#DOCKER RUN IMAGE FROM COMMAND LINE HOW TO#

Instead of building images with ctr, you can import existing images built with docker build or other OCI-compatible software: $ docker build -t my-app.

However, containerd itself is often used to build images by higher-level tools.Д¬heck out my investigation post on what actually happens when you build an image to learn more about image building internals. Surprisingly, containerd doesn't provide out-of-the-box image building support. To list local images, one can use: $ ctr images ls $ ctr images pull quay.io/quay/redis:latest $ ctr images pull docker.io/kennethreitz/httpbin:latest When pulling images, the fully-qualified reference seems to be required, so you cannot omit the registry or the tag part: $ ctr images pull docker.io/library/nginx:1.21 However, since it's the closest thing to the actual containerd API, it can serve as a great exploration means - by examining the available commands, you can get a rough idea of what containerd can and cannot do.Д¬tr is also well-suitable for learning the capabilities of low-level container runtimes since ctr + containerd is much closer to actual containers than docker + dockerd. Apparently, its primary audience is containerd developers testing the daemon. The ctr interface is incompatible with Docker CLI and, at first sight, may look not so user-friendly. If you have containerd running on a machine, chances are the ctr binary is also there.

#DOCKER RUN IMAGE FROM COMMAND LINE HOW TO#

Go check it out! How to use containerd with ctrД¬tr is a command-line client shipped as part of the containerd project.

Use cases include Kubernetes monitoring, auto-remediations, application troubleshooting, and multi-cluster change tracking. Is an open source platform for multi-cluster Kubernetes troubleshooting and automation.

Docker run image from command line