Update to go 1.25 and Kubernetes 1.35

Dockerfile

@@ -1,7 +1,7 @@
 # Update the base image in Makefile when updating golang version. This has to
 # be pre-pulled in order to work on GCB.
 ARG ARCH
-FROM golang:1.24.10 as build
+FROM golang:1.25.6 as build
 
 WORKDIR /go/src/sigs.k8s.io/metrics-server
 COPY go.mod .

Makefile

@@ -81,7 +81,7 @@ CONTAINER_ARCH_TARGETS=$(addprefix container-,$(ALL_ARCHITECTURES))
 container:
 	# Pull base image explicitly. Keep in sync with Dockerfile, otherwise
 	# GCB builds will start failing.
-	${CONTAINER_CLI} pull golang:1.24.10
+	${CONTAINER_CLI} pull golang:1.25.6
 	${CONTAINER_CLI} build -t $(REGISTRY)/metrics-server-$(ARCH):$(CHECKSUM) --build-arg ARCH=$(ARCH) --build-arg GIT_TAG=$(GIT_TAG) --build-arg GIT_COMMIT=$(GIT_COMMIT) .
 
 .PHONY: container-all
@@ -179,10 +179,14 @@ test-image-all:
 # -----------
 
 .PHONY: test-e2e
-test-e2e: test-e2e-1.33
+test-e2e: test-e2e-1.35
 
 .PHONY: test-e2e-all
-test-e2e-all: test-e2e-1.34 test-e2e-1.33 test-e2e-1.32
+test-e2e-all: test-e2e-1.35 test-e2e-1.34 test-e2e-1.33
+
+.PHONY: test-e2e-1.35
+test-e2e-1.35:
+	NODE_IMAGE=kindest/node:v1.35.0@sha256:4613778f3cfcd10e615029370f5786704559103cf27bef934597ba562b269661 KIND_CONFIG="${PWD}/test/kind-config-with-sidecar-containers.yaml" ./test/test-e2e.sh
 
 .PHONY: test-e2e-1.34
 test-e2e-1.34:
@@ -192,10 +196,6 @@ test-e2e-1.34:
 test-e2e-1.33:
 	NODE_IMAGE=kindest/node:v1.33.4@sha256:25a6018e48dfcaee478f4a59af81157a437f15e6e140bf103f85a2e7cd0cbbf2 KIND_CONFIG="${PWD}/test/kind-config-with-sidecar-containers.yaml" ./test/test-e2e.sh
 
-.PHONY: test-e2e-1.32
-test-e2e-1.32:
-	NODE_IMAGE=kindest/node:v1.32.8@sha256:abd489f042d2b644e2d033f5c2d900bc707798d075e8186cb65e3f1367a9d5a1 KIND_CONFIG="${PWD}/test/kind-config-with-sidecar-containers.yaml" ./test/test-e2e.sh
-
 .PHONY: test-e2e-ha
 test-e2e-ha:
 	SKAFFOLD_PROFILE="test-ha" $(MAKE) test-e2e

docs/command-line-flags.txt

@@ -27,6 +27,10 @@ Generic flags:
       --livez-grace-period duration                        This option represents the maximum amount of time it should take for apiserver to complete its startup sequence and become live. From apiserver's start time to when this amount of time has elapsed, /livez will assume that unfinished post-start hooks will complete successfully and therefore return true.
       --max-mutating-requests-inflight int                 This and --max-requests-inflight are summed to determine the server's total concurrency limit (which must be positive) if --enable-priority-and-fairness is true. Otherwise, this flag limits the maximum number of mutating requests in flight, or a zero value disables the limit completely. (default 200)
       --max-requests-inflight int                          This and --max-mutating-requests-inflight are summed to determine the server's total concurrency limit (which must be positive) if --enable-priority-and-fairness is true. Otherwise, this flag limits the maximum number of non-mutating requests in flight, or a zero value disables the limit completely. (default 400)
+      --min-compatibility-version strings                  The min version of control plane components the server should be compatible with.
+                                                           Must be less or equal to the emulated-version. Version format could only be major.minor, for example: '--min-compatibility-version=wardle=1.2,kube=1.31'.
+                                                           Options are:
+                                                           If the component is not specified, defaults to "kube"
       --min-request-timeout int                            An optional field indicating the minimum number of seconds a handler must keep a request open before timing it out. Currently only honored by the watch request handler, which picks a randomized value above this number as the connection timeout, to spread out load. (default 1800)
       --request-timeout duration                           An optional field indicating the duration a handler must keep a request open before timing it out. This is the default request timeout for requests but may be overridden by flags such as --min-request-timeout for specific types of requests. (default 1m0s)
       --runtime-config-emulation-forward-compatible        If true, APIs identified by group/version that are enabled in the --runtime-config flag will be installed even if it is introduced after the emulation version. If false, server would fail to start if any APIs identified by group/version that are enabled in the --runtime-config flag are introduced after the emulation version. Can only be set to true if the emulation version is lower than the binary version.

