Bug 983599

Yeela, please backport the fix to 3.2.2

reproduce using sf19

steps to reproduce - 
====================
1. create setup with 2 hosts and 2 storagedomain (different storage)
2. block one of the hosts from accessing one of the domains.
3. check that filter doesn't show the dead path (in vdsm.log look for "filter")

from logs - 
===========
[root@camel-vdsc mapper]# tail -f /var/log/vdsm/vdsm.log |grep filter
storageRefresh::DEBUG::2013-07-29 18:14:56,691::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/lvm pvs --config " devices { preferred_names = [\\"^/dev/mapper/\\"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 filter = [ \'a|/dev/mapper/1acanan-011370441|/dev/mapper/360060160128230008cdf67d390f7e211|/dev/mapper/360060160128230008edf67d390f7e211|/dev/mapper/3600601601282300090df67d390f7e211|/dev/mapper/3600601601282300092df67d390f7e211|/dev/mapper/3600601601282300094df67d390f7e211|\', \'r|.*|\' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings --units b --nosuffix --separator | -o uuid,name,size,vg_name,vg_uuid,pe_start,pe_count,pe_alloc_count,mda_count,dev_size' (cwd None)
storageRefresh::DEBUG::2013-07-29 18:15:12,604::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/lvm vgs --config " devices { preferred_names = [\\"^/dev/mapper/\\"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 filter = [ \'a|/dev/mapper/1acanan-011370441|/dev/mapper/360060160128230008cdf67d390f7e211|/dev/mapper/360060160128230008edf67d390f7e211|/dev/mapper/3600601601282300090df67d390f7e211|/dev/mapper/3600601601282300092df67d390f7e211|/dev/mapper/3600601601282300094df67d390f7e211|\', \'r|.*|\' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings --units b --nosuffix --separator | -o uuid,name,attr,size,free,extent_size,extent_count,free_count,tags,vg_mda_size,vg_mda_free' (cwd None)
storageRefresh::DEBUG::2013-07-29 18:15:12,797::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/lvm lvs --config " devices { preferred_names = [\\"^/dev/mapper/\\"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 filter = [ \'a|/dev/mapper/1acanan-011370441|/dev/mapper/360060160128230008cdf67d390f7e211|/dev/mapper/360060160128230008edf67d390f7e211|/dev/mapper/3600601601282300090df67d390f7e211|/dev/mapper/3600601601282300092df67d390f7e211|/dev/mapper/3600601601282300094df67d390f7e211|\', \'r|.*|\' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings --units b --nosuffix --separator | -o uuid,name,vg_name,attr,size,seg_start_pe,devices,tags' (cwd None)
Thread-19::DEBUG::2013-07-29 18:15:17,971::misc::83::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/lvm vgs --config " devices { preferred_names = [\\"^/dev/mapper/\\"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 filter = [ \'a|/dev/mapper/1acanan-011370441|/dev/mapper/360060160128230008cdf67d390f7e211|/dev/mapper/360060160128230008edf67d390f7e211|/dev/mapper/3600601601282300090df67d390f7e211|/dev/mapper/3600601601282300092df67d390f7e211|/dev/mapper/3600601601282300094df67d390f7e211|\', \'r|.*|\' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings --units b --nosuffix --separator | -o uuid,name,attr,size,free,extent_size,extent_count,free_count,tags,vg_mda_size,vg_mda_free d68f2c43-3c1b-43e1-8114-420867e05d5f' (cwd None)



luns status - 
=============
[root@camel-vdsc mapper]# multipath -ll
3600601601282300090df67d390f7e211 dm-11 DGC,VRAID
size=100G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 9:0:0:2 sde 8:64 failed faulty running
3600601601282300094df67d390f7e211 dm-4 DGC,VRAID
size=100G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 9:0:0:4 sdg 8:96 failed faulty running
360060160128230008edf67d390f7e211 dm-10 DGC,VRAID
size=100G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 9:0:0:1 sdd 8:48 failed faulty running
3600601601282300092df67d390f7e211 dm-13 DGC,VRAID
size=100G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 9:0:0:3 sdf 8:80 failed faulty running
360060160128230008cdf67d390f7e211 dm-12 DGC,VRAID
size=100G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 9:0:0:0 sdc 8:32 failed faulty running
1acanan-011370441 dm-2 IET,VIRTUAL-DISK
size=100G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 7:0:0:1 sdb 8:16 active ready  running

(In reply to Aharon Canan from comment #3)
> 
> reproduce using sf19
> 
> steps to reproduce - 
> ====================
> 1. create setup with 2 hosts and 2 storagedomain (different storage)
> 2. block one of the hosts from accessing one of the domains.
> 3. check that filter doesn't show the dead path (in vdsm.log look for
> "filter")

This bug is not about filtering out dead paths, only about changing the filter to always point to /dev/mapper paths (as the title states).

The log excerpt above shows that this is working well.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-1155.html