[linux-lvm] lvdisplay ignoring filter in /etc/lvm.conf?

[linux-lvm] lvdisplay ignoring filter in /etc/lvm.conf?

[Don Hoover]

I am seeing some odd behavior on Redhat 5.5 LVM.

I just noticed that lvdisplay seems to ignore the filter configuration in /etc/lvm.conf.

We are getting "Found duplicate PV" errors on the /dev/sd? devices on our systems that are using clvm even though we filter those out in the lvm.conf to use the /dev/mapper/mpath* devices.  

We are running in a cluster, does clvm cause lvdisplay ignore this filter?  Is there a way to stop these "duplicate pv" errors from lvdisplay that is different on RHEL 55 than what worked before(filter line)?


It seems that its just lvdisplay in redhat 5.5 that is ignoring them.

For "lvscan -vvvvvvvvvvvvvvvvv"

I see this in the debug output:
#filters/filter-regex.c:172         /dev/sdgy: Skipping (regex)


For "lvdisplay -vvvvvvvvvvvvvvvvv"

I see this in the debug output:
#cache/lvmcache.c:1224       Ignoring duplicate PV Gw7zqCRUj0mjfGltw3AaHhMfznSjmMTc on /dev/sdgy - using dm /dev/mapper/mpath91

And no filter/skipping lines at all for any /dev/sd* devices...it scans them anyway for some reason.


I wonder if this is a bug that has been introdced in the latest lvm packages...I am seeing this on a RHEL55 box running:
lvm2-2.02.56-8.el5.x86_64
lvm2-cluster-2.02.56-7.el5.x86_64

Re: [linux-lvm] lvdisplay ignoring filter in /etc/lvm.conf?

[Don Hoover]

On futher-further testing..it appears that a "vgscan -vvvvvvvvvvvvvv" does not update the lvm cache like it used too before RHEL 5.5.

vgdisplay apparently uses the device list in the /etc/lvm/cache/.cache file.

If you make a change to your filter line in the lvm.conf, it won't take affect until you manually "rm /etc/lvm/cache/.cache", then run vgscan, and then the "Found duplicate PV" messages will be gone.

Re: [linux-lvm] lvdisplay ignoring filter in /etc/lvm.conf?

[Milan Broz]

On 05/12/2010 05:56 PM, Don Hoover wrote:
> On futher-further testing..it appears that a "vgscan -vvvvvvvvvvvvvv"
> does not update the lvm cache like it used too before RHEL 5.5.

btw -vvvv is enough ;-)

anyway, seems there is some bug, please can you report it to bugzilla.redhat.com (or through support channel)?
I'll try to investigate it there.

Thanks,
Milan

Re: [linux-lvm] lvdisplay ignoring filter in /etc/lvm.conf?

[Milan Broz]

On 05/12/2010 09:22 PM, Milan Broz wrote:
> On 05/12/2010 05:56 PM, Don Hoover wrote:
>> On futher-further testing..it appears that a "vgscan -vvvvvvvvvvvvvv"
>> does not update the lvm cache like it used too before RHEL 5.5.

It is only cluster lvm problem,
I filled that problem here https://bugzilla.redhat.com/show_bug.cgi?id=591861
Add to cc if interested.

Workaround for now is to manually remove that .cache file after filter change.

Thanks for reporting this,
Milan