Switching to docker buildx to build multi arch image

Signed-off-by: cmoulliard <cmoulliard@redhat.com>

.github/workflows/build-push-image-commit.yaml

@@ -4,18 +4,22 @@ on:
  branches: [ main ]
  push:
  branches:
- - main
+ #- main
+ - 'issue-*'
 jobs:
  build_push_image:
  runs-on: ubuntu-latest
  steps:
  - name: Checkout
  uses: actions/checkout@v2
 
- - name: Install go 1.16
- uses: actions/setup-go@v2
- with:
- go-version: 1.16
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v2
+
+ #- name: Install go 1.16
+ # uses: actions/setup-go@v2
+ # with:
+ # go-version: 1.16
 
  - name: Login to Quay.io Hub
  uses: docker/login-action@v1
@@ -27,7 +31,7 @@ jobs:
  - name: Build the container image
  run: |
  VERSION=$(git rev-parse --short HEAD 2>/dev/null)
- docker build -t cert-manager-webhook-godaddy:${VERSION} -f Dockerfile .
+ docker buildx build --platform linux/amd64,linux/arm64 -t cert-manager-webhook-godaddy:${VERSION} -f Dockerfile .
 
  TAG_ID=$(docker images -q cert-manager-webhook-godaddy:${VERSION})
  docker tag ${TAG_ID} quay.io/snowdrop/cert-manager-webhook-godaddy:${VERSION}

.github/workflows/release.yml

@@ -20,6 +20,9 @@ jobs:
  with:
  fetch-depth: 0
 
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@v2
+
  - name: Configure Git
  run: |
  git config user.name "$GITHUB_ACTOR"

Dockerfile

@@ -4,7 +4,9 @@ WORKDIR /go/src/webhook-app
 COPY . .
 RUN --mount=type=cache,target=$HOME/go/pkg/mod go mod download
 
-RUN CGO_ENABLED=0 go build -o /webhook-app -ldflags '-w -extldflags "-static"' .
+ARG TARGETOS
+ARG TARGETARCH
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /webhook-app -ldflags '-w -extldflags "-static"' .
 
 FROM alpine:3