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Keepalived (lemmy.ml)

submitted 2 years ago by g7s@lemmy.ml to c/selfhost@lemmy.ml

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I am currently looking into High Availability for my work setup. I am having some problems understanding how to achive that. I have two servers, one running libvirt and a couple VM, the other one nothing much yet.

To achieve HA with keepalived, I would have to setup the exact same VMs under the second server, right? If that's the case, how would I make sure that the "mirrors" stay equal, If for example the master goes down, the backup takes over, some changes are made in a DB and the master knows nothing about these changes.

Maybe I misunderstood keepalived so far, can somebody provide me with an example setup or hints on how to achieve what I want to do?

Kind Regards

g7s

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[–] g7s@lemmy.ml 1 points 2 years ago

Thank you for the explanation. I might look into heartbeat, as suggested by @arbiter. I understand now, that keepalived is only working on an IP layer, and not helping me with mirroring my actual VM's. For that I will look into other technologies.