RHEL8 does not ship a XEN-capable network installer anymore. This is why it is now best to simply grab the latest cloud image.
cd /root/templates/ wget https://cloud.centos.org/centos/8-stream/x86_64/images/CentOS-Stream-GenericCloud-8-20200113.0.x86_64.qcow2 ln -s CentOS-Stream-GenericCloud-8-20200113.0.x86_64.qcow2 centos.qcow2
Booting the cloud image
mkdir -p /root/guests/centos/ cd /root/guests/centos/ cp /data/templates/centos.qcow2 ./ vi centos kernel = "/data/kernels/vmlinuz" root = "/dev/xvda1 ro console=hvc0 net.ifnames=0 biosdevname=0 mitigations=off" extra = "init=/bin/bash" name = "centos" vcpus = 3 maxvcpus = 8 memory = 7168 disk = ['qcow2:/data/guests/centos8/centos.qcow2,xvda,w'] vif = [ 'bridge=br0, vifname=centos.0' ] type = "pvh"
We are not trying to enable pvgrub here, as PVH does not support it.
Get into the extra init
xl create centos -c export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin mount -t proc none /proc cat /proc/partitions mount -o remount,rw /
You should then proceed similarly to the system preparation described here but there’s a few differences. First, there are more services to disable here.
for sv in \
cloud-config \
cloud-final \
cloud-init-local \
cloud-init \
cloud-config.target \
NetworkManager \
kdump \
; do
echo disabling $sv ...
systemctl disable $sv && echo done || echo FAILED
echo
done; unset sv
You would also need to grab the necessary module for TMEM.
dhclient -v eth0 ping -c1 opendns.com yum update -y yum install network-scripts wget mlocate -y systemctl list-unit-files | grep network systemctl enable network wget https://lab.nethence.com/nunux/5.2.21.domureiser4.modules.tar.gz tar xzf 5.2.21.domureiser4.modules.tar.gz -C /lib/modules/ rm -f 5.2.21.domureiser4.modules.tar.gz echo tmem > /etc/modules-load.d/tmem.conf
The cloud image also has additional shit to get rid of
rm -f lala/etc/motd.d/cockpit rm -f lala/etc/issue.d/cockpit.issue rm -f lala/etc/sysconfig/network-scripts/ifcfg-ens3
When finished, shutdown the guest
sync halt -p
and disable the extra init.
vi centos #extra = "init=/bin/bash" extra = "ip=10.3.3.9::10.3.3.1:255.255.255.0:centos:eth0:none"
You’re now good to go for acceptance testing
xl create centos -c
Eventually make a template out of it
tar cSf /data/templates/centos.qcow2.tar centos.qcow2
Warning: since we don’t mount and edit the QCOW2 disk from the host, we also need to be careful about the SSH host keys. Those should be removed before generating the template.
https://www.centos.org/download/mirrors/
https://wiki.centos.org/action/show/Sources
https://pagure.io/centos-kernel-rpm/blob/c8/f/SOURCES/kernel-x86_64.config
https://pagure.io/centos-kernel-rpm/blob/c8/f/SOURCES
Bug 1663812 - document method to disable motd message https://bugzilla.redhat.com/show_bug.cgi?id=1663812
Is there a way to permanently remove the cockpit.socket message? https://forums.centos.org/viewtopic.php?t=72303
Strange message on ssh login https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org/thread/AQH3F2KY5RUP2RC7EDDXRTMW3AVP2DZJ/
CHAPTER 3. MANAGING KERNEL MODULES https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/managing-kernel-modules_managing-monitoring-and-updating-the-kernel
https://anaconda-installer.readthedocs.io/en/latest/boot-options.html