fix mount crio sock

[anngdinh]

Node agent need mount crio sock

[def]

It's not necessary to mount this because the agent can access the host filesystem

[anngdinh]

I got this error if not mount

[def]

Please show the beginning of the log

[anngdinh]

[def]

As you can see in the log, the agent tried to access the cri-o socket through: /proc/1/root/var/run/crio/crio.sock but encountered the no such file or directory error. This issue may arise if /var/run/crio/crio.sock or /var/run/crio is a symlink. Could you please check this?

[anngdinh]

No. It's not a symlink, it's a sock file. But i don't understand why node agent can read the file if I don't mount it.

[def]

The agent runs in the host PID namespace and has access to the proc filesystem. It can reach the host mount namespace through /proc/1/root/...

[anngdinh]

I see /proc/1/root -> /. I don't really catch it.

[def]

To understand this, please read the section explaining /proc/pid/root in this documentation