[QOLDEV-833] add the ability to reuse AMIs instead of creating new ev…

…ery time

build-CKAN.sh

@@ -45,7 +45,18 @@ run-deployment () {
 }
 
 create-amis () {
-  ANSIBLE_EXTRA_VARS="$ANSIBLE_EXTRA_VARS timestamp=`date -u +%Y-%m-%dT%H:%M:%SZ`"
+  # try to match an existing image instead of creating a new one
+  if [ "$IMAGE_VERSION" = "" ]; then
+    IMAGE_VERSION=`git rev-parse HEAD` || true
+  fi
+  if [ "$IMAGE_VERSION" != "" ]; then
+    echo "Checking for existing $ENVIRONMENT $INSTANCE_NAME images tagged with version ${IMAGE_VERSION}..."
+    IMAGE_IDS=$(aws ec2 describe-images --filters "Name=tag:Environment,Values=$ENVIRONMENT" "Name=tag:Service,Values=$INSTANCE_NAME" "Name=tag:Version,Values=$IMAGE_VERSION" --query "Images[].ImageId")
+    if [ "$IMAGE_IDS" != "" ]; then
+      return 0
+    fi
+  fi
+  ANSIBLE_EXTRA_VARS="$ANSIBLE_EXTRA_VARS timestamp=`date -u +%Y-%m-%dT%H:%M:%SZ` image_version=$IMAGE_VERSION"
   run-playbook "AMI-templates.yml"
   run-playbook "create-AMI" "layer=Batch" & BATCH_PID=$!
   run-playbook "create-AMI" "layer=Web" & WEB_PID=$!

create-AMI.yml

@@ -95,9 +95,10 @@
           Name: "{{ InstanceName }}-{{ timestamp | replace(':', '-') }}"
           Environment: "{{ Environment }}"
           Service: "{{ service_name }}"
+          Layer: "{{ layer | lower }}"
           Division: "{{ Division }}"
           Owner: "{{ Owner }}"
-          Version: "1.0"
+          Version: "{{ image_version | default('1.0') }}"
       register: new_image
 
     - name: Record AMI ID