Martin Fick wrote:
--- Daniel Hokka Zakrisson <[EMAIL PROTECTED]> wrote:
Martin Fick wrote:
I am using drbd with vservers and I am running
into a problem trying to make drbd devices go
secondary, they report a device busy problem.
...
I have several vservers and each one has its own
drbd device so that they can be migrated
independently from one host to another. The
problem is that when a vserver is stopped and
another vserver which was started after the first
vserver is still running, the drbd device for the
first device remains busy despite the fact that
it is not mounted in any namespace anymore. It's
as if vservers keep a reference to any
filesystems mounted before they were started even
if they are not visible within the vserver? Is
there anyway to fix this?
Yes, you can enable namespace cleanup. I'm not sure
which version of the
patch is in the current Debian package, it might
need an update, but if
you have a working version, you should be able to
touch
/etc/vservers/.defaults/namespace-cleanup and any
guests you start after
that will not copy all the mounts.
OK, this seems to work, the drbd devices are no longer
busy.
The strange part is that it alaso removes all but the
last mount from the current df and mount listings in
the host namespace. This has another nasty side
effect: when using the FileSystem ocf script with
heartbeat, it can no longer unmount any of the hidden
filesystems so I am back to the same point, unable to
failover gracefully.
I guess I could modify the FileSystem script to use
/proc/mounts instead of the mount command, but it
still seems wrong to not be able to see my filesystems
when I use df. Is there a better workaround / fix to
this namespace cleanup behavior?
That means the Debian package has the original version of the patch,
which is slightly broken in that regard. ;) As a quick fix, you can edit
/usr/lib*/util-vserver/vserver.functions:_namespaceCleanup and add -l -n
to the umount command.
--
Daniel Hokka Zakrisson
GPG id: 06723412
GPG fingerprint: A455 4DF3 990A 431F FECA 7947 6136 DDA2 0672 3412
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