feat:kcc: MCL integration

Signed-off-by: Alex Pana <[email protected]>

Author: acpana

cmd/manager/main.go

@@ -62,6 +62,7 @@ func main() {
 		pprofPort                int
 		rateLimitQps             float32
 		rateLimitBurst           int
+		multiClusterElection     bool
 	)
 	flag.StringVar(&prometheusScrapeEndpoint, "prometheus-scrape-endpoint", ":8888", "configure the Prometheus scrape endpoint; :8888 as default")
 	flag.BoolVar(&controllermetrics.ResourceNameLabel, "resource-name-label", false, "option to enable the resource name label on some Prometheus metrics; false by default")
@@ -72,6 +73,7 @@ func main() {
 	flag.IntVar(&pprofPort, "pprof-port", 6060, "The port that the pprof server binds to if enabled.")
 	flag.Float32Var(&rateLimitQps, "qps", 20.0, "The client-side token bucket rate limit qps.")
 	flag.IntVar(&rateLimitBurst, "burst", 30, "The client-side token bucket rate limit burst.")
+	flag.BoolVar(&multiClusterElection, "multi-cluster-election", false, "Enable multi-cluster leader election.")
 	profiler.AddFlag(flag.CommandLine)
 	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
 	flag.Parse()

go.mod

@@ -80,6 +80,7 @@ require (
 	github.com/cenkalti/backoff v2.2.1+incompatible
 	github.com/fatih/color v1.18.0
 	github.com/ghodss/yaml v1.0.0
+	github.com/gke-labs/multicluster-leader-election v0.0.0-20250923220528-0bf41dc7fecc
 	github.com/go-logr/logr v1.4.3
 	github.com/go-logr/zapr v1.3.0
 	github.com/google/go-cmp v0.7.0
@@ -95,13 +96,13 @@ require (
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/onsi/gomega v1.36.1
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.20.4
+	github.com/prometheus/client_golang v1.22.0
 	github.com/prometheus/procfs v0.15.1
 	github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749
 	github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.10.0
+	github.com/stretchr/testify v1.11.0
 	github.com/tmccombs/hcl2json v0.6.7
 	github.com/zclconf/go-cty v1.16.3
 	go.opencensus.io v0.24.0
@@ -119,41 +120,55 @@ require (
 	google.golang.org/protobuf v1.36.7
 	gopkg.in/dnaeon/go-vcr.v3 v3.2.0
 	gopkg.in/yaml.v2 v2.4.0
-	k8s.io/api v0.32.1
-	k8s.io/apiextensions-apiserver v0.32.1
-	k8s.io/apimachinery v0.32.1
-	k8s.io/client-go v0.32.1
+	k8s.io/api v0.33.0
+	k8s.io/apiextensions-apiserver v0.33.0
+	k8s.io/apimachinery v0.33.0
+	k8s.io/client-go v0.33.0
 	k8s.io/klog/v2 v2.130.1
-	sigs.k8s.io/controller-runtime v0.20.4
+	sigs.k8s.io/controller-runtime v0.21.0
 	sigs.k8s.io/controller-tools v0.16.5
+	sigs.k8s.io/kind v0.30.0
 	sigs.k8s.io/kubebuilder-declarative-pattern v0.20.0-beta.1.0.20250514194322-871029137730
 	sigs.k8s.io/kubebuilder-declarative-pattern/mockkubeapiserver v0.0.0-20230303024857-d1f76c15e05b
-	sigs.k8s.io/structured-merge-diff/v4 v4.4.2
+	sigs.k8s.io/structured-merge-diff/v4 v4.6.0
 	sigs.k8s.io/yaml v1.4.0
 )
 
 require go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 
 require (
+	al.essio.dev/pkg/shellescape v1.5.1 // indirect
 	cloud.google.com/go/osconfig v1.14.6 // indirect
+	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/envoyproxy/go-control-plane/envoy v1.32.4 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/go-jose/go-jose/v4 v4.0.5 // indirect
 	github.com/google/flatbuffers v24.3.25+incompatible // indirect
-	github.com/google/gnostic-models v0.6.8 // indirect
-	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/google/gnostic-models v0.6.9 // indirect
+	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
+	github.com/minio/crc64nvme v1.0.2 // indirect
+	github.com/minio/md5-simd v1.1.2 // indirect
+	github.com/minio/minio-go/v7 v7.0.95 // indirect
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
+	github.com/philhofer/fwd v1.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/rs/xid v1.6.0 // indirect
 	github.com/spiffe/go-spiffe/v2 v2.5.0 // indirect
+	github.com/tinylib/msgp v1.3.0 // indirect
 	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/zeebo/errs v1.4.0 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/telemetry v0.0.0-20250908211612-aef8a434d053 // indirect
 	golang.org/x/tools/godoc v0.1.0-deprecated // indirect
 	gonum.org/v1/gonum v0.16.0 // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
 	sigs.k8s.io/kubebuilder-declarative-pattern/ktest v0.0.0-20250514194322-871029137730 // indirect
+	sigs.k8s.io/randfill v1.0.0 // indirect
 )
 
 require (
@@ -200,14 +215,13 @@ require (
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/swag v0.23.0 // indirect
 	github.com/gobuffalo/flect v1.0.3 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/glog v1.2.5 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.4
 	github.com/google/btree v1.1.3 // indirect
 	github.com/google/go-cpy v0.0.0-20211218193943-a9c933c06932 // indirect
-	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/pprof v0.0.0-20241029153458-d1b30febd7db // indirect
 	github.com/google/s2a-go v0.1.9 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
@@ -239,7 +253,7 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
-	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
@@ -265,7 +279,7 @@ require (
 	github.com/pjbgf/sha1cd v0.3.2 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.59.1 // indirect
+	github.com/prometheus/common v0.62.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
@@ -299,8 +313,8 @@ require (
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/cli-runtime v0.32.1 // indirect
-	k8s.io/component-base v0.32.1 // indirect
-	k8s.io/kube-openapi v0.0.0-20241105132330-32ad38e42d3f // indirect
+	k8s.io/component-base v0.33.0 // indirect
+	k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff // indirect
 	k8s.io/kubectl v0.32.1 // indirect
 	k8s.io/utils v0.0.0-20241104100929-3ea5e8cea738
 	sigs.k8s.io/json v0.0.0-20241010143419-9aa6b5e7a4b3 // indirect