Add GitHub Actions workflow for deploying downstream clusters

Author: TineoC

.github/workflows/deploy-downstream.yml

@@ -0,0 +1,87 @@
+name: "Deploy: Downstream Clusters"
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Image tag to deploy (e.g. 1.1.0)'
+        required: true
+        default: 'latest'
+
+jobs:
+  update-sandbox:
+    name: Update Sandbox Cluster
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.get_tag.outputs.TAG }}
+    steps:
+      - name: Checkout App
+        uses: actions/checkout@v4
+
+      - name: Get Release Tag
+        id: get_tag
+        run: |
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            echo "TAG=${{ inputs.tag }}" >> $GITHUB_OUTPUT
+          else
+            echo "TAG=${GITHUB_REF:11}" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Checkout Sandbox Cluster
+        uses: actions/checkout@v4
+        with:
+          repository: CodeForPhilly/cfp-sandbox-cluster
+          token: ${{ secrets.BOT_GITHUB_TOKEN }}
+          path: sandbox
+
+      - name: Update Sandbox Image Tag
+        working-directory: sandbox/balancer
+        run: |
+          curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+          ./kustomize edit set image ghcr.io/codeforphilly/balancer-main/app:${{ steps.get_tag.outputs.TAG }}
+          rm kustomize
+
+      - name: Create Sandbox PR
+        uses: peter-evans/create-pull-request@v6
+        with:
+          token: ${{ secrets.BOT_GITHUB_TOKEN }}
+          path: sandbox
+          commit-message: "Deploy balancer ${{ steps.get_tag.outputs.TAG }} to sandbox"
+          title: "Deploy balancer ${{ steps.get_tag.outputs.TAG }}"
+          body: "Updates balancer image tag to ${{ steps.get_tag.outputs.TAG }}"
+          branch: "deploy/balancer-${{ steps.get_tag.outputs.TAG }}"
+          base: main
+          delete-branch: true
+
+  update-live:
+    name: Update Live Cluster
+    needs: update-sandbox
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Live Cluster
+        uses: actions/checkout@v4
+        with:
+          repository: CodeForPhilly/cfp-live-cluster
+          token: ${{ secrets.BOT_GITHUB_TOKEN }}
+          path: live
+
+      - name: Update Live Image Tag
+        working-directory: live/balancer
+        run: |
+          curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+          ./kustomize edit set image ghcr.io/codeforphilly/balancer-main/app:${{ needs.update-sandbox.outputs.tag }}
+          rm kustomize
+
+      - name: Create Live PR
+        uses: peter-evans/create-pull-request@v6
+        with:
+          token: ${{ secrets.BOT_GITHUB_TOKEN }}
+          path: live
+          commit-message: "Deploy balancer ${{ needs.update-sandbox.outputs.tag }} to live"
+          title: "Deploy balancer ${{ needs.update-sandbox.outputs.tag }}"
+          body: "Updates balancer image tag to ${{ needs.update-sandbox.outputs.tag }}"
+          branch: "deploy/balancer-${{ needs.update-sandbox.outputs.tag }}"
+          base: main
+          delete-branch: true