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 62b2aee20d
commit c448359677
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
// filter chain when in transparent proxy mode
var (
@ -773,6 +773,9 @@ func TestConfigSnapshotTransparentProxyDestinationHTTP(t testing.T) *ConfigSnaps
},
}
return TestConfigSnapshot(t, func(ns *structs.NodeService) {
if nsFn != nil {
nsFn(ns)
}
ns.Proxy.Mode = structs.ProxyModeTransparent
}, []UpdateEvent{
{

View File

@ -508,6 +508,13 @@ end`,
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",
create: func(t testinf.T) *proxycfg.ConfigSnapshot {

View File

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

View File

@ -0,0 +1,315 @@
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}
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}
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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
}
if patchedListener, err = b.patchListenerFilterChains(config, patchedListener, nameOrSNI); err == nil {
if patchedListener, err = b.patchSupportedListenerFilterChains(config, patchedListener, nameOrSNI); err == nil {
patchedListeners[nameOrSNI] = patchedListener
} else {
resultErr = multierror.Append(resultErr, err)
@ -285,76 +285,22 @@ func (b *BasicEnvoyExtender) patchListeners(config *RuntimeConfig, listeners Lis
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 {
case api.ServiceKindTerminatingGateway:
return b.patchTerminatingGatewayListenerFilterChains(config, l, nameOrSNI)
case api.ServiceKindConnectProxy:
return b.patchConnectProxyListenerFilterChains(config, l, nameOrSNI)
case api.ServiceKindTerminatingGateway, api.ServiceKindConnectProxy:
return b.patchListenerFilterChains(config, l, nameOrSNI)
}
return l, nil
}
func (b *BasicEnvoyExtender) patchTerminatingGatewayListenerFilterChains(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) {
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: %w", 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))
resultErr = multierror.Append(resultErr, fmt.Errorf("error patching listener filter chain %q: %w", nameOrSNI, err))
}
}

View File

@ -214,7 +214,11 @@ func (ext *UpstreamEnvoyExtender) patchTProxyListener(config *RuntimeConfig, l *
var resultErr error
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 {
var filters []*envoy_listener_v3.Filter