[Pacemaker] Colocation constraint to External Managed Resource

[Andreas Kurz]

On 2013-10-10 18:20, Robert H. wrote:
> Hello,
> 
> Am 10.10.2013 16:18, schrieb Andreas Kurz:
> 
>> You configured a monitor operation for this unmanaged resource?
> 
> Yes, and some parts work as expected, however some behaviour is strange.
> 
> Config (relevant part only):
> ----------------------------
> 
> primitive mysql-percona lsb:mysql \
>         op start enabled="false" interval="0" \
>         op stop enabled="false" interval="0" \
>         op monitor enabled="true" timeout="20s" interval="10s" \
>         meta migration-threshold="2" failure-timeout="30s"
> is-managed="false"
> clone CLONE-percona mysql-percona \
>         meta clone-max="2" clone-node-max="1" is-managed="false"
> location clone-percona-placement CLONE-percona \
>         rule $id="clone-percona-placement-rule" -inf: #uname ne NODE1
> and #uname ne NODE2
> colocation APP-dev2-private-percona-withip inf: IP CLONE-percona
> 
> 
> Test:
> ----
> 
> I start by both Percona XtraDB machines running:
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE2
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      mysql-percona:1    (lsb:mysql):    Started NODE2 (unmanaged)
> 
> shell# /etc/init.d/mysql stop on NODE2

Have you verified the mysql script is LSB compliant? ....
http://goo.gl/UqoHbv

Regards,
Andreas

> 
> ... Pacemaker reacts as expected ....
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE1
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      mysql-percona:1    (lsb:mysql):    Started NODE2 (unmanaged) FAILED
> 
>      .. then I wait ....
>      .. after some time (1 min), the ressource is shown as running ...
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE1
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      mysql-percona:1    (lsb:mysql):    Started NODE2 (unmanaged)
> 
> But it is definitly not running:
> 
> shell# /etc/init.d/mysql status
> MySQL (Percona XtraDB Cluster) is not running              [FEHLGESCHLAGEN]
> 
> When I run probe "crm resource reprobe" it switches to:
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE1
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      Stopped: [ mysql-percona:1 ]
> 
> Then when I start it again:
> 
> /etc/init.d/mysql start on NODE2
> 
> It stays this way:
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE1
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      Stopped: [ mysql-percona:1 ]
> 
> Only a manual "reprobe" helps:
> 
>  IP-dev2-privatevip1        (ocf::heartbeat:IPaddr2):       Started NODE1
>  Clone Set: CLONE-percona [mysql-percona] (unmanaged)
>      mysql-percona:0    (lsb:mysql):    Started NODE1 (unmanaged)
>      mysql-percona:1    (lsb:mysql):    Started NODE2 (unmanaged)
> 
> Same thing happens when I reboot NODE2 (or other way around).
> 
> ---
> 
> I would expect that crm_mon ALWAYS reflects the local state, however it
> looks like a bug for me.
> 
> Any hints whats missing ?
> 
> 
> 
>>
>> Regards,
>> Andreas
>>
> 


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