Hi, I would like to upgrade my ceph cluster from hammer to infernalis. I'm reading the upgrade notes, that I need to upgrade & restart the monitors first, then the OSDs. Now, my cluster has OSDs and Mons on the same hosts (I know that should not be the case, but it is :( ). I'm just wondering: * Do the packages (Debian) restart the services upon upgrade? In theory it should work this way: * install / upgrade the new packages * restart all mons * stop OSD one by one and change the user accordingly. Another question then: Do I need to actually stop all OSDs, or can I upgrade them one by one? I don't want to take the whole cluster down :( Thanks very much, udo.
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