[Pacemaker] why pacemaker does not control the resources
Andrey Groshev
greenx at yandex.ru
Thu Nov 14 06:06:04 UTC 2013
14.11.2013, 02:22, "Andrew Beekhof" <andrew at beekhof.net>:
> On 14 Nov 2013, at 6:13 am, Andrey Groshev <greenx at yandex.ru> wrote:
>
>> 13.11.2013, 03:22, "Andrew Beekhof" <andrew at beekhof.net>:
>>> On 12 Nov 2013, at 4:42 pm, Andrey Groshev <greenx at yandex.ru> wrote:
>>>> 11.11.2013, 03:44, "Andrew Beekhof" <andrew at beekhof.net>:
>>>>> On 8 Nov 2013, at 7:49 am, Andrey Groshev <greenx at yandex.ru> wrote:
>>>>>> Hi, PPL!
>>>>>> I need help. I do not understand... Why has stopped working.
>>>>>> This configuration work on other cluster, but on corosync1.
>>>>>>
>>>>>> So... cluster postgres with master/slave.
>>>>>> Classic config as in wiki.
>>>>>> I build cluster, start, he is working.
>>>>>> Next I kill postgres on Master with 6 signal, as if "disk space left"
>>>>>>
>>>>>> # pkill -6 postgres
>>>>>> # ps axuww|grep postgres
>>>>>> root 9032 0.0 0.1 103236 860 pts/0 S+ 00:37 0:00 grep postgres
>>>>>>
>>>>>> PostgreSQL die, But crm_mon shows that the master is still running.
>>>>>>
>>>>>> Last updated: Fri Nov 8 00:42:08 2013
>>>>>> Last change: Fri Nov 8 00:37:05 2013 via crm_attribute on dev-cluster2-node4
>>>>>> Stack: corosync
>>>>>> Current DC: dev-cluster2-node4 (172793107) - partition with quorum
>>>>>> Version: 1.1.10-1.el6-368c726
>>>>>> 3 Nodes configured
>>>>>> 7 Resources configured
>>>>>>
>>>>>> Node dev-cluster2-node2 (172793105): online
>>>>>> pingCheck (ocf::pacemaker:ping): Started
>>>>>> pgsql (ocf::heartbeat:pgsql): Started
>>>>>> Node dev-cluster2-node3 (172793106): online
>>>>>> pingCheck (ocf::pacemaker:ping): Started
>>>>>> pgsql (ocf::heartbeat:pgsql): Started
>>>>>> Node dev-cluster2-node4 (172793107): online
>>>>>> pgsql (ocf::heartbeat:pgsql): Master
>>>>>> pingCheck (ocf::pacemaker:ping): Started
>>>>>> VirtualIP (ocf::heartbeat:IPaddr2): Started
>>>>>>
>>>>>> Node Attributes:
>>>>>> * Node dev-cluster2-node2:
>>>>>> + default_ping_set : 100
>>>>>> + master-pgsql : -INFINITY
>>>>>> + pgsql-data-status : STREAMING|ASYNC
>>>>>> + pgsql-status : HS:async
>>>>>> * Node dev-cluster2-node3:
>>>>>> + default_ping_set : 100
>>>>>> + master-pgsql : -INFINITY
>>>>>> + pgsql-data-status : STREAMING|ASYNC
>>>>>> + pgsql-status : HS:async
>>>>>> * Node dev-cluster2-node4:
>>>>>> + default_ping_set : 100
>>>>>> + master-pgsql : 1000
>>>>>> + pgsql-data-status : LATEST
>>>>>> + pgsql-master-baseline : 0000000002000078
>>>>>> + pgsql-status : PRI
>>>>>>
>>>>>> Migration summary:
>>>>>> * Node dev-cluster2-node4:
>>>>>> * Node dev-cluster2-node2:
>>>>>> * Node dev-cluster2-node3:
>>>>>>
>>>>>> Tickets:
>>>>>>
>>>>>> CONFIG:
>>>>>> node $id="172793105" dev-cluster2-node2. \
>>>>>> attributes pgsql-data-status="STREAMING|ASYNC" standby="false"
>>>>>> node $id="172793106" dev-cluster2-node3. \
>>>>>> attributes pgsql-data-status="STREAMING|ASYNC" standby="false"
>>>>>> node $id="172793107" dev-cluster2-node4. \
>>>>>> attributes pgsql-data-status="LATEST"
>>>>>> primitive VirtualIP ocf:heartbeat:IPaddr2 \
>>>>>> params ip="10.76.157.194" \
>>>>>> op start interval="0" timeout="60s" on-fail="stop" \
>>>>>> op monitor interval="10s" timeout="60s" on-fail="restart" \
>>>>>> op stop interval="0" timeout="60s" on-fail="block"
>>>>>> primitive pgsql ocf:heartbeat:pgsql \
