Upgrade Go version to v1.20 (#583)

Signed-off-by: Yuki Iwai <yuki.iwai.tz@gmail.com>

.github/workflows/golangci-lint.yml

@@ -18,6 +18,6 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.50.1
-          args: --timeout=5m --go=1.19
+          version: v1.53.3
+          args: --timeout=5m --go=1.20
           only-new-issues: true

CONTRIBUTING.md

@@ -24,7 +24,7 @@ git clone https://github.com/${GITHUB_USER}/mpi-operator.git
 
 ## Install Dependencies
 
-We use Go v1.19+ for development and use [Go Modules](https://blog.golang.org/using-go-modules) to download and install the dependencies.
+We use Go v1.20+ for development and use [Go Modules](https://blog.golang.org/using-go-modules) to download and install the dependencies.
 
 ## Run tests
 

Dockerfile

@@ -1,4 +1,6 @@
-FROM golang:1.19 AS build
+# TODO: Once the gcr.io/distroless/base-debian12 is released, we can use `golang:1.20` as a base image.
+# REF: https://github.com/GoogleContainerTools/distroless/issues/1342
+FROM golang:1.20-bullseye AS build
 
 # Set mpi-operator version
 # Defaults to v2
@@ -10,7 +12,7 @@ WORKDIR /go/src/github.com/kubeflow/mpi-operator
 RUN make RELEASE_VERSION=${RELEASE_VERSION} mpi-operator.$VERSION
 RUN ln -s mpi-operator.${VERSION} _output/cmd/bin/mpi-operator
 
-FROM gcr.io/distroless/base-debian10:latest
+FROM gcr.io/distroless/base-debian11:latest
 
 ENV CONTROLLER_VERSION=$VERSION
 COPY --from=build /go/src/github.com/kubeflow/mpi-operator/_output/cmd/bin/* /opt/

Makefile

@@ -117,11 +117,11 @@ test_images:
 
 .PHONY: tidy
 tidy:
-	go mod tidy -go 1.19
+	go mod tidy -go 1.20
 
 .PHONY: lint
 lint: bin/golangci-lint ## Run golangci-lint linter
-	$(GOLANGCI_LINT) run --new-from-rev=origin/master --go 1.19
+	$(GOLANGCI_LINT) run --new-from-rev=origin/master --go 1.20
 
 # Generate deploy/v2beta1/mpi-operator.yaml
 manifest: kustomize crd
@@ -138,7 +138,7 @@ bin:
 GOLANGCI_LINT = $(shell pwd)/bin/golangci-lint
 .PHONY: bin/golangci-lint
 bin/golangci-lint: bin
-	@GOBIN=$(PROJECT_DIR)/bin go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50.1
+	@GOBIN=$(PROJECT_DIR)/bin go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.53.3
 
 ENVTEST = $(shell pwd)/bin/setup-envtest
 .PHONY: envtest

go.mod

@@ -1,6 +1,6 @@
 module github.com/kubeflow/mpi-operator
 
-go 1.19
+go 1.20
 
 require (
 	github.com/google/go-cmp v0.5.9