Open Stack

Hi

Given...

On 26 Jun 2014, at 20:20, Clint Byrum <clint at fewbar.com> wrote:
> we should just have a file in /var/run that

and...

> I think we should focus just on "how do we re-assert state?".

... for the reboot case, we could have os-collect-config check for the presence of the /var/run file when it starts, if it doesn't find it, unconditionally call o-r-c and then write out the file. Given that we're starting o-c-c on boot, this seems like a fairly simple way to get o-r-c to run on boot (and one that could be trivially disabled by configuration or just dumbly pre-creating the /var/run file).

> Whenever a new version is detected, os-collect-config would set a value
> in the environment that informs the command "this is a new version of

I like the idea of exposing the fact that a new config version has arrived, to o-r-c scripts, but...

>  if !service X status ; then service X start

... I always worry when I see suggestions to have periodic state-assertion tasks take care of starting services that are not running, but in this case I will try to calm my nerves with the knowledge that service(1) is almost certainly talking to a modern init which is perfectly capable of supervising daemons :D

Cheers,

Chris