[openstack-dev] [oslo.config] Centralized config management

Oleg Gelbukh ogelbukh at mirantis.com
Thu Jan 9 18:22:53 UTC 2014


Thanks for bringing this up. We've been thinking a lot about handling of
configurations while working on Rubick.

In my understanding, oslo.config could provide an interface to different
back-ends to store configuration parameters. It could be simple centralized
alternative to configuration files, like k-v store or SQL database. It also
could be something complicated, like a service of its own
(Configration-as-a-Service), with cross-services validation capability etc.

By the way, configuration as a service was mentioned in Solum session at
the last summit, which implies that such service could have more then one

The first step to this could be abstracting a back-end in oslo.config and
implementing some simplistic driver, SQL or k-v storage. This could help to
outline requirements to future configuraiton service.

Best regards,
Oleg Gelbukh

On Thu, Jan 9, 2014 at 1:23 PM, Flavio Percoco <flavio at redhat.com> wrote:

> On 08/01/14 17:13 -0800, Nachi Ueno wrote:
>> Hi folks
>> OpenStack process tend to have many config options, and many hosts.
>> It is a pain to manage this tons of config options.
>> To centralize this management helps operation.
>> We can use chef or puppet kind of tools, however
>> sometimes each process depends on the other processes configuration.
>> For example, nova depends on neutron configuration etc
>> My idea is to have config server in oslo.config, and let cfg.CONF get
>> config from the server.
>> This way has several benefits.
>> - We can get centralized management without modification on each
>> projects ( nova, neutron, etc)
>> - We can provide horizon for configuration
>> This is bp for this proposal.
>> https://blueprints.launchpad.net/oslo/+spec/oslo-config-centralized
>> I'm very appreciate any comments on this.
> I've thought about this as well. I like the overall idea of having a
> config server. However, I don't like the idea of having it within
> oslo.config. I'd prefer oslo.config to remain a library.
> Also, I think it would be more complex than just having a server that
> provides the configs. It'll need authentication like all other
> services in OpenStack and perhaps even support of encryption.
> I like the idea of a config registry but as mentioned above, IMHO it's
> to live under its own project.
> That's all I've got for now,
> FF
> --
> @flaper87
> Flavio Percoco
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