Hi Anirudh,

What is the purpose or benefit you want to have 2 active controller?

I think it is reasonable there is 1 active controller only, and another controller is standby for backup, this is the meaning of HA.

Two active controller at the same time will cause brain split.

What do you mean “Openstack Services”? Openstack is containerized now, and run in both nodes by K8S.

Best Regards

Shuicheng

From: Anirudh Gupta <Anirudh.Gupta@hsc.com>
Sent: Monday, December 2, 2019 6:59 PM
To: Lin, Shuicheng <shuicheng.lin@intel.com>; starlingx-discuss@lists.starlingx.io
Subject: RE: [Starlingx-discuss] StarlingX 2.0 Duplex Controller in Active/Active HA

Hi Shuicheng,

All the services on the Active Controller are “enabled-active” and I can see some services “enabled-standby” on the standby controller.

Is there any way we can set all the Openstack Services “enabled-active” on both the Active and Standby Node?

Regards

Anirudh Gupta

From: Lin, Shuicheng <shuicheng.lin@intel.com>
Sent: 01 December 2019 12:42
To: Anirudh Gupta <Anirudh.Gupta@hsc.com>; starlingx-discuss@lists.starlingx.io
Subject: RE: [Starlingx-discuss] StarlingX 2.0 Duplex Controller in Active/Active HA

Hi Anirudh,

Per my understanding, for duplex, there is always 1 active node and 1 standby node.

The “active/active” or “active/standby” in the document is for “services”, not for node.

If you try to run “sudo sm-dump” in the standby node, you will find some services are “active”, while some services are “standby”.

For the 2^nd question, VMs are running in compute node. And for duplex, both controller nodes are compute nodes also.

And the “Active/Standby” is for controller, not for compute function, that is why VMs will run in both node.

Best Regards

Shuicheng

From: Anirudh Gupta <Anirudh.Gupta@hsc.com>
Sent: Thursday, November 28, 2019 11:45 AM
To: starlingx-discuss@lists.starlingx.io; starlingx-announce@lists.starlingx.io
Subject: Re: [Starlingx-discuss] StarlingX 2.0 Duplex Controller in Active/Active HA

Hi Team,

Can someone please give me any update on my Query:

I need to install StarlingX 2.0 Duplex Bare Metal.

As per the document, there can be 2 modes in which HA controllers can be configure i.e. either “active/active” or “active/standby”
https://docs.starlingx.io/deploy_install_guides/r2_release/bare_metal/aio_duplex.html

• Can someone please suggest the steps to configure Active-Active state?
• I have 2 kubernetes pods corresponding to each Openstack Service in Duplex Setup and when I spawn any VM, it goes on any of the two controllers. So, is this the standard implementation in StarlingX? What needs to be done in Active-Standby configuration?
• And, what difference it would have on my deployment in terms of functionality?

Regards

Anirudh Gupta

From: Anirudh Gupta
Sent: 26 November 2019 10:30
To: starlingx-discuss@lists.starlingx.io; starlingx-announce@lists.starlingx.io
Subject: StarlingX 2.0 Duplex Controller in Active/Active HA

Hi Team,

I need to install StarlingX 2.0 Duplex Bare Metal.

As per the document, there can be 2 modes in which HA controllers can be configure i.e. either “active/active” or “active/standby”
https://docs.starlingx.io/deploy_install_guides/r2_release/bare_metal/aio_duplex.html

Can someone please suggest the steps to configure Active-Active state?

And, what difference it would have on my deployment in terms of functionality?

Regards

Anirudh Gupta

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