Installing ipython inside virtual environment

I have installed python 3.3.6 and ipython 3.0.0 from source on my account. I am on a Linux cluster (RedHad4.9). When I start ipython I get the following message:

WARNING: Attempting to work in a virtualenv. If you encounter problems, please install IPython inside the virtualenv.
WARNING: IPython History requires SQLite, your history will not be saved.

I have been looking into this for a while but I cannot find a solution. Could anybody hint me the right way?