go.mod

@@ -1,133 +1,139 @@
 module sigs.k8s.io/metrics-server
 
-go 1.24.10
+go 1.25.6
 
 require (
 	github.com/google/go-cmp v0.7.0
-	github.com/onsi/ginkgo/v2 v2.23.4
-	github.com/onsi/gomega v1.38.0
-	github.com/prometheus/common v0.65.0
-	github.com/prometheus/prometheus v0.305.0
-	github.com/spf13/cobra v1.9.1
-	github.com/spf13/pflag v1.0.7
-	k8s.io/api v0.34.0
-	k8s.io/apimachinery v0.34.0
-	k8s.io/apiserver v0.34.0
-	k8s.io/client-go v0.34.0
-	k8s.io/component-base v0.34.0
+	github.com/onsi/ginkgo/v2 v2.27.2
+	github.com/onsi/gomega v1.38.2
+	github.com/prometheus/common v0.67.5
+	github.com/prometheus/prometheus v0.309.1
+	github.com/spf13/cobra v1.10.2
+	github.com/spf13/pflag v1.0.10
+	k8s.io/api v0.35.0
+	k8s.io/apimachinery v0.35.0
+	k8s.io/apiserver v0.35.0
+	k8s.io/client-go v0.35.0
+	k8s.io/component-base v0.35.0
 	k8s.io/klog/v2 v2.130.1
-	k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b
-	k8s.io/metrics v0.34.0
+	k8s.io/kube-openapi v0.0.0-20260127142750-a19766b6e2d4
+	k8s.io/metrics v0.35.0
 )
 