>>>>>> params pgctl="/usr/pgsql-9.1/bin/pg_ctl" psql="/usr/pgsql-9.1/bin/psql" pgdata="/var/lib/pgsql/9.1/data" tmpdir="/tmp/pg" start_opt="-p 5432" logfile="/var/lib/pgsql/9.1//pgstartup.log" rep_mode="async" node_list=" dev-cluster2-node2. dev-cluster2-node3. dev-cluster2-node4. " restore_command="gzip -cd /var/backup/pitr/dev-cluster2-master#5432/xlog/%f.gz > %p" primary_conninfo_opt="keepalives_idle=60 keepalives_interval=5 keepalives_count=5" master_ip="10.76.157.194" \
>>>>>> op start interval="0" timeout="60s" on-fail="restart" \
>>>>>> op monitor interval="5s" timeout="61s" on-fail="restart" \
>>>>>> op monitor interval="1s" role="Master" timeout="62s" on-fail="restart" \
>>>>>> op promote interval="0" timeout="63s" on-fail="restart" \
>>>>>> op demote interval="0" timeout="64s" on-fail="stop" \
>>>>>> op stop interval="0" timeout="65s" on-fail="block" \
>>>>>> op notify interval="0" timeout="66s"
>>>>>> primitive pingCheck ocf:pacemaker:ping \
>>>>>> params name="default_ping_set" host_list="10.76.156.1" multiplier="100" \
>>>>>> op start interval="0" timeout="60s" on-fail="restart" \
>>>>>> op monitor interval="10s" timeout="60s" on-fail="restart" \
>>>>>> op stop interval="0" timeout="60s" on-fail="ignore"
>>>>>> ms msPostgresql pgsql \
>>>>>> meta master-max="1" master-node-max="1" clone-node-max="1" notify="true" target-role="Master" clone-max="3"
>>>>>> clone clnPingCheck pingCheck \
>>>>>> meta clone-max="3"
>>>>>> location l0_DontRunPgIfNotPingGW msPostgresql \
>>>>>> rule $id="l0_DontRunPgIfNotPingGW-rule" -inf: not_defined default_ping_set or default_ping_set lt 100
>>>>>> colocation r0_StartPgIfPingGW inf: msPostgresql clnPingCheck
>>>>>> colocation r1_MastersGroup inf: VirtualIP msPostgresql:Master
>>>>>> order rsc_order-1 0: clnPingCheck msPostgresql
>>>>>> order rsc_order-2 0: msPostgresql:promote VirtualIP:start symmetrical=false
>>>>>> order rsc_order-3 0: msPostgresql:demote VirtualIP:stop symmetrical=false
>>>>>> property $id="cib-bootstrap-options" \
>>>>>> dc-version="1.1.10-1.el6-368c726" \
>>>>>> cluster-infrastructure="corosync" \
>>>>>> stonith-enabled="false" \
>>>>>> no-quorum-policy="stop"
>>>>>> rsc_defaults $id="rsc-options" \
>>>>>> resource-stickiness="INFINITY" \
>>>>>> migration-threshold="1"
>>>>>>
>>>>>> Tell me where to look - why does pacemaker not work?
>>>>> You might want to follow some of the steps at:
>>>>>
>>>>> http://blog.clusterlabs.org/blog/2013/debugging-pacemaker/
>>>>>
>>>>> under the heading "Resource-level failures".
>>>> Yes. Thank you.
>>>> I've seen this article and now I study it in more detail.
>>>> A lot of information in the logs, so it is difficult to determine where the error is, and where the consequence of error.
>>>> Now I'm trying to figure it out.
>>>>
>>>> BUT...
>>>> While I can say with certainty that the RA with monitor in the MS(pgsql) is called ONLY on the node on which the last was launched PACEMAKER.
>>> It looks like you're hitting https://github.com/beekhof/pacemaker/commit/58962338
>>> Since you appear to be on rhel6 (or a clone of rhel6), can I suggest you use the 1.1.10 packages that come with 6.4?
>>> They include the above patch.
>> I already use (builded from source two weeks ago)
>
> Upstream 1.1.10 does not include the above patch.
Strangely, in my source code, these lines exist.
Maybe I do not collect build.
I have the source - "master", and build RPM - 1.1.10.
>
>> * pacemaker 1.1.10
>> * resource-agents 3.9.5
>> * corosync 2.3.2
>> * libqb 0.16
>> & CentOS 6.4
>>
>> The same config work on pacemaker 1.1.9/corosync 1.4.5
>> Not ideal, but no such problem.
