On 11/05/2020 20:35, Thomas HUMMEL wrote:
Hello,
Just to inform about what I think may be a bug in xcatdsklspost:
https://github.com/xcat2/xcat-core/issues/6704
Hello,
actually a co-worker did a fine tracing of what exactly happened (taken
aside the xcatinfo quoting issue) :
When xcatpostinit1.service is added a Before=remote-fs-pre.target
dependency (which seems legit in order to setup the network in its final
form before mounting remote file systems) a temporary systemd
dependecies deadlock happens :
As syncfiles uses ssh, even for root, a session has to be put in the
user sessions slice. But the root slice is ordered after
systemd-user-sessions.service (see
/usr/lib/systemd/system/user-.slice.d/10-defaults.conf) which itself is
ordered After remote-fs.target (so After remote-fs-pre.target)
Hence a pam_systemd timeout for a failure to create session.
However, ssh seems to have some bypass after the timeout, hence the
deadlock ultimately, after a timeout resolved.
So basically, this is not a bug, neither from xCAT nor systemd but maybe
the lack of some kind of exception for the root user (but I guess this
is by design).
Thanks
--
Thomas HUMMEL
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