OpenShift  # yum install docker  # yum update  Once we have all the above base packages installed in both of the machines, the next step  would be to set up Docker on the respective machines.  Step 2: Configure Docker so that it should allow insecure communication on the local  network only. For this, edit the Docker file inside /etc/sysconfig. If the file is not present  then you need to create it manually.  # vi /etc/sysconfig/docker  OPTIONS=--selinux-enabled --insecure-registry 192.168.122.0/24  After configuring the Docker on the master machine, we need to set up a password-less  communication between both the machines. For this, we will use public and private key  authentication. Step 3:  Generate keys on the master machine and then copy the id_rsa.pub key to the  authorized key file of the node machine, which can be done using the following command.  # ssh-keygen # ssh-copy-id -i .ssh/id_rsa.pub root@ose3-node.test.com  Once you have all of the above setup in place, next is to set up OpenShift version 3 on the  master machine.  Step 4:  From the master machine, run the following curl command.  # sh <(curl -s https://install.openshift.com/ose)  18 