[Beowulf] anyone using SALT on your clusters?

Hearns, John john.hearns at mclaren.com
Tue Jul 2 01:32:59 PDT 2013



-----Original Message-----

> Our NoSQL database uses pub-sub for cluster membership, and we found
> that the hosts with screwed up RAID controllers could easily stay in
> the cluster even if they were really screwed up. We had to add some extra
> watchdogs and tests that the system disk is working.

I've seen that before with a RAID controller when one disk fails.
System pings, OS and TCP-IP stack are up, but the system disk has been marked write-only.
I'm still pretty amazed that the Linux OS soldiers on in this state.
One to watch out for!

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