Re: [gentoo-dev] rfc: supervise-daemon -- a lightweight openrc daemon supervisor

[William Hubbs]

On Tue, Feb 16, 2016 at 07:32:08PM +0000, James Le Cuirot wrote:
> On Tue, 16 Feb 2016 12:51:17 -0600
> William Hubbs <williamh@g.o> wrote:
>
> > there is a branch in the OpenRC github repo called supervisor.
>
> Interesting!
>
> > It is still very rough, and not ready for production, but at this
> > point I would like to make everyone aware that it exists and  ask
> > folks to go over the code and provide comments.
>
> I'm not really qualified to comment on the code but I'm aware that
> there are lot of ways to get this wrong so please do your homework if
> you haven't done so already. Your post seems like a good start. :)
 
That's exactly why I posted it; I know this is a complex issue, so I
want others to look over the code and provide suggestions for cleaning
it up before it goes mainline.

> runit seems highly regarded and we use it at work on CentOS to allow
> users of the same UNIX group to manage a collection of processes
> without requiring root or sudo. I wasn't aware of s6 at the time but
> I've heard that's also good and this makes an interesting read.
>
> http://skarnet.org/software/s6/why.html
>
> I wonder if it might even make more sense to reuse one of these instead
> of reinventing the wheel. They are both extremely lightweight. If you
> feel you can do better though then go for it!

We have s6 support in OpenRC, and I am looking at integrating runit
support as well.

For s6 info, see the s6-guide.md file located in
/usr/share/doc/openrc-*.

This is experimental work at this point, because I've been asked to
determine how much work would be involved in having a small light-weight
supervisor in OpenRC directly.

> Regards,
> --
> James Le Cuirot (chewi)
> Gentoo Linux Developer

William