Re: something (qemu?) is leaking

On 23/05/2022 11:03, Michal Prívozník wrote: > On 5/23/22 11:19, lejeczek wrote: > > Hi guys. > > > > I do a simple thing which should be easy to reproduce. > > > > -> $ virt-install -n rum1 --virt-type kvm --os-variant centos8 --memory > > $((4*1024)) --disk=/VMs3/rum1.qcow2,device=disk,bus=virtio --network > > network=10_3_1,model=virtio --graphics=listen=0.0.0.0 --cpu EPYC-Rome > > --vcpus 3 --cdrom /VMs3/CentOS-Stream-9-latest-x86_64-dvd1.iso > > > > During manual setup in the VM I set 'hostname' to something and when > > installation begins and disk config stage takes place I can see - and > > later when VM(c9s) is ready can confirm - that VG name is taken from > > another VM defined/running on the host. > > I'm no LVM expert, but I always thought that installer has some defaults > built in and thus it's kind of expected if you went with defaults. > > But I'm kind of failing why is this a problem since all you're giving to > the guest is a single qcow2 disk which is not shared between two > domains. Maybe I'm misunderstanding something? I did one type there in, it should have been: ... During manual setup in the VM _if_ I _do not_ set 'hostname' to something It's a critical problem - when something leaks - the VM/guest ended up "knowing" about other VMs on the host. Those are simple defaults for disk part of the install process: When 'hostname' is set by a user then VG  gets name from installer set to eg. 'cs_hostname'. When that 'hostname' is not set then it should be just 'cs' I have a newly installed, clean VM with VG of 'cs_other-guest-on-this-host' - somehow that new VM "knew" about other guest on the host - it happened twice, two installation as with above cmd, each time with new guest's VG name of hostname of a already existing, different guest, each time different guest.