Same thing, the engine in this case is "self-hosted", as in, it runs in a VM hosted on the cluster that it is managing.  I am a beginner here, but from my understanding, each node is always checking on the health of the engine VM.  If the engine is missing (ie, the host running it has gone down), then another available, healthy host will spawn up the engine and you will regain access. 

In my experience this has worked very reliably.  I have 2 hosts, both are "able" to run the engine VM.  If I take one host down, I am not able to load the engine GUI.  But if I wait a few minutes, then I regain access, and see that the engine is now running on the remaining healthy host. 

Vincent Royer

778-825-1057

SUSTAINABLE MOBILE ENERGY SOLUTIONS

On Mon, Apr 2, 2018 at 6:07 PM, <dhy336@sina.com> wrote:

what different between self-hosted engine and  hosted engine? I find a project 

ovirt-hosted-engine-ha  https://github.com/oVirt/ovirt-hosted-engine-ha  

----- 原始邮件 -----
发件人：Vincent Royer <vincent@epicenergy.ca>
收件人：dhy336@sina.com
抄送人：users <users@ovirt.org>
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月03日 08点57分

If your node running self-hosted engine crashes, the hosted engine will be started up on another node. It just takes a few minutes for this all to happen, but it works reliably in my experience. 

On Mon, Apr 2, 2018 at 5:42 PM, <dhy336@sina.com> wrote:

How to solute ovirt engine HA, I have a three node cluster, one of is deploy engine and node , others are node, if node that deplay engine and  node crash, How to ensure my server is up?
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