Restore old Envoy prefix on escape hatches

This is done because after removing ID and NodeName from
ServiceConfigRequest we will no longer know whether a request coming in
is for a Consul client earlier than v1.10.

agent/consul/config_endpoint.go

@@ -498,7 +498,7 @@ func (c *ConfigEntry) ResolveServiceConfig(args *structs.ServiceConfigRequest, r
 
 				// Merge centralized defaults for all upstreams before configuration for specific upstreams
 				if upstreamDefaults != nil {
-					upstreamDefaults.MergeInto(resolvedCfg, args.ID == "")
+					upstreamDefaults.MergeInto(resolvedCfg)
 				}
 				// The value from the proxy registration overrides the one from upstream_defaults because
 				// it is specific to the proxy instance
@@ -507,7 +507,7 @@ func (c *ConfigEntry) ResolveServiceConfig(args *structs.ServiceConfigRequest, r
 				}
 
 				if upstreamConfigs[upstream.String()] != nil {
-					upstreamConfigs[upstream.String()].MergeInto(resolvedCfg, args.ID == "")
+					upstreamConfigs[upstream.String()].MergeInto(resolvedCfg)
 				}
 
 				if len(resolvedCfg) > 0 {

agent/structs/config_entry.go

@@ -633,20 +633,20 @@ func (r *ServiceConfigRequest) CacheInfo() cache.RequestInfo {
 }
 
 type UpstreamConfig struct {
-	// ListenerJSON is a complete override ("escape hatch") for the upstream's
+	// EnvoyListenerJSON is a complete override ("escape hatch") for the upstream's
 	// listener.
 	//
 	// Note: This escape hatch is NOT compatible with the discovery chain and
 	// will be ignored if a discovery chain is active.
-	ListenerJSON string `json:",omitempty" alias:"listener_json,envoy_listener_json"`
+	EnvoyListenerJSON string `json:",omitempty" alias:"envoy_listener_json"`
 
-	// ClusterJSON is a complete override ("escape hatch") for the upstream's
+	// EnvoyClusterJSON is a complete override ("escape hatch") for the upstream's
 	// cluster. The Connect client TLS certificate and context will be injected
 	// overriding any TLS settings present.
 	//
 	// Note: This escape hatch is NOT compatible with the discovery chain and
 	// will be ignored if a discovery chain is active.
-	ClusterJSON string `json:",omitempty" alias:"cluster_json,envoy_cluster_json"`
+	EnvoyClusterJSON string `json:",omitempty" alias:"envoy_cluster_json"`
 
 	// Protocol describes the upstream's service protocol. Valid values are "tcp",
 	// "http" and "grpc". Anything else is treated as tcp. The enables protocol
@@ -670,23 +670,13 @@ type UpstreamConfig struct {
 	MeshGateway MeshGatewayConfig `json:",omitempty" alias:"mesh_gateway" `
 }
 
-func (cfg UpstreamConfig) MergeInto(dst map[string]interface{}, legacy bool) {
-	var (
-		listenerKey = "listener_json"
-		clusterKey  = "cluster_json"
-	)
-	// Starting in Consul 1.10, the "envoy_" prefix was removed from these flags
-	if legacy {
-		listenerKey = fmt.Sprintf("envoy_%s", listenerKey)
-		clusterKey = fmt.Sprintf("envoy_%s", clusterKey)
-	}
-
+func (cfg UpstreamConfig) MergeInto(dst map[string]interface{}) {
 	// Avoid storing empty values in the map, since these can act as overrides
-	if cfg.ListenerJSON != "" {
-		dst[listenerKey] = cfg.ListenerJSON
+	if cfg.EnvoyListenerJSON != "" {
+		dst["envoy_listener_json"] = cfg.EnvoyListenerJSON
 	}
-	if cfg.ClusterJSON != "" {
-		dst[clusterKey] = cfg.ClusterJSON
+	if cfg.EnvoyClusterJSON != "" {
+		dst["envoy_cluster_json"] = cfg.EnvoyClusterJSON
 	}
 	if cfg.Protocol != "" {
 		dst["protocol"] = cfg.Protocol

