Avoid panic applying TProxy Envoy extensions (#17537)

When UpstreamEnvoyExtender was introduced, some code was left duplicated
between it and BasicEnvoyExtender. One path in that code panics when a
TProxy listener patch is attempted due to no upstream data in
RuntimeConfig matching the local service (which would only happen in
rare cases).

Instead, we can remove the special handling of upstream VIPs from
BasicEnvoyExtender entirely, greatly simplifying the listener filter
patch code and avoiding the panic. UpstreamEnvoyExtender, which needs
this code to function, is modified to ensure a panic does not occur.

This also fixes a second regression in which the Lua extension was not
applied to TProxy outbound listeners.
This commit is contained in:
Michael Zalimeni 2023-06-01 13:04:39 -04:00 committed by GitHub
parent ca12ce926b
commit ad03a5d0f2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 928 additions and 64 deletions

View File

@ -728,7 +728,7 @@ func TestConfigSnapshotTransparentProxyDestination(t testing.T) *ConfigSnapshot
}) })
} }
func TestConfigSnapshotTransparentProxyDestinationHTTP(t testing.T) *ConfigSnapshot { func TestConfigSnapshotTransparentProxyDestinationHTTP(t testing.T, nsFn func(ns *structs.NodeService)) *ConfigSnapshot {
// DiscoveryChain without an UpstreamConfig should yield a // DiscoveryChain without an UpstreamConfig should yield a
// filter chain when in transparent proxy mode // filter chain when in transparent proxy mode
var ( var (
@ -773,6 +773,9 @@ func TestConfigSnapshotTransparentProxyDestinationHTTP(t testing.T) *ConfigSnaps
}, },
} }
return TestConfigSnapshot(t, func(ns *structs.NodeService) { return TestConfigSnapshot(t, func(ns *structs.NodeService) {
if nsFn != nil {
nsFn(ns)
}
ns.Proxy.Mode = structs.ProxyModeTransparent ns.Proxy.Mode = structs.ProxyModeTransparent
}, []UpdateEvent{ }, []UpdateEvent{
{ {

View File

@ -508,6 +508,13 @@ end`,
return proxycfg.TestConfigSnapshotDiscoveryChain(t, "default", false, makeLuaNsFunc(false), nil) return proxycfg.TestConfigSnapshotDiscoveryChain(t, "default", false, makeLuaNsFunc(false), nil)
}, },
}, },
{
name: "lua-outbound-applies-to-local-upstreams-tproxy",
create: func(t testinf.T) *proxycfg.ConfigSnapshot {
// upstreams need to be http in order for lua to be applied to listeners.
return proxycfg.TestConfigSnapshotTransparentProxyDestinationHTTP(t, makeLuaNsFunc(false))
},
},
{ {
name: "lua-connect-proxy-with-terminating-gateway-upstream", name: "lua-connect-proxy-with-terminating-gateway-upstream",
create: func(t testinf.T) *proxycfg.ConfigSnapshot { create: func(t testinf.T) *proxycfg.ConfigSnapshot {

View File

@ -203,8 +203,10 @@ func getConnectProxyTransparentProxyGoldenTestCases() []goldenTestCase {
create: proxycfg.TestConfigSnapshotTransparentProxyDestination, create: proxycfg.TestConfigSnapshotTransparentProxyDestination,
}, },
{ {
name: "transparent-proxy-destination-http", name: "transparent-proxy-destination-http",
create: proxycfg.TestConfigSnapshotTransparentProxyDestinationHTTP, create: func(t testinf.T) *proxycfg.ConfigSnapshot {
return proxycfg.TestConfigSnapshotTransparentProxyDestinationHTTP(t, nil)
},
}, },
{ {
name: "transparent-proxy-terminating-gateway-destinations-only", name: "transparent-proxy-terminating-gateway-destinations-only",

