Comment 5 for bug 1823882

Soooo. I've taken some more time into this issue.

There are a couple of things:

- the script itself is wrong, there's a typo in it (missing "$" in the "for" loop)
- apparently something is preventing lsof to know about the unix sockets used by the ovn-northd service

While the first issue is easy to correct, the second one is a bit trickier.

We can see the following lsof output:
()[root@undercloud /]# lsof -c ovn-northd -Ua
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ovn-north 8 root 4u unix 0xffff9ac671751c00 0t0 753132 socket
ovn-north 8 root 8u unix 0xffff9ac671752000 0t0 753134 /var/run/openvswitch/ovn-northd.8.ctl
ovn-north 8 root 9u unix 0xffff9ac671750400 0t0 753135 socket
ovn-north 8 root 10u unix 0xffff9ac671756000 0t0 753136 socket

This shows some "socket", but without pointing to the actual files.

I tried to go directly for the /proc/, and here's the thing:
()[root@undercloud /]# ls /proc/8/fd -l
total 0
lrwx------. 1 root root 64 Apr 16 09:18 0 -> /dev/null
l-wx------. 1 root root 64 Apr 16 09:18 1 -> pipe:[759993]
lrwx------. 1 root root 64 Apr 16 09:18 10 -> socket:[753136]
l-wx------. 1 root root 64 Apr 16 09:18 2 -> pipe:[759994]
l-wx------. 1 root root 64 Apr 16 09:18 3 -> /var/log/openvswitch/ovn-northd.log
lrwx------. 1 root root 64 Apr 16 09:18 4 -> socket:[753132]
lrwx------. 1 root root 64 Apr 16 09:18 5 -> /run/openvswitch/ovn-northd.pid
lr-x------. 1 root root 64 Apr 16 09:18 6 -> pipe:[753133]
l-wx------. 1 root root 64 Apr 16 09:18 7 -> pipe:[753133]
lrwx------. 1 root root 64 Apr 16 09:18 8 -> socket:[753134]
lrwx------. 1 root root 64 Apr 16 09:18 9 -> socket:[753135]

All the pipe and socket are in red, usually meaning "broken symlink", although for this kind of things I'm not sure it's the same meaning.

Is there a way to ensure that ovn-northd thingy is actually working as expected? The running command is pointing the sockets, but lsof doesn't show that:
/usr/bin/ovn-northd -vconsole:emer -vsyslog:err -vfile:info --ovnnb-db=unix:/run/openvswitch/ovnnb_db.sock --ovnsb-db=unix:/run/openvswitch/ovnsb_db.sock [...]

Cheers,

C.