agent/structs/config_entry_test.go

@@ -131,8 +131,8 @@ func TestDecodeConfigEntry(t *testing.T) {
 					upstream_defaults {
 						connect_timeout_ms = 5
 						protocol = "http"
-						listener_json = "foo"
-						cluster_json = "bar"
+						envoy_listener_json = "foo"
+						envoy_cluster_json = "bar"
 						limits {
 							max_connections = 3
 							max_pending_requests = 4
@@ -169,8 +169,8 @@ func TestDecodeConfigEntry(t *testing.T) {
 						}
 					}
 					UpstreamDefaults {
-						ListenerJSON = "foo"
-						ClusterJSON = "bar"
+						EnvoyListenerJSON = "foo"
+						EnvoyClusterJSON = "bar"
 						ConnectTimeoutMs = 5
 						Protocol = "http"
 						Limits {
@@ -206,8 +206,8 @@ func TestDecodeConfigEntry(t *testing.T) {
 						},
 					},
 					UpstreamDefaults: &UpstreamConfig{
-						ListenerJSON:     "foo",
-						ClusterJSON:      "bar",
+						EnvoyListenerJSON: "foo",
+						EnvoyClusterJSON:  "bar",
 						ConnectTimeoutMs:  5,
 						Protocol:          "http",
 						Limits: &UpstreamLimits{
@@ -1600,15 +1600,13 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 		name        string
 		source      UpstreamConfig
 		destination map[string]interface{}
-		legacy      bool
 		want        map[string]interface{}
 	}{
 		{
 			name: "kitchen sink",
-			legacy: false,
 			source: UpstreamConfig{
-				ListenerJSON:     "foo",
-				ClusterJSON:      "bar",
+				EnvoyListenerJSON: "foo",
+				EnvoyClusterJSON:  "bar",
 				ConnectTimeoutMs:  5,
 				Protocol:          "http",
 				Limits: &UpstreamLimits{
@@ -1624,8 +1622,8 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 			},
 			destination: make(map[string]interface{}),
 			want: map[string]interface{}{
-				"listener_json":      "foo",
-				"cluster_json":       "bar",
+				"envoy_listener_json": "foo",
+				"envoy_cluster_json":  "bar",
 				"connect_timeout_ms":  5,
 				"protocol":            "http",
 				"limits": &UpstreamLimits{
@@ -1642,10 +1640,9 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 		},
 		{
 			name: "kitchen sink override of destination",
-			legacy: false,
 			source: UpstreamConfig{
-				ListenerJSON:     "foo",
-				ClusterJSON:      "bar",
+				EnvoyListenerJSON: "foo",
+				EnvoyClusterJSON:  "bar",
 				ConnectTimeoutMs:  5,
 				Protocol:          "http",
 				Limits: &UpstreamLimits{
@@ -1660,8 +1657,8 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 				MeshGateway: MeshGatewayConfig{Mode: MeshGatewayModeRemote},
 			},
 			destination: map[string]interface{}{
-				"listener_json":      "zip",
-				"cluster_json":       "zap",
+				"envoy_listener_json": "zip",
+				"envoy_cluster_json":  "zap",
 				"connect_timeout_ms":  10,
 				"protocol":            "grpc",
 				"limits": &UpstreamLimits{
@@ -1676,8 +1673,8 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 				"mesh_gateway": MeshGatewayConfig{Mode: MeshGatewayModeLocal},
 			},
 			want: map[string]interface{}{
-				"listener_json":      "foo",
-				"cluster_json":       "bar",
+				"envoy_listener_json": "foo",
+				"envoy_cluster_json":  "bar",
 				"connect_timeout_ms":  5,
 				"protocol":            "http",
 				"limits": &UpstreamLimits{
@@ -1692,26 +1689,12 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 				"mesh_gateway": MeshGatewayConfig{Mode: MeshGatewayModeRemote},
 			},
 		},
-		{
-			name:   "legacy flag adds envoy prefix",
-			legacy: true,
-			source: UpstreamConfig{
-				ListenerJSON: "foo",
-				ClusterJSON:  "bar",
-			},
-			destination: make(map[string]interface{}),
-			want: map[string]interface{}{
-				"envoy_listener_json": "foo",
-				"envoy_cluster_json":  "bar",
-			},
-		},
 		{
 			name:   "empty source leaves destination intact",
-			legacy: true,
 			source: UpstreamConfig{},
 			destination: map[string]interface{}{
-				"listener_json":      "zip",
-				"cluster_json":       "zap",
+				"envoy_listener_json": "zip",
+				"envoy_cluster_json":  "zap",
 				"connect_timeout_ms":  10,
 				"protocol":            "grpc",
 				"limits": &UpstreamLimits{
@@ -1726,8 +1709,8 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 				"mesh_gateway": MeshGatewayConfig{Mode: MeshGatewayModeLocal},
 			},
 			want: map[string]interface{}{
-				"listener_json":      "zip",
-				"cluster_json":       "zap",
+				"envoy_listener_json": "zip",
+				"envoy_cluster_json":  "zap",
 				"connect_timeout_ms":  10,
 				"protocol":            "grpc",
 				"limits": &UpstreamLimits{
@@ -1744,7 +1727,6 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 		},
 		{
 			name:        "empty source and destination is a noop",
-			legacy:      true,
 			source:      UpstreamConfig{},
 			destination: make(map[string]interface{}),
 			want:        map[string]interface{}{},
@@ -1752,7 +1734,7 @@ func TestUpstreamConfig_MergeInto(t *testing.T) {
 	}
 	for _, tc := range tt {
 		t.Run(tc.name, func(t *testing.T) {
-			tc.source.MergeInto(tc.destination, tc.legacy)
+			tc.source.MergeInto(tc.destination)
 			assert.Equal(t, tc.want, tc.destination)
 		})
 	}

