Open Stack

Hi,


Today the OpenStack HA guide written by Florian Haas and my self needs
to be updated from active / passive to active / active mode.
Since some services have been updated in Grizzly, I would like to submit
a new documentation explaining how to configure this setup :

- API nodes (all OpenStack APIs) -> load balanced by HAproxy (I'll share
my running configuration)
- Scheduler nodes (*-scheduler + nova-conductor) -> Multiple running :
horizontal scale
- Compute nodes (nova-compute + Quantum L3 Agent + Quantum DHCP Agent +
Quantum L2 Agent + Quantum Metadata Agent) : no HA, but scaling of
Quantum L3 & DHCP agents
- Storage node (cinder-volume) -> can't be run in full HA as far I know.
- RabbitMQ cluster
- MySQL Cluster (Galera)

Then, I'll like to know what is the best choice :
- Split the guide in two parts : Active / Active & Active / Passive ?
- Drop Active / Passive part and updating it for Active / Active setup ?

Before submitting my patches, let me know your thoughts.

Note : Please don't hesitate to share your feedback if you also run
OpenStack in production with HA.


Cheers,

-- 
Emilien Macchi
----------------------------------------------------
# OpenStack Engineer
// eNovance Inc.              http://enovance.com
// ✉ emilien at enovance.com     ☎ +33 (0)1 49 70 99 80
// 10 rue de la Victoire 75009 Paris


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