xds: add support for envoy 1.15.0 and drop support for 1.11.x (#8424)

Related changes:

- hard-fail the xDS connection attempt if the envoy version is known to be too old to be supported
- remove the RouterMatchSafeRegex proxy feature since all supported envoy versions have it
- stop using --max-obj-name-len (due to: envoyproxy/envoy#11740)

.circleci/config.yml

@@ -640,13 +640,13 @@ jobs:
           command: bash <(curl -s https://codecov.io/bash) -v -c -C $CIRCLE_SHA1 -F ui
       - run: *notify-slack-failure
 
-  envoy-integration-test-1.11.2:
+  envoy-integration-test-1.12.6:
     docker:
       # We only really need bash and docker-compose which is installed on all
       # Circle images but pick Go since we have to pick one of them.
       - image: *GOLANG_IMAGE
     environment:
-      ENVOY_VERSION: "1.11.2"
+      ENVOY_VERSION: "1.12.6"
     steps: &ENVOY_INTEGRATION_TEST_STEPS
       - checkout
       # Get go binary from workspace
@@ -675,13 +675,6 @@ jobs:
           path: *TEST_RESULTS_DIR
       - run: *notify-slack-failure
 
-  envoy-integration-test-1.12.6:
-    docker:
-      - image: *GOLANG_IMAGE
-    environment:
-      ENVOY_VERSION: "1.12.6"
-    steps: *ENVOY_INTEGRATION_TEST_STEPS
-
   envoy-integration-test-1.13.4:
     docker:
       - image: *GOLANG_IMAGE
@@ -696,6 +689,13 @@ jobs:
       ENVOY_VERSION: "1.14.4"
     steps: *ENVOY_INTEGRATION_TEST_STEPS
 
+  envoy-integration-test-1.15.0:
+    docker:
+      - image: *GOLANG_IMAGE
+    environment:
+      ENVOY_VERSION: "1.15.0"
+    steps: *ENVOY_INTEGRATION_TEST_STEPS
+
   # run integration tests for the connect ca providers
   test-connect-ca-providers:
     docker:
@@ -807,9 +807,6 @@ workflows:
       - nomad-integration-0_8:
           requires:
             - dev-build
-      - envoy-integration-test-1.11.2:
-          requires:
-            - dev-build
       - envoy-integration-test-1.12.6:
           requires:
             - dev-build
@@ -819,6 +816,9 @@ workflows:
       - envoy-integration-test-1.14.4:
           requires:
             - dev-build
+      - envoy-integration-test-1.15.0:
+          requires:
+            - dev-build
 
   website:
     jobs:

agent/xds/clusters_test.go

@@ -11,6 +11,7 @@ import (
 	envoy "github.com/envoyproxy/go-control-plane/envoy/api/v2"
 	"github.com/hashicorp/consul/agent/proxycfg"
 	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/agent/xds/proxysupport"
 	"github.com/hashicorp/consul/sdk/testutil"
 	testinf "github.com/mitchellh/go-testing-interface"
 	"github.com/stretchr/testify/require"
@@ -527,8 +528,9 @@ func TestClustersFromSnapshot(t *testing.T) {
 		},
 	}
 
-	for _, envoyVersion := range supportedEnvoyVersions {
-		sf := determineSupportedProxyFeaturesFromString(envoyVersion)
+	for _, envoyVersion := range proxysupport.EnvoyVersions {
+		sf, err := determineSupportedProxyFeaturesFromString(envoyVersion)
+		require.NoError(t, err)
 		t.Run("envoy-"+envoyVersion, func(t *testing.T) {
 			for _, tt := range tests {
 				t.Run(tt.name, func(t *testing.T) {
@@ -737,13 +739,3 @@ func setupTLSRootsAndLeaf(t *testing.T, snap *proxycfg.ConfigSnapshot) {
 		snap.Roots.Roots[0].RootCert = golden(t, "test-root-cert", "", "")
 	}
 }
-
-// supportedEnvoyVersions lists the versions that we generated golden tests for
-//
-// see: https://www.consul.io/docs/connect/proxies/envoy#supported-versions
-var supportedEnvoyVersions = []string{
-	"1.14.4",
-	"1.13.4",
-	"1.12.6",
-	"1.11.2",
-}

agent/xds/endpoints_test.go

@@ -14,6 +14,7 @@ import (
 	envoyendpoint "github.com/envoyproxy/go-control-plane/envoy/api/v2/endpoint"
 	"github.com/hashicorp/consul/agent/proxycfg"
 	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/agent/xds/proxysupport"
 	"github.com/hashicorp/consul/sdk/testutil"
 	testinf "github.com/mitchellh/go-testing-interface"
 )
@@ -554,8 +555,9 @@ func Test_endpointsFromSnapshot(t *testing.T) {
 		},
 	}
 