>>
>> At first idea - I thought I should move the target-role=Master from MS to primitive pgsql.
>> And so even working.
>> But after a crash killing the main PostgreSQL process - started the same.
>> Today's experiments showed that this behavior starts after I add in MS "notify=true".
>> But primitive pgsql not properly work without "notify" messages.
>> While I in frustration :(
>>> Also, just to be sure. Are you expecting monitor operations to detect when you started a resource manually?
>>> If so, you'll need a monitor operation with role=Stopped. We don't do that by default.
>> I expect that the resource monitoring on all the time, otherwise how to control them?
>
> When a node joins the cluster, we check to see if it had any resources running.
> If no-one has the resource running, we pick a node and start it there.
>
> If a malicious admin then starts the resource somewhere else, manually, we would not normally detect this.
> It is assumed that someone trusted with root privileges would not do this on purpose.
>
> However, if you do not trust your admins, as explained above, you can configure pacemaker to periodically re-check the node to detect and recover from this situation.
This individual servers allocated for development.
Their only one malicious admin - It's I.
But, I trust myself yet. :)
And even if I run something "hands" , then each time the utility deployment of cluster:
* Certainly removes all the packages that were installed prior to this (referring to the cluster (libqb, corosync1 / 2 , cman, pacemaker, resource-agents, pcs, crmsh, cluster-glue));
* Deletes all files that might remain from a previous installation ( and configs , and temp) ;
* Install my RPM's;
* Turns off and disables all of the services that may interfere with the operation of the cluster ;
* Cleared the old configuration, calculates new configs corosync and pacemaker;
* Writes and runs their cluster alternately every synchronizing each node.
In this situation it is difficult to survive something forgotten.
I reinstalled the OS would be if I had access to a level above :)
>
>> Or I do not quite understand the question.
>>>>> 'crm_mon -o' might be a good source of information too.
>>>> Therefore, I see that my resources allegedly functioning normally.
>>>>
>>>> # crm_mon -o1
>>>> Last updated: Tue Nov 12 09:27:16 2013
>>>> Last change: Tue Nov 12 00:08:35 2013 via crm_attribute on dev-cluster2-node2
>>>> Stack: corosync
>>>> Current DC: dev-cluster2-node2 (172793105) - partition with quorum
>>>> Version: 1.1.10-1.el6-368c726
>>>> 3 Nodes configured
>>>> 337 Resources configured
>>>>
>>>> Online: [ dev-cluster2-node2 dev-cluster2-node3 dev-cluster2-node4 ]
>>>>
>>>> Clone Set: clonePing [pingCheck]
>>>> Started: [ dev-cluster2-node2 dev-cluster2-node3 dev-cluster2-node4 ]
>>>> Master/Slave Set: msPgsql [pgsql]
>>>> Masters: [ dev-cluster2-node2 ]
>>>> Slaves: [ dev-cluster2-node3 dev-cluster2-node4 ]
>>>> VirtualIP (ocf::heartbeat:IPaddr2): Started dev-cluster2-node2
>>>>
>>>> Operations:
>>>> * Node dev-cluster2-node2:
>>>> pingCheck: migration-threshold=1
>>>> + (20) start: rc=0 (ok)
>>>> + (23) monitor: interval=10000ms rc=0 (ok)
>>>> pgsql: migration-threshold=1
>>>> + (41) promote: rc=0 (ok)
>>>> + (87) monitor: interval=1000ms rc=8 (master)
>>>> VirtualIP: migration-threshold=1
>>>> + (49) start: rc=0 (ok)
>>>> + (52) monitor: interval=10000ms rc=0 (ok)
>>>> * Node dev-cluster2-node3:
>>>> pingCheck: migration-threshold=1
>>>> + (20) start: rc=0 (ok)
>>>> + (23) monitor: interval=10000ms rc=0 (ok)
>>>> pgsql: migration-threshold=1
>>>> + (26) start: rc=0 (ok)
>>>> + (32) monitor: interval=10000ms rc=0 (ok)
>>>> * Node dev-cluster2-node4:
>>>> pingCheck: migration-threshold=1
>>>> + (20) start: rc=0 (ok)
>>>> + (23) monitor: interval=10000ms rc=0 (ok)
>>>> pgsql: migration-threshold=1
>>>> + (26) start: rc=0 (ok)
>>>> + (32) monitor: interval=10000ms rc=0 (ok)
>>>>
>>>> In reality now killed (signal 4|6) the PG master and the penultimate slave PG.
>>>> IMHO, even if I have something configured incorrectly, the inability to monitor the resource must cause a fatal error.
>>>> Or is there a reason not to do so?
>>>>
>>>> _______________________________________________
>>>> 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
>
> ,
> _______________________________________________
> 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
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