecretsWriteRequest{
PeerID: peering.ID,
@ -474,7 +488,6 @@ func (s *Server) Establish(
if err := s.Backend.PeeringWrite(writeReq); err != nil {
return nil, fmt.Errorf("failed to write peering: %w", err)
}
// TODO(peering): low prio: consider adding response details
return resp, nil
}
@ -493,8 +506,46 @@ func (s *Server) validatePeeringLocality(token *structs.PeeringToken) error {
return nil
}
func exchangeSecret(ctx context.Context, addr string, tlsOption grpc.DialOption, req *pbpeerstream.ExchangeSecretRequest) (*pbpeerstream.ExchangeSecretResponse, error) {
dialCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
// exchangeSecret will continuously attempt to exchange the given establishment secret with the peer, up to a timeout.
// This function will attempt to dial through mesh gateways if the local DC is configured to peer through gateways,
// but will fall back to server addresses if not.
func (s *Server) exchangeSecret(ctx context.Context, peering *pbpeering.Peering, establishmentSecret string) (*pbpeerstream.ExchangeSecretResponse, error) {
req := pbpeerstream.ExchangeSecretRequest{
PeerID: peering.PeerID,
EstablishmentSecret: establishmentSecret,
}
tlsOption, err := peering.TLSDialOption()
if err != nil {
return nil, fmt.Errorf("failed to build TLS dial option from peering: %w", err)
}
ringBuf, usingGateways, err := s.Backend.GetDialAddresses(s.Logger, nil, peering.ID)
if err != nil {
return nil, fmt.Errorf("failed to get addresses to dial peer: %w", err)
}
var (
resp *pbpeerstream.ExchangeSecretResponse
dialErrors error
)
retryWait := 150 * time.Millisecond
jitter := retry.NewJitter(25)
if usingGateways {
// If we are dialing through local gateways we sleep before issuing the first request.
// This gives the local gateways some time to configure a route to the peer servers.
time.Sleep(meshGatewayWait)
}
retryCtx, cancel := context.WithTimeout(ctx, establishmentTimeout)
defer cancel()
for retryCtx.Err() == nil {
addr := ringBuf.Value.(string)
dialCtx, cancel := context.WithTimeout(ctx, 2*time.Second)
defer cancel()
conn, err := grpc.DialContext(dialCtx, addr,
@ -506,7 +557,27 @@ func exchangeSecret(ctx context.Context, addr string, tlsOption grpc.DialOption,
defer conn.Close()
client := pbpeerstream.NewPeerStreamServiceClient(conn)
return client.ExchangeSecret(ctx, req)
resp, err = client.ExchangeSecret(ctx, &req)
// If we got a permission denied error that means out establishment secret is invalid, so we do not retry.
grpcErr, ok := grpcstatus.FromError(err)
if ok && grpcErr.Code() == codes.PermissionDenied {
return nil, fmt.Errorf("a new peering token must be generated: %w", grpcErr.Err())
}
if err != nil {
dialErrors = multierror.Append(dialErrors, fmt.Errorf("failed to exchange peering secret through address %q: %w", addr, err))
}
if resp != nil {
// Got a valid response. We're done.
break
}
time.Sleep(jitter(retryWait))
// Cycle to the next possible address.
ringBuf = ringBuf.Next()
}
return resp, dialErrors
}
// OPTIMIZE: Handle blocking queries

