[Pacemaker] pacemaker won't start mysql in the second node

Liang.Ma at asc-csa.gc.ca Liang.Ma at asc-csa.gc.ca
Mon Jan 31 14:41:11 UTC 2011 

Hi,

Thanks for your hints. I went through the cluster logs more carefully. By comparing the logs from the two nodes, the real different is after the line 

info: process_lrm_event: LRM operation fs_mysql_start_0

On node arsvr1, after that line we got a confirmation on Action fs_mysql_start_0 as such

info: match_graph_event: Action fs_mysql_start_0 (8) confirmed on arsvr1

and then went on to Initiating action 9: start mysql_start_0 on arsvr1 (local).

However on node arsvr2, we never see the confirmation from Action fs_mysql_start_0. So mysql_start_0 is never called. But the strange thing is, I can see the drbd partition of fs_mysql is properly mounted on arsvr2. Anyone knows what might stop arsvr2 to run that Action fs_mysql_start_0 (8) confirmed?

Thanks in advance.

Here are the logs from the two nodes.

Logs on Node 2:

Jan 28 14:24:23 arsvr2 lrmd: [919]: info: rsc:fs_mysql:229: start Jan 28 14:24:23 arsvr2 Filesystem[1568]: [1596]: INFO: Running start for /dev/drbd/by-res/r0 on /var/lib/mysql Jan 28 14:24:23 arsvr2 lrmd: [919]: info: RA output:
(fs_mysql:start:stderr) FATAL: Module scsi_hostadapter not found.
Jan 28 14:24:23 arsvr2 Filesystem[1568]: [1606]: INFO: Starting filesystem check on /dev/drbd/by-res/r0 Jan 28 14:24:23 arsvr2 lrmd: [919]: info: RA output:
(fs_mysql:start:stdout) fsck from util-linux-ng 2.17.2 Jan 28 14:24:23 arsvr2 lrmd: [919]: info: RA output:
(fs_mysql:start:stdout) /dev/drbd0: clean, 178/3276800 files,
257999/13106791 blocks
Jan 28 14:24:23 arsvr2 crmd: [922]: info: process_lrm_event: LRM operation fs_mysql_start_0 (call=229, rc=0, cib-update=251,
confirmed=true) ok
Jan 28 14:24:46 arsvr2 cib: [918]: info: cib_stats: Processed 149 operations (0.00us average, 0% utilization) in the last 10min

Logs on Node 1:

Jan 28 14:28:58 arsvr1 lrmd: [1065]: info: rsc:fs_mysql:867: start Jan 28 14:28:58 arsvr1 crmd: [1068]: info: te_rsc_command: Initiating action 31: monitor drbd_mysql:1_monitor_15000 on arsvr2 Jan 28 14:28:58 arsvr1 Filesystem[516]: [544]: INFO: Running start for /dev/drbd/by-res/r0 on /var/lib/mysql Jan 28 14:28:58 arsvr1 lrmd: [1065]: info: RA output:
(fs_mysql:start:stderr) FATAL: Module scsi_hostadapter not found.
Jan 28 14:28:58 arsvr1 Filesystem[516]: [554]: INFO: Starting filesystem check on /dev/drbd/by-res/r0 Jan 28 14:28:58 arsvr1 lrmd: [1065]: info: RA output:
(fs_mysql:start:stdout) fsck from util-linux-ng 2.17.2 Jan 28 14:28:58 arsvr1 lrmd: [1065]: info: RA output:
(fs_mysql:start:stdout) /dev/drbd0: clean, 178/3276800 files,
257999/13106791 blocks
Jan 28 14:28:58 arsvr1 crmd: [1068]: info: process_lrm_event: LRM operation fs_mysql_start_0 (call=867, rc=0, cib-update=1650,
confirmed=true) ok
Jan 28 14:28:58 arsvr1 crmd: [1068]: info: match_graph_event: Action fs_mysql_start_0 (8) confirmed on arsvr1 (rc=0) 
Jan 28 14:28:58 arsvr1 crmd: [1068]: info: te_rsc_command: Initiating action 9: start mysql_start_0 on arsvr1 (local) 
Jan 28 14:28:58 arsvr1 crmd: [1068]: info: do_lrm_rsc_op: Performing key=9:551:0:9c402121-906c-42de-a18a-68deb24208cb op=mysql_start_0 ) 
Jan 28 14:28:58 arsvr1 lrmd: [1065]: info: rsc:mysql:868: start 
Jan 28 14:28:58 arsvr1 mysqld_safe: Starting mysqld daemon with databases from /var/lib/mysql 
Jan 28 14:28:59 arsvr1 crmd: [1068]: info: match_graph_event: Action drbd_mysql:1_monitor_15000 (31) confirmed on arsvr2 (rc=0) 
Jan 28 14:29:02 arsvr1 mysql[576]: [728]: INFO: MySQL started 
Jan 28 14:29:02 arsvr1 crmd: [1068]: info: process_lrm_event: LRM operation mysql_start_0 (call=868, rc=0, cib-update=1651,
confirmed=true) ok
Jan 28 14:29:02 arsvr1 crmd: [1068]: info: match_graph_event: Action mysql_start_0 (9) confirmed on arsvr1 (rc=0) 


