<div dir="ltr">Hi.<div>Thank you for your reply.</div><div><br></div><div>The first one has a problem because each region is too soft. If a member is down, so this region is gone. </div><div><br></div><div>It is so challenge with us.</div><div><br></div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Nguyen Huu Khoi<br></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 18, 2023 at 2:34 PM Felix Huettner <felix.huettner@mail.schwarz> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
i think you have two options here:<br>
1. you could span a single galera cluster over all of your regions.<br>
this might have some latency issues, but if your are not too write<br>
heavy that might be fine. I know some companies use that setup.<br>
2. you use some kind of multiple galera clusters with replication.<br>
But i have not yet heard of anybody using this setup.<br>
<br>
An alternative might be to have separate keystone setups with separate<br>
databases. This would probably reduce the error potential, but might not<br>
fit your usecase.<br>
<br>
Thanks<br>
Felix<br>
<br>
<br>
On Tue, Jul 18, 2023 at 12:07:12PM +0700, Nguyễn Hữu Khôi wrote:<br>
> Hello guys,<br>
><br>
> I am going to deploy openstack multi regions and I know that keystone<br>
> replication is the most challenging.<br>
><br>
> I plan to set up 2 regions which use centralize galera cluster(3 nodes).<br>
> and one standby edge galera cluster(3 nodes)<br>
><br>
> When region 1 is node available, I will map region 2 to use standby edge<br>
> galera cluster.<br>
><br>
> I hope you give me some experience and advice with multi regions.<br>
><br>
> Thank you very much.<br>
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</blockquote></div>