Boris,

I am currently deploying Liberty under Centos 7 using the RDO Manager. The steps I am taking are:

1. Follow the Kilo guide in rdoproject.org
2. Add the following repos:

http://trunk.rdoproject.org/centos7/current/delorean.repo
http://trunk.rdoproject.org/centos7/delorean-deps.repo

3. Install RDO Manager / Director 
sudo yum install python-tripleoclient (changed names in Liberty)

4. Continue with the Kilo guide.

 IB

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Ignacio Bravo
LTG Federal, Inc
Office: (703) 951-7760