[sheepdog] [PATCH] add INFO level operation logging on each node.

[MORITA Kazutaka]

At Fri, 31 Jan 2014 13:31:29 +0900,
Matsuo Yoshinori wrote:
> 
> Hitoshi & I discussed again.
> 
> We have an another future idea that adds context id in the log message to
> trace easily.
> 
> i.e.
> dog command logs:
>     Jan 31 13:19:34 sheep-01-00 sheepdog admin operation[1998]: dog cluster
> format, context=c-aaaa
> 
> sheep process logs:
>    Jan 31 13:19:34  INFO [main] rx_main(770) req=0x7f8c500008c0, fd=31,
> client=127.0.0.1:46608, op=MAKE_FS, data=plain, context=c-aaaa
>    Jan 31 13:19:34  INFO [main] tx_main(770) req=0x7f8c500008c0, fd=31,
> client=127.0.0.1:46608, op=MAKE_FS, result=00, context=c-aaaa
> 
> where context=c-aaaa is some uniqe string or timestamp.
> 
> It works like NDC(Nested Diagnostic Context. we are not focused on "nested"
> though.) feature in log4j.
> We can correct with tools such as syslogd and fluentd.
> And then we can analyze the operation and troubles with grepped by context.
> We are also trying to use tools like fluentd for helping our practical
> operatin.

Okay, it makes sense.  I'm looking forward to the feature.

Thanks,

Kazutaka