Liang Ma
Contractuel | Consultant | SED Systems Inc. 
Ground Systems Analyst
Agence spatiale canadienne | Canadian Space Agency
6767, Route de l'Aéroport, Longueuil (St-Hubert), QC, Canada, J3Y 8Y9
Tél/Tel : (450) 926-5099 | Téléc/Fax: (450) 926-5083
Courriel/E-mail : [liang.ma at space.gc.ca]
Site web/Web site : [www.space.gc.ca ] 




-----Original Message-----
From: Dejan Muhamedagic [mailto:dejanmm at fastmail.fm] 
Sent: January 28, 2011 11:09 AM
To: The Pacemaker cluster resource manager
Subject: Re: [Pacemaker] pacemaker won't start mysql in the second node

On Fri, Jan 28, 2011 at 08:50:45AM -0500, Liang.Ma at asc-csa.gc.ca wrote:
> Hi Dejan, thanks for your reply.
> 
> That's one of the problem. I don't see any logs in log file /var/log/mysql/error.log.

I meant the cluster logs.

> I checked the permission of directories /var/run/mysqld and /var/log/mysql. In both nodes they are the same as
> 
> drwxr-xr-x 2 mysql root 40 2011-01-27 13:50 /var/run/mysqld/
> drwxr-s--- 2 mysql adm 4096 2011-01-27 11:34 /var/log/mysql
> 
> By the way, under which user pacemaker runs, root or someone else?

pacemaker is a collection of programs. At any rate, the RA run
as root, but may su to another user (mysql) depending on the
resource configuration.

