[sdnog] help choosing configuration management utility

[Samir S. Omer]

Dear SdNOGgers,

I'm considering deploying a Configuration Management Utility in my network.
which software do you recommend for me (Puppet, Chef, Anisble) ?
also, is there any other factors I should consider before deploying the utility?

on other regard, I like to experiment with OpenStack can you point me to some good resources?

thanks  
Samir