[Starlingx-discuss] StarlingX 2.0 Duplex Controller in Active/Active HA

Anirudh Gupta Anirudh.Gupta at hsc.com
Tue Dec 3 11:19:20 UTC 2019


Hi Shuicheng

We specifically wanted to understand whether "Openstack Services" like Nova, Neutron etc are working in Active/Active or Active/StandBy.
In the "sm-dump", there are "vim-services" mentioned, but there is no information about the state of individual "Neutron" services and all other.

controller-0:/home/sysadmin# sm-dump

-Service_Groups------------------------------------------------------------------------
oam-services                     standby              standby
controller-services              standby              standby
cloud-services                   standby              standby
patching-services                standby              standby
directory-services               active               active
web-services                     active               active
storage-services                 active               active
storage-monitoring-services      standby              standby
vim-services                     standby              standby
---------------------------------------------------------------------------------------

-Services------------------------------------------------------------------------------
oam-ip                           enabled-standby      disabled
management-ip                    enabled-standby      disabled
drbd-pg                          enabled-standby      enabled-standby
drbd-rabbit                      enabled-standby      enabled-standby
drbd-cgcs                        enabled-standby      enabled-standby
drbd-platform                    enabled-standby      enabled-standby
pg-fs                            enabled-standby      disabled
rabbit-fs                        enabled-standby      disabled
nfs-mgmt                         enabled-standby      disabled
cgcs-fs                          enabled-standby      disabled
platform-fs                      enabled-standby      disabled
postgres                         enabled-standby      disabled
rabbit                           enabled-standby      disabled
cgcs-export-fs                   enabled-standby      disabled
platform-export-fs               enabled-standby      disabled
cgcs-nfs-ip                      enabled-standby      disabled
platform-nfs-ip                  enabled-standby      disabled
sysinv-inv                       enabled-standby      disabled
sysinv-conductor                 enabled-standby      disabled
mtc-agent                        enabled-standby      disabled
hw-mon                           enabled-standby      disabled
dnsmasq                          enabled-standby      disabled
fm-mgr                           enabled-standby      disabled
keystone                         enabled-standby      disabled
open-ldap                        enabled-active       enabled-active
snmp                             enabled-standby      disabled
lighttpd                         enabled-active       enabled-active
horizon                          enabled-active       enabled-active
patch-alarm-manager              enabled-standby      disabled
mgr-restful-plugin               enabled-active       enabled-active
ceph-manager                     enabled-standby      disabled
vim                              enabled-standby      disabled
vim-api                          enabled-standby      disabled
vim-webserver                    enabled-standby      disabled
guest-agent                      enabled-standby      disabled
haproxy                          enabled-standby      disabled
pxeboot-ip                       enabled-standby      disabled
drbd-extension                   enabled-standby      enabled-standby
extension-fs                     enabled-standby      disabled
extension-export-fs              enabled-standby      disabled
etcd                             enabled-standby      disabled
drbd-etcd                        enabled-standby      enabled-standby
etcd-fs                          enabled-standby      disabled
barbican-api                     enabled-standby      disabled
barbican-keystone-listener       enabled-standby      disabled
barbican-worker                  enabled-standby      disabled
cluster-host-ip                  enabled-standby      disabled
docker-distribution              enabled-standby      disabled
dockerdistribution-fs            enabled-standby      disabled
drbd-dockerdistribution          enabled-standby      enabled-standby
ceph-mon                         enabled-standby      disabled
cephmon-fs                       enabled-standby      disabled
drbd-cephmon                     enabled-standby      enabled-standby
ceph-osd                         enabled-active       enabled-active
helmrepository-fs                enabled-standby      disabled
registry-token-server            enabled-standby      disabled
dbmon                            enabled-standby      enabled-standby
------------------------------------------------------------------------------


In order to verify it, we captured "neutron-server" logs of both the StarlingX servers.

Case 1: Horizon is accessed using Floating Ip and One VM is spawned

It goes on Active Controller and "neutron-server" logs of Active Controller shows the creation of network port and assigning port to the VM.

Case 2: Horizon is accessed using Floating Ip and Two VM's are spawned simultaneously

In this case, one VM gets spawned on Active Controller and Other on Standby Controller.
But "neutron-server" logs of both the controller shows the creation of network port and assigning port to the VM.

Inference:
As per our understanding, if all the "Openstack Services" were configured in Active/Standby, then request would have come to only Active Controller.
But, in this case both the Controllers are serving the request which implies that all the Openstack Services are configured in "Active/Active" State

Is our understanding correct that the StarlingX Nodes are in Active-Standby configuration, but all the Openstack Services are configured in Active-Active State?

Regards
Anirudh Gupta


From: Lin, Shuicheng <shuicheng.lin at intel.com>
Sent: 03 December 2019 05:57
To: Anirudh Gupta <Anirudh.Gupta at hsc.com>; starlingx-discuss at lists.starlingx.io
Subject: RE: [Starlingx-discuss] StarlingX 2.0 Duplex Controller in Active/Active HA

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 at hsc.com<mailto:Anirudh.Gupta at hsc.com>>
Sent: Monday, December 2, 2019 6:59 PM
To: Lin, Shuicheng <shuicheng.lin at intel.com<mailto:shuicheng.lin at intel.com>>; starlingx-discuss at lists.starlingx.io<mailto:starlingx-discuss at 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 at intel.com<mailto:shuicheng.lin at intel.com>>
Sent: 01 December 2019 12:42
To: Anirudh Gupta <Anirudh.Gupta at hsc.com<mailto:Anirudh.Gupta at hsc.com>>; starlingx-discuss at lists.starlingx.io<mailto:starlingx-discuss at 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 2nd 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 at hsc.com<mailto:Anirudh.Gupta at hsc.com>>
Sent: Thursday, November 28, 2019 11:45 AM
To: starlingx-discuss at lists.starlingx.io<mailto:starlingx-discuss at lists.starlingx.io>; starlingx-announce at lists.starlingx.io<mailto:starlingx-announce at 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<https://ind01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.starlingx.io%2Fdeploy_install_guides%2Fr2_release%2Fbare_metal%2Faio_duplex.html&data=02%7C01%7C%7Cf562d0dcaf78415e665908d77787894c%7Ca65543b9ae9349b580f00b85821adc50%7C1%7C0%7C637109296343270789&sdata=N6j0aSQyfDqfvksPZddQuM%2FcQRYg2UfEQiRYhQc7JoE%3D&reserved=0>


  *   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 at lists.starlingx.io<mailto:starlingx-discuss at lists.starlingx.io>; starlingx-announce at lists.starlingx.io<mailto:starlingx-announce at 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<https://ind01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.starlingx.io%2Fdeploy_install_guides%2Fr2_release%2Fbare_metal%2Faio_duplex.html&data=02%7C01%7C%7Cf562d0dcaf78415e665908d77787894c%7Ca65543b9ae9349b580f00b85821adc50%7C1%7C0%7C637109296343270789&sdata=N6j0aSQyfDqfvksPZddQuM%2FcQRYg2UfEQiRYhQc7JoE%3D&reserved=0>

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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