[erlang-questions] Distributed application logging

Jayson Vantuyl <>
Wed Dec 23 22:14:13 CET 2009


I would write my own log handler that wrapped log_mf_h and recovered the node info when the event was received.  Basically, just insert yourself and add the information you want.

On Dec 23, 2009, at 8:48 AM, Steve wrote:

> I'm hoping someone might shed some light on the best/easiest way to do distributed application event logging.
> 
> In my app I have master node, two failover master nodes, and then a set of nodes that are coordinated by the master node and communicate with the master node via global fully qualified names. Each node will run its own application instance, vm and hardware.
> 
> My goal is to log all standard sasl events which are generated on the local nodes (alarms, errors, progress and supervisor reports) to the central master node.
> 
> The way I currently do this is to 1) register a global event manager on the central node and 2) send local sasl events to this global manager. I have a log_mf_h handler on the central node which I use to manage the global log. This code exists as its own application alongside my main application so I can get progress reports about the main application starting, etc.
> 
> This all works pretty well. The only "problem" is that log_mf_h and rb don't say much about the node that generated the event. Pids are of course there, and I know I can get node info from a pid via node/1. I can probably send my own reports to log_mf_h or create my own round robin log that contains reports with info about the nodes. But I'd rather get the most out of what's already there in erlang if I can being a big fan of not reinventing the wheel.
> 
> So... I guess my question is: am I on the right track more or less, or have I missed something in the docs/libs or my app design that would help me?
> 
> Thanks in advance.
> 
> Steve
> 
> 
> 
> 
> 
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-- 
Jayson Vantuyl








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