chore: remove kube-proxy-rbac

go.mod

@@ -33,10 +33,13 @@ require (
 )
 
 require (
+	cel.dev/expr v0.18.0 // indirect
 	cloud.google.com/go/auth v0.10.2 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.5 // indirect
 	filippo.io/edwards25519 v1.1.0 // indirect
 	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a // indirect
 	github.com/avast/retry-go/v4 v4.6.0 // indirect
 	github.com/aws/aws-sdk-go-v2 v1.32.5 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.7 // indirect
@@ -76,11 +79,13 @@ require (
 	github.com/aws/smithy-go v1.22.1 // indirect
 	github.com/bombsimon/logrusr/v3 v3.1.0 // indirect
 	github.com/boombuler/barcode v1.0.1 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
 	github.com/ericlagergren/decimal v0.0.0-20240411145413-00de7ca16731 // indirect
 	github.com/evanphx/json-patch v5.9.0+incompatible // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
@@ -91,11 +96,13 @@ require (
 	github.com/gonvenience/text v1.0.7 // indirect
 	github.com/gonvenience/wrap v1.1.2 // indirect
 	github.com/gonvenience/ytbx v1.4.4 // indirect
+	github.com/google/cel-go v0.22.0 // indirect
 	github.com/google/gnostic-models v0.6.8 // indirect
 	github.com/google/go-github/v48 v48.2.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/s2a-go v0.1.8 // indirect
 	github.com/gorilla/websocket v1.5.1 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
 	github.com/gruntwork-io/go-commons v0.8.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
@@ -127,6 +134,7 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sergi/go-diff v1.3.1 // indirect
 	github.com/spf13/cobra v1.8.1 // indirect
+	github.com/stoewer/go-strcase v1.3.0 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/texttheater/golang-levenshtein v1.0.1 // indirect
 	github.com/tidwall/gjson v1.18.0 // indirect
@@ -137,8 +145,12 @@ require (
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.54.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0 // indirect
 	go.opentelemetry.io/otel v1.29.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0 // indirect
 	go.opentelemetry.io/otel/metric v1.29.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.29.0 // indirect
 	go.opentelemetry.io/otel/trace v1.29.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
 	golang.org/x/tools v0.26.0 // indirect
@@ -149,6 +161,7 @@ require (
 	k8s.io/component-helpers v0.0.0 // indirect
 	k8s.io/controller-manager v0.0.0 // indirect
 	k8s.io/utils v0.0.0-20241104100929-3ea5e8cea738 // indirect
+	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.0 // indirect
 )
 
