Build the glr variant alongside standard

.github/workflows/docker-publish.yml

@@ -5,26 +5,22 @@ on:
     branches: [ "main" ]
     paths-ignore:
       - README.md
-
   pull_request:
     branches: [ "main" ]
 
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: gsa-tts/trestle
 
-
 jobs:
   build:
-
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
       # This is used to complete the identity challenge
       # with sigstore/fulcio when running outside of PRs.
       id-token: write
-
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -94,3 +90,78 @@ jobs:
         # This step uses the identity token to provision an ephemeral certificate
         # against the sigstore community Fulcio instance.
         run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
+
+
+  build-glr:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
+        with:
+          cosign-release: 'v2.2.4'
+
+      # Set up BuildKit Docker container builder to be able to build
+      # multi-platform images and export cache
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata - glr variant
+        id: meta-glr
+        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          flavor: latest=false
+          tags: |
+            type=raw,value={{date 'YYYYMMDD'}}-glr,priority=840
+
+      - name: Get today's date
+        id: today
+        run: echo "date=`date +'%Y%m%d'`" >> $GITHUB_OUTPUT
+
+      - name: Build and push Docker image - glr variant
+        id: build-and-push-glr
+        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
+        with:
+          context: .
+          file: Dockerfile.glr
+          build-args: BASE_VERSION=${{ steps.today.outputs.date }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta-glr.outputs.tags }}
+          labels: ${{ steps.meta-glr.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/arm64,linux/amd64
+
+      - name: Sign the published Docker image - glr
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+          TAGS: ${{ steps.meta-glr.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push-glr.outputs.digest }}
+        # This step uses the identity token to provision an ephemeral certificate
+        # against the sigstore community Fulcio instance.
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

README.md

@@ -17,6 +17,10 @@ This repository contains the source code for the `ghcr.io/gsa-tts/trestle` Docke
 1. [Update non-OSCAL SSP sections](#update-non-oscal-ssp-files)
 1. [Render a human-readable SSPP (TODO: within a CI workflow)](#render-ssp)
 
+### Use in a GitLab Runner
+
+(beta) We're working on a `-glr` variant image for use within [gitlab-runner-cloudgov](https://github.com/gsa-tts/gitlab-runner-cloudgov)
+
 ### Pull down the trestle image and initialize a compliance trestle project
 
 Prerequisite: `$(pwd)/compliance` directory exists and is where you want to store all compliance artifacts