feat: configure HTTP transport for persistent connections to kube-apiserver

.github/release-drafter.yml

@@ -1,30 +1,30 @@
-name-template: 'v$RESOLVED_VERSION'
-tag-template: 'v$RESOLVED_VERSION'
+name-template: "v$RESOLVED_VERSION"
+tag-template: "v$RESOLVED_VERSION"
 
 template: |
   ## General Changes
 
   $CHANGES
 
 categories:
-- title: '🚀 Features'
-  labels:
-  - 'feature'
-  - 'enhancement'
-- title: '🐛 Bug Fixes'
-  labels:
-  - 'fix'
-  - 'bugfix'
-  - 'bug'
+  - title: "🚀 Features"
+    labels:
+      - "feature"
+      - "enhancement"
+  - title: "🐛 Bug Fixes"
+    labels:
+      - "fix"
+      - "bugfix"
+      - "bug"
 
 version-resolver:
   major:
     labels:
-    - 'major'
+      - "major"
   minor:
     labels:
-    - 'minor'
+      - "minor"
   patch:
     labels:
-    - 'patch'
+      - "patch"
   default: patch

.github/workflows/docker.yaml

@@ -21,39 +21,39 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Log in to the container registry
-      uses: docker/login-action@v3
-      with:
-        registry: ${{ env.REGISTRY }}
-        username: ${{ secrets.DOCKER_REGISTRY_USER }}
-        password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}
-
-    - name: Checkout
-      uses: actions/checkout@v4
-
-    - name: Set up Go
-      uses: actions/setup-go@v5
-      with:
-        go-version-file: 'go.mod'
-
-    - name: Lint
-      uses: golangci/golangci-lint-action@v7
-      with:
-        args: --build-tags integration --timeout=10m
-
-    - name: Make tag
-      run: |
-        [ "${GITHUB_EVENT_NAME}" == 'pull_request' ] && echo "tag=${GITHUB_HEAD_REF##*/}" >> $GITHUB_ENV || true
-        [ "${GITHUB_EVENT_NAME}" == 'release' ] && echo "tag=${GITHUB_REF##*/}" >> $GITHUB_ENV || true
-        [ "${GITHUB_EVENT_NAME}" == 'push' ] && echo "tag=latest" >> $GITHUB_ENV || true
-
-    - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v3
-
-    - name: Build and push image
-      uses: docker/build-push-action@v6
-      with:
-        context: .
-        push: true
-        sbom: true
-        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.tag }}
+      - name: Log in to the container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.DOCKER_REGISTRY_USER }}
+          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}
+
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: "go.mod"
+
+      - name: Lint
+        uses: golangci/golangci-lint-action@v9
+        with:
+          args: --build-tags integration --timeout=10m
+
+      - name: Make tag
+        run: |
+          [ "${GITHUB_EVENT_NAME}" == 'pull_request' ] && echo "tag=${GITHUB_HEAD_REF##*/}" >> $GITHUB_ENV || true
+          [ "${GITHUB_EVENT_NAME}" == 'release' ] && echo "tag=${GITHUB_REF##*/}" >> $GITHUB_ENV || true
+          [ "${GITHUB_EVENT_NAME}" == 'push' ] && echo "tag=latest" >> $GITHUB_ENV || true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          sbom: true
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.tag }}

.github/workflows/release-drafter.yaml

@@ -10,6 +10,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: release-drafter/release-drafter@v5
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - uses: release-drafter/release-drafter@v6
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.24-alpine as builder
+FROM golang:1.26-alpine AS builder
 RUN apk add make binutils
 
 COPY / /work

Makefile

@@ -19,4 +19,3 @@ dockerpush:
 .PHONY: clean
 clean:
 	rm -f bin/*
-

cmd/init.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net"
+	"net/http"
 	"os"
 	"time"
 
@@ -54,6 +55,14 @@ func initNetwork(_ []string) error {
 		klog.Fatalln(err.Error())
 	}
 
