[pgpool-general: 4702] Script / agent to attach unattached nodes
AviW at gilat.com
Mon May 23 21:08:58 JST 2016
I would like to write some kind of an agent that will check my master and slave/slaves machines and attach them to the pool if they become unattached. Is it smart to do it fully automatic or certain cases should be left to be handled manually
I will be happy to get code sample or advice as to the best way to do it.
* Should this agent run on centralized place with access to the master and slaves machines or have an agent per master / slave machines.
* Is it possible to have two machines marked as master unattached? How do I know which machine holds the latest data?
* If the agent is running locally on each machine. Do I need to check my network connectivity before becoming attached? If I have network connectivity (ping to switch) but I cannot access the other machine is it still ok to become attached (master or slave)
* Should the script also perform basebackup on old master unattached machines. What do I need to check before performing the basebackup.
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