 require (

go.sum

@@ -1,3 +1,5 @@
+cel.dev/expr v0.18.0 h1:CJ6drgk+Hf96lkLikr4rFf19WrU0BOWEihyZnI2TAzo=
+cel.dev/expr v0.18.0/go.mod h1:MrpN08Q+lEBs+bGYdLxxHkZoUSsCp0nSKTs0nTymJgw=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.116.0 h1:B3fRrSDkLRt5qSHWe40ERJvhvnQwdZiHu0bJOpldweE=
 cloud.google.com/go v0.116.0/go.mod h1:cEPSRWPzZEswwdr9BxE6ChEn01dWlTaF05LiC2Xs70U=
@@ -22,8 +24,12 @@ github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3Q
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
+github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
+github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
+github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a h1:idn718Q4B6AGu/h5Sxe66HYVdqdGu2l9Iebqhi/AEoA=
+github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/avast/retry-go/v4 v4.6.0 h1:K9xNA+KeB8HHc2aWFuLb25Offp+0iVRXEvFx8IinRJA=
 github.com/avast/retry-go/v4 v4.6.0/go.mod h1:gvWlPhBVsvBbLkVGDg/KwvBv0bEkCOLRRSHKIr2PyOE=
 github.com/aws/aws-sdk-go-v2 v1.32.5 h1:U8vdWJuY7ruAkzaOdD7guwJjD06YSKmnKCJs7s3IkIo=
@@ -215,6 +221,8 @@ github.com/gonvenience/wrap v1.1.2 h1:xPKxNwL1HCguwyM+HlP/1CIuc9LRd7k8RodLwe9YTZ
 github.com/gonvenience/wrap v1.1.2/go.mod h1:GiryBSXoI3BAAhbWD1cZVj7RZmtiu0ERi/6R6eJfslI=
 github.com/gonvenience/ytbx v1.4.4 h1:jQopwyaLsVGuwdxSiN4WkXjsEaFNPJ3V4lUj7eyEpzo=
 github.com/gonvenience/ytbx v1.4.4/go.mod h1:w37+MKCPcCMY/jpPNmEklD4xKqrOAVBO6kIWW2+uI6M=
+github.com/google/cel-go v0.22.0 h1:b3FJZxpiv1vTMo2/5RDUqAHPxkT8mmMfJIrq1llbf7g=
+github.com/google/cel-go v0.22.0/go.mod h1:BuznPXXfQDpXKWQ9sPW3TzlAJN5zzFe+i9tIs0yC4s8=
 github.com/google/certificate-transparency-go v1.1.7 h1:IASD+NtgSTJLPdzkthwvAG1ZVbF2WtFg4IvoA68XGSw=
 github.com/google/certificate-transparency-go v1.1.7/go.mod h1:FSSBo8fyMVgqptbfF6j5p/XNdgQftAhSmXcIxV9iphE=
 github.com/google/gnostic-models v0.6.8 h1:yo/ABAfM5IMRsS1VnXjTBvUb61tFIHozhlYvRgGre9I=
@@ -257,7 +265,6 @@ github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
 github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
 github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
-github.com/grpc-ecosystem/grpc-gateway v1.16.0 h1:gmcG1KaJ57LophUzW0Hy8NmPhnMZb4M0+kPpLofRdBo=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 h1:bkypFPDjIYGfCYD5mRBvpqxfYX1YCS1PXdKYWi8FsN0=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0/go.mod h1:P+Lt/0by1T8bfcF3z737NnSbmxQAppXMRziHUxPOC8k=
 github.com/gruntwork-io/go-commons v0.8.0 h1:k/yypwrPqSeYHevLlEDmvmgQzcyTwrlZGRaxEM6G0ro=
@@ -424,6 +431,8 @@ github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
 github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stoewer/go-strcase v1.3.0 h1:g0eASXYtp+yvN9fK8sH94oCIk0fau9uV1/ZdJ0AVEzs=
+github.com/stoewer/go-strcase v1.3.0/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
@@ -488,6 +497,8 @@ go.opentelemetry.io/otel v1.29.0 h1:PdomN/Al4q/lN6iBJEN3AwPvUiHPMlt93c8bqTG5Llw=
 go.opentelemetry.io/otel v1.29.0/go.mod h1:N/WtXPs1CNCUEx+Agz5uouwCba+i+bJGFicT8SR4NP8=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 h1:3Q/xZUyC1BBkualc9ROb4G8qkH90LXEIICcs5zv1OYY=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0/go.mod h1:s75jGIWA9OfCMzF0xr+ZgfrB5FEbbV7UuYo32ahUiFI=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0 h1:qFffATk0X+HD+f1Z8lswGiOQYKHRlzfmdJm0wEaVrFA=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.27.0/go.mod h1:MOiCmryaYtc+V0Ei+Tx9o5S1ZjA7kzLucuVuyzBZloQ=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.28.0 h1:j9+03ymgYhPKmeXGk5Zu+cIZOlVzd9Zv7QIiyItjFBU=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.28.0/go.mod h1:Y5+XiUG4Emn1hTfciPzGPJaSI+RpDts6BnCIir0SLqk=
 go.opentelemetry.io/otel/metric v1.29.0 h1:vPf/HFWTNkPu1aYeIsc98l4ktOQaL6LeSoeV2g+8YLc=
@@ -689,6 +700,8 @@ k8s.io/utils v0.0.0-20241104100929-3ea5e8cea738 h1:M3sRQVHv7vB20Xc2ybTt7ODCeFj6J
 k8s.io/utils v0.0.0-20241104100929-3ea5e8cea738/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
 oras.land/oras-go/v2 v2.5.0 h1:o8Me9kLY74Vp5uw07QXPiitjsw7qNXi8Twd+19Zf02c=
 oras.land/oras-go/v2 v2.5.0/go.mod h1:z4eisnLP530vwIOUOJeBIj0aGI0L1C3d53atvCBqZHg=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.0 h1:CPT0ExVicCzcpeN4baWEV2ko2Z/AsiZgEdwgcfwLgMo=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.0/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
 sigs.k8s.io/controller-runtime v0.19.3 h1:XO2GvC9OPftRst6xWCpTgBZO04S2cbp0Qqkj8bX1sPw=
 sigs.k8s.io/controller-runtime v0.19.3/go.mod h1:j4j87DqtsThvwTv5/Tc5NFRyyF/RF0ip4+62tbTSIUM=
 sigs.k8s.io/gateway-api v1.2.1 h1:fZZ/+RyRb+Y5tGkwxFKuYuSRQHu9dZtbjenblleOLHM=

modules/cli/cli.go

@@ -22,12 +22,15 @@ func New(m metadata.Info) *CLI {
 
 	var cfg manager.Config
 	var deferCfg flagsForFurtherEvaluation
+	// set default values for MetricsAccessFilter
+	cfg.MetricsAccessFilter = manager.MetricsAccessFilterOff
 
 	flagSet.BoolVar(&cfg.AnonymousReports, "anonymous-reports", true, "Send anonymized usage data to help improve Kong.")
 	flagSet.StringVar(&cfg.APIServerPath, "apiserver-host", "", "The Kubernetes API server URL. If not set, the operator will use cluster config discovery.")
 	flagSet.StringVar(&cfg.KubeconfigPath, "kubeconfig", "", "Path to the kubeconfig file.")
 
