Re: [SLE] Looking for a book that describes highly available DHCP setups

Joachim Schrod wrote:

>>
>> Actually, that's where drbd comes in. It's essentially a RAID1 over
>> the network.
>
> Did you have failovers and they were successful?

I tested failovers in the lab and it worked fine. I didn't have any
"real" failovers as we decided there was no need for a HA DHCP setup.

> I thought that dhcpd keeps its state information in memory (at least
> partly) and that therefore drdb is not sufficient. I'm going to look
> that up, if all state is on disk Linux-HA might really be a
> possibility.

To be honest, I don't know - but I would have thought that changes in
leases are written to disk immediately. DHCP is not exactly a heavily
loaded daemon, so not much reason for buffering a lot. AFAICS, the
only state information you need is the list of currently active leases?


/Per Jessen, Zürich


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