Hi all, I recently updated some of my machines to Ubuntu 22.04 from 20.04, and I noticed that some larger VMs are unable to start. As strange as it sounds, a VM successfully boots on a 2 core 2Ghz CPU, but it does not when using 16 core, same clock rate.
libvirtd logs: error from service: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: *Value specified in CPUWeight is out of range* which leads me to this forum: https://bugzilla.redhat.com/show_bug.cgi?id=1950301 that indicates that this has to do with a value in the KVM xml file. Specifically <cputune> <shares>*this value*</shares> .... </cputune> So, it seems as if Cloudstack is giving an invalid value here. According to: https://libvirt.org/formatdomain.html#:~:text=.%20Since%201.2.9-,shares,262144%5D%20using%20cgroups%20v1%2C%20%5B1%2C%2010000%5D%20using%20cgroups%20v2.%20Since%200.9.0,-period the allowed values for cputune/shares differ depending on *cgroups version:* *v1* [2, 262144] *v2* [1, 10000] I believe Ubuntu 22.04 upgrades to *cgroups v2* (or at least somewhere between 20.04 -> 22.04). Which leads me to my question, does Cloudstack in some way assume that the hosts use cgroups v1? I might have been misled somewhere when researching this issue, so any input would be greatly appreciated! Best regards, Emil Karlsson kthcloud
