[Linux-cluster] cman + qdisk timeouts....

[Moralejo, Alfredo]

Hi,

I'm having what I think is a timeouts issue in my cluster.

I have a two node cluster using qdisk. Everytime the node that has the master role for qdisk becomes down (for failure or even stopping qdiskd manually), packages in the sane node are stopped because of the lack of quorum as the qdiskd becames unresponsive until second node becames master node and start working properly. Once qdiskd start working fine (usually 5-6 seconds) packages are started again.

I've read in the cluster manual section for "CMAN membership timeout value" and I think this is the case. I've used RHEL 5.3 and I thought this parameter is the token that I set much longer that needed:

<cluster alias="CLUSTER_ENG" config_version="75" name="CLUSTER_ENG">
        <totem token="50000"/>
...

        <quorumd device="/dev/mapper/mpathquorump1" interval="3" status_file="/tmp/qdisk" tko="3" votes="5" log_level="7" log_facility="local4"/>


Totem token is much more that double of qdisk timeout, so I guess it should be enough but everytime qdisk dies in the master node I get same result, services restarted in the sane node:

Jun 15 16:11:33 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (2/3)
Jun 15 16:11:38 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (3/3)
Jun 15 16:11:43 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (4/3)
Jun 15 16:11:43 rmamseslab07 qdiskd[14130]: <debug> Node 1 DOWN
Jun 15 16:11:43 rmamseslab07 qdiskd[14130]: <debug> Making bid for master
Jun 15 16:11:44 rmamseslab07 clurgmgrd: [18510]: <info> Executing /etc/init.d/watchdog status
Jun 15 16:11:48 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (5/3)
Jun 15 16:11:53 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (6/3)
Jun 15 16:11:53 rmamseslab07 qdiskd[14130]: <info> Assuming master role

Message from syslogd at rmamseslab07 at Jun 15 16:11:53 ...
 clurgmgrd[18510]: <emerg> #1: Quorum Dissolved
Jun 15 16:11:53 rmamseslab07 openais[14087]: [CMAN ] lost contact with quorum device
Jun 15 16:11:53 rmamseslab07 openais[14087]: [CMAN ] quorum lost, blocking activity
Jun 15 16:11:53 rmamseslab07 clurgmgrd[18510]: <debug> Membership Change Event
Jun 15 16:11:53 rmamseslab07 clurgmgrd[18510]: <emerg> #1: Quorum Dissolved
Jun 15 16:11:53 rmamseslab07 clurgmgrd[18510]: <debug> Emergency stop of service:Cluster_test_2
Jun 15 16:11:53 rmamseslab07 clurgmgrd[18510]: <debug> Emergency stop of service:wdtcscript-rmamseslab05-ic
Jun 15 16:11:53 rmamseslab07 clurgmgrd[18510]: <debug> Emergency stop of service:wdtcscript-rmamseslab07-ic
Jun 15 16:11:54 rmamseslab07 clurgmgrd[18510]: <debug> Emergency stop of service:Logical volume 1
Jun 15 16:11:58 rmamseslab07 qdiskd[14130]: <debug> Node 1 missed an update (7/3)
Jun 15 16:11:58 rmamseslab07 qdiskd[14130]: <notice> Writing eviction notice for node 1
Jun 15 16:11:58 rmamseslab07 qdiskd[14130]: <debug> Telling CMAN to kill the node
Jun 15 16:11:58 rmamseslab07 openais[14087]: [CMAN ] quorum regained, resuming activity

I've just logged a case but... any idea????

Regards,



Alfredo Moralejo
Business Platforms Engineering - OS Servers - UNIX Senior Specialist
F. Hoffmann-La Roche Ltd.
Global Informatics Group Infrastructure
Josefa Valcárcel, 40
28027 Madrid SPAIN

Phone: +34 91 305 97 87

alfredo.moralejo at roche.com<mailto:alfredo.moralejo at roche.com>

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