Add register task definition single action for cronjobs

src/register-task-definition.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+import json
+import os
+from utils import validate_envs, json_template
+from ecs import EcsClient
+
+# ----- Check variables -----
+print('Step 1: Checking environment variables \n')
+
+req_vars = [
+    'CLUSTER_NAME',
+    'APP_NAME',
+    'AWS_DEFAULT_REGION'
+]
+
+try:
+    validate_envs(req_vars)
+except:
+    exit(1)
+
+cluster_name = os.getenv('CLUSTER_NAME')
+app_name = os.getenv('APP_NAME')
+aws_default_region = os.getenv('AWS_DEFAULT_REGION')
+task_def_file_name = os.getenv('TPL_FILE_NAME', 'task-definition.tpl.json')
+
+# ----- Create task definition file -----
+print('Step 2: Replace variables inside of %s \n' % task_def_file_name)
+
+try:
+    task_definition = json_template(task_def_file_name)
+except:
+    exit(1)
+
+print('Task definition file: \n%s' % task_definition)
+task_def = json.loads(task_definition)
+
+# ----- Register task definition file -----
+print('Step 3: Registering task definition')
+task = EcsClient()
+
+try:
+    task.register_task_definition(task_def)
+    print('Task definition arn: %s \n' % task.taskDefArn)
+except Exception as err:
+    print('Register task definition issue: %s' % err)
+    exit(1)