Juju command "ssh" not supported on kubernetes models

[Nick Moffitt]

Following the microk8s juju tutorial I then tried out of curiosity to run:

 `juju ssh mariadb-k8s/0`

And I got back:

 `ERROR Juju command "ssh" not supported on kubernetes models`

This seems odd, because I can achieve the same effect with:

 `microk8s.kubectl exec -ti -n test-model mariadb-k8s-0 -- /bin/bash`

And substituting other commands in lets me achieve a seemingly equivalent result from what I'd expect out of a `juju ssh`.

Could we please have `juju ssh` remapped for k8s units?

[Ian Booth (wallyworld)]

This is a feature that is on the todo list. It's not yet bubbled to the top of the priority list because there is an easy workaround using kubectl exec.

[John A Meinel (jameinel)]

On a related note: https://bugs.launchpad.net/juju/+bug/1876105

ssh is used in IAAS models to support 'juju debug-hooks/debug-code' but those aren't available on K8s models.
Even if we don't have general shell access, having debug-hooks would be a big help for charmers.

[Ian Booth (wallyworld)]

debug-hook support is on the roadmap this cycle.
"juju ssh" support may hopefully fall out as well, but we had to drop explicit committment to it

[Canonical Juju QA Bot (juju-qa-bot)]

This bug has not been updated in 2 years, so we're marking it Low importance. If you believe this is incorrect, please update the importance.