Amazon ECS allows you to run Docker containers your application without having to actually manage physical hardware (or virtual hardware, in the case of the Fargate launch type). However, since it’s a managed service, you have less visibility with traditional monitoring tools. As such, it becomes even more important to take advantage of the available monitoring tools in AWS. In this post, we’ll explain how to use CloudWatch to monitor ECS and what is important to watch.

In the last post, Samuell (from the og-aws Slack group) figured out his negative TTL problems in Cloudfront. During that session, we actually solved two different problems. This post is to finish off that conversation and address the other problem, which was how to use the default error page in Cloudfront.

I’m on the og-aws Slack group, one of the more active groups of AWS developers and cloud practitioners. A member of the channel, Samuell, asked a question about S3, Cloudfront, and new files, and I saw the perfect opportunity to help out, so I offered.