Clarity¶ ↑

• github.com/tobi/clarity

Clarity - a log search tool By John Tajima & Tobi Lütke

Clarity is a Splunk like web interface for your server log files. It supports searching (using grep) as well as trailing log files in realtime. It has been written using the event based architecture based on EventMachine and so allows real-time search of very large log files. If you hit the browser Stop button it will also kill the grep / tail utility.

We wrote Clarity to allow our support staff to use a simple interface to look through the various log files in our server farm. The application was such a big success internally that we decided to release it as open source.

Warning: Clarity takes parameters from URLs and runs them in the shell. This is essentially the most insecure thing imaginable. You have to make absolutley sure that clarity isn’t reachable by the outside world. At the very least use –username and –password to put some protection on it.

clarity --username=admin --password=secret --port=8989 /var/log
clarity --port=8989 --include="tomcat6/*.log*" --include="apache2/*.log*" /var/log

Specific options:
    -f, --config=FILE                Config file (yml)
    -p, --port=PORT                  Port to listen on
    -b, --address=ADDRESS            Address to bind to (default 0.0.0.0)
        --include=MASK               File mask of logs to add (default: **/*.log*)
        --user=USER                  User to run as   
Password protection:
        --username=USER              Enable httpauth username
        --password=PASS              Enable httpauth password   
Misc:
    -h, --help                       Show this message.

* eventmachine
* eventmachine_httpserver
* json

* sudo gem install clarity

(The MIT License)

Copyright © 2009 Tobias Lütke

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ‘Software’), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OT