Put our cache cleaner in ECR (#681)

* Add an ECR repo for the cache cleaner

* Add make tasks for the cache cleaner

* Default to 'latest' for non-existent release files

Makefile

@@ -17,6 +17,14 @@ docker-build-terraform:
 docker-build-gatling:
 	docker build ./docker/gatling --tag gatling_ci
 
+## Build the image for the cache cleaner
+docker-build-cache_cleaner:
+	docker build ./efs_cache_cleaner --tag cache_cleaner
+
+## Build the image for the cache cleaner
+docker-deploy-cache_cleaner: docker-build-cache_cleaner
+	./scripts/deploy_docker_to_aws.py --project=cache_cleaner --infra-bucket=$(INFRA_BUCKET)
+
 
 install-docker-build-deps:
 	pip3 install --upgrade boto3 docker docopt

scripts/deploy_docker_to_aws.py

@@ -40,7 +40,12 @@
 
     # Get the release ID (which is the image tag)
     release_file = os.path.join(ROOT, '.releases', project)
-    tag = open(release_file).read().strip()
+    release_file_exists = True
+    try:
+        tag = open(release_file).read().strip()
+    except FileNotFoundError:
+        release_file_exists = False
+        tag = 'latest'
     docker_image = '%s:%s' % (project, tag)
 
     # Look up the URI of our ECR repo -- this is needed for authentication
@@ -69,5 +74,6 @@
         docker_client.images.remove(image=renamed_image_tag)
 
     # Finally, upload the release ID string to S3.
-    print('*** Uploading release ID to S3')
-    bucket.upload_file(Filename=release_file, Key='releases/%s' % project)
+    if release_file_exists:
+        print('*** Uploading release ID to S3')
+        bucket.upload_file(Filename=release_file, Key='releases/%s' % project)

terraform/ecr.tf

@@ -60,3 +60,8 @@ module "ecr_repository_loris" {
   source = "./ecr"
   name   = "loris"
 }
+
+module "ecr_repository_cache_cleaner" {
+  source = "./ecr"
+  name   = "cache_cleaner"
+}