HAST and CARP

[hiroshi at soupacific.com]

HI !
> Once you are in a split-brain situation, you have to take manual steps
> to repair.
>
> Set one side as master.
>
> Then run "hastctl create" on the other box, to reset all the hast
> metadata on the devices, and initiate a new sync from the master.
>
That's I understand.
hstctl create xxx
and
hastctl -f role secondary xxx
are almost same manner.

> Ideally, any automated scripts would handle all the possible error
> conditions and checks, and prevent the systems from getting into the
> split-brain situation in the first place.  :)  (Yeah, a lot easier
> said than done.)

Other side can only know MASTER was dead, but MASTER once dead, how can 
MASTER know he is already dead ?

Conclusion is once split-brain happen, DO hastctl create xxx.

Thanks

Hiroshi