183
agent/rpc/peering/service_test.go
View File

@ -12,6 +12,7 @@ import (
"testing"
"time"
"github.com/google/tcpproxy"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/go-uuid"
"github.com/stretchr/testify/require"
@ -476,6 +477,188 @@ func TestPeeringService_Establish(t *testing.T) {
})
}
func TestPeeringService_Establish_ThroughMeshGateway(t *testing.T) {
// This test is timing-sensitive, must not be run in parallel.
// t.Parallel()
acceptor := newTestServer(t, func(conf *consul.Config) {
conf.NodeName = "acceptor"
})
acceptorClient := pbpeering.NewPeeringServiceClient(acceptor.ClientConn(t))
dialer := newTestServer(t, func(conf *consul.Config) {
conf.NodeName = "dialer"
conf.Datacenter = "dc2"
conf.PrimaryDatacenter = "dc2"
})
dialerClient := pbpeering.NewPeeringServiceClient(dialer.ClientConn(t))
var peeringToken string
testutil.RunStep(t, "retry until timeout on dial errors", func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
t.Cleanup(cancel)
testToken := structs.PeeringToken{
ServerAddresses: []string{fmt.Sprintf("127.0.0.1:%d", freeport.GetOne(t))},
PeerID: testUUID(t),
}
testTokenJSON, _ := json.Marshal(&testToken)
testTokenB64 := base64.StdEncoding.EncodeToString(testTokenJSON)
start := time.Now()
_, err := dialerClient.Establish(ctx, &pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: testTokenB64,
})
require.Error(t, err)
testutil.RequireErrorContains(t, err, "connection refused")
require.Greater(t, time.Since(start), 5*time.Second)
})
testutil.RunStep(t, "peering can be established from token", func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
// Generate a peering token for dialer
tokenResp, err := acceptorClient.GenerateToken(ctx, &pbpeering.GenerateTokenRequest{PeerName: "my-peer-dialer"})
require.NoError(t, err)
// Capture peering token for re-use later
peeringToken = tokenResp.PeeringToken
// The context timeout is short, it checks that we do not wait the 350ms that we do when peering through mesh gateways
ctx, cancel = context.WithTimeout(context.Background(), 300*time.Millisecond)
t.Cleanup(cancel)
_, err = dialerClient.Establish(ctx, &pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: tokenResp.PeeringToken,
})
require.NoError(t, err)
})
testutil.RunStep(t, "fail fast on permission denied", func(t *testing.T) {
// This test case re-uses the previous token since the establishment secret will have been invalidated.
// The context timeout is short, it checks that we do not retry.
ctx, cancel := context.WithTimeout(context.Background(), 300*time.Millisecond)
t.Cleanup(cancel)
_, err := dialerClient.Establish(ctx, &pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: peeringToken,
})
testutil.RequireErrorContains(t, err, "a new peering token must be generated")
})
gatewayPort := freeport.GetOne(t)
testutil.RunStep(t, "fail past bad mesh gateway", func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
t.Cleanup(cancel)
// Generate a new peering token for the dialer.
tokenResp, err := acceptorClient.GenerateToken(ctx, &pbpeering.GenerateTokenRequest{PeerName: "my-peer-dialer"})
require.NoError(t, err)
store := dialer.Server.FSM().State()
require.NoError(t, store.EnsureConfigEntry(1, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: true,
},
}))
// Register a gateway that isn't actually listening.
require.NoError(t, store.EnsureRegistration(2, &structs.RegisterRequest{
ID: types.NodeID(testUUID(t)),
Node: "gateway-node-1",
Address: "127.0.0.1",
Service: &structs.NodeService{
Kind: structs.ServiceKindMeshGateway,
ID: "mesh-gateway-1",
Service: "mesh-gateway",
Port: gatewayPort,
},
}))
ctx, cancel = context.WithTimeout(context.Background(), 3*time.Second)
t.Cleanup(cancel)
// Call to establish should succeed when we fall back to remote server address.
_, err = dialerClient.Establish(ctx, &pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: tokenResp.PeeringToken,
})
require.NoError(t, err)
})
testutil.RunStep(t, "route through gateway", func(t *testing.T) {
// Spin up a proxy listening at the gateway port registered above.
gatewayAddr := fmt.Sprintf("127.0.0.1:%d", gatewayPort)
// Configure a TCP proxy with an SNI route corresponding to the acceptor cluster.
var proxy tcpproxy.Proxy
target := &connWrapper{
proxy: tcpproxy.DialProxy{
Addr: acceptor.PublicGRPCAddr,
},
}
proxy.AddSNIRoute(gatewayAddr, "server.dc1.peering.11111111-2222-3333-4444-555555555555.consul", target)
proxy.AddStopACMESearch(gatewayAddr)
require.NoError(t, proxy.Start())
t.Cleanup(func() {
proxy.Close()
proxy.Wait()
})
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
t.Cleanup(cancel)
// Generate a new peering token for the dialer.
tokenResp, err := acceptorClient.GenerateToken(ctx, &pbpeering.GenerateTokenRequest{PeerName: "my-peer-dialer"})
require.NoError(t, err)
store := dialer.Server.FSM().State()
require.NoError(t, store.EnsureConfigEntry(1, &structs.MeshConfigEntry{
Peering: &structs.PeeringMeshConfig{
PeerThroughMeshGateways: true,
},
}))
ctx, cancel = context.WithTimeout(context.Background(), 1*time.Second)
t.Cleanup(cancel)
start := time.Now()
// Call to establish should succeed through the proxy.
_, err = dialerClient.Establish(ctx, &pbpeering.EstablishRequest{
PeerName: "my-peer-acceptor",
PeeringToken: tokenResp.PeeringToken,
})
require.NoError(t, err)
// Dialing through a gateway is preceded by a mandatory 350ms sleep.
require.Greater(t, time.Since(start), 350*time.Millisecond)
// target.called is true when the tcproxy's conn handler was invoked.
// This lets us know that the "Establish" success flowed through the proxy masquerading as a gateway.
require.True(t, target.called)
})
}
// connWrapper is a wrapper around tcpproxy.DialProxy to enable tracking whether the proxy handled a connection.
type connWrapper struct {
proxy tcpproxy.DialProxy
called bool
}
func (w *connWrapper) HandleConn(src net.Conn) {
w.called = true
w.proxy.HandleConn(src)
}
func TestPeeringService_Establish_ACLEnforcement(t *testing.T) {
validToken := peering.TestPeeringToken("83474a06-cca4-4ff4-99a4-4152929c8160")
validTokenJSON, _ := json.Marshal(&validToken)

