Add generic experiments configuration and use it to enable catalog v2 resources (#17604)

* Add generic experiments configuration and use it to enable catalog v2 resources

* Run formatting with -s as CI will validate that this has been done

GNUmakefile

@@ -337,7 +337,7 @@ fmt: $(foreach mod,$(GO_MODULES),fmt/$(mod))
 .PHONY: fmt/%
 fmt/%:
 	@echo "--> Running go fmt ($*)"
-	@cd $* && go fmt ./...
+	@cd $* && gofmt -s -l -w .
 
 .PHONY: lint
 lint: $(foreach mod,$(GO_MODULES),lint/$(mod)) lint-container-test-deps

agent/config/builder.go

@@ -828,6 +828,7 @@ func (b *builder) build() (rt RuntimeConfig, err error) {
 		Version:                    stringVal(c.Version),
 		VersionPrerelease:          stringVal(c.VersionPrerelease),
 		VersionMetadata:            stringVal(c.VersionMetadata),
+		Experiments:                c.Experiments,
 		// What is a sensible default for BuildDate?
 		BuildDate: timeValWithDefault(c.BuildDate, time.Date(1970, 1, 00, 00, 00, 01, 0, time.UTC)),
 

agent/config/config.go

@@ -183,6 +183,7 @@ type Config struct {
 	EncryptKey                       *string             `mapstructure:"encrypt" json:"encrypt,omitempty"`
 	EncryptVerifyIncoming            *bool               `mapstructure:"encrypt_verify_incoming" json:"encrypt_verify_incoming,omitempty"`
 	EncryptVerifyOutgoing            *bool               `mapstructure:"encrypt_verify_outgoing" json:"encrypt_verify_outgoing,omitempty"`
+	Experiments                      []string            `mapstructure:"experiments" json:"experiments,omitempty"`
 	GossipLAN                        GossipLANConfig     `mapstructure:"gossip_lan" json:"-"`
 	GossipWAN                        GossipWANConfig     `mapstructure:"gossip_wan" json:"-"`
 	HTTPConfig                       HTTPConfig          `mapstructure:"http_config" json:"-"`

agent/config/default.go

@@ -209,6 +209,9 @@ func DevSource() Source {
 		ports = {
 			grpc = 8502
 		}
+		experiments = [
+			"resource-apis"
+		]
 	`,
 	}
 }

agent/config/runtime.go

@@ -1498,6 +1498,9 @@ type RuntimeConfig struct {
 
 	Reporting ReportingConfig
 
+	// List of experiments to enable
+	Experiments []string
+
 	EnterpriseRuntimeConfig
 }
 

agent/config/runtime_test.go

@@ -325,6 +325,7 @@ func TestLoad_IntegrationWithFlags(t *testing.T) {
 			rt.DisableAnonymousSignature = true
 			rt.DisableKeyringFile = true
 			rt.EnableDebug = true
+			rt.Experiments = []string{"resource-apis"}
 			rt.UIConfig.Enabled = true
 			rt.LeaveOnTerm = false
 			rt.Logging.LogLevel = "DEBUG"
@@ -6355,6 +6356,7 @@ func TestLoad_FullConfig(t *testing.T) {
 		EnableRemoteScriptChecks:         true,
 		EnableLocalScriptChecks:          true,
 		EncryptKey:                       "A4wELWqH",
+		Experiments:                      []string{"foo"},
 		StaticRuntimeConfig: StaticRuntimeConfig{
 			EncryptVerifyIncoming: true,
 			EncryptVerifyOutgoing: true,

agent/config/testdata/TestRuntimeConfig_Sanitize.golden

@@ -199,6 +199,7 @@
     "EnableRemoteScriptChecks": false,
     "EncryptKey": "hidden",
     "EnterpriseRuntimeConfig": {},
+    "Experiments": [],
     "ExposeMaxPort": 0,
     "ExposeMinPort": 0,
     "GRPCAddrs": [],

agent/config/testdata/full-config.hcl

@@ -285,6 +285,9 @@ enable_syslog = true
 encrypt = "A4wELWqH"
 encrypt_verify_incoming = true
 encrypt_verify_outgoing = true
+experiments = [
+    "foo"
+]
 http_config {
     block_endpoints = [ "RBvAFcGD", "fWOWFznh" ]
     allow_write_http_from = [ "127.0.0.1/8", "22.33.44.55/32", "0.0.0.0/0" ]

agent/config/testdata/full-config.json

@@ -327,6 +327,9 @@
   "encrypt": "A4wELWqH",
   "encrypt_verify_incoming": true,
   "encrypt_verify_outgoing": true,
+  "experiments": [
+    "foo"
+  ],
   "http_config": {
     "block_endpoints": [
       "RBvAFcGD",
@@ -407,11 +410,11 @@
   "raft_snapshot_interval": "30s",
   "raft_trailing_logs": 83749,
   "raft_logstore": {
-    "backend" : "wal",
+    "backend": "wal",
     "disable_log_cache": true,
     "verification": {
       "enabled": true,
-        "interval":"12345s"
+      "interval": "12345s"
     },
     "boltdb": {
       "no_freelist_sync": true

agent/consul/options.go

@@ -39,6 +39,8 @@ type Deps struct {
 	// HCP contains the dependencies required when integrating with the HashiCorp Cloud Platform
 	HCP hcp.Deps
 
+	Experiments []string
+
 	EnterpriseDeps
 }
 

agent/consul/server.go

@@ -79,6 +79,7 @@ import (
 	raftstorage "github.com/hashicorp/consul/internal/storage/raft"
 	"github.com/hashicorp/consul/lib"
 	"github.com/hashicorp/consul/lib/routine"
+	"github.com/hashicorp/consul/lib/stringslice"
 	"github.com/hashicorp/consul/logging"
 	"github.com/hashicorp/consul/proto-public/pbresource"
 	"github.com/hashicorp/consul/proto/private/pbsubscribe"
@@ -131,6 +132,8 @@ const (
 	reconcileChSize = 256
 
 	LeaderTransferMinVersion = "1.6.0"
+
+	catalogResourceExperimentName = "resource-apis"
 )
 
 const (
@@ -807,7 +810,7 @@ func NewServer(config *Config, flat Deps, externalGRPCServer *grpc.Server, incom
 		s.internalResourceServiceClient,
 		logger.Named(logging.ControllerRuntime),
 	)
-	s.registerResources()
+	s.registerResources(flat)
 	go s.controllerManager.Run(&lib.StopChannelContext{StopCh: shutdownCh})
 
 	go s.trackLeaderChanges()
@@ -858,11 +861,14 @@ func NewServer(config *Config, flat Deps, externalGRPCServer *grpc.Server, incom
 	return s, nil
 }
 
-func (s *Server) registerResources() {
+func (s *Server) registerResources(deps Deps) {
+	if stringslice.Contains(deps.Experiments, catalogResourceExperimentName) {
 		catalog.RegisterTypes(s.typeRegistry)
 		catalog.RegisterControllers(s.controllerManager, catalog.DefaultControllerDependencies())
 
 		mesh.RegisterTypes(s.typeRegistry)
+	}
+
 	reaper.RegisterControllers(s.controllerManager)
 
 	if s.config.DevMode {

agent/setup.go

@@ -73,6 +73,7 @@ func NewBaseDeps(configLoader ConfigLoader, logOut io.Writer, providedLogger hcl
 		return d, err
 	}
 	d.WatchedFiles = result.WatchedFiles
+	d.Experiments = result.RuntimeConfig.Experiments
 	cfg := result.RuntimeConfig
 	logConf := cfg.Logging
 	logConf.Name = logging.Agent