OK, that’s exactly what I needed to know. Thanks! On Jan 31, 2016, at 9:16 AM, Steve Jenkins <st...@stevejenkins.com> wrote:
> On Sun, Jan 31, 2016 at 9:04 AM, Ron Garret <r...@flownet.com> wrote: > OK, but is there any way to get Postfix to restart a milter if it goes down? > By default, if a milter goes down, it takes postfix down with it. > > The usual way to start a milter service is to have it autostart when the > server boots, just as you would with any service. For example, if you're > using systemd, you'd have a miltername.service unit file to fire it up. > > I don't know of any way for Postfix itself to then monitor the running milter > service to respawn if it fails, but the two milters I'm most familiar with -- > OpenDKIM and OpenDMARC -- both have "AutoRestart=yes" configuration options > in their conf files to respawn themselves in the event they fail. I assume > they're monitoring their own PID file, or something to that effect, but I'm > not a programmer, so I don't know what's under-the-hood to enable that. I > have Nagios configured to regularly check that Postfix is up, and separately > monitor my important milters. > > If you're looking to write your own milter service, I'd join the dev > discussion list for one of the milters that supports AutoRestart (such as > OpenDKIM) and ask about it there. A good number of guys on this Postfix list > are also on that list. > > Or you could look through the source code on SourceForge and find the > AutoRestart stuff: > > http://sourceforge.net/projects/opendkim/ > > SteveJ
