<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 3, 2017 at 8:42 PM, cmc <span dir="ltr"><<a href="mailto:iucounu@gmail.com" target="_blank">iucounu@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I have some questions about oVirt's high availability features for<br>
VMs. My understanding is that it relies on the engine host to monitor<br>
and manage the hypervisor hosts, so that in the case of a<br>
unrecoverable failure of one those hosts, it will fence the host and<br>
migrate any VM that is designated as highly available to another host<br>
in the cluster. However, if the engine is itself hosted as a VM on a<br>
host that fails, this process cannot take place, as the engine will be<br>
down and cannot initiate monitoring, fencing and migration - is that<br>
correct?<br></blockquote><div><br></div><div>The hosted-engine has its own HA mechanism.</div><div>In addition, in 4.1 we are introducing a feature which allows HA without fencing, in a similar manner to hosted-engine - by a lock on the storage side.</div><div>Y.</div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
There is the option of hosting the engine externally on dedicated<br>
hardware, or on another cluster, but then it is still a single point<br>
of failure. I recall reading about plans for an HA engine in the<br>
future though.<br>
<br>
Can someone tell me what the roadmap is? Is there a plan to put<br>
something like an HA agent on all the hypervisors in the cluster so<br>
there is no single point of failure?<br>
<br>
Thanks for any information,<br>
<br>
Cam<br>
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