I followed following blog on Creating Monitored Environments with Docker Compose, which is given in rancher blogs
http://rancher.com/creating-monitored-environments-with-docker-compose/
It didn’t work. Prometheus is running but, when I am executing queries for generating graphs , it doesn’t produce any result.
Is that blog old and not updated ?
The blog is pretty old considering we push out releases almost every week or two. 
I think It’s good to update old blogs or create new blogs…right? 
It is working now. Problem was in compose file. It was unable to generate required links and required scale. It may be because of blog was using Old version of Rnacher and I am using latest version.
We would love to update our old blog posts when changes come out, but with the new features/bug fixes coming out almost every week, it gets hard to keep up!
Glad that you were able to resolve the differences and get it working!