Can I upgrade just one node of a Proxmox cluster?


New Member
Mar 3, 2023
The nodes of my Proxmox cluster are on version 7.1 of Proxmox. I would like to just upgrade one of the nodes to 8.0 and let it run for a bit to see if any unforeseen problems come up before upgrading the rest of the nodes. Would I be able to do this?
You can do staged upgrade if you wish.
Running prolonged time with a multi-version cluster is not recommended and not supported. Especially so for major release difference.

Such configurations are not tested for longevity. Certain functions will not work as expected, due to to configuration support differences. These situations are not well documented because they are not officially supported. You can find examples in the forum.
You'd be likely better off running the latest 7.x version first.

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Hello, yes, you can upgrade a single node, but there are a few things to keep in mind, for example:

- It is possible that you won't be able see the updated node in the webui of a non-updated node
- Migrating a guest from a node using a old qemu version to one using a newer version does work, but the other way around might not

among other things. As long as it is done for a well-defined testing period it is ok, but I would advice against it as a medium-term solution.


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