Broken cpuset.cpus cgroups in libvirt 4.5.0-23 (CentOS 7.7.1908)

Product Support
1

Hi,

Writing here just to alert the community that there is a cgroups related bug in libvirt 4.5.0-23 shipped with CentOS 7.7!

I am almost confident that this is the upstream description of the bug

An workaround is to block the upgrade of libvirt. If you’ve already upgraded (unattended upgrades, etc) here is a quick solution how to configure the old updates repository and downgrade to latest working libvirt:

cat >>/etc/yum.repos.d/updates-76.repo <<EOF
[updates-76]
name=CentOS-76 - Updates
baseurl=http://mirror.centos.org/centos/7.6.1810/updates/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
EOF
yum downgrade $(rpm -qa | grep libvirt | grep 4.5.0-23 | while read x; do echo -n "${x%4.5.0*}4.5.0-10.el7_6.12 "; done)
systemctl restart libvirtd.service

Will do my best to update the post when there is upstream fix available.

Best Regards,
Anton Todorov

2

Refactoring the workaround…

First remove the previously created file (if created)

rm -f /etc/yum.repos.d/updates-76.repo

Then to downgrade:

yum downgrade --enablerepo=C7.6.1810-updates $(rpm -qa | grep libvirt | grep 4.5.0-23 | while read x; do echo -n "${x%4.5.0*}4.5.0-10.el7_6.12 "; done) 
systemctl restart libvirtd.service

Best,
Anton Todorov