Hi all,
I remember way back in some old environment, having the HA cluster services not being started automatically at startup, ie. no entry in /etc/inittab.
I remember reason was (taken a 2 node active/passive cluster), to avoid having a backup node being booted, so that it will not automatically be able to receive RGs from the active node, in case the backup node is being booted due to some error, failure, maintenance etc. and just then a failover from the active node could happen... Maybe data loss could occure, whatever as the node could be in an undefinable state (taking a paranoid view of things).
A boot of a system, that is not being issued by an administrator but by any other reason, needs to be investigated. Before that, I would not consider the node ready to be put back into the cluster. I think it is absolutely reasonable.
Though I often see environments and several good official and good unofficial documentations on the net, that the entry in the /etc/inittab to start hacmp automatically at boot is done automatically (I didn't remember that) and there is no note on precaution to disable it of the reasons described above.
How do you handle this? Do you leave the entry in there or remark it?
What's your reason for the one or other?
Is my approach too paranoid or unrealistic?
Please share your thoughts, thanks