anchor.diff:  
   | Nodes a| - Physical or virtual system, or an instance running on a public IaaS
   ifdef::openshift-origin[]
  -- Base OS: Fedora 21, CentOS 7, or RHEL 7.1 Beta ("Minimal" installation option)
  -endif::[]
  -ifdef::openshift-enterprise[]
  -- Base OS: RHEL 7.1 Beta ("Minimal" installation option)
  -endif::[]
  +- Base OS: Fedora 21, CentOS 7.1, or RHEL 7.1 ("Minimal" installation option)
  +endif::[]
  +ifdef::openshift-enterprise[]
  +- Base OS: RHEL 7.1 ("Minimal" installation option)
  +endif::[]
  +- Docker 1.6 or later
   - 1 vCPU
   - Minimum 8 GB RAM
   - Minimum 15 GB hard disk space
  
positive.code: |===
  |Masters a|- Physical or virtual system
  ifdef::openshift-origin[]
  - Base OS: Fedora 21, CentOS 7, or RHEL 7.1 Beta ("Minimal" installation option)
  endif::[]
  ifdef::openshift-enterprise[]
  - Base OS: RHEL 7.1 Beta ("Minimal" installation option)
  endif::[]
  - 2 vCPU
  - Minimum 8 GB RAM
  
negative.code: 
  *Installing Docker*
  
  Docker version 1.6 or later must be installed and running on master and node hosts before installing OpenShift.
  
  ifdef::openshift-enterprise[]
  . In RHEL 7, Docker is provided in the RHEL Extras repository; first, ensure the RHEL Extras repository is enabled:
  