 require (
-	cel.dev/expr v0.24.0 // indirect
-	github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 // indirect
+	cel.dev/expr v0.25.1 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect
 	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/Masterminds/semver/v3 v3.4.0 // indirect
 	github.com/NYTimes/gziphandler v1.1.1 // indirect
 	github.com/aclements/go-moremath v0.0.0-20210112150236-f10218a38794 // indirect
-	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/bmatcuk/doublestar/v4 v4.0.2 // indirect
-	github.com/cenkalti/backoff/v5 v5.0.2 // indirect
+	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/common-nighthawk/go-figure v0.0.0-20210622060536-734e95fb86be // indirect
 	github.com/coreos/go-semver v0.3.1 // indirect
-	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
+	github.com/coreos/go-systemd/v22 v22.7.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
+	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-logr/zapr v1.3.0 // indirect
-	github.com/go-openapi/jsonpointer v0.21.0 // indirect
-	github.com/go-openapi/jsonreference v0.21.0 // indirect
-	github.com/go-openapi/swag v0.23.0 // indirect
+	github.com/go-openapi/jsonpointer v0.22.4 // indirect
+	github.com/go-openapi/jsonreference v0.21.4 // indirect
+	github.com/go-openapi/swag v0.25.4 // indirect
+	github.com/go-openapi/swag/cmdutils v0.25.4 // indirect
+	github.com/go-openapi/swag/conv v0.25.4 // indirect
+	github.com/go-openapi/swag/fileutils v0.25.4 // indirect
+	github.com/go-openapi/swag/jsonname v0.25.4 // indirect
+	github.com/go-openapi/swag/jsonutils v0.25.4 // indirect
+	github.com/go-openapi/swag/loading v0.25.4 // indirect
+	github.com/go-openapi/swag/mangling v0.25.4 // indirect
+	github.com/go-openapi/swag/netutils v0.25.4 // indirect
+	github.com/go-openapi/swag/stringutils v0.25.4 // indirect
+	github.com/go-openapi/swag/typeutils v0.25.4 // indirect
+	github.com/go-openapi/swag/yamlutils v0.25.4 // indirect
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/gomarkdown/markdown v0.0.0-20240328165702-4d01890c35c0 // indirect
 	github.com/google/addlicense v1.1.1 // indirect
 	github.com/google/btree v1.1.3 // indirect
-	github.com/google/cel-go v0.26.0 // indirect
-	github.com/google/gnostic-models v0.7.0 // indirect
-	github.com/google/pprof v0.0.0-20250607225305-033d6d78b36a // indirect
+	github.com/google/cel-go v0.26.1 // indirect
+	github.com/google/gnostic-models v0.7.1 // indirect
+	github.com/google/pprof v0.0.0-20251213031049-b05bdaca462f // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
-	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
+	github.com/grafana/regexp v0.0.0-20250905093917-f7b3be9d1853 // indirect
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.3 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.5 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mmarkdown/mmark v2.0.40+incompatible // indirect
 	github.com/moby/spdystream v0.5.0 // indirect
-	github.com/moby/term v0.5.0 // indirect
+	github.com/moby/term v0.5.2 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.22.0 // indirect
+	github.com/prometheus/client_golang v1.23.2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/stoewer/go-strcase v1.3.0 // indirect
+	github.com/prometheus/procfs v0.19.2 // indirect
+	github.com/stoewer/go-strcase v1.3.1 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
-	go.etcd.io/etcd/api/v3 v3.6.4 // indirect
-	go.etcd.io/etcd/client/pkg/v3 v3.6.4 // indirect
-	go.etcd.io/etcd/client/v3 v3.6.4 // indirect
-	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.60.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.61.0 // indirect
-	go.opentelemetry.io/otel v1.36.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.36.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.36.0 // indirect
-	go.opentelemetry.io/otel/metric v1.36.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.36.0 // indirect
-	go.opentelemetry.io/otel/trace v1.36.0 // indirect
-	go.opentelemetry.io/proto/otlp v1.6.0 // indirect
-	go.uber.org/automaxprocs v1.6.0 // indirect
+	go.etcd.io/etcd/api/v3 v3.6.7 // indirect
+	go.etcd.io/etcd/client/pkg/v3 v3.6.7 // indirect
+	go.etcd.io/etcd/client/v3 v3.6.7 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.64.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.64.0 // indirect
+	go.opentelemetry.io/otel v1.39.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.39.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.39.0 // indirect
+	go.opentelemetry.io/otel/metric v1.39.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.39.0 // indirect
+	go.opentelemetry.io/otel/trace v1.39.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.9.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	go.uber.org/zap v1.27.0 // indirect
-	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	go.uber.org/zap v1.27.1 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/crypto v0.45.0 // indirect
-	golang.org/x/exp v0.0.0-20250106191152-7588d65b2ba8 // indirect
-	golang.org/x/mod v0.29.0 // indirect
-	golang.org/x/net v0.47.0 // indirect
-	golang.org/x/oauth2 v0.30.0 // indirect
+	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
+	golang.org/x/mod v0.32.0 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	golang.org/x/oauth2 v0.34.0 // indirect
 	golang.org/x/perf v0.0.0-20250605212013-b481878a17be // indirect
-	golang.org/x/sync v0.18.0 // indirect
-	golang.org/x/sys v0.38.0 // indirect
-	golang.org/x/term v0.37.0 // indirect
-	golang.org/x/text v0.31.0 // indirect
-	golang.org/x/time v0.12.0 // indirect
-	golang.org/x/tools v0.38.0 // indirect
-	golang.org/x/tools/go/packages/packagestest v0.1.1-deprecated // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20250603155806-513f23925822 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822 // indirect
-	google.golang.org/grpc v1.73.0 // indirect
-	google.golang.org/protobuf v1.36.6 // indirect
-	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/term v0.39.0 // indirect
+	golang.org/x/text v0.33.0 // indirect
+	golang.org/x/time v0.14.0 // indirect
+	golang.org/x/tools v0.41.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 // indirect
+	google.golang.org/grpc v1.78.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/evanphx/json-patch.v4 v4.13.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/gengo/v2 v2.0.0-20250604051438-85fd79dbfd9f // indirect
-	k8s.io/kms v0.34.0 // indirect
-	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397 // indirect
-	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2 // indirect
-	sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 // indirect
+	k8s.io/gengo/v2 v2.0.0-20250922181213-ec3ebc5fd46b // indirect
+	k8s.io/kms v0.35.0 // indirect
+	k8s.io/utils v0.0.0-20260108192941-914a6e750570 // indirect
+	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.34.0 // indirect
+	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/logtools v0.9.0 // indirect
 	sigs.k8s.io/mdtoc v1.4.0 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
 	sigs.k8s.io/release-utils v0.8.3 // indirect
-	sigs.k8s.io/structured-merge-diff/v6 v6.3.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.3.1 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )