[Pacemaker] MySQL HA with pacemaker and DRBD - How to monitor mysql service

emmanuel segura emi2fast at gmail.com
Thu Mar 22 14:29:52 UTC 2012


put migration-thresold global in your cluster property

Il giorno 22 marzo 2012 15:23, coma <coma.inf at gmail.com> ha scritto:

> 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
>
>
>
> 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>
>
>>  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>>
>> >
>> >     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>> 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>> 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"
>> >
>> >
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>> >
>> >
>> >
>> >
>> >         --
>> >         esta es mi vida e me la vivo hasta que dios quiera
>> >
>> >
>> >
>> >
>> >     --
>> >     esta es mi vida e me la vivo hasta que dios quiera
>> >
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>> >
>> >
>> >
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>>
>>
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>>
>
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