On Wed, Jul 14, 2021 at 10:10:35AM +0200, arjen-libvirt(a)gugu.be wrote:
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?
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
Regards,
Daniel
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