On 21/06/14 04:26 AM, Gianluca Cecchi wrote:
Hello,
I have a CentOS 6.5 based cluster with
pacemaker-1.1.10-14.el6_5.3.x86_64
cman-3.0.12.1-59.el6_5.2.x86_64
and configured pacemaker with cman integration.
The nodes are two blades inside an Intel enclosure.
At the moment my configuration has this in cluster.conf
<fencedevices>
<fencedevice name="pcmk" agent="fence_pcmk"/>
</fencedevices>
and this if I run "pcs cluster edit"
<primitive id="Fencing" class="stonith" type="fence_intelmodular">
<instance_attributes id="Fencing-params">
<nvpair id="Fencing-passwd-script" name="passwd_script"
value="/usr/local/bin/fence_pwd.sh"/>
<nvpair id="Fencing-login" name="login" value="snmpv3user"/>
<nvpair id="Fencing-ipaddr" name="ipaddr"
value="192.168.150.150"/>
<nvpair id="Fencing-debug" name="power_wait" value="15"/>
<nvpair id="Fencing-snmp_version" name="snmp_version" value="3"/>
<nvpair id="Fencing-snmp_auth_prot" name="snmp_auth_prot"
value="SHA"/>
<nvpair id="Fencing-snmp_sec_level" name="snmp_sec_level"
value="authNoPriv"/>
<nvpair id="Fencing-pcmk_host_list" name="pcmk_host_list"
value="srvmgmt01.localdomain.local,srvmgmt02.localdomain.local"/>
<nvpair id="Fencing-pcmk_host_map" name="pcmk_host_map"
value="srvmgmt01.localdomain.local:5;srvmgmt02.localdomain.local:6"/>
</instance_attributes>
<operations>
<op id="Fencing-monitor-10m" interval="10m" name="monitor"
timeout="300s"/>
</operations>
</primitive>
If I want to set a delay on one of the two nodes to make it privileged
in case of split brain, what is the right place and how to put it?
Or do I have to decouple the fencing definition?
BTW: the fencing in general seems ok, but running crm_mon -1 on the two
nodes I have in my opinion confusing output (see below); is this expected?
[root@srvmgmt01 ~]# crm_mon -1
Last updated: Sat Jun 21 10:24:25 2014
Last change: Thu Jun 12 00:09:21 2014 via crmd on
srvmgmt01.localdomain.local
Stack: cman
Current DC: srvmgmt02.localdomain.local - partition with quorum
Version: 1.1.10-14.el6_5.3-368c726
2 Nodes configured
4 Resources configured
Online: [ srvmgmt01.localdomain.local srvmgmt02.localdomain.local ]
Master/Slave Set: ms_drbd_kvm-ovirtmgr [p_drbd_kvm-ovirtmgr]
Masters: [ srvmgmt01.localdomain.local ]
Slaves: [ srvmgmt02.localdomain.local ]
p_kvm-ovirtmgr (ocf::heartbeat:VirtualDomain): Started
srvmgmt01.localdomain.local
Fencing (stonith:fence_intelmodular): Started
srvmgmt02.localdomain.local
[root@srvmgmt02 ~]# crm_mon -1
Last updated: Sat Jun 21 10:24:19 2014
Last change: Thu Jun 12 00:09:21 2014 via crmd on
srvmgmt01.localdomain.local
Stack: cman
Current DC: srvmgmt02.localdomain.local - partition with quorum
Version: 1.1.10-14.el6_5.3-368c726
2 Nodes configured
4 Resources configured
Online: [ srvmgmt01.localdomain.local srvmgmt02.localdomain.local ]
Master/Slave Set: ms_drbd_kvm-ovirtmgr [p_drbd_kvm-ovirtmgr]
Masters: [ srvmgmt01.localdomain.local ]
Slaves: [ srvmgmt02.localdomain.local ]
p_kvm-ovirtmgr (ocf::heartbeat:VirtualDomain): Started
srvmgmt01.localdomain.local
Fencing (stonith:fence_intelmodular): Started
srvmgmt02.localdomain.local
Thanks in advance,
Gianluca
Hi Gianluca,
I'm not sure of the CIB XML syntax, but here is how it's done using pcs:
pcs cluster cib stonith_cfg
pcs -f stonith_cfg stonith create fence_n01_ipmi fence_ipmilan
pcmk_host_list="an-a04n01.alteeve.ca" ipaddr="an-a04n01.ipmi"
action="reboot" login="admin" passwd="Initial1" delay=15 op monitor
interval=10s
pcs -f stonith_cfg stonith create fence_n02_ipmi fence_ipmilan
pcmk_host_list="an-a04n02.alteeve.ca" ipaddr="an-a04n02.ipmi"
action="reboot" login="admin" passwd="Initial1" op monitor interval=10s
pcs cluster cib-push stonith_cfg
Note how the first (preferred node) has the delay="15" and the peer does
not. This uses fence_ipmilan, but just swap it (and the attributes) for
your fence method.
digimer
--
Digimer
Papers and Projects: https://alteeve.ca/w/
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