[Pacemaker] DRBD+LVM+NFS problems
Dennis Jacobfeuerborn
dennisml at conversis.de
Mon Mar 25 21:23:15 EDT 2013
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
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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>
>
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