feat: implement oras pull, sops decrypt, ssh transfer and deploy

.woodpecker/deploy.yaml

@@ -10,14 +10,73 @@ steps:
 
   - name: show-deployment-request
     image: alpine:3.20
+    environment:
+      ZOT_USERNAME:
+        from_secret: zot_username
+      ZOT_PASSWORD:
+        from_secret: zot_password
+      SOPS_AGE_KEY:
+        from_secret: sops_age_key
+      DEPLOY_SSH_KEY:
+        from_secret: deploy_ssh_key
     commands:
       - 'echo "  ARTIFACT=$ARTIFACT"'
       - 'echo "  TARGET=$TARGET"'
       - test -n "$ARTIFACT" || (echo "ERROR - ARTIFACT param missing" && exit 1)
       - test -n "$TARGET" || (echo "ERROR - TARGET param missing" && exit 1)
       - test -f "hosts/$TARGET" || (echo "ERROR - unknown host alias $TARGET" && exit 1)
-      - 'echo "Resolved host alias $TARGET:"'
+      - . "hosts/$TARGET"
-      - cat "hosts/$TARGET"
+      - 'echo "Resolved host alias $TARGET -> $SSH_USER@$SSH_HOST"'
+      # Tooling: oras (artifact retrieval) and sops (secret decryption).
+      - apk add --no-cache curl openssh-client
+      - curl -sL "https://github.com/oras-project/oras/releases/download/v1.3.4/oras_1.3.4_linux_amd64.tar.gz" -o /tmp/oras.tar.gz
+      - mkdir -p /tmp/oras-install && tar -xzf /tmp/oras.tar.gz -C /tmp/oras-install
+      - install /tmp/oras-install/oras /usr/local/bin/oras
+      - curl -sL "https://github.com/getsops/sops/releases/download/v3.13.3/sops-v3.13.3.linux.amd64" -o /usr/local/bin/sops
+      - chmod +x /usr/local/bin/sops
+      # Retrieve the exact deployment artifact by digest/tag reference.
+      - mkdir -p /tmp/deploy-bundle && cd /tmp/deploy-bundle
+      - oras login "registry.ci.poc.mehl.mx" -u "$ZOT_USERNAME" -p "$ZOT_PASSWORD"
+      - oras pull "$ARTIFACT"
+      - test -f compose.yaml || (echo "ERROR - compose.yaml missing from artifact" && exit 1)
+      - test -f secrets.prod.env || (echo "ERROR - secrets.prod.env missing from artifact" && exit 1)
+      - test -f release.env || (echo "ERROR - release.env missing from artifact" && exit 1)
+      # Decrypt the service's secrets transiently, using the deployment age key.
+      - sops --decrypt secrets.prod.env > /tmp/deploy-bundle/secrets.decrypted.env
+      - chmod 600 /tmp/deploy-bundle/secrets.decrypted.env
+      # Set up the SSH key used to reach the target host.
+      - mkdir -p -m 700 /tmp/ssh
+      - echo "$DEPLOY_SSH_KEY" > /tmp/ssh/id_deploy
+      - chmod 600 /tmp/ssh/id_deploy
+      # Ensure the remote working directory exists, then transfer
+      # compose.yaml, release.env and the decrypted secrets to the target host.
+      - >-
+        ssh -i /tmp/ssh/id_deploy -o StrictHostKeyChecking=accept-new
+        "$SSH_USER@$SSH_HOST"
+        "mkdir -p /tmp/poc-deploy"
+      - >-
+        scp -i /tmp/ssh/id_deploy -o StrictHostKeyChecking=accept-new
+        compose.yaml release.env secrets.decrypted.env
+        "$SSH_USER@$SSH_HOST:/tmp/poc-deploy/"
+      # Run the deployment on the target host, then remove the plaintext secrets.
+      - >-
+        ssh -i /tmp/ssh/id_deploy -o StrictHostKeyChecking=accept-new
+        "$SSH_USER@$SSH_HOST" '
+        set -a; . /tmp/poc-deploy/release.env; set +a;
+        docker compose --project-directory /tmp/poc-deploy
+        -f /tmp/poc-deploy/compose.yaml
+        --env-file /tmp/poc-deploy/secrets.decrypted.env
+        pull &&
+        docker compose --project-directory /tmp/poc-deploy
+        -f /tmp/poc-deploy/compose.yaml
+        --env-file /tmp/poc-deploy/secrets.decrypted.env
+        up -d --remove-orphans
+        '
+      - >-
+        ssh -i /tmp/ssh/id_deploy -o StrictHostKeyChecking=accept-new
+        "$SSH_USER@$SSH_HOST"
+        "rm -f /tmp/poc-deploy/secrets.decrypted.env"
+      - echo "Deployment finished."
     when:
       event: [deployment, manual]