[ovirt-users] Re: Major network issue with 4.4.7

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? > > > Thanks, > Andrea > > > -- > Andrea Chierici - INFN-CNAF > Viale Berti Pichat 6/2, 40127 BOLOGNA > Office Tel: +39 051 2095463 > SkypeID ataruz > -- > > _______________________________________________ > Users mailing list --users(a)ovirt.org > To unsubscribe send an email tousers-leave(a)ovirt.org > Privacy Statement:https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct:https://www.ovirt.org/community/about/community-guidelines/ > List Archives:https://lists.ovirt.org/archives/list/users@ovirt.org/message/KI... -- Andrea Chierici - INFN-CNAF Viale Berti Pichat 6/2, 40127 BOLOGNA Office Tel: +39 051 2095463 SkypeID ataruz -- _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/YPCOP3VRK6N...