Docker / containerd

Docker

List runtimes:

docker info --format "{{.Runtimes}}"

Get the path of a runtime:

 docker info --format "{{(index .Runtimes \"kata-runtime\").Path}}"

It follows the same Go json struct marshalling rules:

fields name are capitalized
use "{{json .}}" to figure out what to print
More info at: https://docs.docker.com/config/formatting/
If a field contains a ".", you need to use "index. E.g.: {{ index .OuterField "field.withdot" "InnerField" }}

Done in /etc/docker/daemon.json:

"exec-opts": ["native.cgroupdriver=systemd"]

$ sudo ctr i pull docker.io/library/busybox:latest
$ sudo ctr images ls

$ sudo ctr run -t docker.io/library/busybox:latest foobar
$ sudo ctr containers ls
$ sudo ctr tasks ls
$ sudo ctr tasks kill -s KILL foobar

Events (from moby)

$ sudo ctr namespaces ls
$ sudo ctr --namespace moby events