DB servers are not in PCS cluster. Basically you say that i need to add them to PCS cluster and then start them? but in case if DB1 fails - DB2 autopromoted and not required start of service again>
Regarding colocation rule - i'm kind of missing logic how it works - how i can "colocate" 1 of 2 APP servers to be around a master DB ? On Tue, Mar 10, 2020 at 8:42 PM Strahil Nikolov <hunter86...@yahoo.com> wrote: > On March 10, 2020 7:31:27 PM GMT+02:00, Roman Hershkovich < > war...@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 > >to > >monitor "which DB is master". I can't use VIP (which could be sticked > >on > >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 > >failover) ? > > Hi Roman, > > 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. > > Best Regards, > Strahil Nikolov >
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