[ClusterLabs] Pacemake/Corosync good fit for embedded product?

[David Hunt]

Hi,

We are planning on creating a HA product in an active/standby configuration
whereby the standby unit needs to take over from the active unit very fast
(<50ms including all services restored).

We are able to do very fast signaling (say 1000Hz) between the two units to
detect failures so detecting a failure isn't really an issue.

Pacemaker looks to be a very useful piece of software for managing
resources so rather than roll our own it would make sense to reuse
pacemaker.

So my initial questions are:

   1. Do people think pacemaker is the right thing to use? Everything I
   read seem to be talking about multiple seconds for failure detection etc.
   Feature wise it looks pretty similar to what we would want.
   2. Has anyone done anything similar to this?
   3. Any pointers on where/how to add additional failure detection inputs
   to pacemaker?
   4.
   5. For a new design would you go with pacemaker+corosync,
   pacemaker+corosync+knet or something different?


Thanks

David
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