[systemd-devel] remote-fs ordering, iSCSI and _netdev

Andrei Borzenkov arvidjaar at gmail.com
Sun Nov 9 11:07:13 PST 2014


В Sun, 09 Nov 2014 20:15:56 +0300
Ivan Shapovalov <intelfx100 at gmail.com> пишет:

> On Tuesday 28 October 2014 at 06:41:32, Andrei Borzenkov wrote:	
> > В Mon, 27 Oct 2014 14:10:47 -0700
> > Chris Leech <cleech at redhat.com> пишет:
> > 
> > > 
> > > At boot fstab-generator is picking up on the _netdev option in fstab,
> > > and the generated mount units are ordered against remote-fs properly.
> > > If I leave a filesystem mounted at shutdown, it will be unmounted before
> > > the iSCSI session is destroyed or the network is shut down and
> > > everything works as expected.
> > > 
> > > But there are two cases that are problematic, adding entries to fstab at
> > > runtime and manually mounting without adding to fstab (while still using
> > > the _netdev option, some hint is needed).  The first case actually ends
> > > up being the second, with the possible work-around of always remembering
> > > to run a daemon-reload after editing fstab to run fstab-generator again.
> > >
> > 
> > Even known network filesystems still have a problem. If network
> > filesystem is mounted on boot, it pulls in network-online.target which
> > (hopefully) serves as synchronization point on shutdown. If there is no
> > network filesystem to mount at boot, network-online.target is not
> > started. If you mount NFS manually later there is nothing to wait for
> > on shutdown so network could be teared down before filesystem is
> > unmounted.
> 
> Isn't this (unmount before teardown) achieved by After=network.target? That
> target is passive, so it is pulled in by a provider, and all should work
> even in case of manually mounted filesystems.
> 
> Am I wrong somewhere?
> 

Actually no. Now when I revisited the problem, it was misconfiguration
on openSUSE side and misunderstanding on mine :)

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