[Pacemaker] Two node cluster and no hardware device for stonith.

[Michael Schwartzkopff]

Am Donnerstag, 22. Januar 2015, 10:03:38 schrieb E. Kuemmerle:
> On 21.01.2015 11:18 Digimer wrote:
> > On 21/01/15 08:13 AM, Andrea wrote:
> >> > Hi All,
> >> > 
> >> > I have a question about stonith
> >> > In my scenarion , I have to create 2 node cluster, but I don't have any
> >> > hardware device for stonith. No APC no IPMI ecc, no one of the list
> >> > returned by "pcs stonith list"
> >> > So, there is an option to do something?
> >> > This is my scenario:
> >> > - 2 nodes cluster
> >> > serverHA1
> >> > serverHA2
> >> > 
> >> > - Software
> >> > Centos 6.6
> >> > pacemaker.x86_64  1.1.12-4.el6
> >> > cman.x86_64       3.0.12.1-68.el6
> >> > corosync.x86_64   1.4.7-1.el6
> >> > 
> >> > -NO hardware device for stonith!

Are you sure that you do not have fencing hardware? Perhaps you just did nit 
configure it? Please read the manual of you BIOS and check your system board if 
you have a IPMI interface.


> >> > - Cluster creation ([ALL] operation done on all nodes, [ONE] operation
> >> > done
> >> > on only one node)
> >> > [ALL] systemctl start pcsd.service
> >> > [ALL] systemctl enable pcsd.service
> >> > [ONE] pcs cluster auth serverHA1 serverHA2
> >> > [ALL] echo "CMAN_QUORUM_TIMEOUT=0" >> /etc/sysconfig/cman
> >> > [ONE] pcs cluster setup --name MyCluHA serverHA1 serverHA2
> >> > [ONE] pcs property set stonith-enabled=false
> >> > [ONE] pcs property set no-quorum-policy=ignore
> >> > [ONE] pcs resource create ping ocf:pacemaker:ping dampen=5s
> >> > multiplier=1000
> >> > host_list=192.168.56.1 --clone
> >> > 
> >> > 
> >> > In my test, when I simulate network failure, split brain occurs, and
> >> > when
> >> > network come back, One node kill the other node
> >> > -log on node 1:
> >> > Jan 21 11:45:28 corosync [CMAN  ] memb: Sending KILL to node 2
> >> > 
> >> > -log on node 2:
> >> > Jan 21 11:45:28 corosync [CMAN  ] memb: got KILL for node 2

That is how fencing works.


Mit freundlichen Grüßen,

Michael Schwartzkopff

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