[Pacemaker] MySQL HA with pacemaker and DRBD - How to monitor mysql service
emmanuel segura
emi2fast at gmail.com
Fri Mar 23 09:02:03 EDT 2012
The first thing you can do it's eliminate this "location
master-prefer-node-1 Cluster-VIP 25: node1"
because you have your virtual in group and i would like to see the log from
the second node
Thanks :-)
Il giorno 23 marzo 2012 13:42, coma <coma.inf at gmail.com> ha scritto:
> Thank you for your responses,
>
> i have fixed my migration-treshold problem with lsb:mysqld ressource (i
> can see migration-threshold=2 with crm_mon failcounts so its ok) bu
> failover still doesn't work when mysql fail (but work fine when node fail
> or standby).
> So i've tried with the ocf ressource agent, it's work fine on my first
> node but fail on my second node with unknown error.
>
> crm_mon --failcount:
>
> Failed actions:
> mysqld_monitor_0 (node=node2, call=6, rc=1, status=complete): unknown
> error
> mysqld_stop_0 (node=node2, call=7, rc=1, status=complete): unknown
> error
>
>
> I have exactly the same mysql packages version and configuration on my two
> nodes (with proper permissions), also corosync/heartbeat and pacemaker are
> in the same version too:
>
> corosynclib-1.2.7-1.1.el5
> corosync-1.2.7-1.1.el5
> pacemaker-libs-1.1.5-1.1.el5
> pacemaker-1.1.5-1.1.el5
> heartbeat-3.0.3-2.3.el5
> heartbeat-libs-3.0.3-2.3.el5
> heartbeat-debuginfo-3.0.2-2.el5
>
> So i don't andersand wy it's works on one node but not on the second?
>
>
> ressource config:
>
> primitive mysqld ocf:heartbeat:mysql \
> params binary="/usr/bin/mysqld_safe" config="/etc/my.cnf" \
> user="mysql" group="mysql" pid="/var/run/mysqld/mysqld.pid" \
> datadir="/data/mysql/databases" socket="/var/lib/mysql/mysql.sock"
> \
> op start interval="0" timeout="120" \
> op stop interval="0" timeout="120" \
> op monitor interval="30" timeout="30" depth="0" \
> target-role="Started"
>
>
> And same with (i have created test database / table + grant test user on
> it):
>
> primitive mysqld ocf:heartbeat:mysql \
> params binary="/usr/bin/mysqld_safe" config="/etc/my.cnf" \
> datadir="/data/mysql/databases" user="mysql" \
> pid="/var/run/mysqld/mysqld.pid"
> socket="/var/lib/mysql/mysql.sock" \
> test_passwd="test" test_table="Cluster.dbcheck" test_user="test" \
> op start interval="0" timeout="120" \
> op stop interval="0" timeout="120" \
> op monitor interval="30s" timeout="30s" OCF_CHECK_LEVEL="1" \
> meta migration-threshold="3" target-role="Started"
>
>
> Full config:
>
> node node2 \
> attributes standby="off"
> node node1 \
> attributes standby="off"
> primitive Cluster-VIP ocf:heartbeat:IPaddr2 \
> params ip="x.x.x.x" broadcast="x.x.x.x" nic="eth0"
> cidr_netmask="21" iflabel="VIP1" \
> op monitor interval="10s" timeout="20s" \
> meta is-managed="true"
> primitive datavg ocf:heartbeat:LVM \
> params volgrpname="datavg" exclusive="true" \
> op start interval="0" timeout="30" \
> op stop interval="0" timeout="30"
> primitive drbd_mysql ocf:linbit:drbd \
> params drbd_resource="drbd-mysql" \
> op monitor interval="15s"
> primitive fs_mysql ocf:heartbeat:Filesystem \
> params device="/dev/datavg/data" directory="/data" fstype="ext3"
> primitive mysqld ocf:heartbeat:mysql \
> params binary="/usr/bin/mysqld_safe" config="/etc/my.cnf"
> user="mysql" group="mysql" pid="/var/run/mysqld/mysqld.pid"
> datadir="/data/mysql/databases" socket="/var/lib/mysql/mysql.sock" \
> op start interval="0" timeout="120" \
> op stop interval="0" timeout="120" \
> op monitor interval="30" timeout="30" depth="0"
> group mysql datavg fs_mysql Cluster-VIP mysqld
> ms ms_drbd_mysql drbd_mysql \
> meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
> location master-prefer-node-1 Cluster-VIP 25: node1
> colocation mysql_on_drbd inf: mysql ms_drbd_mysql:Master
> order mysql_after_drbd inf: ms_drbd_mysql:promote mysql:start
> property $id="cib-bootstrap-options" \
>
> dc-version="1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f" \
> cluster-infrastructure="openais" \
> expected-quorum-votes="2" \
> stonith-enabled="false" \
> no-quorum-policy="ignore" \
> last-lrm-refresh="1332504626"
> rsc_defaults $id="rsc-options" \
> resource-stickiness="100"
>
>
>
>
>
> 2012/3/22 Andreas Kurz <andreas at hastexo.com>
>
>> On 03/22/2012 03:23 PM, coma wrote:
>> > Thank you for your responses,
>> >
>> > I have added the migration-treshold on my mysqld ressource, when i kill
>> > or manually stop mysql on one node, there is not failover on the second
>> > node.