+	// Configure HTTP transport to keep connections alive longer than reconcileInterval
+	config.WrapTransport = func(rt http.RoundTripper) http.RoundTripper {
+		if transport, ok := rt.(*http.Transport); ok {
+			transport.IdleConnTimeout = reconcileInterval + 1*time.Minute
+		}
+		return rt
+	}
+
 	// create the clientset
 	c, err := kubernetes.NewForConfig(config)
 	if err != nil {

go.mod

@@ -1,67 +1,69 @@
 module github.com/metal-stack/node-init
 
-go 1.24
+go 1.26
 
 require (
-	github.com/spf13/cobra v1.9.1
-	github.com/spf13/viper v1.20.1
-	github.com/vishvananda/netlink v1.3.0
-	k8s.io/apimachinery v0.32.3
-	k8s.io/client-go v0.32.3
+	github.com/spf13/cobra v1.10.2
+	github.com/spf13/viper v1.21.0
+	github.com/vishvananda/netlink v1.3.1
+	k8s.io/apimachinery v0.35.1
+	k8s.io/client-go v0.35.1
 	k8s.io/klog/v2 v2.130.1
-	sigs.k8s.io/controller-runtime v0.20.4
+	sigs.k8s.io/controller-runtime v0.23.1
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
-	github.com/fsnotify/fsnotify v1.8.0 // indirect
-	github.com/fxamacker/cbor/v2 v2.8.0 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
-	github.com/go-openapi/jsonpointer v0.21.1 // indirect
-	github.com/go-openapi/jsonreference v0.21.0 // indirect
-	github.com/go-openapi/swag v0.23.1 // indirect
-	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/google/gnostic-models v0.6.9 // indirect
-	github.com/google/go-cmp v0.7.0 // indirect
-	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/go-logr/logr v1.4.3 // 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-viper/mapstructure/v2 v2.5.0 // indirect
+	github.com/google/gnostic-models v0.7.1 // indirect
 	github.com/google/uuid v1.6.0 // 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/mailru/easyjson v0.9.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // 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/pelletier/go-toml/v2 v2.2.3 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/sagikazarmark/locafero v0.9.0 // indirect
-	github.com/sourcegraph/conc v0.3.0 // indirect
-	github.com/spf13/afero v1.14.0 // indirect
-	github.com/spf13/cast v1.7.1 // indirect
-	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/sagikazarmark/locafero v0.12.0 // indirect
+	github.com/spf13/afero v1.15.0 // indirect
+	github.com/spf13/cast v1.10.0 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/vishvananda/netns v0.0.5 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
-	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/net v0.38.0 // indirect
-	golang.org/x/oauth2 v0.28.0 // indirect
-	golang.org/x/sys v0.31.0 // indirect
-	golang.org/x/term v0.30.0 // indirect
-	golang.org/x/text v0.23.0 // indirect
-	golang.org/x/time v0.11.0 // indirect
-	golang.org/x/tools v0.30.0 // indirect
-	google.golang.org/protobuf v1.36.6 // indirect
-	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/net v0.50.0 // indirect
+	golang.org/x/oauth2 v0.35.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
+	golang.org/x/term v0.40.0 // indirect
+	golang.org/x/text v0.34.0 // indirect
+	golang.org/x/time v0.14.0 // 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/yaml.v3 v3.0.1 // indirect
-	k8s.io/api v0.32.3 // indirect
-	k8s.io/kube-openapi v0.0.0-20250318190949-c8a335a9a2ff // indirect
-	k8s.io/utils v0.0.0-20250321185631-1f6e0b77f77e // indirect
-	sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 // indirect
+	k8s.io/api v0.35.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20260127142750-a19766b6e2d4 // indirect
+	k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2 // indirect
+	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v4 v4.6.0 // indirect
-	sigs.k8s.io/yaml v1.4.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.3.2 // indirect
+	sigs.k8s.io/yaml v1.6.0 // indirect
 )