[Pacemaker] Errors in configuring cluster project with DRBD and OCFS2, Help !

[Jake Smith]

----- Original Message ----- 

> From: "Jonathan-Marc Lapointe" <jmlapointe at ccdmd.qc.ca>
> To: Pacemaker at oss.clusterlabs.org
> Sent: Wednesday, June 19, 2013 8:21:03 AM
> Subject: [Pacemaker] Errors in configuring cluster project with DRBD
> and OCFS2, Help !

> Hi,

> I have a project I'm working on and I'm stuck right now.

> I'm building a cluster of 2 load balanced web server and I'm using
> DRBD, OCFS2 and Pacemaker/Corosync.

> My Problem is with configuring Pacemaker, the rest is working fine.

> Here is the config I used to configure my resources:

> --------------------------------------------------------------------------------
> primitive p_drbd_ocfs2 ocf:linbit:drbd \
> params drbd_resource="ocfs2"
> ms ms_drbd_ocfs2 p_drbd_ocfs2 \
> meta master-max=2 clone-max=2
> primitive p_controld ocf:pacemaker:controld
> primitive p_o2cb ocf:pacemaker:o2cb
> group g_ocfs2mgmt p_controld p_o2cb
> clone cl_ocfs2mgmt g_ocfs2mgmt \
> meta interleave=true
> primitive p_fs_ocfs2 ocf:heartbeat:Filesystem \
> params device="/dev/drbd0" directory="/mnt/data" fstype="ocfs2"
> options="rw,noatime"
> clone cl_fs_ocfs2 p_fs_ocfs2
> order o_ocfs2 inf: ms_drbd_ocfs2:promote cl_ocfs2mgmt:start
> cl_fs_ocfs2:start
> colocation c_ocfs2 inf: cl_fs_ocfs2 cl_ocfs2mgmt ms_drbd_ocfs2:Master

Pretty sure your problem is this colocation statement.  Try running crm configure show xml c_ocfs2 and see if the order of cl_fs and cl_ocf2mgmt is reversed from what it should be. When you have more than two resources in a colocation statement they become a set and the order of a set is reversed.  This means the colocation is saying that controld must run with o2cb must run with filesystem must run with drbd:Master.

You could just add p_fs_ocfs2 to the end of the g_ocfs2mgmt group instead of being separate (my preference) or reverse the first two resources in the colocation (knowing they are parsed the other way around) or you could write the colocations in two statements with only two resources each.

HTH

Jake

> --------------------------------------------------------------------------------

> But when I commit it, I get the following errors in crm_mon that I
> don't understand:

> --------------------------------------------------------------------------------
> ============
> Last updated: Tue Jun 18 16:36:02 2013
> Last change: Tue Jun 18 16:36:02 2013 via crm_shadow on web1dev
> Stack: openais
> Current DC: web1dev - partition with quorum
> Version: 1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c
> 2 Nodes configured, 2 expected votes
> 8 Resources configured.
> ============

> Online: [ web2dev web1dev ]

> Master/Slave Set: ms_drbd_ocfs2 [p_drbd_ocfs2]
> p_drbd_ocfs2:0 (ocf::linbit:drbd): Slave web1dev (unmanaged) FAILED
> p_drbd_ocfs2:1 (ocf::linbit:drbd): Slave web2dev (unmanaged) FAILED

> Failed actions:
> p_drbd_ocfs2:0_stop_0 (node=web1dev, call=10, rc=6, status=complete):
> not configured
> p_controld:0_monitor_0 (node=web1dev, call=6, rc=5, status=complete):
> not installed
> p_drbd_ocfs2:1_stop_0 (node=web2dev, call=10, rc=6, status=complete):
> not configured
> p_controld:0_monitor_0 (node=web2dev, call=6, rc=5, status=complete):
> not installed
> --------------------------------------------------------------------------------

> Any help appreciated !

> Thanx !

> CCDMD 20 ans !

> Jonathan-Marc Lapointe
> Technicien en informatique,
> Administrateur système,
> Administrateur réseau

> Centre collégial de développement de matériel didactique
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> Montréal (Québec) H1N 1C1
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> www.ccdmd.qc.ca
> jmlapointe at ccdmd.qc.ca
> Skype: jmlccdmd

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