[Pacemaker] Replacing sbd devices in running cluster

[Gregory House]

Hi Pacemaker Experts

I have inherited a pacemaker cluster running on the SLES11SP1 stack.
Sadly there is no support contract any more.

# rpm -qa | egrep 'pacemaker'
pacemaker-mgmt-2.0.0-0.5.5
pacemaker-mgmt-client-2.0.0-0.5.5
pacemaker-1.1.5-5.9.11.1
libpacemaker3-1.1.5-5.9.11.1
drbd-pacemaker-8.3.11-0.3.1

I need to migrate both SBD devices. I.e. /dev/sdX and /dev/sdY. to
/dev/sdA and /dev/sdB

It is required to do this without service downtime.

The sbd resource is running OK:

# crm_mon -1 | grep sbd
stonith_sbd_is (stonith:external/sbd): Started node1

and is configured as follows

# crm configure show | grep sbd
primitive stonith_sbd_is stonith:external/sbd \
params sbd_device="/dev/sdX;/dev/sdY"

and sbd processes are running from this config

# cat /etc/sysconfig/sbd
SBD_DEVICE="/dev/sdX;/dev/sdY"
SBD_OPTS="-W"

pstree -halp | grep sbd
|-sbd,8797
| |-sbd,8798
| `-sbd,8799

(similarly on node2)

The resources are all running, and both nodes are OK

# crm_mon
Last updated: Thu Jan 29 18:52:53 2015
Stack: openais
Current DC: s987l1020 - partition with quorum
Version: 1.1.5-5bd2b9154d7d9f86d7f56fe0a74072a5a6590c60
2 Nodes configured, 2 expected votes
61 Resources configured.
============

Online: [ node1 node2]

stonith_sbd_is (stonith:external/sbd): Started node1
....


Is this change possible without stopping the cluster? If so, how
should I best implement?

With downtime I guess all I would need to do is change the
/etc/sysconfig/sbd file, change the settings within the cluster via
crm, and restart everything. But I cannot see the cluster surviving
this without a downtime?

Best
GH

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[emmanuel segura]

from one of two:

/dev/sdX and /dev/sdY

sbd -d "/dev/sdX;/dev/sdY" message node1 exit
sbd -d "/dev/sdX;/dev/sdY" message node2 exit

sbd -d /dev/sdA create && sbd -d /dev/sdB create

Now in every cluster node

sbd -d "/dev/sdA;/dev/sdB" -D -W watch


If you speficy your sbd devices in /etc/sysconfig/sbd, you don't need
to use "params sbd_device="/dev/sdX;/dev/sdY"

Post by Gregory House
Hi Pacemaker Experts
I have inherited a pacemaker cluster running on the SLES11SP1 stack.
Sadly there is no support contract any more.
# rpm -qa | egrep 'pacemaker'
pacemaker-mgmt-2.0.0-0.5.5
pacemaker-mgmt-client-2.0.0-0.5.5
pacemaker-1.1.5-5.9.11.1
libpacemaker3-1.1.5-5.9.11.1
drbd-pacemaker-8.3.11-0.3.1
I need to migrate both SBD devices. I.e. /dev/sdX and /dev/sdY. to
/dev/sdA and /dev/sdB
It is required to do this without service downtime.
# crm_mon -1 | grep sbd
stonith_sbd_is (stonith:external/sbd): Started node1
and is configured as follows
# crm configure show | grep sbd
primitive stonith_sbd_is stonith:external/sbd \
params sbd_device="/dev/sdX;/dev/sdY"
and sbd processes are running from this config
# cat /etc/sysconfig/sbd
SBD_DEVICE="/dev/sdX;/dev/sdY"
SBD_OPTS="-W"
pstree -halp | grep sbd
|-sbd,8797
| |-sbd,8798
| `-sbd,8799
(similarly on node2)
The resources are all running, and both nodes are OK
# crm_mon
Last updated: Thu Jan 29 18:52:53 2015
Stack: openais
Current DC: s987l1020 - partition with quorum
Version: 1.1.5-5bd2b9154d7d9f86d7f56fe0a74072a5a6590c60
2 Nodes configured, 2 expected votes
61 Resources configured.
============
Online: [ node1 node2]
stonith_sbd_is (stonith:external/sbd): Started node1
....
Is this change possible without stopping the cluster? If so, how
should I best implement?
With downtime I guess all I would need to do is change the
/etc/sysconfig/sbd file, change the settings within the cluster via
crm, and restart everything. But I cannot see the cluster surviving
this without a downtime?
Best
GH
_______________________________________________
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org

--
esta es mi vida e me la vivo hasta que dios quiera

_______________________________________________
Pacemaker mailing list: ***@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker

Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org

[Lars Marowsky-Bree]

Post by Gregory House
/dev/sdX and /dev/sdY
sbd -d "/dev/sdX;/dev/sdY" message node1 exit
sbd -d "/dev/sdX;/dev/sdY" message node2 exit
sbd -d /dev/sdA create && sbd -d /dev/sdB create
Now in every cluster node
sbd -d "/dev/sdA;/dev/sdB" -D -W watch

This command will not work. You need to specify the devices separately
for sbd:

sbd -d /dev/sdX -d /dev/sdY


Regards,
Lars
--
Architect Storage/HA
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde


_______________________________________________
Pacemaker mailing list: ***@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker

Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org

[emmanuel segura]

yes Lars, you are right,

I forgot to look in /etc/init.d/openais

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

SBD_DEVS=${SBD_DEVICE%;}
SBD_DEVICE=${SBD_DEVS//;/ -d }

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

Thanks

Post by Lars Marowsky-Bree

Post by Gregory House
/dev/sdX and /dev/sdY
sbd -d "/dev/sdX;/dev/sdY" message node1 exit
sbd -d "/dev/sdX;/dev/sdY" message node2 exit
sbd -d /dev/sdA create && sbd -d /dev/sdB create
Now in every cluster node
sbd -d "/dev/sdA;/dev/sdB" -D -W watch

This command will not work. You need to specify the devices separately
sbd -d /dev/sdX -d /dev/sdY
Regards,
Lars
--
Architect Storage/HA
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
_______________________________________________
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org