HA not working 3.4.2
Hi i was testing HA of ovirt,(i am from Xenserver background and trying to use KVM solution in our environment) Have 2 hosts with NFS storage and i tested migration between these two hosts. On Host2 while VM was running on it, i unplugged Power cable and it took long minutes to update that VM is down,okkk now long wait...... .. ..... ....... VM state changed to *unkown *and not booted on second Node ie Host1 its been half an hour and still the VM is not restarted What can be the issue?What should i do it make the VM in real HA so that it will be restarted on the active node. *How HA is enabled* what i did was while creating vm> Advanced option>High Availability>Highly Available I am sure this can be a configuration error,Can some one please help me with enabling HA. Please Help Thanks
Hi, ----- Original Message -----
Hi i was testing HA of ovirt,(i am from Xenserver background and trying to use KVM solution in our environment)
Have 2 hosts with NFS storage and i tested migration between these two hosts.
On Host2 while VM was running on it, i unplugged Power cable and it took long minutes to update that VM is down,okkk now long wait...... .. ..... .......
VM state changed to unkown and not booted on second Node ie Host1
its been half an hour and still the VM is not restarted
What can be the issue?What should i do it make the VM in real HA so that it will be restarted on the active node.
We don't restart the VM in that case on purpose, since we really don't know what's the status of the VM - the host might have been just disconnected from the network while the VM is still running (and connected to the storage), so if we'll also run the VM on a different host, we'll get "split-brain". In order to restart HA VMs which were running on host that went down, you either needs to have power-management defined for that host (for automatic restart) or to trigger it manually by selecting "confirm host has been rebooted" when the host is changed to non-responsive state (and you need to have additional host which is up of course).
How HA is enabled what i did was while creating vm> Advanced option>High Availability>Highly Available
I am sure this can be a configuration error,Can some one please help me with enabling HA.
Please Help
Thanks
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Thanks Arik, I think that's the issue,i havent configured any power management but could you tell me what to specify in power management i see Address,Username,Password,SSH port and Type. Using HP server with ILO2 so i filled Type as ILO2 but its confusing what these * Address,Username,Password *are are these ILO credentials or My hypervisor credentials Thanks On Mon, Jun 23, 2014 at 11:50 AM, Arik Hadas <ahadas@redhat.com> wrote:
Hi,
----- Original Message -----
Hi i was testing HA of ovirt,(i am from Xenserver background and trying to use KVM solution in our environment)
Have 2 hosts with NFS storage and i tested migration between these two hosts.
On Host2 while VM was running on it, i unplugged Power cable and it took long minutes to update that VM is down,okkk now long wait...... .. ..... .......
VM state changed to unkown and not booted on second Node ie Host1
its been half an hour and still the VM is not restarted
What can be the issue?What should i do it make the VM in real HA so that it will be restarted on the active node.
We don't restart the VM in that case on purpose, since we really don't know what's the status of the VM - the host might have been just disconnected from the network while the VM is still running (and connected to the storage), so if we'll also run the VM on a different host, we'll get "split-brain".
In order to restart HA VMs which were running on host that went down, you either needs to have power-management defined for that host (for automatic restart) or to trigger it manually by selecting "confirm host has been rebooted" when the host is changed to non-responsive state (and you need to have additional host which is up of course).
How HA is enabled what i did was while creating vm> Advanced option>High
Availability>Highly
Available
I am sure this can be a configuration error,Can some one please help me with enabling HA.
Please Help
Thanks
_______________________________________________ Devel mailing list Devel@ovirt.org http://lists.ovirt.org/mailman/listinfo/devel
participants (2)
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Arik Hadas -
mad Engineer