 	flagSet.StringVar(&cfg.MetricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
+	flagSet.Var(&cfg.MetricsAccessFilter, "metrics-access-filter", "Specifies the filter access function to be used for accessing the metrics endpoint (possible values: off, rbac).")
 	flagSet.StringVar(&cfg.ProbeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
 	flagSet.BoolVar(&deferCfg.DisableLeaderElection, "no-leader-election", false,
 		"Disable leader election for controller manager. Disabling this will not ensure there is only one active controller manager.")

modules/cli/cli_test.go

@@ -91,6 +91,17 @@ func TestParse(t *testing.T) {
 				return cfg
 			},
 		},
+		{
+			name: "metrics access filter argument is set",
+			args: []string{
+				"--metrics-access-filter=rbac",
+			},
+			expectedCfg: func() manager.Config {
+				cfg := expectedDefaultCfg()
+				cfg.MetricsAccessFilter = "rbac"
+				return cfg
+			},
+		},
 	}
 
 	for _, tC := range testCases {
@@ -145,6 +156,7 @@ func TestParseWithAdditionalFlags(t *testing.T) {
 func expectedDefaultCfg() manager.Config {
 	return manager.Config{
 		MetricsAddr:                             ":8080",
+		MetricsAccessFilter:                     "off",
 		ProbeAddr:                               ":8081",
 		WebhookCertDir:                          "/tmp/k8s-webhook-server/serving-certs",
 		WebhookPort:                             9443,

modules/manager/run.go

@@ -27,6 +27,7 @@ import (
 	"fmt"
 	"math"
 	"math/big"
+	"net/http"
 	"os"
 	"time"
 
@@ -43,6 +44,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	"sigs.k8s.io/controller-runtime/pkg/log/zap"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
 	"sigs.k8s.io/controller-runtime/pkg/metrics/server"
 	"sigs.k8s.io/controller-runtime/pkg/webhook"
 
@@ -57,9 +59,38 @@ const (
 	tlsKeyFilename  = "tls.key"
 )
 
+// MetricsAccessFilter defines the access filter function for the metrics endpoint.
+type MetricsAccessFilter string
+
+// Set implements flag.Value.
+func (mf *MetricsAccessFilter) Set(v string) error {
+	switch v {
+	case string(MetricsAccessFilterOff), string(MetricsAccessFilterRBAC):
+		*mf = MetricsAccessFilter(v)
+	default:
+		return fmt.Errorf("invalid value %q for metrics access filter", v)
+	}
+	return nil
+}
+
+const (
+	// MetricsAccessFilterOff disabled the access filter on metrics endpoint.
+	MetricsAccessFilterOff MetricsAccessFilter = "off"
+	// MetricsAccessFilterRBAC enables the access filter on metrics endpoint.
+	// For more information consult:
+	// https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/metrics/filters#WithAuthenticationAndAuthorization
+	MetricsAccessFilterRBAC MetricsAccessFilter = "rbac"
+)
+
+// String returns the string representation of the MetricsFilter.
+func (mf MetricsAccessFilter) String() string {
+	return string(mf)
+}
+
 // Config represents the configuration for the manager.
 type Config struct {
 	MetricsAddr              string
+	MetricsAccessFilter      MetricsAccessFilter
 	ProbeAddr                string
 	WebhookCertDir           string
 	WebhookPort              int
@@ -107,6 +138,7 @@ func DefaultConfig() Config {
 
 	return Config{
 		MetricsAddr:                   ":8080",
+		MetricsAccessFilter:           MetricsAccessFilterOff,
 		ProbeAddr:                     ":8081",
 		WebhookCertDir:                defaultWebhookCertDir,
 		WebhookPort:                   9443,
@@ -178,6 +210,17 @@ func Run(
 		Scheme: scheme,
 		Metrics: server.Options{
 			BindAddress: cfg.MetricsAddr,
+			FilterProvider: func() func(c *rest.Config, httpClient *http.Client) (server.Filter, error) {
+				switch cfg.MetricsAccessFilter {
+				case MetricsAccessFilterRBAC:
+					return filters.WithAuthenticationAndAuthorization
+				case MetricsAccessFilterOff:
+					return nil
+				default:
+					// This is checked in flags validation so this should never happen.
+					panic("unsupported metrics filter")
+				}
+			}(),
 		},
 		WebhookServer: webhook.NewServer(
 			webhook.Options{