can we safely relocate /var/lib/containerd to /var/lib/docker ?

[devZer0]

hello, we have a bunch of docker hosts and usually put /var/lib/docker to it's own partition, so root won't fill up.

now, with recent docker installations, /var/lib/containerd is getting used per default, thus rendering our current partitioning scheme useless.

is it safe to relocate /var/lib/containerd to /var/lib/docker/containerd ?

i'm not really sure, as /var/lib/docker is "docker data dir" and i'm not sure what will happen if you put other dirs into that.

[vvoland]

/var/lib/docker/containerd is used by the built-in dockerd managed containerd spawned when you don't have system-wide containerd install.

I would recommend against moving anything under /var/lib/docker - it's exclusively to be accessed by one dockerd instance.

However, it should be fine if you pick a location that doesn't conflict with any docker managed dir. For example /var/lib/docker/.my-containerd.

See docs on how to configure containerd storage dir:
https://docs.docker.com/engine/daemon/#configure-the-data-directory-location