You could have 2 "heartbeat servers" on the private network (Old
workstations would do, 386 anyone?) and have these maintain state
information by pinging the servers etc...
When the servers come up, they query both the heartbeat servers ( which
may also have a connection to the public net and run scripts to test if
the services are up) and then become master or slave as appropriate...
This way, if the service dies, the heartbeat servers know... but if a
machine comes up with it's private NIC failed, it cannot talk to the
heartbeat servers so it doesn't do anything except SCREAM!
Just an idea,
I wonder if there is a Linux HA mailing list as this isn't really a raid
issue..... If anyone knows of an HA mailing list I'd be very interested
and I guess the sender would too!
James
On Fri, 19 Mar 1999, Wim Fournier wrote:
> Hi all,
>
> I'm working on linux HA. At the moment I've got something like this:
>
> ---------------------------------------
> | | Public net
> [ # 1 ] [ # 2 ]
> | | Private net
> ---------------------------------------
>
> Let's descibe it:
> I've got 2 hosts with each 2 network card's. One for the pivate net (heartbeat) and
>one for the public net (where the service comes out). One host is master, the other
>backup. When a server comes up, it checks whether to see if there's already a host
>active (this must be the master), when this is not the case, it go's backup. The
>method I use to see if there's antoher host is that I try to ping it or whatever.
>Problem is: How do I know that is isn't my own networkcard that is broken, in that
>case I don't want the machine to anything further (like shutting the other one off
>because it can't reach it).
>
> SO, my dear freaks... Does anyone know a solution for this nice heavy problem??
>
> Please mail directly to [EMAIL PROTECTED] because my procmail saves all data from
>linux-raid to an file...
>
> Tnkz + Grtz
>
> Wim Fournier
>
> Unix Support Netherlands, a PSINet company
>
James ([EMAIL PROTECTED])
Vortex Internet
My operating system unders~1 long filena~1, and yours?
