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In my situation, there are three Openstack clusters deployed at three different cities which called regionA, regionB and regionC.

  • We use the one keystone service which is only deployed in regionA.
  • Now we should deploy the keystone backup service at regionC, this regionC keystone is only for backup or using while regionA keystone shutdown.

How could I achieve that?

In my opinion, we should deploy the databases like MariaDB and Keystone service at regionC, but I can't figure out how to do, this reference "Multiple Regions Deployment with Kolla" can't solve my problem

Rohit Gupta
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VictorLee
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  • I don't use multiple regions and I'm not familiar with kolla, but the general idea is described [here](https://object-storage-ca-ymq-1.vexxhost.net/swift/v1/6e4619c416ff4bd19e1c087f27a43eea/www-assets-prod/presentation-media/slides.pdf). There are also a couple of interesting videos from openstack summit out there which talk about multi-region deployments. Basically, the database is a galera cluster which replicates between regions. – eblock Apr 24 '23 at 12:38

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