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I'm using github, jenkins, aws ECR, aws ECS.
I want to deploy automatically when github have new commit. When github have new commit, github sends a event webhook to jenkins, jenkins builds the images and pushes to ECR with tag 'latest'.
I wonder how can I make my ECS service restart task and redeploy images automatically when the ECR image is changed?
I don't think you can trigger re-deployment based on ECS image being updated. You can however do it as part of your Jenkins pipeline - after you push to ECR as a next step in the pipeline can run a script that will reload the task.
In fact in my pipelines I deploy the ECS Tasks through CloudFormation templates and the CloudFormation stack update is part of the pipeline. That way I update the ECS Task definition automatically every time I push a new image to non-prod ECR.
Hope that helps :)
There's a good article about enabling auto-deployment everytime an image is pushed to ECR here: https://medium.com/@YadavPrakshi/automate-zero-downtime-deployment-with-amazon-ecs-and-lambda-c4e49953273d
Check the following part out:
EC2 Container does not write logs directly to CloudWatch but CloudTrail records API activity for ECS. The flow of automation will be like this: Whenever a Upload occurs to ECR, CloudTrail records PutImage event and can write it to CloudWatch Logs. An Alarm can be triggered whenever a PutImage event is written in CloudWatch Logs which can further trigger a Lambda Function through SNS. Lambda Function Contains the code to Create Task Definition Revision and Update Service with latest Task Definition.
