Source code to gluster documentation: http://gluster.readthedocs.io
If you are on EPEL 7 or Fedora, the first thing you will need is to install mkdocs, with the following command :
#sudo yum install mkdocs
For Fedora 23+ (run the following in root)
#dnf install python-pip
#pip install mkdocs
Then you need to run mkdocs from the root of that repository:
$ mkdocs build
The result will be in the site/
subdirectory, in HTML.