Difference between revisions of "Entropy"

Latest revision as of 01:19, 8 June 2014

Revised on: 6/8/2014 by Pranesh Pandurangan

Summary

Entropy is a framework to write audit and repair scripts for openstack. It will allow writing cluster-check scripts, and define reactions to the errors/issues these bugs raise.

Entropy will allow developers to write health checkers without worrying about deployment, setting up a Jenkins, integrating with an emailer, etc. It also allows definition of "reaction" scripts that wait on issues and take well defined actions (file a ticket, mark a hypervisor bad, etc). This automates reacting to failure at one level, and tackles inundating SEs with emails about (probably) minor issues. A potentially more important use is to aggregate failures, notice trends in failures, and developing a database of known failures to make dealing with new ones easier.

Conceptual Example

We're working on uploading entropy to Pypi. You'll need to run entropy manually till then.

# install
git clone https://github.com/stackforge/entropy.git
cd entropy
python setup.py install (might need sudo).

# Pick out entropy/entropy/examples. The example cfgs might need a few minor changes to work for you.

Terminal 1: 
# start an engine.
cd entropy/ 
python entropy start-engine -n test -c examples/cfg/test.cfg

Terminal 2:
tail -f examples/logs/entropy.log 

Terminal 3:
python entropy register-repair -n demo -c examples/repair/react.json  -e test
python entropy register-audit -n demo -c examples/audit/audit.json -e test

# running the above commands will create a demo.log in examples/logs
Terminal 4:
tail -f examples/logs/demo.log