[Pacemaker] DRBD+LVM+NFS problems
Vladislav Bogdanov
bubble at hoster-ok.com
Tue Mar 26 05:14:34 UTC 2013
26.03.2013 04:23, Dennis Jacobfeuerborn wrote:
> I have now reduced the configuration further and removed LVM from the
> picture. Still the cluster fails when I set the master node to standby.
> What's interesting is that things get fixed when I issue a simple
> "cleanup" for the filesystem resource.
>
> This is what my current config looks like:
>
> node nfs1 \
> attributes standby="off"
> node nfs2
> primitive p_drbd_web1 ocf:linbit:drbd \
> params drbd_resource="web1" \
> op monitor interval="15" role="Master" \
> op monitor interval="30" role="Slave"
> primitive p_fs_web1 ocf:heartbeat:Filesystem \
> params device="/dev/drbd0" \
> directory="/srv/nfs/web1" fstype="ext4" \
> op monitor interval="10s"
> ms ms_drbd_web1 p_drbd_web1 \
> meta master-max="1" master-node-max="1" \
> clone-max="2" clone-node-max="1" notify="true"
> colocation c_web1_on_drbd inf: ms_drbd_web1:Master p_fs_web1
Above means: "colocate ms_drbd_web1:Master with p_fs_web1", or "promote
ms_drbd_web1 where p_fs_web1 is (or "is about to be")".
Probably that is not exactly what you want (although that is also valid,
but uses different logic internally). I usually place resources in a
different order in colocation and order constraints, and that works.
> order o_drbd_before_web1 inf: ms_drbd_web1:promote p_fs_web1
> property $id="cib-bootstrap-options" \
> dc-version="1.1.8-7.el6-394e906" \
> cluster-infrastructure="classic openais (with plugin)" \
> expected-quorum-votes="2" \
> stonith-enabled="false" \
> no-quorum-policy="ignore" \
> last-lrm-refresh="1364259713" \
> maintenance-mode="false"
> rsc_defaults $id="rsc-options" \
> resource-stickiness="100"
>
> I cannot figure out what is wrong with this configuration.
>
> Regards,
> Dennis
>
> On 25.03.2013 13:09, Dennis Jacobfeuerborn wrote:
>> I just found the following in the dmesg output which might or might not
>> add to understanding the problem:
>>
>> device-mapper: table: 253:2: linear: dm-linear: Device lookup failed
>> device-mapper: ioctl: error adding target to table
>>
>> Regards,
>> Dennis
>>
>> On 25.03.2013 13:04, Dennis Jacobfeuerborn wrote:
>>> Hi,
>>> I'm currently trying create a two node redundant NFS setup on CentOS 6.4
>>> using pacemaker and crmsh.
>>>
>>> I use this Document as a starting poing:
>>> https://www.suse.com/documentation/sle_ha/singlehtml/book_sleha_techguides/book_sleha_techguides.html
>>>
>>>
>>>
>>>
>>> The first issue is that using these instructions I get the cluster up
>>> and running but the moment I try to stop the pacemaker service on the
>>> current master node several resources just fail and everything goes
>>> pear-shaped.
>>>
>>> Since the problem seems to relate to the nfs bits in the configuration I
>>> removed these in order to get to a minimal working setup and then add
>>> things piece by piece in order to find the source of the problem.
>>>
>>> Now I am at a point where I basically have only
>>> DRBD+LVM+Filesystems+IPAddr2 configured and now LVM seems to act up.
>>>
>>> I can start the cluster and everything is fine but the moment I stop
>>> pacemaker on the master i end up with this as a status:
>>>
>>> ===
>>> Node nfs2: standby
>>> Online: [ nfs1 ]
>>>
>>> Master/Slave Set: ms_drbd_nfs [p_drbd_nfs]
>>> Masters: [ nfs1 ]
>>> Stopped: [ p_drbd_nfs:1 ]
>>>
>>> Failed actions:
>>> p_lvm_nfs_start_0 (node=nfs1, call=505, rc=1, status=complete):
>>> unknown error
>>> ===
>>>
>>> and in the log on nfs1 I see:
>>> LVM(p_lvm_nfs)[7515]: 2013/03/25_12:34:21 ERROR: device-mapper:
>>> reload ioctl on failed: Invalid argument device-mapper: reload ioctl on
>>> failed: Invalid argument 2 logical volume(s) in volume group "nfs" now
>>> active
>>>
>>> However a lvs in this state shows:
>>> [root at nfs1 ~]# lvs
>>> LV VG Attr LSize Pool Origin Data% Move Log
>>> web1 nfs -wi------ 2,00g
>>> web2 nfs -wi------ 2,00g
>>> lv_root vg_nfs1.local -wi-ao--- 2,45g
>>> lv_swap vg_nfs1.local -wi-ao--- 256,00m
>>>
>>> So the volume group is present.
>>>
>>> My current configuration looks like this:
>>>
>>> node nfs1 \
>>> attributes standby="off"
>>> node nfs2 \
>>> attributes standby="on"
>>> primitive p_drbd_nfs ocf:linbit:drbd \
>>> params drbd_resource="nfs" \
>>> op monitor interval="15" role="Master" \
>>> op monitor interval="30" role="Slave"
>>> primitive p_fs_web1 ocf:heartbeat:Filesystem \
>>> params device="/dev/nfs/web1" \
>>> directory="/srv/nfs/web1" \
>>> fstype="ext4" \
>>> op monitor interval="10s"
>>> primitive p_fs_web2 ocf:heartbeat:Filesystem \
>>> params device="/dev/nfs/web2" \
>>> directory="/srv/nfs/web2" \
>>> fstype="ext4" \
>>> op monitor interval="10s"
>>> primitive p_ip_nfs ocf:heartbeat:IPaddr2 \
>>> params ip="10.99.0.142" cidr_netmask="24" \
>>> op monitor interval="30s"
>>> primitive p_lvm_nfs ocf:heartbeat:LVM \
>>> params volgrpname="nfs" \
>>> op monitor interval="30s"
>>> group g_nfs p_lvm_nfs p_fs_web1 p_fs_web2 p_ip_nfs
>>> ms ms_drbd_nfs p_drbd_nfs \
>>> meta master-max="1" \
>>> master-node-max="1" \
>>> clone-max="2" \
>>> clone-node-max="1" \
>>> notify="true"
>>> colocation c_nfs_on_drbd inf: g_nfs ms_drbd_nfs:Master
>>> property $id="cib-bootstrap-options" \
>>> dc-version="1.1.8-7.el6-394e906" \
>>> cluster-infrastructure="classic openais (with plugin)" \
>>> expected-quorum-votes="2" \
>>> stonith-enabled="false" \
>>> no-quorum-policy="ignore" \
>>> last-lrm-refresh="1364212090" \
>>> maintenance-mode="false"
>>> rsc_defaults $id="rsc_defaults-options" \
>>> resource-stickiness="100"
>>>
>>> Any ideas why this isn't working?
>>>
>>> Regards,
>>> Dennis
>>>
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>>>
>>> Project Home: http://www.clusterlabs.org
>>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>>> Bugs: http://bugs.clusterlabs.org
>>
>>
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>>
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>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://bugs.clusterlabs.org
>
>
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> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
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> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
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