CD added

.github/workflows/packer-ami-build.yml

@@ -4,6 +4,14 @@ on:
   push:
     branches:
       - main
+env:
+  PROJECT_ID: ${{ secrets.GCP_PROJECT_ID }}
+  GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
+  GCP_REGION: 'us-east1'  # Make sure this is the correct region
+  MIG_NAME: 'webapp-manager'  # The name of your managed instance group
+  SERVICE_ACCOUNT_EMAIL: ${{ secrets.GCP_SERVICE_ACCOUNT_EMAIL }}
+  NETWORK: 'assignment-9' # Replace with your actual network name
+  SUBNETWORK: 'webapp' # Replace with your actual subnetwork name
 
 jobs:
   ami-creation:
@@ -91,3 +99,52 @@ jobs:
         packer init .
         ls -lah /tmp    
         packer build  -var 'project_id=${{ secrets.GCP_PROJECT_ID }}' webapp-packer.pkr.hcl
+
+ #  CD 
+
+    - name: Get the latest image name
+      id: get-latest-image
+      run: |
+        IMAGE_NAME=$(gcloud compute images list --filter="name:webapp-image*" --format="get(name)" --sort-by="~creationTimestamp" --limit=1)
+        echo "Latest image name is $IMAGE_NAME"
+        echo "::set-output name=image_name::$IMAGE_NAME"
+
+  # Create a new instance template with the new image and startup script
+    - name: Create a new instance template with startup script
+      run: |
+        gcloud compute instance-templates create "${{ env.MIG_NAME }}-template-${{ steps.get-latest-image.outputs.image_name  }}" \
+          --machine-type=e2-medium \
+          --image="${{ steps.get-latest-image.outputs.image_name }}" \
+          --image-project=${{ env.PROJECT_ID }} \
+          --region=${{ env.GCP_REGION }} \
+          --network="projects/${{ env.PROJECT_ID }}/global/networks/${{ env.NETWORK }}" \
+          --subnet="projects/${{ env.PROJECT_ID }}/regions/${{ env.GCP_REGION }}/subnetworks/${{ env.SUBNETWORK }}" \
+          --metadata=startup-script="${{ secrets.GCP_STARTUP_SCRIPT }}" \
+          --service-account='${{ secrets.GCP_SERVICE_ACCOUNT_EMAIL }}' \
+          --scopes='https://www.googleapis.com/auth/cloud-platform'
+          
+
+
+
+    # Update managed instance group with the new template
+    - name: Update managed instance group
+      run: |
+        gcloud compute instance-groups managed set-instance-template ${{ env.MIG_NAME }} \
+          --template="${{ env.MIG_NAME }}-template-${{ steps.get-latest-image.outputs.image_name }}" \
+          --region=${{ env.GCP_REGION }}
+
+    #Start a basic rolling update
+    - name: Start a basic rolling update
+      run: |
+        gcloud compute instance-groups managed rolling-action start-update ${{ env.MIG_NAME }} \
+          --version template="${{ env.MIG_NAME }}-template-${{ steps.get-latest-image.outputs.image_name }}" \
+          --region=${{ env.GCP_REGION }} \
+          --max-surge=3 \
+          --max-unavailable=0
+
+   
+
+
+
+
+