build buildx

.github/workflows/build-image.yml

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+name: build-image
+
+on:
+  push:
+    branches:
+      - "image-buildx"
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - uses: docker/setup-qemu-action@v1
+      - uses: docker/setup-buildx-action@v1
+        with:
+          driver-opts: network=host
+
+      - id: prepare
+        name: Build binaries && Prepare
+        env:
+          GITHUB_REF: ${{ github.sha }}
+          GITHUB_SHA: ${{ github.ref }}
+          TARGET_PLATFORMS: linux/amd64,linux/arm64
+        run: |-
+          export TAG=${GITHUB_SHA::7}
+
+          if [[ ${{ github.ref }} == "refs/tags/v"* ]]; then
+            TAG=$(echo ${{ github.ref }} | sed -e "s/refs\/tags\///")
+          fi
+
+          echo ::set-output name=target_platforms::${TARGET_PLATFORMS}
+          echo ::set-output name=tag::${TAG}
+
+      - uses: docker/login-action@v1
+        name: Login docker.io
+        with:
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: docker.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+
+      - uses: docker/build-push-action@v2
+        name: Build image && May Push
+        with:
+          file: Dockerfile.docker-buildx
+          context: .
+          labels: |-
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+            org.opencontainers.image.revision=${{ github.sha }}
+          platforms: ${{ steps.prepare.outputs.target_platforms }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: |
+            docker.io/${{ github.repository }}:${{ steps.prepare.outputs.tag }}

Dockerfile.docker-buildx

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+# syntax = docker/dockerfile:experimental
+
+FROM --platform=${BUILDPLATFORM} golang:1.15.5 AS builder
+
+WORKDIR /go/src
+
+COPY ./ ./
+
+ARG GOPROXY
+RUN --mount=type=cache,id=gomod,target=/go/pkg/mod go mod download
+
+ARG TARGETARCH
+RUN --mount=type=cache,id=gomod,target=/go/pkg/mod CGO_ENABLED=0 GOARCH=${TARGETARCH} go build -o /go/bin/docker-buildx-${TARGETARCH} ./cmd/buildx;
+
+FROM docker
+
+RUN apk add --no-cache make
+
+ARG TARGETARCH
+COPY --from=builder /go/bin/docker-buildx-${TARGETARCH} /root/.docker/cli-plugins/docker-buildx
+
+ENV DOCKER_CLI_EXPERIMENTAL=enabled