agent/xds/clusters.go

@@ -392,8 +392,8 @@ func (s *Server) makeUpstreamClusterForPreparedQuery(upstream structs.Upstream,
 		// default config if there is an error so it's safe to continue.
 		s.Logger.Warn("failed to parse", "upstream", upstream.Identifier(), "error", err)
 	}
-	if cfg.ClusterJSON != "" {
-		c, err = makeClusterFromUserConfig(cfg.ClusterJSON)
+	if cfg.EnvoyClusterJSON != "" {
+		c, err = makeClusterFromUserConfig(cfg.EnvoyClusterJSON)
 		if err != nil {
 			return c, err
 		}
@@ -457,11 +457,11 @@ func (s *Server) makeUpstreamClustersForDiscoveryChain(
 	}
 
 	var escapeHatchCluster *envoy_cluster_v3.Cluster
-	if cfg.ClusterJSON != "" {
+	if cfg.EnvoyClusterJSON != "" {
 		if chain.IsDefault() {
 			// If you haven't done anything to setup the discovery chain, then
 			// you can use the envoy_cluster_json escape hatch.
-			escapeHatchCluster, err = makeClusterFromUserConfig(cfg.ClusterJSON)
+			escapeHatchCluster, err = makeClusterFromUserConfig(cfg.EnvoyClusterJSON)
 			if err != nil {
 				return nil, err
 			}

agent/xds/endpoints.go

@@ -321,11 +321,11 @@ func (s *Server) endpointsFromDiscoveryChain(
 	}
 
 	var escapeHatchCluster *envoy_cluster_v3.Cluster
-	if cfg.ClusterJSON != "" {
+	if cfg.EnvoyClusterJSON != "" {
 		if chain.IsDefault() {
 			// If you haven't done anything to setup the discovery chain, then
 			// you can use the envoy_cluster_json escape hatch.
-			escapeHatchCluster, err = makeClusterFromUserConfig(cfg.ClusterJSON)
+			escapeHatchCluster, err = makeClusterFromUserConfig(cfg.EnvoyClusterJSON)
 			if err != nil {
 				return resources
 			}

agent/xds/listeners.go

@@ -987,8 +987,8 @@ func (s *Server) makeUpstreamListenerForDiscoveryChain(
 	l := makeListener(upstreamID, address, u.LocalBindPort, envoy_core_v3.TrafficDirection_OUTBOUND)
 
 	cfg := getAndModifyUpstreamConfigForListener(s.Logger, u, chain)
-	if cfg.ListenerJSON != "" {
-		return makeListenerFromUserConfig(cfg.ListenerJSON)
+	if cfg.EnvoyListenerJSON != "" {
+		return makeListenerFromUserConfig(cfg.EnvoyListenerJSON)
 	}
 
 	useRDS := true
@@ -1094,12 +1094,12 @@ func getAndModifyUpstreamConfigForListener(logger hclog.Logger, u *structs.Upstr
 			logger.Warn("failed to parse", "upstream", u.Identifier(), "error", err)
 		}
 
-		if cfg.ListenerJSON != "" {
+		if cfg.EnvoyListenerJSON != "" {
 			logger.Warn("ignoring escape hatch setting because already configured for",
 				"discovery chain", chain.ServiceName, "upstream", u.Identifier(), "config", "envoy_listener_json")
 
