[ClusterLabs] I want to have some resource monitored and based on that make an acton. Is it possible?
hunter86_bg at yahoo.com
Tue Mar 10 14:42:48 EDT 2020
On March 10, 2020 7:31:27 PM GMT+02:00, Roman Hershkovich <warpik at gmail.com> wrote:
>I have 2 DB servers (master/slave with replica) and 2 APP servers.
>2 APP servers managed by pacemaker (active/passive) , but i want also
>monitor "which DB is master". I can't use VIP (which could be sticked
>master DB) - it is very limited virtual environment.
>Is it possible to create a rule or some other scenario, so in case if
>master moved - pacemaker will restart APP (app does not support
If you set an order rule that starts first the master and then the app, during a failover the app will be stoped and once the master is switched (slave is promoted) the app will be started again.
Also you can consider a colocation rule that all apps are started where the master DB is running - so the lattency will be minimal.
More information about the Users