On Tuesday, 2 February 2021 11:37:01 CET Andrea Chierici wrote: > Hi, > I am trying to configure high availability on a critical VM. My ovirt > version is 4.3.10.4-1.el7. > My question is about the best settings to specify, since it's not > completely clear to me how they influence the availability. > > What I want is simply to have a specific machine ALWAYS running, or at > least, to be available as much as possible. I have no special > requirements on the VM, if it goes down, simply restarting it is fine. > > Here is my current setting. Is it good or I'd better chage anything?
you may want to configure VM lease. If you don't do so, in case of split brain, there can be two VMs running and accessing the same storage, leading to the data corruption. With VM leases this cannot happen - only one VM can access the storage. To speed up the switch, you may want to configure also watchdog. But there can be use cases (e.g. stateless server which just forwards received packet somewhere) where leases are not needed or not using them won't cause any harm. See [1] for more details. [1] https://www.ovirt.org/develop/ha-vms.html > > > Thanks, > Andrea
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