[Pacemaker] Pacemaker/corosync freeze

Attila Megyeri amegyeri at minerva-soft.com
Fri Mar 7 08:08:41 UTC 2014 

One more thing to add. I did an apt-get upgrade on one of the nodes, and then restarted the node. It resulted in this state on all other nodes again...

> -----Original Message-----
> From: Attila Megyeri [mailto:amegyeri at minerva-soft.com]
> Sent: Friday, March 07, 2014 7:54 AM
> To: The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] Pacemaker/corosync freeze
> 
> 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
> > > Bugs: http://bugs.clusterlabs.org
> 
> 
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> 
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