[Linux-cluster] force fencing

[Armanet Stephane]

Hello list

I'm trying to setup a 3 nodes Cluster with 2 failover Domain for an HA
mail solution.
I want 1 run active for the Imap server in the Imap Failover domain , 1
node active for the Smtp in the Smtp Failover domain and the 3rd in the
2 failover domain as a backup node.

I run Centos 5.3
My fence device is a wti power switch

My cluster.conf is in attachement

My SMTP service is composed of:
	1 IP
	1 amavisd scritp
	1 postfix script
	2 NFS mount for postfix and amavis

If I manually kill the postfix master process (to simulate a crash), my
node is not fence and the logs said:

Jul  6 10:00:40 centos-smtp1 clurgmgrd: [4228]: <info> Executing
/etc/init.d/postfix status
Jul  6 10:00:40 centos-smtp1 clurgmgrd: [4228]: <err> script:postfix:
status of /etc/init.d/postfix failed (returned 3)
Jul  6 10:00:40 centos-smtp1 clurgmgrd[4228]: <notice> status on script
"postfix" returned 1 (generic error)
Jul  6 10:00:40 centos-smtp1 clurgmgrd[4228]: <notice> Stopping service
service:Postfix
Jul  6 10:00:40 centos-smtp1 clurgmgrd: [4228]: <info> Executing
/etc/init.d/amavisd stop
Jul  6 10:00:40 centos-smtp1 kernel: do_vfs_lock: VFS is out of sync
with lock manager!
Jul  6 10:00:40 centos-smtp1 last message repeated 8 times
Jul  6 10:00:41 centos-smtp1 clurgmgrd: [4228]: <info> Executing
/etc/init.d/postfix stop
Jul  6 10:00:41 centos-smtp1 clurgmgrd: [4228]: <err> script:postfix:
stop of /etc/init.d/postfix failed (returned 1)
Jul  6 10:00:41 centos-smtp1 clurgmgrd[4228]: <notice> stop on script
"postfix" returned 1 (generic error)
Jul  6 10:00:41 centos-smtp1 clurgmgrd: [4228]: <info> Removing IPv4
address 195.83.126.201/24 from bond0
Jul  6 10:00:41 centos-smtp1 avahi-daemon[3552]: Withdrawing address
record for 195.83.126.201 on bond0.
Jul  6 10:00:51 centos-smtp1 clurgmgrd: [4228]: <info> unmounting
/var/lib/amavis
Jul  6 10:00:51 centos-smtp1 clurgmgrd: [4228]: <info> unmounting
/var/spool/postfix
Jul  6 10:00:51 centos-smtp1 clurgmgrd[4228]: <crit> #12: RG
service:Postfix failed to stop; intervention required
Jul  6 10:00:51 centos-smtp1 clurgmgrd[4228]: <notice> Service
service:Postfix is failed
Jul  6 10:00:52 centos-smtp1 ntpd[3322]: synchronized to 195.83.126.119,
stratum 1

Clustat said:

Cluster Status for cluster-test @ Mon Jul  6 10:02:39 2009
Member Status: Quorate

 Member Name                                                     ID   Status
 ------ ----                                                     ---- ------
 centos-imap1.ill.fr                                                 1
Online, Local, rgmanager
 centos-imap2.ill.fr                                                 2
Online, rgmanager
 centos-smtp1.ill.fr                                                 3
Online, rgmanager
 /dev/disk/by-id/scsi-360a98000567247514634507447594661-part1        0
Online, Quorum Disk

 Service Name                                                   Owner
(Last)                                                   State
 ------- ----                                                   -----
------                                                   -----
 service:Imap
centos-imap2.ill.fr                                            started

 service:Postfix
(centos-smtp1.ill.fr)                                          failed




So I have to disable the Postfix servcie with:
	clusvcadm -d Postfix
and re-enable
	clusvcadm -e Postfix



Could you explain my why my original smtp node is not fenced and why my
service is not start on the 2nd node ???

Is there a way to force the fencing ???


-- 
ARMANET Stephane
Division Projet Technique
Service Informatique
  Groupe Infrastructure

Institut Laue langevin
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