Question About Upgrade Qemu And Libvirtd

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Hi Team,
I am not sure if I should put my question here, I have googled long time, no explicit information found.

Background:
We need to support KVM encryption and decided to use LUKS.

Refer to:https://libvirt.org/formatsecret.html#VolumeUsageType

libvirtd and KVM should be able to support LUKS format disk directly.

Unfortunately, seems that we need to use libvirt2.2+ and qemu
2.6+, because our current qemu-kvm version does not support luks format:

And our hypervisor’s OS is CentOS 7.2 with libvirt 2.0 and qemu-kvm 1.5.3

Question:
Is there any safe way to upgrade to libvirt 2.2 and qemu 2.6?
Safe way means: do not need to reboot hyper or VM, do not impact VM types support .

Any suggestion is welcome.

Thanks.

2 thoughts on - Question About Upgrade Qemu And Libvirtd

  • The libvirt package was update to v2.0 in 7.3. In the (only supported) latest release, it’s v4.5.0. Qemu remains at version 1.5.3. Nonetheless, you won’t be able to upgrade to newer versions without shutting down or migrating the VMs.

    —
    Jonathan Billings

  • latest upstream CentOS 7.6, released at beginning of December 2018, you can update to it and then attach to Virtualization SIG and get qemu-kvm-ev, as shipped for example in RHV/oVirt. It should obsolete qemu-kvm if already installed. Try on a test system. Steps to do:

    yum-config-manager –enable extras

    Now with the command yum list CentOS-release-\*

    you will see something like:
    . . . CentOS-release-qemu-ev.noarch 1.0-4.el7.CentOS
    extras
    . . . CentOS-release-virt-common.noarch 1-1.el7.CentOS
    extras
    . . .

    and you can execute yum install CentOS-release-qemu-ev
    (that will bring in also CentOS-release-virt-common)
    Then

    yum install qemu-kvm-ev

    and it will bring in qemu-kvm-ev in version 2.12.0-18.el7_6.3.1

    More info on CentOS SIGs in general and Virtualization one in particular:
    https://wiki.CentOS.org/SpecialInterestGroup https://wiki.CentOS.org/SpecialInterestGroup/Virtualization

    HIH, Gianluca