David McDowell wrote:
One in the same? Here's my idea. I'd like to use CentOS 4 if
possible to do this. I would like to have my webserver mirrored on
another machine so that if one goes down, the site continues to run. If I change a config on one machine, the config should change on the
mirrored machine. Is this running a cluster or is this some other
kind of setup? Basically I have some time at work to play. Any good
resources for this kind of information? Basically I want 2 servers to
be identical mirrors of one another so that if one of the 2 goes down,
I'm still online. And, if I repair the broken one, it can resync
itself so that the mirror of the 2 machines is identical again. Suggestions, links, etc?
Since CentOS 4 is, despite what RHAT's lawyers say, technically pretty much RHEL 4, you can follow the admin docs for RHEL 4 to see how clustering works in there. The way we're doing it at $WORK requires access to a LUN on a SAN that is unmasked to both servers, though, so I'm not quite sure how you would pull it off without some sort of shared external SCSI or SAN storage.
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