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[Openstack] [masakari] HA Compute & Instance Evacuation


On 05/02/2018 04:39 PM, Torin Woltjer wrote:
>  > There is no HA behaviour for compute nodes.
>  >
>  > You are referring to HA of workloads running on compute nodes, not HA of
>  > compute nodes themselves.
> It was a mistake for me to say HA when referring to compute and 
> instances. Really I want to avoid a situation where one of my compute 
> hosts gives up the ghost, and all of the instances are offline until 
> someone reboots them on a different host. I would like them to 
> automatically reboot on a healthy compute node.
> 
>  > Check out Masakari:
>  >
>  > https://wiki.openstack.org/wiki/Masakari
> This looks like the kind of thing I'm searching for.
> 
> I'm seeing 3 components here, I'm assuming one goes on compute hosts and 
> one or both of the others go on the control nodes?

I don't believe anything goes on the compute nodes, no. I'm pretty sure 
the Masakari API service and engine workers live on controller nodes.

> Is there any documentation outlining the procedure for deploying
> this? Will there be any problem running the Masakari API service on 2
> machines simultaneously, sitting behind HAProxy?
Not sure. I'll leave it up to the Masakari developers to help out here. 
I've added [masakari] topic to the subject line.

Best,
-jay