Xen 4.4 + Libvirt 1.2 Rpms Test Report With Xl/libxl On CentOS 6

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Hello,

As discussed on the last Virt SIG meeting I promised to do some libvirt + libxl testing using the latest Xen 4.4 rpms.

Versions used:

xen-libs-4.4.1-5.el6.x86_64
xen-licenses-4.4.1-5.el6.x86_64
xen-hypervisor-4.4.1-5.el6.x86_64
xen-4.4.1-5.el6.x86_64
xen-runtime-4.4.1-5.el6.x86_64

kernel-3.10.63-11.el6.CentOS.alt.x86_64

libvirt-daemon-driver-nwfilter-1.2.10-3.el6.x86_64
libvirt-daemon-driver-xen-1.2.10-3.el6.x86_64
libvirt-daemon-driver-lxc-1.2.10-3.el6.x86_64
libvirt-daemon-1.2.10-3.el6.x86_64
libvirt-daemon-config-nwfilter-1.2.10-3.el6.x86_64
libvirt-daemon-driver-libxl-1.2.10-3.el6.x86_64
libvirt-daemon-driver-secret-1.2.10-3.el6.x86_64
libvirt-python-1.2.10-2.el6.x86_64
libvirt-daemon-driver-network-1.2.10-3.el6.x86_64
libvirt-daemon-config-network-1.2.10-3.el6.x86_64
libvirt-1.2.10-3.el6.x86_64
libvirt-client-1.2.10-3.el6.x86_64
libvirt-daemon-driver-interface-1.2.10-3.el6.x86_64
libvirt-daemon-driver-nodedev-1.2.10-3.el6.x86_64
libvirt-daemon-driver-qemu-1.2.10-3.el6.x86_64
libvirt-daemon-driver-storage-1.2.10-3.el6.x86_64

python-virtinst-0.600.0-25.el6.CentOS.alt.noarch

First I verified the “baseline” setup using xm/xend and libvirt:

– Install new PV domUs using virt-install, using LVM volumes.
– Install new PV domUs using virt-install, using file images (tap2).
– Install new PV domUs using virt-manager, using LVM volumes.
– Install new PV domUs using virt-manager, using file images (tap2).

And all that worked OK with xend, as we already know. “tap2” backend was now automatically chosen for file images etc, all good.

Next I tried the same with xl/libxl. So I disabled xend with “chkconfig xend off”, rebooted the server, and after the reboot verified xend is not running anymore.

And then I did the same PV domU installation tests as above.. and to my surprise it all worked out-of-the-box !
libvirt 1.2.10 seems to be happy with libxl aswell! Both virt-install and virt-manager worked OK for me for installing new guests, and also for the basic lifecycle operations.

One difference compared to our earlier libvirt 0.x rpms is this:

# virsh version Compiled against library: libvirt 1.2.10
Using library: libvirt 1.2.10
Using API: Xen 1.2.10
Running hypervisor: Xen 4.4.0

Now I get the same output from “virsh version” for both xm/xend and xl/libxl.. Earlier it would say “Xen” or “xenlight” on the “Using API” line depending which backend it was using. I guess that has changed upstream, and both backends seem to work now anyway :)

— Pasi

3 thoughts on - Xen 4.4 + Libvirt 1.2 Rpms Test Report With Xl/libxl On CentOS 6

  • I concur that this does work. I created new machines in XL via virt-install, virt-manager, even via a CentOS-7 virt-manager connected to the xen machine.

  • Hi all,

    this is great news. So according to http://www.CentOS.org/minutes/2015/january/CentOS-devel.2015-01-13-14.06.html this means

    * Xen 4.4.1 rpms + libvirt 1.2.x (10?) have been in the repo since mid-december, and mostly there are positive things to say about it (sbonazzo, 14:09:3
    * ACTION: pasik and any other volunteer to verify Xen 4.4.1 rpms + libvirt 1.2.x + libvirt-libxl (sbonazzo, 14:16:18)
    * AGREED: people should start move off xend in 4.4 since it’s been removed in 4.5 (sbonazzo, 14:20:15)
    * ACTION: pasik to test xen 4.4 + libxl + libvirt + virt-manager amd report to virt-list (kbsingh, 14:25:39)

    == We are here ==
    * ACTION: gwd to test the upgrade path from 4.2 to 4.4 ( xen ) and report to virt-list (kbsingh, 14:27:58)

    * AGREED: on releasing xen 4.4 rpms if able to close off the libivrt / virt-manager issues on email to the list (sbonazzo, 14:32:37)

    Looks like we are close to release and may be set to do this for FOSDEM.

    Regards Lars

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