View File

@ -0,0 +1,315 @@
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}
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"privateKey": {
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}
}
],
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}
}
],
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}
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"certificateChain": {
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},
"privateKey": {
"inlineString": "-----BEGIN EC PRIVATE KEY-----\nMHcCAQEEIMoTkpRggp3fqZzFKh82yS4LjtJI+XY+qX/7DefHFrtdoAoGCCqGSM49\nAwEHoUQDQgAEADPv1RHVNRfa2VKRAB16b6rZnEt7tuhaxCFpQXPj7M2omb0B9Fav\nq5E0ivpNtv1QnFhxtPd7d5k4e+T7SkW1TQ==\n-----END EC PRIVATE KEY-----\n"
}
}
],
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}
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},
"privateKey": {
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}
}
],
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],
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"nonce": "00000001"
}

View File

@ -0,0 +1,163 @@
{
"versionInfo": "00000001",
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],
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"nonce": "00000001"
}

View File

@ -0,0 +1,339 @@
{
"versionInfo": "00000001",
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},
{
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"virtualHosts": [
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"domains": [
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],
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},
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}
}
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},
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{
"header": "x-forwarded-client-cert",
"onHeaderPresent": {
"metadataNamespace": "consul",
"key": "trust-domain",
"regexValueRewrite": {
"pattern": {
"googleRe2": {},
"regex": ".*URI=spiffe://([^/]+.[^/]+)(?:/ap/([^/]+))?/ns/([^/]+)/dc/([^/]+)/svc/([^/;,]+).*"
},
"substitution": "\\1"
}
}
},
{
"header": "x-forwarded-client-cert",
"onHeaderPresent": {
"metadataNamespace": "consul",
"key": "partition",
"regexValueRewrite": {
"pattern": {
"googleRe2": {},
"regex": ".*URI=spiffe://([^/]+.[^/]+)(?:/ap/([^/]+))?/ns/([^/]+)/dc/([^/]+)/svc/([^/;,]+).*"
},
"substitution": "\\2"
}
}
},
{
"header": "x-forwarded-client-cert",
"onHeaderPresent": {
"metadataNamespace": "consul",
"key": "namespace",
"regexValueRewrite": {
"pattern": {
"googleRe2": {},
"regex": ".*URI=spiffe://([^/]+.[^/]+)(?:/ap/([^/]+))?/ns/([^/]+)/dc/([^/]+)/svc/([^/;,]+).*"
},
"substitution": "\\3"
}
}
},
{
"header": "x-forwarded-client-cert",
"onHeaderPresent": {
"metadataNamespace": "consul",
"key": "datacenter",
"regexValueRewrite": {
"pattern": {
"googleRe2": {},
"regex": ".*URI=spiffe://([^/]+.[^/]+)(?:/ap/([^/]+))?/ns/([^/]+)/dc/([^/]+)/svc/([^/;,]+).*"
},
"substitution": "\\4"
}
}
},
{
"header": "x-forwarded-client-cert",
"onHeaderPresent": {
"metadataNamespace": "consul",
"key": "service",
"regexValueRewrite": {
"pattern": {
"googleRe2": {},
"regex": ".*URI=spiffe://([^/]+.[^/]+)(?:/ap/([^/]+))?/ns/([^/]+)/dc/([^/]+)/svc/([^/;,]+).*"
},
"substitution": "\\5"
}
}
}
]
}
},
{
"name": "envoy.filters.http.router",
"typedConfig": {
"@type": "type.googleapis.com/envoy.extensions.filters.http.router.v3.Router"
}
}
],
"tracing": {
"randomSampling": {}
},
"forwardClientCertDetails": "APPEND_FORWARD",
"setCurrentClientCertDetails": {
"subject": true,
"cert": true,
"chain": true,
"dns": true,
"uri": true
}
}
}
],
"transportSocket": {
"name": "tls",
"typedConfig": {
"@type": "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext",
"commonTlsContext": {
"tlsParams": {},
"tlsCertificates": [
{
"certificateChain": {
"inlineString": "-----BEGIN CERTIFICATE-----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\npY0heYeK9A6iOLrzqxSerkXXQyj5e9bE4VgUnxgPU6g=\n-----END CERTIFICATE-----\n"
},
"privateKey": {
"inlineString": "-----BEGIN EC PRIVATE KEY-----\nMHcCAQEEIMoTkpRggp3fqZzFKh82yS4LjtJI+XY+qX/7DefHFrtdoAoGCCqGSM49\nAwEHoUQDQgAEADPv1RHVNRfa2VKRAB16b6rZnEt7tuhaxCFpQXPj7M2omb0B9Fav\nq5E0ivpNtv1QnFhxtPd7d5k4e+T7SkW1TQ==\n-----END EC PRIVATE KEY-----\n"
}
}
],
"validationContext": {
"trustedCa": {
"inlineString": "-----BEGIN CERTIFICATE-----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\noR5f6Ku+cig2Il8T8LJujOp2/2A72QcHZA57B13y+8o=\n-----END CERTIFICATE-----\n"
}
},
"alpnProtocols": [
"http/1.1"
]
},
"requireClientCertificate": true
}
}
}
],
"trafficDirection": "INBOUND"
}
],
"typeUrl": "type.googleapis.com/envoy.config.listener.v3.Listener",
"nonce": "00000001"
}

