Bug 150481

Summary:	Stopping of filesystem service fails with certain devices
Product:	[Retired] Red Hat Cluster Suite	Reporter:	Derek Anderson <danderso>
Component:	rgmanager	Assignee:	Lon Hohberger <lhh>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4	CC:	cluster-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-05-06 20:45:36 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Derek Anderson 2005-03-07 15:41:56 UTC

Description of problem:
Thanks to Ion Alberdi <ialberdi> for pointing this out.

The umount command does not work with all device types, as it is being
deprecated, according to the umount man page.  So if you are using,
for example, CLVMD block devices and one of these is used in an fs
service, that service will fail to stop.

The reason the service fails to stop is umount won't work with this
type of device:

[root@link-11 cluster]# mount | grep VG3
/dev/VG3/LV3 on /mnt/gfs3 type ext3 (rw)
[root@link-11 cluster]# umount /dev/VG3/LV3
umount: /dev/VG3/LV3: not mounted
[root@link-11 cluster]# umount /mnt/gfs3
[root@link-11 cluster]#

By changing line 821 of /usr/share/cluster/fs.sh from:
umount $dev
to
umount $mp

The service will now stop properly.  Haven't scoured the script yet,
so there may well be other places that need to be changed.




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Comment 1 Lon Hohberger 2005-03-07 16:05:36 UTC

Ah, an artifact of 5-year-old mount/umount code ;)

Comment 2 Lon Hohberger 2005-03-07 16:06:21 UTC

Er, why will 'mount' work but not 'umount' ?

Comment 3 Lon Hohberger 2005-03-07 17:22:43 UTC

Fixed in CVS

Comment 4 Lon Hohberger 2005-03-07 17:44:06 UTC

Needs to follow symlinks in status portion so that we can compare
multiple possible outputs of mount(1).

(Don't forget to watch for symlink loops.)

e.g.:

fstab has: 
   /dev/vg0/root

which is a symlink to:
   /dev/mapper/vg0-root

The latter is what mount(1) reports.

Comment 5 Lon Hohberger 2005-03-07 17:57:57 UTC

Derek noted that we should run down symlinks in the output of mount too.

Comment 6 Lon Hohberger 2005-03-07 19:53:16 UTC

Fixes in CVS.

a. Walks symlinks / does findfs / whatever for specifed device
b. Figures out if mount output is a symlink and traces it for each
"device" output from mount(1).

fs.sh should work with symlinks specified, UUID=<foo>, LABEL=<foo>,
and directly-specified devices (e.g. /dev/sda1) now, even if the
output of mount(1) doesn't directly match what was specified in
cluster.conf (as long as the final device matches...).

Comment 7 Lon Hohberger 2005-05-06 20:45:36 UTC

These have been fixed in CVS for some time; closing