Publish AMD64, ARM64, ARMv7 images for binary

Signed-off-by: Hidde Beydals <hello@hidde.co>

.gitignore

@@ -11,6 +11,9 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
+# Release
+dist/
+
 # Dependency directories (remove the comment below to include it)
 # vendor/
 bin/

.goreleaser.yml

@@ -74,3 +74,64 @@ release:
   extra_files:
     - glob: ./output/manifests.tar.gz
     - glob: ./output/install.yaml
+dockers:
+- image_templates:
+    - 'fluxcd/flux-cli:{{ .Tag }}-amd64'
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-amd64'
+  dockerfile: Dockerfile
+  use_buildx: true
+  goos: linux
+  goarch: amd64
+  build_flag_templates:
+   - "--pull"
+   - "--build-arg=ARCH=linux/amd64"
+   - "--label=org.opencontainers.image.created={{ .Date }}"
+   - "--label=org.opencontainers.image.name={{ .ProjectName }}"
+   - "--label=org.opencontainers.image.revision={{ .FullCommit }}"
+   - "--label=org.opencontainers.image.version={{ .Version }}"
+   - "--label=org.opencontainers.image.source={{ .GitURL }}"
+   - "--platform=linux/amd64"
+- image_templates:
+    - 'fluxcd/flux-cli:{{ .Tag }}-arm64'
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-arm64'
+  dockerfile: Dockerfile
+  use_buildx: true
+  goos: linux
+  goarch: arm64
+  build_flag_templates:
+    - "--pull"
+    - "--build-arg=ARCH=linux/arm64"
+    - "--label=org.opencontainers.image.created={{ .Date }}"
+    - "--label=org.opencontainers.image.name={{ .ProjectName }}"
+    - "--label=org.opencontainers.image.revision={{ .FullCommit }}"
+    - "--label=org.opencontainers.image.version={{ .Version }}"
+    - "--label=org.opencontainers.image.source={{ .GitURL }}"
+    - "--platform=linux/arm64"
+- image_templates:
+    - 'fluxcd/flux-cli:{{ .Tag }}-arm'
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-arm'
+  dockerfile: Dockerfile
+  use_buildx: true
+  goos: linux
+  goarch: arm
+  goarm: 7
+  build_flag_templates:
+    - "--pull"
+    - "--build-arg=ARCH=linux/arm"
+    - "--label=org.opencontainers.image.created={{ .Date }}"
+    - "--label=org.opencontainers.image.name={{ .ProjectName }}"
+    - "--label=org.opencontainers.image.revision={{ .FullCommit }}"
+    - "--label=org.opencontainers.image.version={{ .Version }}"
+    - "--label=org.opencontainers.image.source={{ .GitURL }}"
+    - "--platform=linux/arm/v7"
+docker_manifests:
+- name_template: 'fluxcd/flux-cli:{{ .Tag }}'
+  image_templates:
+    - 'fluxcd/flux-cli:{{ .Tag }}-amd64'
+    - 'fluxcd/flux-cli:{{ .Tag }}-arm64'
+    - 'fluxcd/flux-cli:{{ .Tag }}-arm'
+- name_template: 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}'
+  image_templates:
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-amd64'
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-arm64'
+    - 'ghcr.io/fluxcd/flux-cli:{{ .Tag }}-arm'

Dockerfile

+FROM alpine:3.13 as builder
+
+RUN apk add --no-cache ca-certificates curl
+
+ARG ARCH=linux/amd64
+ARG KUBECTL_VER=1.20.4
+
+RUN curl -sL https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VER}/bin/${ARCH}/kubectl \
+    -o /usr/local/bin/kubectl && chmod +x /usr/local/bin/kubectl && \
+    kubectl version --client=true
+
+FROM alpine:3.13 as flux-cli
+
+# Create minimal nsswitch.conf file to prioritize the usage of /etc/hosts over DNS queries.
+# https://github.com/gliderlabs/docker-alpine/issues/367#issuecomment-354316460
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
+RUN apk add --no-cache ca-certificates
+
+COPY --from=builder /usr/local/bin/kubectl /usr/local/bin/
+COPY --chmod=755 flux /usr/local/bin/
+
+ENTRYPOINT [ "flux" ]