hist-em

Implements a Histogram EM example. Internally this element manager consists of a web server that wraps the execution of a cyclictest, providing endpoints for starting, stoping Cyclictest and getting statists.

To use this element manager:

• go build, in order to compile the code
• ./server, in order to start the web server
• curl http://localhost:9000/v1/start To start the collection of data.
• ps aux | grep cycl to ensure that cyclicTest is running in the background.
• curl http://localhost:9000/v1/data

Extra:

In order to simulate a more compact senario, one can use collector program to querry element manager and write data to Redis.

Conventions:

In order to allign to nfvacc conventions regarding histogram-element-manger implementation, you should provide a /v1/data endpoint serving data in the following format:

{  
   "histogram":[  
      {  
         "value":0.0,
         "count":0
      },
      {  
         "value":5.0,
         "count":158
      },
      {  
         "value":10.0,
         "count":823
      }
   ]
}

Notice that value field holds float numbers while count field integers.