Re: graceful restart under runit

[Alex Efros <powerman@powerman.asdfGroup.com>]

Hi!

On Thu, Nov 16, 2006 at 04:24:46PM +0100, Dra?en Ka?ar wrote:
> However, there are multithreaded monsters which can't do that. fork()

:-/

Another option - you can ask runsv to 'x' (Exit) instead of 't' (Term).
In this case runsv will send SIGTERM to your process, which can process it
by just closing listening socket, waiting until existing connection finish
and then exit.
After few (up to 5) seconds runsv will be started again by runsvdir, and
so start second process of that server (which will open listening socket
again).

Probably you can even convert 't' to 'x' using file ./control/t - to be
able to use 't' instead of 'x' for restarting this service just as for any
other services.


P.S. Of course, better solution is not develop multithreaded monsters :)
or split that monster into two processes - one for accepting connections
and second for processing these connections (that architecture also much
better scale because you can run multiple "second" processes, each
multithreaded and process many connections - this proven to have better
performance compared to single multithreaded process or many
singlethreaded processes).

-- 
			WBR, Alex.