[Pacemaker] Pacemaker/corosync freeze

Andrew Beekhof andrew at beekhof.net
Tue Mar 11 00:48:08 CET 2014 

On 7 Mar 2014, at 5:54 pm, Attila Megyeri <amegyeri at minerva-soft.com> wrote:

> 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

Ah sorry, I seem to have missed that part.

> 
> 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?

The same thing as Lars, or switch to a distro that stays current with upstream (git shows 5 newer releases for that branch since it was released 3 years ago).
If you do build from source, its probably best to go with v1.4.6

> 
> 
>>> 
>>> 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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