virsh qemu-monitor-command block_resize not working
Hi List, some version info: ]# /usr/libexec/qemu-kvm -version QEMU emulator version 4.2.0 (qemu-kvm-4.2.0-48.module+el8.4.0+534+4680a14e) Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers ]# virsh version Compiled against library: libvirt 6.0.0 Using library: libvirt 6.0.0 Using API: QEMU 6.0.0 Running hypervisor: QEMU 4.2.0 information about block devices for one specific guest: ]# virsh qemu-monitor-command uat-win201202.uat.gugu.be --hmp info block libvirt-2-format: /data/kvm/storage/diskimages01/uat-win201202_disk1_C.qcow2 (qcow2) Attached to: /machine/peripheral/virtio-disk0/virtio-backend Cache mode: writeback ide0-0-0: [not inserted] Attached to: ide0-0-0 Removable device: not locked, tray closed But then, when I want to resize the block device, I just cannot seem to find the correct device. I tried all of these: virsh qemu-monitor-command uat-win201202.uat.gugu.be --hmp block_resize libvirt-2-storage 48G Error: Cannot find device=libvirt-2-storage nor node_name= virsh qemu-monitor-command uat-win201202.uat.gugu.be --hmp block_resize drive-libvirt-2-storage 48G Error: Cannot find device=drive-libvirt-2-storage nor node_name= virsh qemu-monitor-command uat-win201202.uat.gugu.be --hmp block_resize virtio-disk0 48G Error: Cannot find device=virtio-disk0 nor node_name= virsh qemu-monitor-command uat-win201202.uat.gugu.be --hmp block_resize drive-virtio-disk0 48G Error: Cannot find device=drive-virtio-disk0 nor node_name= In a previous qemu version this worked (EL 7). Can someone help me out? Best regards, Arjen Van Drie, Antwerp
Re: virsh qemu-monitor-command block_resize not working
On Wed, 14 Jul 2021 09:34:22 +0100 Daniel P. Berrangé wrote: > On Wed, Jul 14, 2021 at 10:10:35AM +0200, arjen-libv...@gugu.be wrote: > > Hi List, > > [sNap] > > > > In a previous qemu version this worked (EL 7). Can someone help me > > out? > > Libvirt has changed the way it configures disks with QEMU to use the > modern -blockdev argument. I expect this impacts your usage, but I > dont know what the correct naming should be. > > Ignoring that though, why are you even using qemu-monitor-command in > the first place ? Libvirt directly supports live block resizing > via the 'virsh blockresize' command Hah, didn't know that live resizing was implemented in virsh. Great! Thanks, Arjen.