>> > Also, when i look crm_mon --failcounts, i can see "mysqld:
>> > migration-threshold=1000000 fail-count=1000000", so i don"t anderstand
>> > why migration-threshold not equal 2?
>> >
>> > Migration summary:
>> > * Node node1:
>> > mysqld: migration-threshold=1000000 fail-count=1000000
>> > * Node node2:
>> >
>> > Failed actions:
>> > mysqld_monitor_10000 (node=node1, call=90, rc=7, status=complete):
>> > not running
>> > mysqld_stop_0 (node=node1, call=93, rc=1, status=complete): unknown
>> > error
>>
>> The lsb init script you are using seems to be not LSB compliant ...
>> looks like it returns an error on stopping an already stopped mysql.
>>
>>
>> http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html-single/Pacemaker_Explained/index.html#ap-lsb
>>
>> Fix the script ... or better use the ocf resource agent.
>>
>> Regards,
>> Andreas
>>
>> --
>> Need help with Pacemaker?
>> http://www.hastexo.com/now
>>
>> >
>> >
>> >
>> > configuration:
>> >
>> > node node1 \
>> > attributes standby="off"
>> > node node2 \
>> > attributes standby="off"
>> > primitive Cluster-VIP ocf:heartbeat:IPaddr2 \
>> > params ip="x.x.x.x" broadcast="x.x.x.x" nic="eth0"
>> > cidr_netmask="21" iflabel="VIP1" \
>> > op monitor interval="10s" timeout="20s" \
>> > meta is-managed="true"
>> > primitive datavg ocf:heartbeat:LVM \
>> > params volgrpname="datavg" exclusive="true" \
>> > op start interval="0" timeout="30" \
>> > op stop interval="0" timeout="30"
>> > primitive drbd_mysql ocf:linbit:drbd \
>> > params drbd_resource="drbd-mysql" \
>> > op monitor interval="15s"
>> > primitive fs_mysql ocf:heartbeat:Filesystem \
>> > params device="/dev/datavg/data" directory="/data" fstype="ext3"
>> > primitive mysqld lsb:mysqld \
>> > op monitor interval="10s" timeout="30s" \
>> > op start interval="0" timeout="120" \
>> > op stop interval="0" timeout="120" \
>> > meta target-role="Started" migration-threshold="2"
>> > failure-timeout="20s"
>> > group mysql datavg fs_mysql Cluster-VIP mysqld
>> > ms ms_drbd_mysql drbd_mysql \
>> > meta master-max="1" master-node-max="1" clone-max="2"
>> > clone-node-max="1" notify="true"
>> > location master-prefer-node-1 Cluster-VIP 25: node1
>> > colocation mysql_on_drbd inf: mysql ms_drbd_mysql:Master
>> > order mysql_after_drbd inf: ms_drbd_mysql:promote mysql:start
>> > property $id="cib-bootstrap-options" \
>> >
>> > dc-version="1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f" \
>> > cluster-infrastructure="openais" \
>> > expected-quorum-votes="2" \
>> > stonith-enabled="false" \
>> > no-quorum-policy="ignore" \
>> > last-lrm-refresh="1332425337"
>> > rsc_defaults $id="rsc-options" \
>> > resource-stickiness="100"
>> >
>> >
>> >
>> > 2012/3/22 Andreas Kurz <andreas at hastexo.com <mailto:andreas at hastexo.com
>> >>
>> >
>> > On 03/22/2012 01:51 PM, coma wrote:
>> > > Ah yes thank you, the service status mysql is now monitored, but
>> the
>> > > failover is not performed?
>> >
>> > As long as local restarts are successful there is no need for a
>> failover
>> > ... there is migration-treshold to limit local restart tries.
>> >
>> > Regards,
>> > Andreas
>> >
>> > --
>> > Need help with Pacemaker?