View File

@ -0,0 +1,85 @@
{
"versionInfo": "00000001",
"resources": [
{
"@type": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
"name": "destination.443.~http.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"virtualHosts": [
{
"name": "destination.www-google-com.google.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"domains": [
"www.google.com"
],
"routes": [
{
"match": {
"prefix": "/"
},
"route": {
"cluster": "destination.www-google-com.google.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul"
}
}
]
}
],
"validateClusters": true
},
{
"@type": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
"name": "destination.9093.~http.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"virtualHosts": [
{
"name": "destination.192-168-2-3.kafka2.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"domains": [
"192.168.2.3"
],
"routes": [
{
"match": {
"prefix": "/"
},
"route": {
"cluster": "destination.192-168-2-3.kafka2.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul"
}
}
]
},
{
"name": "destination.192-168-2-2.kafka2.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"domains": [
"192.168.2.2"
],
"routes": [
{
"match": {
"prefix": "/"
},
"route": {
"cluster": "destination.192-168-2-2.kafka2.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul"
}
}
]
},
{
"name": "destination.192-168-2-1.kafka.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul",
"domains": [
"192.168.2.1"
],
"routes": [
{
"match": {
"prefix": "/"
},
"route": {
"cluster": "destination.192-168-2-1.kafka.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul"
}
}
]
}
],
"validateClusters": true
}
],
"typeUrl": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
"nonce": "00000001"
}

