Consider automatic mounting of debugfs if not present

[igsilya]

It is painful to manage debugfs mounts in network namespaces, because the mount only exists for the duration of the ip netns exec, i.e. if you run ip netns exec <my-ns> mount -t debugfs debugfs /sys/kernel/debug, it will not be mounted while running ip netns exec <my-ns> retis collect right after. This can be worked around by executing the shell and both commands inside, but If retis could mount it for us, it would be much easier.

Can be an opt-in behavior.

[amorenoz]

Would it be easier if you could just filter on a namespace (and run retis in the default one)?

[igsilya]

The problem is that I'm running it from the application that already runs inside the namespace. So, I just don't want to add the mounting command to the application, if possible. It's not a deal breaker, but it would be nice to have this functionality.

[atenart]

Maybe we could do this under --allow-system-changes?

[igsilya]

Maybe we could do this under --allow-system-changes?

Sounds reasonable.