[Pacemaker] Pacemaker/corosync freeze
Attila Megyeri
amegyeri at minerva-soft.com
Fri Mar 7 07:54:26 CET 2014
Thanks for the quick response!
> -----Original Message-----
> From: Andrew Beekhof [mailto:andrew at beekhof.net]
> Sent: Friday, March 07, 2014 3:48 AM
> To: The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] Pacemaker/corosync freeze
>
>
> On 7 Mar 2014, at 5:31 am, Attila Megyeri <amegyeri at minerva-soft.com>
> wrote:
>
> > Hello,
> >
> > We have a strange issue with Corosync/Pacemaker.
> > From time to time, something unexpected happens and suddenly the
> crm_mon output remains static.
> > When I check the cpu usage, I see that one of the cores uses 100% cpu, but
> cannot actually match it to either the corosync or one of the pacemaker
> processes.
> >
> > In such a case, this high CPU usage is happening on all 7 nodes.
> > I have to manually go to each node, stop pacemaker, restart corosync, then
> start pacemeker. Stoping pacemaker and corosync does not work in most of
> the cases, usually a kill -9 is needed.
> >
> > Using corosync 2.3.0, pacemaker 1.1.10 on Ubuntu trusty.
> >
> > Using udpu as transport, two rings on Gigabit ETH, rro_mode passive.
> >
> > Logs are usually flooded with CPG related messages, such as:
> >
> > Mar 06 18:10:49 [1316] ctsip1 crmd: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=8): Try again (6)
> > Mar 06 18:10:49 [1316] ctsip1 crmd: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=8): Try again (6)
> > Mar 06 18:10:50 [1316] ctsip1 crmd: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=8): Try again (6)
> > Mar 06 18:10:50 [1316] ctsip1 crmd: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=8): Try again (6)
> >
> > OR
> >
> > Mar 06 17:46:24 [1341] ctdb1 cib: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=10933): Try again (
> > Mar 06 17:46:24 [1341] ctdb1 cib: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=10933): Try again (
> > Mar 06 17:46:24 [1341] ctdb1 cib: info: crm_cs_flush: Sent 0 CPG
> messages (1 remaining, last=10933): Try again (
>
> That is usually a symptom of corosync getting into a horribly confused state.
> Version? Distro? Have you checked for an update?
> Odd that the user of all that CPU isn't showing up though.
>
> >
As I wrote I use Ubuntu trusty, the exact package versions are:
corosync 2.3.0-1ubuntu5
pacemaker 1.1.10+git20130802-1ubuntu2
There are no updates available. The only option is to install from sources, but that would be very difficult to maintain and I'm not sure I would get rid of this issue.
What do you recommend?
> >
> > HTOP show something like this (sorted by TIME+ descending):
> >
> >
> >
> > 1 [||||||||||||||||||||||||||||||||||||||||100.0%] Tasks: 59, 4
> thr; 2 running
> > 2 [| 0.7%] Load average: 1.00 0.99 1.02
> > Mem[|||||||||||||||||||||||||||||||| 165/994MB] Uptime: 1
> day, 10:22:03
> > Swp[ 0/509MB]
> >
> > PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
> > 921 root 20 0 188M 49220 33856 R 0.0 4.8 3h33:58 /usr/sbin/corosync
> > 1277 snmp 20 0 45708 4248 1472 S 0.0 0.4 1:33.07 /usr/sbin/snmpd -
> Lsd -Lf /dev/null -u snmp -g snm
> > 1311 hacluster 20 0 109M 16160 9640 S 0.0 1.6 1:12.71
> /usr/lib/pacemaker/cib
> > 1312 root 20 0 104M 7484 3780 S 0.0 0.7 0:38.06
> /usr/lib/pacemaker/stonithd
> > 1611 root -2 0 4408 2356 2000 S 0.0 0.2 0:24.15 /usr/sbin/watchdog
> > 1316 hacluster 20 0 122M 9756 5924 S 0.0 1.0 0:22.62
> /usr/lib/pacemaker/crmd
> > 1313 root 20 0 81784 3800 2876 S 0.0 0.4 0:18.64
> /usr/lib/pacemaker/lrmd
> > 1314 hacluster 20 0 96616 4132 2604 S 0.0 0.4 0:16.01
> /usr/lib/pacemaker/attrd
> > 1309 root 20 0 104M 4804 2580 S 0.0 0.5 0:15.56 pacemakerd
> > 1250 root 20 0 33000 1192 928 S 0.0 0.1 0:13.59 ha_logd: read process
> > 1315 hacluster 20 0 73892 2652 1952 S 0.0 0.3 0:13.25
> /usr/lib/pacemaker/pengine
> > 1252 root 20 0 33000 712 456 S 0.0 0.1 0:13.03 ha_logd: write process
> > 1835 ntp 20 0 27216 1980 1408 S 0.0 0.2 0:11.80 /usr/sbin/ntpd -p
> /var/run/ntpd.pid -g -u 105:112
> > 899 root 20 0 19168 700 488 S 0.0 0.1 0:09.75 /usr/sbin/irqbalance
> > 1642 root 20 0 30696 1556 912 S 0.0 0.2 0:06.49 /usr/bin/monit -c
> /etc/monit/monitrc
> > 4374 kamailio 20 0 291M 7272 2188 S 0.0 0.7 0:02.77
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> > 3079 root 0 -20 16864 4592 3508 S 0.0 0.5 0:01.51 /usr/bin/atop -a -w
> /var/log/atop/atop_20140306 6
> > 445 syslog 20 0 249M 6276 976 S 0.0 0.6 0:01.16 rsyslogd
> > 4373 kamailio 20 0 291M 7492 2396 S 0.0 0.7 0:01.03
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> > 1 root 20 0 33376 2632 1404 S 0.0 0.3 0:00.63 /sbin/init
> > 453 syslog 20 0 249M 6276 976 S 0.0 0.6 0:00.63 rsyslogd
> > 451 syslog 20 0 249M 6276 976 S 0.0 0.6 0:00.53 rsyslogd
> > 4379 kamailio 20 0 291M 6224 1132 S 0.0 0.6 0:00.38
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> > 4380 kamailio 20 0 291M 8516 3084 S 0.0 0.8 0:00.38
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> > 4381 kamailio 20 0 291M 8252 2828 S 0.0 0.8 0:00.37
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> > 23315 root 20 0 24872 2476 1412 R 0.7 0.2 0:00.37 htop
> > 4367 kamailio 20 0 291M 10000 4864 S 0.0 1.0 0:00.36
> /usr/local/sbin/kamailio -f /etc/kamailio/kamaili
> >
> >
> > My questions:
> > - Is this a cororync or pacameker issue?
> > - What are the CPG messages? Is it possible that we have a firewall issue?
> >
> >
> > Any hints would be great!
> >
> > Thanks,
> > Attila
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at 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
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