RHEL5 guests frequently hang when migrating host.
Hi, I am experiencing that my RHEL5 guests frequently "hang" when migrating host. Console is blank, CPU after migration is 100% and as far as oVirt is concerned, the VM is OK. oVirt is 4.2.3.8-1.el7, on CentOS 7. Hosts are CentOS 7 as well. Cluster is in "Intel Westmere family" CPU type. Guest is RHEL5, fully patched, kernel 4.2.3.8-1.el7 with ovirt-guest-agent installed from EPEL. I do not see anything out of place in the ovirt-engine and vdsm logs, and the guest logs are simply not there, the stop right before the migration,as if the machine had "frozen". Powering the VM off and starting it starts the VM correctly. This does not happen 100% of the time. If I try to migrate the VM when it is freshly started the migration is faster (maybe 5 seconds), and the guest OS does not hang. Anybody else experiencing something similar? Maybe something (timeouts?) that I should tune on the guest OS for RHEL5? Thanks! -- Eduardo Mayoral.
Hi, Yes, I've got quite the same issues with RHEL5 guests on oVirt 4.2.3 : random guest freeze and oVirt host crash while rebooting a guest ! It seems to be a kernel bug introduce with 7.5 : https://bugzilla.redhat.com/show_bug.cgi?id=1584775 https://access.redhat.com/solutions/3496461 While waiting for this kernel patch, I use an older kernel version on the oVirt host : 3.10.0-693.21.1.el7 works fine with oVirt 4.2.3 and RHEL5 guest. Regards, Arnaud Lauriou On 06/27/2018 08:59 AM, Eduardo Mayoral wrote:
Hi,
I am experiencing that my RHEL5 guests frequently "hang" when migrating host. Console is blank, CPU after migration is 100% and as far as oVirt is concerned, the VM is OK.
oVirt is 4.2.3.8-1.el7, on CentOS 7. Hosts are CentOS 7 as well. Cluster is in "Intel Westmere family" CPU type.
Guest is RHEL5, fully patched, kernel 4.2.3.8-1.el7 with ovirt-guest-agent installed from EPEL.
I do not see anything out of place in the ovirt-engine and vdsm logs, and the guest logs are simply not there, the stop right before the migration,as if the machine had "frozen".
Powering the VM off and starting it starts the VM correctly. This does not happen 100% of the time. If I try to migrate the VM when it is freshly started the migration is faster (maybe 5 seconds), and the guest OS does not hang.
Anybody else experiencing something similar? Maybe something (timeouts?) that I should tune on the guest OS for RHEL5?
Thanks!
--
Eduardo Mayoral.
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Yes, this looks definitely like it. Thank you very much! On 27/06/18 10:51, Arnaud Lauriou wrote:
Hi,
Yes, I've got quite the same issues with RHEL5 guests on oVirt 4.2.3 : random guest freeze and oVirt host crash while rebooting a guest ! It seems to be a kernel bug introduce with 7.5 : https://bugzilla.redhat.com/show_bug.cgi?id=1584775
https://access.redhat.com/solutions/3496461
While waiting for this kernel patch, I use an older kernel version on the oVirt host : 3.10.0-693.21.1.el7 works fine with oVirt 4.2.3 and RHEL5 guest.
Regards,
Arnaud Lauriou
On 06/27/2018 08:59 AM, Eduardo Mayoral wrote:
Hi,
I am experiencing that my RHEL5 guests frequently "hang" when migrating host. Console is blank, CPU after migration is 100% and as far as oVirt is concerned, the VM is OK.
oVirt is 4.2.3.8-1.el7, on CentOS 7. Hosts are CentOS 7 as well. Cluster is in "Intel Westmere family" CPU type.
Guest is RHEL5, fully patched, kernel 4.2.3.8-1.el7 with ovirt-guest-agent installed from EPEL.
I do not see anything out of place in the ovirt-engine and vdsm logs, and the guest logs are simply not there, the stop right before the migration,as if the machine had "frozen".
Powering the VM off and starting it starts the VM correctly. This does not happen 100% of the time. If I try to migrate the VM when it is freshly started the migration is faster (maybe 5 seconds), and the guest OS does not hang.
Anybody else experiencing something similar? Maybe something (timeouts?) that I should tune on the guest OS for RHEL5?
Thanks!
--
Eduardo Mayoral.
_______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/42D5IQBRX7ABZF...
Hi, I had similiar experience with some vms (really small amount of them). It hangs, cpu was 100%, console inresponsible and powering that vm off and on solves problem. But one of this vms was CentOS6, not 5 (in the fact it was our mirror.slu.cz which mirrors also ovirt project so sorry for unplanned outages ;-) I am not sure if it is tied to migrations, I had this experience even without migrating this vm (as long as it was not migrated automatically) This didn't happen after I upgraded hosts to CentOS7.5.1804 (I am always using the latest oVirt in time here) Cpu familly is AMD Opteron(tm) Processor 6172 (yes, it is a little bit older cluster :-) Cheers, Jiri Slezka On 06/27/2018 08:59 AM, Eduardo Mayoral wrote:
Hi,
I am experiencing that my RHEL5 guests frequently "hang" when migrating host. Console is blank, CPU after migration is 100% and as far as oVirt is concerned, the VM is OK.
oVirt is 4.2.3.8-1.el7, on CentOS 7. Hosts are CentOS 7 as well. Cluster is in "Intel Westmere family" CPU type.
Guest is RHEL5, fully patched, kernel 4.2.3.8-1.el7 with ovirt-guest-agent installed from EPEL.
I do not see anything out of place in the ovirt-engine and vdsm logs, and the guest logs are simply not there, the stop right before the migration,as if the machine had "frozen".
Powering the VM off and starting it starts the VM correctly. This does not happen 100% of the time. If I try to migrate the VM when it is freshly started the migration is faster (maybe 5 seconds), and the guest OS does not hang.
Anybody else experiencing something similar? Maybe something (timeouts?) that I should tune on the guest OS for RHEL5?
Thanks!
--
Eduardo Mayoral.
_______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/42D5IQBRX7ABZF...
participants (3)
-
Arnaud Lauriou -
Eduardo Mayoral -
Jiří Sléžka