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Re: [linux-lvm] LVM snapshot with Clustered VG



Am 06.03.13 08:58, schrieb Vladislav Bogdanov:
06.03.2013 10:40, Andreas Pflug wrote:
Am 01.03.13 16:41, schrieb Vladislav Bogdanovr?

Hi Andreas,
Lock convertion is only enabled if you pass --force flag.
Also, to upgrade local lock to exclusive one, you need to ensure IIRC
that no more node holds local lock.
Hm, tried that as well:

tools/lvm lvchange --force -aey  -vvvv vg/locktest

--force changes the error from "resource busy" to "invalid argument":
Is volume active on other nodes at that time?

I made sure it's not active on other nodes: lvchange -an vg/locktest ; lvchange -aly vg/locktest
And do you run clvmd from that build tree as well?

Also, can you please try attached patch (on top of that one you have)? I
polished conversion a bit more, denying -an if volume is ex-locked
somewhere and other fixes to logic.
I tried that additional patch. I'm running this test versions on my test node only (including clvmd), the other nodes are still running clvmd 2.2.95 (I guess this shouldn't matter since all are inactive). Same result:

#lvchange.c:258 Activating logical volume "locktest" exclusively (forced) #activate/dev_manager.c:284 Getting device info for vg-locktest [LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN] #ioctl/libdm-iface.c:1724 dm info LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN NF [16384] (*1)
#activate/activate.c:1067       vg/locktest is active
#activate/dev_manager.c:284 Getting device info for vg-locktest [LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN] #ioctl/libdm-iface.c:1724 dm info LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN NF [16384] (*1)
#activate/activate.c:1067       vg/locktest is active
#activate/dev_manager.c:284 Getting device info for vg-locktest [LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN] #ioctl/libdm-iface.c:1724 dm info LVM-oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN NF [16384] (*1)
#activate/activate.c:1067       vg/locktest is active
#locking/cluster_locking.c:513 Locking LV oW2W7O2cgWRLUhoVR8qqqQY7wlcYexmWU8y83bGQz9IcnXh3GfXslBN6ziZrC3BN EX (LV|NONBLOCK|CLUSTER|LOCAL|CONVERT) (0x40dd) #locking/cluster_locking.c:400 Error locking on node 7400a8c0: Invalid argument


This patch also allows locking (activation) to be performed on remote
nodes. I only tested this with corosync2 (which is set up in a way
latest pacemaker - post-1.1.8 git master - needs, nodes has additional
'name' value in nodelist, please see
http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/s-node-name.html).

I'm running corosync 1.4.2 (debian wheezy).

Regards,
Andreas


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