-	for _, envoyVersion := range supportedEnvoyVersions {
-		sf := determineSupportedProxyFeaturesFromString(envoyVersion)
+	for _, envoyVersion := range proxysupport.EnvoyVersions {
+		sf, err := determineSupportedProxyFeaturesFromString(envoyVersion)
+		require.NoError(t, err)
 		t.Run("envoy-"+envoyVersion, func(t *testing.T) {
 			for _, tt := range tests {
 				t.Run(tt.name, func(t *testing.T) {

agent/xds/envoy_versioning.go

@@ -9,25 +9,37 @@ import (
 )
 
 var (
-	// minSafeRegexVersion reflects the minimum version where we could use safe_regex instead of regex
-	//
-	// NOTE: the first version that no longer supported the old style was 1.13.0
-	minSafeRegexVersion = version.Must(version.NewVersion("1.11.2"))
+	// minSupportedVersion is the oldest mainline version we support. This should always be
+	// the zero'th point release of the last element of proxysupport.EnvoyVersions.
+	minSupportedVersion = version.Must(version.NewVersion("1.12.0"))
 )
 
 type supportedProxyFeatures struct {
-	RouterMatchSafeRegex bool // use safe_regex instead of regex in http.router rules
+	// add version dependent feature flags here
 }
 
-func determineSupportedProxyFeatures(node *envoycore.Node) supportedProxyFeatures {
+func determineSupportedProxyFeatures(node *envoycore.Node) (supportedProxyFeatures, error) {
 	version := determineEnvoyVersionFromNode(node)
+	return determineSupportedProxyFeaturesFromVersion(version)
+}
+
+func determineSupportedProxyFeaturesFromString(vs string) (supportedProxyFeatures, error) {
+	version := version.Must(version.NewVersion(vs))
+	return determineSupportedProxyFeaturesFromVersion(version)
+}
+
+func determineSupportedProxyFeaturesFromVersion(version *version.Version) (supportedProxyFeatures, error) {
 	if version == nil {
-		return supportedProxyFeatures{}
+		// This would happen on either extremely old builds OR perhaps on
+		// custom builds. Should we error?
+		return supportedProxyFeatures{}, nil
 	}
 
-	return supportedProxyFeatures{
-		RouterMatchSafeRegex: !version.LessThan(minSafeRegexVersion),
+	if version.LessThan(minSupportedVersion) {
+		return supportedProxyFeatures{}, fmt.Errorf("Envoy %s is too old and is not supported by Consul", version)
 	}
+
+	return supportedProxyFeatures{}, nil
 }
 
 // example: 1580db37e9a97c37e410bad0e1507ae1a0fd9e77/1.12.4/Clean/RELEASE/BoringSSL
@@ -74,10 +86,3 @@ func determineEnvoyVersionFromNode(node *envoycore.Node) *version.Version {
 		),
 	))
 }
-
-func determineSupportedProxyFeaturesFromString(vs string) supportedProxyFeatures {
-	version := version.Must(version.NewVersion(vs))
-	return supportedProxyFeatures{
-		RouterMatchSafeRegex: !version.LessThan(minSafeRegexVersion),
-	}
-}

agent/xds/listeners_test.go

@@ -11,6 +11,7 @@ import (
 	envoy "github.com/envoyproxy/go-control-plane/envoy/api/v2"
 	"github.com/hashicorp/consul/agent/proxycfg"
 	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/agent/xds/proxysupport"
 	"github.com/hashicorp/consul/sdk/testutil"
 	testinf "github.com/mitchellh/go-testing-interface"
 	"github.com/stretchr/testify/require"
@@ -433,8 +434,9 @@ func TestListenersFromSnapshot(t *testing.T) {
 		},
 	}
 
-	for _, envoyVersion := range supportedEnvoyVersions {
-		sf := determineSupportedProxyFeaturesFromString(envoyVersion)
+	for _, envoyVersion := range proxysupport.EnvoyVersions {
+		sf, err := determineSupportedProxyFeaturesFromString(envoyVersion)
+		require.NoError(t, err)
 		t.Run("envoy-"+envoyVersion, func(t *testing.T) {
 			for _, tt := range tests {
 				t.Run(tt.name, func(t *testing.T) {

agent/xds/proxysupport/proxysupport.go

@@ -0,0 +1,11 @@
+package proxysupport
+
+// EnvoyVersions lists the latest officially supported versions of envoy.
+//
+// see: https://www.consul.io/docs/connect/proxies/envoy#supported-versions
+var EnvoyVersions = []string{
+	"1.15.0",
+	"1.14.4",
+	"1.13.4",
+	"1.12.6",
+}

agent/xds/routes.go

@@ -277,7 +277,7 @@ func makeUpstreamRouteForDiscoveryChain(
 	return host, nil
 }
 