View File

@ -275,7 +275,7 @@ func (b *BasicEnvoyExtender) patchListeners(config *RuntimeConfig, listeners Lis
patchedListener = listener patchedListener = listener
} }
if patchedListener, err = b.patchListenerFilterChains(config, patchedListener, nameOrSNI); err == nil { if patchedListener, err = b.patchSupportedListenerFilterChains(config, patchedListener, nameOrSNI); err == nil {
patchedListeners[nameOrSNI] = patchedListener patchedListeners[nameOrSNI] = patchedListener
} else { } else {
resultErr = multierror.Append(resultErr, err) resultErr = multierror.Append(resultErr, err)
@ -285,76 +285,22 @@ func (b *BasicEnvoyExtender) patchListeners(config *RuntimeConfig, listeners Lis
return patchedListeners, resultErr return patchedListeners, resultErr
} }
func (b *BasicEnvoyExtender) patchListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener, nameOrSNI string) (*envoy_listener_v3.Listener, error) { func (b *BasicEnvoyExtender) patchSupportedListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener, nameOrSNI string) (*envoy_listener_v3.Listener, error) {
switch config.Kind { switch config.Kind {
case api.ServiceKindTerminatingGateway: case api.ServiceKindTerminatingGateway, api.ServiceKindConnectProxy:
return b.patchTerminatingGatewayListenerFilterChains(config, l, nameOrSNI) return b.patchListenerFilterChains(config, l, nameOrSNI)
case api.ServiceKindConnectProxy:
return b.patchConnectProxyListenerFilterChains(config, l, nameOrSNI)
} }
return l, nil return l, nil
} }
func (b *BasicEnvoyExtender) patchTerminatingGatewayListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener, nameOrSNI string) (*envoy_listener_v3.Listener, error) { func (b *BasicEnvoyExtender) patchListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener, nameOrSNI string) (*envoy_listener_v3.Listener, error) {
var resultErr error
for idx, filterChain := range l.FilterChains {
if patchedFilterChain, err := b.patchFilterChain(config, filterChain, l); err == nil {
l.FilterChains[idx] = patchedFilterChain
} else {
resultErr = multierror.Append(resultErr, fmt.Errorf("error patching filter chain of terminating gateway listener %q: %w", nameOrSNI, err))
}
}
return l, resultErr
}
func (b *BasicEnvoyExtender) patchConnectProxyListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener, nameOrSNI string) (*envoy_listener_v3.Listener, error) {
if IsOutboundTProxyListener(l) {
patchedListener, err := b.patchTProxyListenerFilterChains(config, l)
if err == nil {
return patchedListener, nil
} else {
return l, fmt.Errorf("error patching filter chain of TProxy listener %q: %w", nameOrSNI, err)
}
} else {
patchedListener, err := b.patchNonTProxyConnectProxyListenerFilterChains(config, l)
if err == nil {
return patchedListener, nil
} else {
return l, fmt.Errorf("error patching filter chain of connect proxy listener %q: %w", nameOrSNI, err)
}
}
}
func (b *BasicEnvoyExtender) patchNonTProxyConnectProxyListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener) (*envoy_listener_v3.Listener, error) {
var resultErr error var resultErr error
for idx, filterChain := range l.FilterChains { for idx, filterChain := range l.FilterChains {
if patchedFilterChain, err := b.patchFilterChain(config, filterChain, l); err == nil { if patchedFilterChain, err := b.patchFilterChain(config, filterChain, l); err == nil {
l.FilterChains[idx] = patchedFilterChain l.FilterChains[idx] = patchedFilterChain
} else { } else {
resultErr = multierror.Append(resultErr, fmt.Errorf("error patching filter chain: %w", err)) resultErr = multierror.Append(resultErr, fmt.Errorf("error patching listener filter chain %q: %w", nameOrSNI, err))
}
}
return l, resultErr
}
func (b *BasicEnvoyExtender) patchTProxyListenerFilterChains(config *RuntimeConfig, l *envoy_listener_v3.Listener) (*envoy_listener_v3.Listener, error) {
var resultErr error
vip := config.Upstreams[config.ServiceName].VIP
for idx, filterChain := range l.FilterChains {
match := filterChainTProxyMatch(vip, filterChain)
if !match {
continue
}
if patchedFilterChain, err := b.patchFilterChain(config, filterChain, l); err == nil {
l.FilterChains[idx] = patchedFilterChain
} else {
resultErr = multierror.Append(resultErr, fmt.Errorf("error patching filter chain for %q: %w", vip, err))
} }
} }

View File

@ -214,7 +214,11 @@ func (ext *UpstreamEnvoyExtender) patchTProxyListener(config *RuntimeConfig, l *
var resultErr error var resultErr error
patched := false patched := false
vip := config.Upstreams[config.ServiceName].VIP upstream := config.Upstreams[config.ServiceName]
if upstream == nil {
return l, false, nil
}
vip := upstream.VIP
for _, filterChain := range l.FilterChains { for _, filterChain := range l.FilterChains {
var filters []*envoy_listener_v3.Filter var filters []*envoy_listener_v3.Filter