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List of Commands example for working with containerd using ctr

September 28, 2023 Leave a Comment 
Here is a list of command examples for working with containerd using ctr:

List all images:
$ ctr image ls

Pull an image:
$ ctr image pull docker.io/library/nginx:latest

Run a container:
$ ctr run docker.io/library/nginx:latest

Attach a shell to a running container:
$ ctr exec -it my-container sh

Stop a running container:
$ ctr stop my-container

Remove a container:
$ ctr rm my-container

Remove an image:
$ ctr image rm docker.io/library/nginx:latest

Here are some more advanced command examples:

Inspect an image:
$ ctr image inspect docker.io/library/nginx:latest

Create a snapshot of a container:
$ ctr snapshot create my-container my-snapshot

Restore a container from a snapshot:
$ ctr snapshot restore my-snapshot my-new-container

Export an image to a file:
$ ctr image export docker.io/library/nginx:latest my-image.tar

Import an image from a file:
$ ctr image import my-image.tar

Start a container with a specific network:
$ ctr run --network bridge docker.io/library/nginx:latest

Start a container with a specific volume mount:
$ ctr run --mount type=bind,source=/host/path,target=/container/path docker.io/library/nginx:latest

You can also use ctr to work with namespaces. For example, you can list all namespaces using the following command:

$ ctr namespace ls

And you can create a new namespace using the following command:

$ ctr namespace create my-namespace

Once you have created a namespace, you can start containers in that namespace using the -n flag. For example, the following command will start a container in the my-namespace namespace:

$ ctr run -n my-namespace docker.io/library/nginx:latest
Rajesh Kumar
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