[Linux-cluster] LVM Cluster errors on bootup -- ok?
Ray Van Dolson
rvandolson at esri.com
Wed Nov 25 17:34:31 UTC 2009
On Wed, Nov 25, 2009 at 09:30:17AM -0800, Ray Van Dolson wrote:
> Noticed that on bootup of a cluster node usings cLVM and GFS2 I see the
> following:
>
> Scanning logical volumes
> connect() failed on local socket: Connection refused
> WARNING: Falling back to local file-based locking.
> Volume Groups with the clustered attribute will be inaccessible.
> Reading all physical volumes. This may take a while...
> Found volume group "VolGroup00" using metadata type lvm2
> Activating logical volumes
> connect() failed on local socket: Connection refused
> WARNING: Falling back to local file-based locking.
> Volume Groups with the clustered attribute will be inaccessible.
> 2 logical volume(s) in volume group "VolGroup00" now active
>
> VolGroup00 is a vg on the local disk and is not shared.
>
> Later, cluster services start (including clvmd) and the clustered
> volumes and associated filesystems come up fine.
>
> I'm assuming the errors above are because clvmd isn't running. Can
> they be safely ignored? Any way to configure so my clustered volumes
> aren't scanned until after clvmd starts? I know I can edit filter
> settings in lvm.conf, but don't see any way to specify that some block
> devices should be skipped until clvmd is running.
>
Hmm, thinking out loud here. I am using multipath, and I'm seriously
doubting multipath is running when the errors above are spit out. My
filter is as follows for lvm.conf:
filter = [ "a|/dev/mapper/.*|", "a|/dev/hd[a-z].*|", "r|/dev/sd[a-z].*|" ]
Which should be filtering out my FC attached devices in lieu of stuff
under /dev/mapper.
So I guess maybe the fact that I have locking_type 3 set, my local hard
drive (non-clustered) is getting scanned and clustered locking is
attempted with it which fails.
So in the end it's probably OK that it falls back to local file locking
and I should just ignore these "errors".
Ray
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