Hi,

I have setup with M/S mysql resources.
The goal is to have one IP address on MySQL master and another for slave
(if any). When there is only (one) master - slave IP should be on the
master.

My setup produces some weird effect:

When some instance of M/S MySQL fails - it is restarted
(migration-threshold=3). It's OK for now. But when this 3 restarts
doesn't help - whole M/S MySQL resource is stopped (also working
instance on another node). When on node with failed instance I issue
"crm_standby -v on", MySQL is started again (only on one, remaining node).

Some details on this setup:
5 nodes, but only 2 permitted to run MySQL (symmetric-cluster="false").
Failed instance is slave. resource-stickiness="100"

Configuration details:
primitive DevelDatabase ocf:heartbeat:mysql (...) \
  meta migration-threshold="3"
ms DevelReplDatabase DevelDatabase meta master-max="1" \
  master-node-max="1" clone-max="2" clone-node-max="1" (...)
primitive DevelDatabaseIP ocf:heartbeat:IPaddr2 (...)
primitive DevelDatabaseSlaveIP ocf:heartbeat:IPaddr2 (...)

colocation DevelDbIP-on-Db inf: DevelDatabaseIP DevelReplDatabase:Master
colocation DevelDbIP2-on-Db inf: DevelDatabaseSlaveIP DevelReplDatabase
colocation DevelDifferentDatabaseIP -1500: DevelDatabaseSlaveIP \
  DevelDatabaseIP

order Devel-ip-db-promote inf: DevelDatabaseIP:start \
  DevelReplDatabase:promote
order Devel-ip-db-slave inf: DevelDatabaseSlaveIP DevelReplDatabase

I think the problem is colocation rules for DevelDatabaseIP, but I don't
know why... Stopping DevelDatabaseIP resource "solves" the problem.

Have anyone idea, how should I achieve correct behaviour?

-- 
Best Regards,
Marek Marczykowski          |   gg:2873965      | RLU #390519
marmarek at staszic waw pl  | xmpp:marmarek at staszic waw pl


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