I'm having some issues with getting some cluster monitoring setup and configured on a 3 node multi-state cluster. I'm using Florian's blog as an example http://floriancrouzat.net/2013/01/monitor-a-pacemaker-cluster-with-ocfpacemakerclustermon-andor-external-agent/.
When I create the primitive resource it starts on one of my nodes but spawns
multiple instances of crm_mon. I don't see any reason that would cause it to
spawn multiple instances, its very odd behavior.
I was also looking for some clarification on what this resource provides….it
looks to me that it kicks off a crm_mon in daemon mode that will update a .html
file and with -E it will run an external script. But the resource itself
doesn't trigger anything if another resource changes state only if the crm_mon
process ( monitored with PID ) fails and it has to restart. If this is correct
what is the best practice for monitoring additional resource states?
v/r
STEVE
Below are some additional data points.
Creating the Resource
[root@pgdb2 tmp]# crm configure primitive SNMPMon ocf:pacemaker:ClusterMon \
> params user="root" update="30" extra_options="-E
> /usr/local/bin/pcmk_snmp_helper.sh -e zen.arin.net" \
> op monitor on-fail="restart" interval="60"
Manual crm_mon output
Last updated: Thu May 9 10:24:30 2013
Last change: Thu May 9 10:20:49 2013 via cibadmin on pgdb2.example.com
Stack: cman
Current DC: pgdb1.example.com - partition with quorum
Version: 1.1.8-7.el6-394e906
3 Nodes configured, unknown expected votes
6 Resources configured.
Node pgdb1.example.com: standby
Online: [ pgdb2.example.com pgdb3.example.com ]
PG_REP_VIP (ocf::heartbeat:IPaddr2): Started pgdb2.example.com
PG_CLI_VIP (ocf::heartbeat:IPaddr2): Started pgdb2.example.com
Master/Slave Set: msPGSQL [PGSQL]
Masters: [ pgdb2.example.com ]
Slaves: [ pgdb3.example.com ]
Stopped: [ PGSQL:2 ]
SNMPMon (ocf::pacemaker:ClusterMon): Started pgdb3.example.com
PS to check for process on pgdb3
[root@pgdb3 tmp]# ps aux | grep crm_mon
root 16097 0.0 0.0 82624 2784 ? S 10:20 0:00
/usr/sbin/crm_mon -p /tmp/ClusterMon_SNMPMon.pid -d -i 0 -E
/usr/local/bin/pcmk_snmp_helper.sh -e zen.arin.net -h
/tmp/ClusterMon_SNMPMon.html
root 16099 0.0 0.0 82624 2660 ? S 10:20 0:00
/usr/sbin/crm_mon -p /tmp/ClusterMon_SNMPMon.pid -d -i 0 -E
/usr/local/bin/pcmk_snmp_helper.sh -e zen.arin.net -h
/tmp/ClusterMon_SNMPMon.html
root 16104 0.0 0.0 82624 2448 ? S 10:20 0:00
/usr/sbin/crm_mon -p /tmp/ClusterMon_SNMPMon.pid -d -i 0 -E
/usr/local/bin/pcmk_snmp_helper.sh -e zen.arin.net -h
/tmp/ClusterMon_SNMPMon.html
root 16515 0.0 0.0 103244 852 pts/0 S+ 10:21 0:00 grep crm_mon
Output from corosync.log
May 09 10:20:51 [3100] pgdb3.cha.arin.net lrmd: info:
process_lrmd_get_rsc_info: Resource 'SNMPMon' not found (3 active
resources)
May 09 10:20:51 [3100] pgdb3.cha.arin.net lrmd: info:
process_lrmd_rsc_register: Added 'SNMPMon' to the rsc list (4 active
resources)
May 09 10:20:52 [3103] pgdb3.cha.arin.net crmd: info:
services_os_action_execute: Managed ClusterMon_meta-data_0 process 16010
exited with rc=0
May 09 10:20:52 [3103] pgdb3.cha.arin.net crmd: notice:
process_lrm_event: LRM operation SNMPMon_monitor_0 (call=61, rc=7,
cib-update=28, confirmed=true) not running
May 09 10:20:52 [3103] pgdb3.cha.arin.net crmd: notice:
process_lrm_event: LRM operation SNMPMon_start_0 (call=64, rc=0,
cib-update=29, confirmed=true) ok
May 09 10:20:52 [3103] pgdb3.cha.arin.net crmd: notice:
process_lrm_event: LRM operation SNMPMon_monitor_60000 (call=67, rc=0,
cib-update=30, confirmed=false) ok
signature.asc
Description: Message signed with OpenPGP using GPGMail
_______________________________________________ Pacemaker mailing list: Pacemaker@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
