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If you terminate a running container instance with a connected Amazon ECS container agent, then the agent automatically deregisters the instance from your cluster. However, if you terminate a stopped container instance with a disconnected agent, then the container instance isn't automatically removed from the cluster.

Resolution
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**Note:** If you receive errors when you run AWS Command Line Interface (AWS CLI) commands, then see [Troubleshoot AWS CLI errors](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-troubleshooting.html). Also, make sure that [you're using the most recent AWS CLI version](https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html).

When you deregister a stopped container instance, the instance no longer appears as a resource in your cluster. To deregister your container instance that's in the **STOPPED** state, use the [Amazon ECS console](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/deregister_container_instance.html) or [AWS CLI](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ecs/deregister-container-instance.html).

To troubleshoot a disconnected ECS agent, see [How do I troubleshoot a disconnected Amazon ECS agent?](https://repost.aws/knowledge-center/ecs-agent-disconnected-linux2-ami)

Related information
-------------------

[Amazon EC2 container instances for Amazon ECS](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/create-capacity.html)

[Installing the Amazon ECS container agent](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-agent-install.html)

[Launching an Amazon ECS Linux container instance](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/launch_container_instance.html)

[Amazon ECS container agent configuration](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-agent-config.html)

I terminated my container instance in Amazon Elastic Container Service (Amazon ECS), but my instance still appears as a resource in my Amazon ECS cluster.

Why is the Amazon ECS container instance that I terminated still registered with its cluster?

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How do I increase the available disk space on my Amazon ECS container instances if I launched my container instances as standalone Amazon EC2 instances?

Why is the Amazon ECS container instance that I terminated still registered with its cluster?

Short description

Resolution

Related information

Relevant content