Hello Arnaud, Thank you for sharing. But how do you deal with db latency, example one region is in Asia and one is in America. Nguyen Huu Khoi On Sun, Jul 23, 2023 at 7:56 PM Arnaud Morin <arnaud.morin@gmail.com> wrote:
We have this model also with only one keystone. We have multiple galera clusters synchronized together. Only one cluster is used for write requests (located in one region), others are read only / cache. Most of the calls done to our keystone are "read" or token validation requests, and this works fine with a read galera cluster / cache.
I know that we also have a custom way to invalidate cache across regions, but I dont remember the details, I can ask the team.
Anyway, this is do-able :)
I imagine it also depends on the usage you have, if you create a lot of users/projects/assignments, then it may be harder to achieve.
Cheers, Arnaud
On 19.07.23 - 14:03, Nguyễn Hữu Khôi wrote:
Hello, thank you very much.
But can I ask how we process if 1 region at ASIA and 2 regions in the USA?
Database latency will be our problem.
Nguyen Huu Khoi
On Tue, Jul 18, 2023 at 8:21 PM Karl Kloppenborg < kkloppenborg@rwts.com.au> wrote:
Hi Nguy,
We’ve deployed a large multi-region openstack deployment.
As a rule of thumb we’ve got a “keystone” region which is as best we can highly available and very redundant.
We then have all other regions talk back to this region, we just usually call it “keystone” or “core” and it’s hidden from the UI from users.
We then just run a large well kept Galara cluster to support it.
--Karl.
*From: *openstack-discuss-request@lists.openstack.org < openstack-discuss-request@lists.openstack.org> *Date: *Tuesday, 18 July 2023 at 9:25 pm *To: *openstack-discuss@lists.openstack.org < openstack-discuss@lists.openstack.org> *Subject: *openstack-discuss Digest, Vol 57, Issue 55
Send openstack-discuss mailing list submissions to openstack-discuss@lists.openstack.org
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-discuss
or, via email, send a message with subject or body 'help' to openstack-discuss-request@lists.openstack.org
You can reach the person managing the list at openstack-discuss-owner@lists.openstack.org
When replying, please edit your Subject line so it is more specific than "Re: Contents of openstack-discuss digest..."
Today's Topics:
1. [openstack][largescale-sig] Openstack multi region deployment (Nguy?n H?u Kh?i) 2. Re: [openstack][largescale-sig] Openstack multi region deployment (Felix Huettner) 3. Re: [openstack][largescale-sig] Openstack multi region deployment (Nguy?n H?u Kh?i) 4. Re: [neutron] unmanaged router resources - OVN interconnect (Rodolfo Alonso Hernandez)
----------------------------------------------------------------------
Message: 1 Date: Tue, 18 Jul 2023 12:07:12 +0700 From: Nguy?n H?u Kh?i <nguyenhuukhoinw@gmail.com> To: OpenStack Discuss <openstack-discuss@lists.openstack.org> Subject: [openstack][largescale-sig] Openstack multi region deployment Message-ID: < CABAODReJ6QW8A4OENEjmhFCiM-15B0qc2La_aMr1EKfaENq9iw@mail.gmail.com> Content-Type: text/plain; charset="utf-8"
Hello guys,
I am going to deploy openstack multi regions and I know that keystone replication is the most challenging.
I plan to set up 2 regions which use centralize galera cluster(3 nodes). and one standby edge galera cluster(3 nodes)
When region 1 is node available, I will map region 2 to use standby edge galera cluster.
I hope you give me some experience and advice with multi regions.
Thank you very much.