hello,
i come across many postings of people who seem to run their proxmox "cluster" in a "non HA" dual node setup without quorum, for easier manageability of 2 nodes.
i'm trying to explain that this is the wrong way to proceed, but after a lot of search , i did not really find satisfying and good explanations what's exactly bad on this an what can exactly go wrong , so that you may screw your nodes.
imho, at least with "inter node network failure" we have split brain between 2 instaces of pmxcfs.
i wonder how that behaves on reconnect of the network or how they can get out of sync so they won't "re-join". and i have to admit, that i'm not deep enough into the clustering details, so that i cannot answer this on my own.
i'd be happy if somebody could better describe the failure scenarios and consequences (or point me to some description) .
it's always good to learn about the details , and with that to be able to better convince newbies NOT to do that - or at least make them more sensible on what can go wrong and what needs to be done to fix it.
it's that "it works for me - so what?" which i dislike so much....
thank you!
i come across many postings of people who seem to run their proxmox "cluster" in a "non HA" dual node setup without quorum, for easier manageability of 2 nodes.
i'm trying to explain that this is the wrong way to proceed, but after a lot of search , i did not really find satisfying and good explanations what's exactly bad on this an what can exactly go wrong , so that you may screw your nodes.
imho, at least with "inter node network failure" we have split brain between 2 instaces of pmxcfs.
i wonder how that behaves on reconnect of the network or how they can get out of sync so they won't "re-join". and i have to admit, that i'm not deep enough into the clustering details, so that i cannot answer this on my own.
i'd be happy if somebody could better describe the failure scenarios and consequences (or point me to some description) .
it's always good to learn about the details , and with that to be able to better convince newbies NOT to do that - or at least make them more sensible on what can go wrong and what needs to be done to fix it.
it's that "it works for me - so what?" which i dislike so much....
thank you!
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