This Repo will help you to setup a OpenShift Master Only Server based on CentOS. In this Repo you can find a host example file for Ansible to provide a Master Only installation which is probably interesting for testing purposes. The setup process is based on OpenShift Origin

In this example we are using a Windows machine with VirtualBox installed. Our Controller is a virtual machine on Windows with CentOS 7 installed. The Master is deticated server hardware.

Download CentOS 7 as ISO which will be used for controller and master installation

1. Install the Latest VirtualBox version
2. Setup a new virtual based on RedHed x64 with standard settings
3. Configure virtual machine for bridged NIC and about 2GB of Memory
4. Start the virtual machine and select the CentOS 7 ISO from above
5. Set your Date and Time, Keyboard-Layout and Location. Do not forget to connect the networkadapter. Just set a password for root.
6. Start the OS installation
7. Take a look into Configure and Update CentOS 7 step bellow
8. From now on follow Host Preparation 1. change Repo epel-release-7-8.noarch.rpm yum -y install https://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-8.noarch.rpm 2. Clone Git Repo with Submodules git clone --recursive https://github.com/e-bits/openshift-ansible-master-only.git 3. Copy hosts.example to /etc/ansible/hosts and change hosts to your needs 4. Creating a ssh-key without password ssh-keygen 5. Copy public key from controller to master ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.2.200

1. SSH into Master using root
2. Install Docker yum install -y docker sed -i '/OPTIONS=.*/c\OPTIONS="--selinux-enabled --insecure-registry 172.30.0.0/16"' /etc/sysconfig/docker
3. use an existing, specified volume group cat <<EOF > /etc/sysconfig/docker-storage-setup VG=docker-vg EOF

1. Login to your newly created machine using root account.
2. Get the actual ip address with ip addr
3. Install pending updates yum update -y
4. To edit files directly on CentOS 7 yum install -y nano
5. Change hostname to controller or master. nano /etc/hostname
6. reboot

1. check if your master is available ansible all -m ping
2. start ansible playbook

cd openshift-ansible-master-only/openshift-ansible
ansible-playbook playbooks/byo/config.yml

3. after some time OpenShift should be installed: https://yourip:8443
4. to login to OpenShift you need to generate a user/password for htpasswd authentication or use your own method. The file is locatet at: /etc/origin/master/htpasswd. To generate a user/password in htpasswd you can use a service like this: Htpasswd Generator
5. login via ssh to your master and promote your created user from above to cluster-admin oadm policy add-cluster-role-to-user cluster-admin root

Please feel free to contribute to this repo and help improve my learning curve regarding OpenShift.