Thanks,

Dejan

> Liang Ma
> Contractuel | Consultant | SED Systems Inc. 
> Ground Systems Analyst
> Agence spatiale canadienne | Canadian Space Agency
> 6767, Route de l'Aéroport, Longueuil (St-Hubert), QC, Canada, J3Y 8Y9
> Tél/Tel : (450) 926-5099 | Téléc/Fax: (450) 926-5083
> Courriel/E-mail : [liang.ma at space.gc.ca]
> Site web/Web site : [www.space.gc.ca ] 
> 
> 
> 
> 
> -----Original Message-----
> From: Dejan Muhamedagic [mailto:dejanmm at fastmail.fm] 
> Sent: January 28, 2011 8:26 AM
> To: The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] pacemaker won't start mysql in the second node
> 
> Hi,
> 
> On Thu, Jan 27, 2011 at 11:51:31AM -0500, Liang.Ma at asc-csa.gc.ca wrote:
> > 
> > 
> > Hi There,
> > 
> > I have set up a pair of ha LAMP servers using heartbeat, pacemaker and
> > drbd on Ubuntu 10.04 LTS. Everything works fine until I upgraded
> > mysql-server from 5.1.41-3ubuntu12.6 to 5.1.41-3ubuntu12.9. Now node 1
> > (arsvr1) works still fine, but mysql on node 2 (arsvr2) won't start
> > when I switch arsvr1 standby. The error message shown from "crm
> > status" is
> > 
> > Failed actions:
> > mysql_start_0 (node=arsvr2, call=32, rc=4, status=complete):
> > insufficient privileges
> > 
> > No errors logged in /var/log/mysql/error.log at all.
> 
> I think that you should check directory permissions. The log
> file should give you a hint.
> 
> Thanks,
> 
> Dejan
> 
> 
> > drbd mysql partition mounted properly. If I go to
> > /usr/lib/ocf/resource.d/heartbeat and set the OCF_RESKEY parameters, I
> > have no problem to start mysql server by "./mysql start". But the
> > resource mysql won't show up in crm status.
> > 
> > So looks somehow pacemaker fail to start resource mysql even before
> > running the resource script.
> > 
> > Here is the configuration
> > 
> > node $id="bc6bf61d-6b5f-4307-85f3-bf7bb11531bb" arsvr2 \
> > 	attributes standby="off"
> > node $id="bf0e7394-9684-42b9-893b-5a9a6ecddd7e" arsvr1 \
> > 	attributes standby="off"
> > primitive apache2 lsb:apache2 \
> > 	op start interval="0" timeout="60" \
> > 	op stop interval="0" timeout="120" start-delay="15" \
> > 	meta target-role="Started"
> > primitive drbd_mysql ocf:linbit:drbd \
> > 	params drbd_resource="r0" \
> > 	op monitor interval="15s"
> > primitive drbd_webfs ocf:linbit:drbd \
> > 	params drbd_resource="r1" \
> > 	op monitor interval="15s" \
> > 	op start interval="0" timeout="240" \
> > 	op stop interval="0" timeout="100"
> > primitive fs_mysql ocf:heartbeat:Filesystem \
> > 	params device="/dev/drbd/by-res/r0" directory="/var/lib/mysql" fstype="ext4" \
> > 	op start interval="0" timeout="60" \
> > 	op stop interval="0" timeout="120" \
> > 	meta target-role="Started"
> > primitive fs_webfs ocf:heartbeat:Filesystem \
> > 	params device="/dev/drbd/by-res/r1" directory="/srv" fstype="ext4" \
> > 	op start interval="0" timeout="60" \
> > 	op stop interval="0" timeout="120" \
> > 	meta target-role="Started"
> > primitive ip1 ocf:heartbeat:IPaddr2 \
> > 	params ip="10.10.10.193" nic="eth0" \
> > 	op monitor interval="5s"
> > primitive ip1arp ocf:heartbeat:SendArp \
> > 	params ip="10.10.10.193" nic="eth0"
> > primitive mysql ocf:heartbeat:mysql \
> > 	params binary="/usr/bin/mysqld_safe" config="/etc/mysql/my.cnf"
> > user="mysql" group="mysql" log="/var/log/mysql.log"
> > pid="/var/run/mysqld/mysqld.pid" datadir="/var/lib/mysql"
> > socket="/var/run/mysqld/mysqld.sock" \
> > 	op monitor interval="30s" timeout="30s" \
> > 	op start interval="0" timeout="120" \
> > 	op stop interval="0" timeout="120" \
> > 	meta target-role="Started"
> > group MySQLDB fs_mysql mysql \
> > 	meta target-role="Started"
> > group WebServices ip1 ip1arp fs_webfs apache2 \
> > 	meta target-role="Started"
> > ms ms_drbd_mysql drbd_mysql \
> > 	meta master-max="1" master-node-max="1" clone-max="2"
> > clone-node-max="1" notify="true"
> > ms ms_drbd_webfs drbd_webfs \
> > 	meta master-max="1" master-node-max="1" clone-max="2"
> > clone-node-max="1" notify="true" target-role="Started"
> > colocation apache2_with_ip inf: apache2 ip1
> > colocation apache2_with_mysql inf: apache2 ms_drbd_mysql:Master
> > colocation apache2_with_webfs inf: apache2 ms_drbd_webfs:Master
> > colocation fs_on_drbd inf: fs_mysql ms_drbd_mysql:Master
> > colocation ip_with_ip_arp inf: ip1 ip1arp
> > colocation mysql_on_drbd inf: MySQLDB ms_drbd_mysql:Master
> > colocation web_with_mysql inf: MySQLDB WebServices
> > colocation webfs_on_drbd inf: fs_webfs ms_drbd_webfs:Master
> > colocation webfs_with_fs inf: fs_webfs fs_mysql
> > order apache2-after-arp inf: ip1arp:start apache2:start
> > order arp-after-ip inf: ip1:start ip1arp:start
> > order fs-mysql-after-drbd inf: ms_drbd_mysql:promote fs_mysql:start
> > order fs-webfs-after-drbd inf: ms_drbd_webfs:promote fs_webfs:start
> > order ip-after-mysql inf: mysql:start ip1:start
> > order mysql-after-fs-mysql inf: fs_mysql:start mysql:start
> > property $id="cib-bootstrap-options" \
> > 	dc-version="1.0.8-042548a451fce8400660f6031f4da6f0223dd5dd" \
> > 	cluster-infrastructure="Heartbeat" \
> > 	expected-quorum-votes="1" \
> > 	stonith-enabled="false" \
> > 	no-quorum-policy="ignore"
> > rsc_defaults $id="rsc-options" \
> > 	resource-stickiness="100"
> > 
> > Any help please?
> > 
> > Thanks,
> > 
> > Liang Ma
> > Contractuel | Consultant | SED Systems Inc. 
> > Ground Systems Analyst
> > Agence spatiale canadienne | Canadian Space Agency
> > 6767, Route de l'Aéroport, Longueuil (St-Hubert), QC, Canada, J3Y 8Y9
> > Tél/Tel : (450) 926-5099 | Téléc/Fax: (450) 926-5083
> > Courriel/E-mail : [liang.ma at space.gc.ca]
> > Site web/Web site : [www.space.gc.ca ] 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > 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://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> 
> _______________________________________________
> 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://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> 
> _______________________________________________
> 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://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker

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