-func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *structs.DiscoveryRoute) *envoyroute.RouteMatch {
+func makeRouteMatchForDiscoveryRoute(_ connectionInfo, discoveryRoute *structs.DiscoveryRoute) *envoyroute.RouteMatch {
 	match := discoveryRoute.Definition.Match
 	if match == nil || match.IsEmpty() {
 		return makeDefaultRouteMatch()
@@ -295,15 +295,9 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 			Prefix: match.HTTP.PathPrefix,
 		}
 	case match.HTTP.PathRegex != "":
-		if cInfo.ProxyFeatures.RouterMatchSafeRegex {
 		em.PathSpecifier = &envoyroute.RouteMatch_SafeRegex{
 			SafeRegex: makeEnvoyRegexMatch(match.HTTP.PathRegex),
 		}
-		} else {
-			em.PathSpecifier = &envoyroute.RouteMatch_Regex{
-				Regex: match.HTTP.PathRegex,
-			}
-		}
 	default:
 		em.PathSpecifier = &envoyroute.RouteMatch_Prefix{
 			Prefix: "/",
@@ -323,15 +317,9 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 					ExactMatch: hdr.Exact,
 				}
 			case hdr.Regex != "":
-				if cInfo.ProxyFeatures.RouterMatchSafeRegex {
 				eh.HeaderMatchSpecifier = &envoyroute.HeaderMatcher_SafeRegexMatch{
 					SafeRegexMatch: makeEnvoyRegexMatch(hdr.Regex),
 				}
-				} else {
-					eh.HeaderMatchSpecifier = &envoyroute.HeaderMatcher_RegexMatch{
-						RegexMatch: hdr.Regex,
-					}
-				}
 			case hdr.Prefix != "":
 				eh.HeaderMatchSpecifier = &envoyroute.HeaderMatcher_PrefixMatch{
 					PrefixMatch: hdr.Prefix,
@@ -361,15 +349,9 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 
 		eh := &envoyroute.HeaderMatcher{
 			Name: ":method",
-		}
-		if cInfo.ProxyFeatures.RouterMatchSafeRegex {
-			eh.HeaderMatchSpecifier = &envoyroute.HeaderMatcher_SafeRegexMatch{
+			HeaderMatchSpecifier: &envoyroute.HeaderMatcher_SafeRegexMatch{
 				SafeRegexMatch: makeEnvoyRegexMatch(methodHeaderRegex),
-			}
-		} else {
-			eh.HeaderMatchSpecifier = &envoyroute.HeaderMatcher_RegexMatch{
-				RegexMatch: methodHeaderRegex,
-			}
+			},
 		}
 
 		em.Headers = append(em.Headers, eh)
@@ -384,7 +366,6 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 
 			switch {
 			case qm.Exact != "":
-				if cInfo.ProxyFeatures.RouterMatchSafeRegex {
 				eq.QueryParameterMatchSpecifier = &envoyroute.QueryParameterMatcher_StringMatch{
 					StringMatch: &envoymatcher.StringMatcher{
 						MatchPattern: &envoymatcher.StringMatcher_Exact{
@@ -392,11 +373,7 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 						},
 					},
 				}
-				} else {
-					eq.Value = qm.Exact
-				}
 			case qm.Regex != "":
-				if cInfo.ProxyFeatures.RouterMatchSafeRegex {
 				eq.QueryParameterMatchSpecifier = &envoyroute.QueryParameterMatcher_StringMatch{
 					StringMatch: &envoymatcher.StringMatcher{
 						MatchPattern: &envoymatcher.StringMatcher_SafeRegex{
@@ -404,18 +381,10 @@ func makeRouteMatchForDiscoveryRoute(cInfo connectionInfo, discoveryRoute *struc
 						},
 					},
 				}
-				} else {
-					eq.Value = qm.Regex
-					eq.Regex = makeBoolValue(true)
-				}
 			case qm.Present:
-				if cInfo.ProxyFeatures.RouterMatchSafeRegex {
 				eq.QueryParameterMatchSpecifier = &envoyroute.QueryParameterMatcher_PresentMatch{
 					PresentMatch: true,
 				}
-				} else {
-					eq.Value = ""
-				}
 			default:
 				continue // skip this impossible situation
 			}

agent/xds/routes_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/hashicorp/consul/agent/consul/discoverychain"
 	"github.com/hashicorp/consul/agent/proxycfg"
 	"github.com/hashicorp/consul/agent/structs"
+	"github.com/hashicorp/consul/agent/xds/proxysupport"
 	testinf "github.com/mitchellh/go-testing-interface"
 	"github.com/stretchr/testify/require"
 )
@@ -175,8 +176,9 @@ func TestRoutesFromSnapshot(t *testing.T) {
 		},
 	}
 
-	for _, envoyVersion := range supportedEnvoyVersions {
-		sf := determineSupportedProxyFeaturesFromString(envoyVersion)
+	for _, envoyVersion := range proxysupport.EnvoyVersions {
+		sf, err := determineSupportedProxyFeaturesFromString(envoyVersion)
+		require.NoError(t, err)
 		t.Run("envoy-"+envoyVersion, func(t *testing.T) {
 			for _, tt := range tests {
 				t.Run(tt.name, func(t *testing.T) {

agent/xds/server.go

@@ -311,7 +311,11 @@ func (s *Server) process(stream ADSStream, reqCh <-chan *envoy.DiscoveryRequest)
 
 			if node == nil && req.Node != nil {
 				node = req.Node
-				proxyFeatures = determineSupportedProxyFeatures(req.Node)
+				var err error
+				proxyFeatures, err = determineSupportedProxyFeatures(req.Node)
+				if err != nil {
+					return status.Errorf(codes.InvalidArgument, err.Error())
+				}
 			}
 
 			if handler, ok := handlers[req.TypeUrl]; ok {