Containers

AWS container services offer the broadest choice of services to run your containers and run on the best global infrastructure, with 77 Availability Zones across 24 regions. AWS also provides strong security isolation between your containers, ensures you are running the latest security updates, and gives you the ability to set granular access permissions for every container.

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Updating an ECS service automatically using the CLI via Lambda

I have a multi-container application that runs a service on ECS. The images are hosted on ECR, configuration files are pulled from a S3 bucket during container startup via script. The application sits behind a network loadbalancer with EIP. The loadbalancer is in a public subnet and reachable, the app itself is inside a private subnet. My ultimate goal is to automatically update the service when either a.) a new image is checked in or b.) a new configuration file is uploaded. I figured the best way to do this behind a network load balancer (which supports rolling update) is to use the AWS ECS CLi inside a lambda function that triggers upon update. If I did not misread the docs, the CLI should trigger a rolling update. To test the CLI, I tried: `aws ecs update-service --cluster mycluster --service myservice --force-new-deployment` However, this was not successful. A new task was created, but was stopped before deployment was finished with log message: > Essential container in task exited Parameters for the service are min. 100 % and max. 200 %. I also tried to set the lower bound of running tasks to 0 %. This resulted in the successful exit of the old task, but the new tasks failed to deploy with the same error. This makes me think that I probably configured something incorrectly. Questions: 1.) Is using a lambda function a smart choice here? Or is there a better way? 2.) How can I troubleshoot the failing rolling update? I appreciate any help! If you need more information, please let me know. Best regards, Sebastian
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