On 22-06-14 21:10, Nolan Darilek wrote:
> Hi.
>
> I'm attempting to use DBMail along with OpenSMTPD as a containerized
> email solution. Each component runs as a single process in a Docker
> container without syslog. Ideally all logging is sent to stdout/stderr
> so the "docker logs" command, and indirectly journalctl on CoreOS, can
> read container logs.
ok. sounds viable.
> Unfortunately, I'm encountering some errors in the communication between
> OpenSMTPD and DBMail that I'd imagine should log something, only I get
> nothing. I have this in my config:
>
> syslog_logging_levels = 255
> file_logging_levels = 255
>
> I would assume this should leave something in /var/log/dbmail.{log,err},
> but both are empty. Ideally I'd like for there not to be a
> dbmail.{log,err} and just log everything to stdout/stderr.
In file_logging mode all stderr output is simply redirected to the
error_log file. So the basic infrastructure is there. It just needs to
skip the redirection step (scan for freopen).
>
> What am I missing? I can't find any documentation on how to do this.
Eh. Docker hit 1.0 only last week or so. What did you expect :-) No-one
ever asked for stderr/stdout logging on the tty before, ever!
> Docker shows no process output for dbmail-lmtp even after I connect
> manually and send all sorts of bad data that I'd expect to log
> *something*, even if only "session connected, session disconnected."
So how *are* you launching dbmail-lmtpd? I suppose you specify it in the
CMD statement of your dockerfile, but you might clarify here. Perhaps
even share your dockerfile.
If *I* would launch lmtpd from a single-process container I would use
something like
CMD ["/usr/sbin/dbmail-lmtpd", "-D"]
But maybe you're doing it differently.
Anyway. DBMail not logging at all means something else is going on. Can
you properly connect and get a decent handshake when talking to lmtpd (a
220 reply)?
Have you tried running the container with /bin/bash as entrypoint and
starting the lmtpd process manually, perhaps even in stdin/stdout mode
using -n ? Just to see if it actually works and is able to talk to the
database etc.
--
________________________________________________________________
Paul J Stevens pjstevns @ gmail, twitter, github, linkedin
www.nfg.nl/[email protected]/+31.85.877.99.97
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