Merge pull request #32 from smallstep/cloud-only

Add job to build docker images without CGO

.github/workflows/release.yml

@@ -17,10 +17,12 @@ jobs:
     runs-on: ubuntu-latest
     env:
       DOCKER_IMAGE: smallstep/step-kms-plugin
+      DOCKER_IMAGE_CLOUD: smallstep/step-kms-plugin-cloud
     outputs:
       version: ${{ steps.extract-tag.outputs.VERSION }}
       is_prerelease: ${{ steps.is_prerelease.outputs.IS_PRERELEASE }}
       docker_tags: ${{ env.DOCKER_TAGS }}
+      docker_tags_cloud: ${{ env.DOCKER_TAGS_CLOUD }}
     steps:
       - name: Is Pre-release
         id: is_prerelease
@@ -36,10 +38,12 @@ jobs:
           VERSION=${GITHUB_REF#refs/tags/v}
           echo "VERSION=${VERSION}" >> ${GITHUB_OUTPUT}
           echo "DOCKER_TAGS=${{ env.DOCKER_IMAGE }}:${VERSION}" >> ${GITHUB_ENV}
+          echo "DOCKER_TAGS_CLOUD=${{ env.DOCKER_IMAGE_CLOUD }}:${VERSION}" >> ${GITHUB_ENV}
       - name: Add Latest Tag
         if: steps.is_prerelease.outputs.IS_PRERELEASE == 'false'
         run: |
           echo "DOCKER_TAGS=${{ env.DOCKER_TAGS }},${{ env.DOCKER_IMAGE }}:latest" >> ${GITHUB_ENV}
+          echo "DOCKER_TAGS_CLOUD=${{ env.DOCKER_TAGS_CLOUD }},${{ env.DOCKER_IMAGE_CLOUD }}:latest" >> ${GITHUB_ENV}
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1
@@ -79,3 +83,17 @@ jobs:
       docker_image: smallstep/step-kms-plugin
       docker_file: docker/Dockerfile
     secrets: inherit
+
+  build_upload_docker_cloud:
+    name: Build & Upload Cloud Only Docker Images
+    needs: create_release
+    permissions:
+      id-token: write
+      contents: write
+    uses: smallstep/workflows/.github/workflows/docker-buildx-push.yml@main
+    with:
+      platforms: linux/amd64,linux/arm64
+      tags: ${{ needs.create_release.outputs.docker_tags_cloud }}
+      docker_image: smallstep/step-kms-plugin-cloud
+      docker_file: docker/Dockerfile.cloud
+    secrets: inherit

docker/Dockerfile.cloud

@@ -0,0 +1,15 @@
+FROM golang:alpine AS builder
+
+WORKDIR /src
+COPY . .
+
+RUN apk add --no-cache git make
+RUN make V=1 CGO_ENABLED=0 build
+
+FROM smallstep/step-cli:latest
+
+COPY --from=builder /src/bin/step-kms-plugin /usr/local/bin/step-kms-plugin
+
+USER step
+
+CMD ["/bin/bash"]