 			// Remove from config struct so we don't use it later on
-			cfg.ListenerJSON = ""
+			cfg.EnvoyListenerJSON = ""
 		}
 
 		proto := cfg.Protocol

api/config_entry.go

@@ -100,20 +100,20 @@ type ConnectConfiguration struct {
 }
 
 type UpstreamConfig struct {
-	// ListenerJSON is a complete override ("escape hatch") for the upstream's
+	// EnvoyListenerJSON is a complete override ("escape hatch") for the upstream's
 	// listener.
 	//
 	// Note: This escape hatch is NOT compatible with the discovery chain and
 	// will be ignored if a discovery chain is active.
-	ListenerJSON string `json:",omitempty" alias:"listener_json"`
+	EnvoyListenerJSON string `json:",omitempty" alias:"envoy_listener_json"`
 
-	// ClusterJSON is a complete override ("escape hatch") for the upstream's
+	// EnvoyClusterJSON is a complete override ("escape hatch") for the upstream's
 	// cluster. The Connect client TLS certificate and context will be injected
 	// overriding any TLS settings present.
 	//
 	// Note: This escape hatch is NOT compatible with the discovery chain and
 	// will be ignored if a discovery chain is active.
-	ClusterJSON string `json:",omitempty" alias:"cluster_json"`
+	EnvoyClusterJSON string `json:",omitempty" alias:"envoy_cluster_json"`
 
 	// Protocol describes the upstream's service protocol. Valid values are "tcp",
 	// "http" and "grpc". Anything else is treated as tcp. The enables protocol

api/config_entry_test.go

@@ -348,8 +348,8 @@ func TestDecodeConfigEntry(t *testing.T) {
 						}
 					},
 					"UpstreamDefaults": {
-						"ClusterJSON": "zip",
-						"ListenerJSON": "zop",
+						"EnvoyClusterJSON": "zip",
+						"EnvoyListenerJSON": "zop",
 						"ConnectTimeoutMs": 5000,
 						"Protocol": "http",
 						"Limits": {
@@ -390,8 +390,8 @@ func TestDecodeConfigEntry(t *testing.T) {
 						},
 					},
 					UpstreamDefaults: UpstreamConfig{
-						ClusterJSON:      "zip",
-						ListenerJSON:     "zop",
+						EnvoyClusterJSON:  "zip",
+						EnvoyListenerJSON: "zop",
 						Protocol:          "http",
 						ConnectTimeoutMs:  5000,
 						Limits: &UpstreamLimits{

command/config/write/config_write_test.go

@@ -451,8 +451,8 @@ func TestParseConfigEntry(t *testing.T) {
 						}
 					}
 					upstream_defaults {
-						cluster_json = "zip"
-						listener_json = "zop"
+						envoy_cluster_json = "zip"
+						envoy_listener_json = "zop"
 						connect_timeout_ms = 5000
 						protocol = "http"
 						limits {
@@ -494,8 +494,8 @@ func TestParseConfigEntry(t *testing.T) {
 						}
 					}
 					upstream_defaults = {
-						cluster_json = "zip"
-						listener_json = "zop"
+						envoy_cluster_json = "zip"
+						envoy_listener_json = "zop"
 						connect_timeout_ms = 5000
 						protocol = "http"
 						limits = {
@@ -538,8 +538,8 @@ func TestParseConfigEntry(t *testing.T) {
 						}
 					},
 					"upstream_defaults": {
-						"cluster_json": "zip",
-						"listener_json": "zop",
+						"envoy_cluster_json": "zip",
+						"envoy_listener_json": "zop",
 						"connect_timeout_ms": 5000,
 						"protocol": "http",
 						"limits": {
@@ -583,8 +583,8 @@ func TestParseConfigEntry(t *testing.T) {
 						}
 					},
 					"UpstreamDefaults": {
-						"ClusterJSON": "zip",
-						"ListenerJSON": "zop",
+						"EnvoyClusterJSON": "zip",
+						"EnvoyListenerJSON": "zop",
 						"ConnectTimeoutMs": 5000,
 						"Protocol": "http",
 						"Limits": {
@@ -627,8 +627,8 @@ func TestParseConfigEntry(t *testing.T) {
 						},
 					},
 					UpstreamDefaults: api.UpstreamConfig{
-						ClusterJSON:      "zip",
-						ListenerJSON:     "zop",
+						EnvoyClusterJSON:  "zip",
+						EnvoyListenerJSON: "zop",
 						Protocol:          "http",
 						ConnectTimeoutMs:  5000,
 						Limits: &api.UpstreamLimits{