5
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/base.hcl Normal file
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primary_datacenter = "alpha"
log_level = "trace"
peering {
enabled = true
}

32
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/config_entries.hcl Normal file
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config_entries {
bootstrap = [
{
kind = "proxy-defaults"
name = "global"
config {
protocol = "tcp"
}
},
{
kind = "mesh"
peering {
peer_through_mesh_gateways = true
}
},
{
kind = "exported-services"
name = "default"
services = [
{
name = "s2"
consumers = [
{
peer = "alpha-to-primary"
}
]
}
]
}
]
}

5
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/service_gateway.hcl Normal file
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services {
name = "mesh-gateway"
kind = "mesh-gateway"
port = 4432
}

1
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/service_s1.hcl Normal file
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# We don't want an s1 service in this peer

7
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/service_s2.hcl Normal file
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services {
name = "s2"
port = 8181
connect {
sidecar_service {}
}
}

12
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/setup.sh Normal file
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#!/bin/bash
set -euo pipefail
register_services alpha
gen_envoy_bootstrap s2 19002 alpha
gen_envoy_bootstrap mesh-gateway 19003 alpha true
wait_for_config_entry proxy-defaults global alpha
wait_for_config_entry exported-services default alpha
wait_for_config_entry mesh mesh alpha

49
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/alpha/verify.bats Normal file
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#!/usr/bin/env bats
load helpers
@test "s2 proxy is running correct version" {
assert_envoy_version 19002
}
@test "s2 proxy admin is up on :19002" {
retry_default curl -f -s localhost:19002/stats -o /dev/null
}
@test "gateway-alpha proxy admin is up on :19003" {
retry_default curl -f -s localhost:19003/stats -o /dev/null
}
@test "s2 proxy listener should be up and have right cert" {
assert_proxy_presents_cert_uri localhost:21000 s2 alpha
}
@test "s2 proxy should be healthy" {
assert_service_has_healthy_instances s2 1 alpha
}
@test "gateway-alpha should be up and listening" {
retry_long nc -z consul-alpha-client:4432
}
@test "s2 proxies should be healthy" {
assert_service_has_healthy_instances s2 1 alpha
}
@test "dialer gateway-alpha should have healthy endpoints for alpha servers" {
assert_upstream_has_endpoints_in_status 127.0.0.1:19003 server.alpha.peering HEALTHY 1
}
@test "dialer gateway-alpha should have healthy endpoints for primary servers" {
assert_upstream_has_endpoints_in_status 127.0.0.1:19003 server.primary.peering HEALTHY 1
}
# Re-peering the clusters is a way to have alpha dial out through its own gateway
# since we know it is configured with endpoints for primary from the first time they peered.
@test "re-peer the two clusters together" {
create_peering primary alpha
}
@test "alpha servers made connection to primary servers via alpha gateway" {
assert_envoy_metric_at_least 127.0.0.1:19003 "cluster.server.primary.peering.*cx_total" 1
}