>> > http://www.hastexo.com/now
>> >
>> > >
>> > >
>> > >
>> > > 2012/3/22 emmanuel segura <emi2fast at gmail.com
>> > <mailto:emi2fast at gmail.com> <mailto:emi2fast at gmail.com
>> > <mailto:emi2fast at gmail.com>>>
>> > >
>> > > sorry
>> > > I think you missed the op monitor operetion in your primitive
>> > definition
>> > >
>> > >
>> > >
>> > > Il giorno 22 marzo 2012 11:52, emmanuel segura
>> > <emi2fast at gmail.com <mailto:emi2fast at gmail.com>
>> > > <mailto:emi2fast at gmail.com <mailto:emi2fast at gmail.com>>> ha
>> > scritto:
>> > >
>> > > I think you missed the op monitor operetion you primitive
>> > definition
>> > >
>> > > Il giorno 22 marzo 2012 11:33, coma <coma.inf at gmail.com
>> > <mailto:coma.inf at gmail.com>
>> > > <mailto:coma.inf at gmail.com <mailto:coma.inf at gmail.com>>>
>> > ha scritto:
>> > >
>> > > Hello,
>> > >
>> > > I have a question about mysql service monitoring into
>> a
>> > > MySQL HA cluster with pacemaker and DRBD,
>> > > I have set up a configuration to allow a failover
>> between
>> > > two nodes, it work fine when a node is offline (or
>> > standby),
>> > > but i want to know if it is possible to monitor the
>> mysql
>> > > service to perform a failover if mysql is stopped or
>> > > unavailable?
>> > >
>> > > Thank you in advance for any response.
>> > >
>> > > My crm configuration:
>> > >
>> > > node node1 \
>> > > attributes standby="off"
>> > > node node2 \
>> > > attributes standby="off"
>> > > primitive Cluster-VIP ocf:heartbeat:IPaddr2 \
>> > > params ip="x.x.x.x" broadcast="x.x.x.x"
>> nic="eth0"
>> > > cidr_netmask="21" iflabel="VIP1" \
>> > > op monitor interval="10s" timeout="20s" \
>> > > meta is-managed="true"
>> > > primitive datavg ocf:heartbeat:LVM \
>> > > params volgrpname="datavg" exclusive="true" \
>> > > op start interval="0" timeout="30" \
>> > > op stop interval="0" timeout="30"
>> > > primitive drbd_mysql ocf:linbit:drbd \
>> > > params drbd_resource="drbd-mysql" \
>> > > op monitor interval="15s"
>> > > primitive fs_mysql ocf:heartbeat:Filesystem \
>> > > params device="/dev/datavg/data"
>> directory="/data"
>> > > fstype="ext3"
>> > > primitive mysqld lsb:mysqld
>> > > group mysql datavg fs_mysql Cluster-VIP mysqld
>> > > ms ms_drbd_mysql drbd_mysql \
>> > > meta master-max="1" master-node-max="1"
>> > > clone-max="2" clone-node-max="1" notify="true"
>> > > location master-prefer-node-1 Cluster-VIP 25: node1
>> > > colocation mysql_on_drbd inf: mysql
>> ms_drbd_mysql:Master
>> > > order mysql_after_drbd inf: ms_drbd_mysql:promote
>> > mysql:start
>> > > property $id="cib-bootstrap-options" \
>> > >
>> > >
>> > dc-version="1.1.5-1.1.el5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f"
>> > > \
>> > > cluster-infrastructure="openais" \
>> > > expected-quorum-votes="2" \
>> > > stonith-enabled="false" \
>> > > no-quorum-policy="ignore" \
>> > > last-lrm-refresh="1332254494"
>> > > rsc_defaults $id="rsc-options" \
>> > > resource-stickiness="100"
>> > >
>> > >
>> > > _______________________________________________
>> > > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> > <mailto:Pacemaker at oss.clusterlabs.org>
>> > > <mailto:Pacemaker at oss.clusterlabs.org
>> > <mailto: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
>> > >
>> > >
>> > >
>> > >
>> > > --
>> > > esta es mi vida e me la vivo hasta que dios quiera
>> > >
>> > >
>> > >
>> > >
>> > > --
>> > > esta es mi vida e me la vivo hasta que dios quiera
>> > >
>> > > _______________________________________________
>> > > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> > <mailto:Pacemaker at oss.clusterlabs.org>
>> > > <mailto:Pacemaker at oss.clusterlabs.org
>> > <mailto: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
>> > >
>> > >
>> > >
>> > >
>> > > _______________________________________________
>> > > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> > <mailto: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
>> >
>> >
>> >
>> > _______________________________________________
>> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> > <mailto: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
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > 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
>>
>>
>>
>> _______________________________________________
>> 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
>>
>>
>
> _______________________________________________
> 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
>
>
--
esta es mi vida e me la vivo hasta que dios quiera
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