How to cleanly and entirely remove images and containers

[mviereck]

Hello,

I once had issues with rootless nerdctl where image access failed. (I forgot the error messages.)
To fix this I have tried to remove everything related to nerdctl and containerd in HOME.
Now everything is messed up.
Some error messages:

lauscher@debianlaptop:~$ nerdctl info
FATA[0000] mkdir /var/lib/containerd/io.containerd.grpc.v1.introspection: no such file or directory: unknown 
lauscher@debianlaptop:~$ nerdctl images
WARN[0000] failed to get the platform list of image "docker.io/library/alpine:latest"  error="rpc error: code = NotFound desc = blob sha256:69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f expected at /var/lib/containerd/io.containerd.content.v1.content/blobs/sha256/69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f: blob not found: not found"
WARN[0000] failed to get the platform list of image "docker.io/library/busybox:latest"  error="rpc error: code = NotFound desc = blob sha256:5acba83a746c7608ed544dc1533b87c737a0b0fb730301639a0179f9344b1678 expected at /var/lib/containerd/io.containerd.content.v1.content/blobs/sha256/5acba83a746c7608ed544dc1533b87c737a0b0fb730301639a0179f9344b1678: blob not found: not found"
WARN[0000] failed to get the platform list of image "docker.io/x11docker/fvwm:latest"  error="rpc error: code = NotFound desc = blob sha256:e7fd7d09c834f44381e7f89248f9b7165ebdeb58bc083f00f1453eaa7833408e expected at /var/lib/containerd/io.containerd.content.v1.content/blobs/sha256/e7fd7d09c834f44381e7f89248f9b7165ebdeb58bc083f00f1453eaa7833408e: blob not found: not found"
WARN[0000] failed to get the platform list of image "docker.io/x11docker/openbox:latest"  error="rpc error: code = NotFound desc = blob sha256:00e38445fed2bac93d998941cee2d5b929522402899f63a0b2273aac79062e49 expected at /var/lib/containerd/io.containerd.content.v1.content/blobs/sha256/00e38445fed2bac93d998941cee2d5b929522402899f63a0b2273aac79062e49: blob not found: not found"
REPOSITORY    TAG    IMAGE ID    CREATED    PLATFORM    SIZE    BLOB SIZE
lauscher@debianlaptop:~$ nerdctl pull x11docker/fvwm
docker.io/x11docker/fvwm:latest: resolving      |--------------------------------------| 
elapsed: 1.1 s                   total:   0.0 B (0.0 B/s)                                         
FATA[0001] mkdir /var/lib/containerd/io.containerd.content.v1.content/ingest/34bbe14ee3940a1b237da4dd4e277141ece0d5898c82ca832c2b815638fc918a: no such file or directory: unknown 

Currently installed is nerdctl 0.21 (full) on debian bullseye. Reinstalling did not help.

Instead of analyzing all messages I'd rather like to know how to clean this up.
I'd like to remove everything related to nerdctl and to begin with a fresh install.

rootful nerdctl still works fine; but in general I'd like to know for rootful mode too, how to remove everything if desired.

[AkihiroSuda]

https://github.com/containerd/nerdctl/blob/master/docs/faq.md#how-to-uninstall---cant-remove-localsharecontainerd

containerd-rootless-setuptool.sh uninstall
rootlesskit rm -rf ~/.local/share/containerd ~/.local/share/nerdctl ~/.config/containerd

[mviereck]

That did the trick, thank you very much!
Now a fresh install works again.