CI: Automate updating flannel

.github/workflows/update-flannel-version.yml

@@ -0,0 +1,49 @@
+name: "update-flannel-version"
+on:
+  workflow_dispatch:
+  schedule:
+    # every Monday at around 3 am pacific/10 am UTC
+    - cron: "0 10 * * 1"
+env:
+  GOPROXY: https://proxy.golang.org
+  GO_VERSION: '1.20.4'
+permissions:
+  contents: read
+
+jobs:
+  bump-flannel-version:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
+      - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753
+        with:
+          go-version: ${{env.GO_VERSION}}
+          cache-dependency-path: ./go.sum
+      - name: Bump flannel version
+        id: bumpFlannel
+        run: |
+          echo "OLD_VERSION=$(DEP=flannel make get-dependency-version)" >> $GITHUB_OUTPUT
+          make update-flannel-version
+          echo "NEW_VERSION=$(DEP=flannel make get-dependency-version)" >> $GITHUB_OUTPUT
+          # The following is to support multiline with GITHUB_OUTPUT, see https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#multiline-strings
+          echo "changes<<EOF" >> $GITHUB_OUTPUT
+          echo "$(git status --porcelain)" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+      - name: Create PR
+        if: ${{ steps.bumpFlannel.outputs.changes != '' }}
+        uses: peter-evans/create-pull-request@284f54f989303d2699d373481a0cfa13ad5a6666
+        with:
+          token: ${{ secrets.MINIKUBE_BOT_PAT }}
+          commit-message: 'CNI: Update flannel from ${{ steps.bumpFlannel.outputs.OLD_VERSION }} to ${{ steps.bumpFlannel.outputs.NEW_VERSION }}'
+          committer: minikube-bot <minikube-bot@google.com>
+          author: minikube-bot <minikube-bot@google.com>
+          branch: auto_bump_flannel_version
+          push-to-fork: minikube-bot/minikube
+          base: master
+          delete-branch: true
+          title: 'CNI: Update flannel from ${{ steps.bumpFlannel.outputs.OLD_VERSION }} to ${{ steps.bumpFlannel.outputs.NEW_VERSION }}'
+          labels: ok-to-test
+          body: |
+            The flannel project released a [new version](https://github.com/projectflannel/flannel)
+
+            This PR was auto-generated by `make update-flannel-version` using [update-flannel-version.yml](https://github.com/kubernetes/minikube/tree/master/.github/workflows/update-flannel-version.yml) CI Workflow.

Makefile

@@ -1128,6 +1128,11 @@ update-ingress-version:
 	(cd hack/update/ingress_version && \
 	 go run update_ingress_version.go)
 
+.PHONY: update-flannel-version
+update-flannel-version:
+	(cd hack/update/flannel_version && \
+	 go run update_flannel_version.go)
+
 .PHONY: get-dependency-verison
 get-dependency-version:
 	@(cd hack/update/get_version && \

hack/update/flannel_version/update_flannel_version.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2023 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"regexp"
+	"time"
+
+	"k8s.io/klog/v2"
+	"k8s.io/minikube/hack/update"
+)
+
+func main() {
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
+	defer cancel()
+
+	stable, _, _, err := update.GHReleases(ctx, "flannel-io", "flannel")
+	if err != nil {
+		klog.Fatalf("Unable to get stable version: %v", err)
+	}
+
+	updateYAML(stable.Tag)
+}
+
+func updateYAML(version string) {
+	res, err := http.Get(fmt.Sprintf("https://raw.githubusercontent.com/flannel-io/flannel/%s/Documentation/kube-flannel.yml", version))
+	if err != nil {
+		klog.Fatalf("failed to get kube-flannel.yaml: %v", err)
+	}
+	defer res.Body.Close()
+	body, err := io.ReadAll(res.Body)
+	if err != nil {
+		klog.Fatalf("failed to read body: %v", err)
+	}
+	yaml := regexp.MustCompile(`10\.244\.0\.0\/16`).ReplaceAll(body, []byte("{{ .PodCIDR }}"))
+	if err := os.WriteFile("../../../pkg/minikube/cni/flannel.yaml", yaml, 0644); err != nil {
+		klog.Fatalf("failed to write to YAML file: %v", err)
+	}
+}

hack/update/get_version/get_version.go

@@ -34,6 +34,7 @@ var dependencies = map[string]dependency{
 	"containerd":     {"deploy/iso/minikube-iso/arch/x86_64/package/containerd-bin/containerd-bin.mk", `CONTAINERD_BIN_VERSION = (.*)`},
 	"cri-o":          {"deploy/iso/minikube-iso/package/crio-bin/crio-bin.mk", `CRIO_BIN_VERSION = (.*)`},
 	"docker":         {"deploy/iso/minikube-iso/arch/x86_64/package/docker-bin/docker-bin.mk", `DOCKER_BIN_VERSION = (.*)`},
+	"flannel":        {"pkg/minikube/cni/flannel.yaml", `flannel:(.*)`},
 	"gcp-auth":       {"pkg/minikube/assets/addons.go", `k8s-minikube/gcp-auth-webhook:(.*)@`},
 	"gh":             {"hack/jenkins/installers/check_install_gh.sh", `GH_VERSION="(.*)"`},
 	"go":             {"Makefile", `GO_VERSION \?= (.*)`},

hack/update/golang_version/update_golang_version.go

@@ -53,6 +53,7 @@ var (
 		".github/workflows/update-cri-o-version.yml":                  workflowReplace,
 		".github/workflows/update-docker-version.yml":                 workflowReplace,
 		".github/workflows/update-docsy-version.yml":                  workflowReplace,
+		".github/workflows/update-flannel-version.yml":                workflowReplace,
 		".github/workflows/update-gcp-auth-version.yml":               workflowReplace,
 		".github/workflows/update-gh-version.yml":                     workflowReplace,
 		".github/workflows/update-golang-version.yml":                 workflowReplace,