[Starlingx-discuss] Instance HA (IHA)

[Michel Thebeau]

Hi Volker,

Yes, what is described online as instance HA is working in StarlingX.  I 
tested on a cluster with dedicated storage.

I added storage extra spec to a flavor, like this:
$ nova flavor-key ${flavour_name} set 
aggregate_instance_extra_specs:storage=remote

And I added all the computes to the existing host aggregate named 
remote_storage_hosts (it already has extra spec storage=remote).

Then I launched an instance.  And I abruptly stopped the host it was 
running on.  After a few seconds the controller recognized the compute 
was not responding and the instance was rebuilt on the other compute.

===

If you still have a question for load-balancing, I recommend a new 
message to starlingx discuss list with instance load-balancing in the 
subject line.

M

On 2018-11-05 11:45 a.m., Michel Thebeau wrote:
> Hi Volker,
>
> For context, documents describe Instance HA as "respawn the VM on 
> another compute when the compute the VM was running on fails". But you 
> wrote "load-balancer", from what I can tell these are different 
> subjects.  Do you have a document I can refer to?
>
> ===
>
> In so far as I am aware, if you kick a compute node over, the VMs that 
> were running there will restart on another compute node in the cluster 
> (assuming another compute can run them).  I actually haven't tested 
> this on startlingx though.  I'll intend to do that today, now that 
> you've asked about it.
>
> I know nothing about load-balancing.
>
> M
>
>
>
>
> On 2018-11-02 10:15 a.m., von Hoesslin, Volker wrote:
>> Hello,
>> has starlingX IHA support? I didnt find it? In generally I didn't 
>> find HA load-balancer features? What about Octavia 
>> https://wiki.openstack.org/wiki/Octavia ?
>>
>> Greez & thx, Volker...
>>
>>
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>
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