[rabbitmq-discuss] lager vs sasl error log

[Gavin M. Roy]

That's awesome Tim, thanks!


On Tue, Mar 26, 2013 at 3:53 PM, Tim Watson <tim at rabbitmq.com> wrote:

> I have set up an experimental repository at
> https://github.com/hyperthunk/rabbitmq-lager that supports logging to
> lager via its built in error_logger redirection. You enable via
> `rabbitmq-plugins enable lager` and configure it in the RabbitMQ config
> file just like any other plugin, under the key 'lager'. In the morning I'll
> chat with the guys about integrating this as experimental plugin for the
> time being, so people can play around and see if it offers the required
> functionality.
>
> Cheers,
> Tim
>
> On 23 Mar 2013, at 23:06, Ben Hood wrote:
>
> > Hey Tim,
> > On Friday, 22 March 2013 at 07:55, Tim Watson wrote:
> >
> >> Yeah with the current implementation you'd need to install your own log
> handler to make that work. In terms of changing the output format though,
> allowe to play devil's advocate for a moment...
> >>
> >> The info/progress/error reports have a lot of data in them, process
> stats, stack traces, etc. are you wanting to see all that plonked on one
> single long line? Because I can see how that'd make parsing/aggregating
> easier, but not reading them. Does the lager output fit exactly with what
> you want (I've not looks at it or a couple of years)?
> > I don't think that everything needs to fit on one line. Longer traces
> which provide good context should probably remain as multiline entries.
> However, info items, for example,
> >
> > Mar 22 22:33:01 a rabbit3:  =INFO REPORT==== 22-Mar-2013::22:33:01 ===
> > Mar 22 22:33:01 a rabbit3:  Setting permissions for 'guest' in '/' to
> '.*', '.*', '.*'
> >
> > need not get split up over two lines.
> >
> > With regard to longer traces, it would be nice if they could be handled
> in such a way that the generic portion of the call stack were trimmed down
> to something nearer the actual call site, rather that the entire generic
> call trace. As inspiration, logback mitigates the default "root cause comes
> last" behavior in Java with the reverse depth layout modifier (rEx{depth}).
> Lot's of hand waving here though.
> >
> > Finally, I do have to concur with Gavin on people's perception about
> Rabbit due to logging - I've have many conversations with people over the
> years who ask why Rabbit has such bizare logging - I've generally answered
> that this is an Erlang-ism, and though it is strange, the server kind of
> serves its primary function well (i.e. delivering messages), so just put up
> with it.
> >
> > Cheers,
> >
> > Ben
> > _______________________________________________
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>
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Gavin M. Roy
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