Arvados

Each request received by Keep should be logged to a file specified by the --log option. Following Apache logging conventions, each request should be written to a single line with:

• the request IP address
• OAuth token
• timestamp
• URL method and path
• HTTP response code

e.g.

208.90.57.196 - 2014-07-08 13:14:15 GET /d41d8cd98f00b204e9800998ecf8427e+0 403

For diagnostics, Keep should log messages to a file specified by the --error_log option.

Keep should support log levels ERROR, WARN, INFO and DEBUG. The --log_level option specifies the current log level. Any message at that level or higher should be written to the error log.

Alternative approaches:

• Just use the log/syslog package
• Log each category to a different stream described in http://www.goinggo.net/2013/11/using-log-package-in-go.html. I haven't been able to decide on a configuration syntax for that and am not sure I see the value in having e.g. INFO and DEBUG going to completely separate streams anyway.