Bump go version to 1.21

.github/workflows/apidiff.yaml

@@ -8,8 +8,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    # Do not bump go version joelanford/go-apidiff is build with go 1.18
     - uses: actions/setup-go@v5
       with:
-        go-version: 1.19
+        go-version: 1.21.x
     - uses: joelanford/go-apidiff@main

.github/workflows/build.yaml

@@ -13,6 +13,6 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.20.x
+          go-version: 1.21.x
       - name: Build GKE operator binary
         run: make operator

.github/workflows/e2e.yaml

@@ -58,7 +58,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.20.x
+          go-version: 1.21.x
       - uses: engineerd/[email protected]
         with:
           version: "v0.16.0"

.github/workflows/lint.yaml

@@ -15,8 +15,9 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: 1.20.x
+          go-version: 1.21.x
       - name: Analysis
         uses: golangci/golangci-lint-action@v3
         with:
           args: -v
+          skip-pkg-cache: true

.github/workflows/unit.yaml

@@ -12,7 +12,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.20.x
+        go-version: 1.21.x
     - name: Run tests
       run: |
         make test

.github/workflows/verify.yaml

@@ -12,7 +12,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.20.x
+        go-version: 1.21.x
     - name: Run make verify
       run: |
         make verify

Dockerfile.dapper

@@ -8,7 +8,7 @@ RUN zypper -n update && \
 
 ENV GOLANG_ARCH_amd64=amd64 GOLANG_ARCH_arm=armv6l GOLANG_ARCH_arm64=arm64 GOLANG_ARCH=GOLANG_ARCH_${ARCH} \
     GOPATH=/go PATH=/go/bin:/usr/local/go/bin:${PATH} SHELL=/bin/bash
-RUN curl -sLf https://go.dev/dl/go1.20.7.linux-${ARCH}.tar.gz | tar -xzf - -C /usr/local/
+RUN curl -sLf https://go.dev/dl/go1.21.7.linux-${ARCH}.tar.gz | tar -xzf - -C /usr/local/
 # workaround for https://bugzilla.suse.com/show_bug.cgi?id=1183043
 RUN if [ "${ARCH}" == "arm64" ]; then \
         zypper -n install binutils-gold ; \

go.mod

@@ -2,6 +2,8 @@ module github.com/rancher/gke-operator
 
 go 1.21
 
+toolchain go1.21.6
+
 replace (
 	k8s.io/client-go => k8s.io/client-go v0.28.6
 	k8s.io/kube-openapi => k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9

test/e2e/Dockerfile.e2e

@@ -1,4 +1,4 @@
-FROM registry.suse.com/bci/golang:1.20 AS build
+FROM registry.suse.com/bci/golang:1.21 AS build
 RUN zypper -n install -l openssl-devel
 WORKDIR /src
 COPY go.mod go.sum /src/
@@ -21,4 +21,4 @@ RUN go build  \
 FROM scratch AS gke-operator
 COPY --from=build /var/lib/ca-certificates/ca-bundle.pem /etc/ssl/certs/ca-certificates.crt
 COPY --from=build-operator /usr/sbin/gke-operator /usr/sbin/gke-operator
-ENTRYPOINT ["/usr/sbin/gke-operator"]
+ENTRYPOINT ["/usr/sbin/gke-operator"]

test/e2e/config/config.go

@@ -129,15 +129,15 @@ func ReadE2EConfig(configPath string) (*E2EConfig, error) { //nolint:gocyclo
 }
 
 func substituteVersions(config *E2EConfig) error {
-	certManagerURL, err := envsubst.Eval(config.CertManagerChartURL, func(s string) string {
+	certManagerURL, err := envsubst.Eval(config.CertManagerChartURL, func(_ string) string {
 		return config.CertManagerVersion
 	})
 	if err != nil {
 		return fmt.Errorf("failed to substitute cert manager chart url: %w", err)
 	}
 	config.CertManagerChartURL = certManagerURL
 
-	rancherURL, err := envsubst.Eval(config.RancherChartURL, func(s string) string {
+	rancherURL, err := envsubst.Eval(config.RancherChartURL, func(_ string) string {
 		return config.RancherVersion
 	})
 	if err != nil {