[Engine-devel] logging in engine

[Jon Choate]

On 11/18/2011 06:42 AM, Laszlo Hornyak wrote:
> Hi,
>
> In oVirt's logging configuration we direct org.ovirt.* loggers to the engine log appender, org.ovirt.engine.ui to the ui's log and then the rest to the server log.
> The difficulties come when you start to do cross-component debugging. E.g. you see the logs of the engine in the engine log, but you would also like to see the logs of the components the engine is building upon: persistence API's (jdbc, hibernate) network communication components (e.g. httpclient, vdsm, ssh client), data processing API's (xml or json-parsers, apache commons apis) and all these logs go to the generic engine log. So when debugging you would have to merge these logs, otherwise you may miss some important details.
>
> I believe Moti's patch (http://gerrit.ovirt.org/#patch,sidebyside,257,3,backend/manager/conf/jboss-log4j.xml) is one step in the another (I believe more useful) direction.
> But rather than specifying all the components that the engine uses, wouldn't it make sense to take just let all the logs flow into a single appender?
>
> What is your opinion?
>
> Thank you,
> Laszlo
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Has any consideration been given to using the syslog appender and 
sending all messages there? Most data centers already have tools in 
place for analyzing the contents of syslog.