2
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/bind.hcl Normal file
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bind_addr = "0.0.0.0"
advertise_addr = "{{ GetInterfaceIP \"eth0\" }}"

4
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/capture.sh Normal file
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#!/bin/bash
snapshot_envoy_admin localhost:19001 mesh-gateway primary || true
snapshot_envoy_admin localhost:19003 mesh-gateway alpha || true

3
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/base.hcl Normal file
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peering {
enabled = true
}

18
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/config_entries.hcl Normal file
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config_entries {
bootstrap = [
{
kind = "proxy-defaults"
name = "global"
config {
protocol = "tcp"
}
},
{
kind = "mesh"
peering {
peer_through_mesh_gateways = true
}
}
]
}

5
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/service_gateway.hcl Normal file
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services {
name = "mesh-gateway"
kind = "mesh-gateway"
port = 4431
}

20
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/service_s1.hcl Normal file
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services {
name = "s1"
port = 8080
connect {
sidecar_service {
proxy {
upstreams = [
{
destination_name = "s2"
destination_peer = "primary-to-alpha"
local_bind_port = 5000
mesh_gateway {
mode = "local"
}
}
]
}
}
}
}

1
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/service_s2.hcl Normal file
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# We don't want an s2 service in the primary dc

11
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/setup.sh Normal file
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#!/bin/bash
set -euo pipefail
register_services primary
gen_envoy_bootstrap s1 19000 primary
gen_envoy_bootstrap mesh-gateway 19001 primary true
wait_for_config_entry proxy-defaults global
wait_for_config_entry mesh mesh alpha

69
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/primary/verify.bats Normal file
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#!/usr/bin/env bats
load helpers
@test "s1 proxy is running correct version" {
assert_envoy_version 19000
}
@test "s1 proxy admin is up on :19000" {
retry_default curl -f -s localhost:19000/stats -o /dev/null
}
@test "gateway-primary proxy admin is up on :19001" {
retry_default curl -f -s localhost:19001/stats -o /dev/null
}
@test "s1 proxy listener should be up and have right cert" {
assert_proxy_presents_cert_uri localhost:21000 s1
}
@test "s2 proxies should be healthy in alpha" {
assert_service_has_healthy_instances s2 1 alpha
}
@test "gateway-primary should be up and listening" {
retry_long nc -z consul-primary-client:4431
}
@test "gateway-alpha should be up and listening" {
retry_long nc -z consul-alpha-client:4432
}
@test "peer the two clusters together" {
create_peering primary alpha
}
@test "acceptor gateway-primary should have healthy endpoints for primary servers" {
assert_upstream_has_endpoints_in_status 127.0.0.1:19001 server.primary.peering HEALTHY 1
}
@test "alpha servers made connection to primary servers via primary gateway" {
assert_envoy_metric_at_least 127.0.0.1:19001 "cluster.server.primary.peering.*cx_total" 1
}
@test "s2 alpha proxies should be healthy in primary" {
assert_service_has_healthy_instances s2 1 primary "" "" primary-to-alpha
}
@test "gateway-alpha should have healthy endpoints for s2" {
assert_upstream_has_endpoints_in_status consul-alpha-client:19003 exported~s2.default.alpha HEALTHY 1
}
@test "s1 upstream should have healthy endpoints for s2" {
assert_upstream_has_endpoints_in_status 127.0.0.1:19000 s2.default.primary-to-alpha.external HEALTHY 1
}
@test "s1 upstream should be able to connect to s2" {
run retry_default curl -s -f -d hello localhost:5000
[ "$status" -eq 0 ]
[ "$output" = "hello" ]
}
@test "s1 upstream made 1 connection to s2" {
assert_envoy_metric_at_least 127.0.0.1:19000 "cluster.s2.default.primary-to-alpha.external.*cx_total" 1
}
@test "s1 upstream made 1 connection to s2 through the primary mesh gateway" {
assert_envoy_metric_at_least 127.0.0.1:19001 "cluster.s2.default.default.alpha-to-primary.external.*cx_total" 1
}

4
test/integration/connect/envoy/case-cross-peer-control-plane-mgw/vars.sh Normal file
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#!/bin/bash
export REQUIRED_SERVICES="s1 s1-sidecar-proxy gateway-primary s2-alpha s2-sidecar-proxy-alpha gateway-alpha"
export REQUIRE_PEERS=1