Can anyone please help? I have really no clue on this issue.
Thanks,
Andrea
On 06/08/2021 11:20, Andrea Chierici
wrote:
Dear all,
I've been using ovirt for at least 6 years and only lately I've
stepped into a weird problem that I hope someone will be able to
give help.
My hardware is:
- blade lenovo for hosts, with dual switch
- dell equallogic for iscsi storage, directly connected to the
blade switches
- The two host network cards are configured with bonding and all
the vlans are accessed from it (mtu 9000)
- all the hosts and ovirt engine have firewalld service disabled)
My engine is hosted on a separate vmware vm (I will evaluate the
self hosted engine later...). I want to stress the fact that for
years this setup worked smoothly without any significant issue
(and all the minor updates were completed flawlessly).
A few weeks ago I started the update from the rock solid 4.3 to
the latest 4.4.7. I began with the manager, following the docs,
installing a new centos8 vm and importing the backup: everything
went smootly and I was able to get access to the manager without
any problem, all the machines still there :)
I then began updating the hosts, from centos7 to centos8 stream,
one by one.
Immediately I noticed network issues, with the VMs hosted on the
first updated host. Migrating VMs from centos8 host to other
centos8 quite often fails, but the main issue is this: if I
start one of the VMs on the centos8 host, they have no network
connectivity. If I migrate them to a centos7 hosts the network
starts to work, and if I migrate the VMs back to the centos8
host, the network keeps working.
I am puzzled and can't understand what's going on. Generally
speaking all the centos8 hosts (I have 6 in my cluster, and now 3
are centos8 while the rest is still centos7) seem to be very
unstable, meaning that the VMs they host are quite often showing
network issues and temporary glitches.
Can someone give a hint on how to solve this weird issue?
