Docker Server Runtime

Check if Docker is running:

1. systemctl is-active docker

If Docker has not yet been started on the host, enable and start the service:

1. systemctl enable docker
2. systemctl start docker

If Docker is already running, re-initialize Docker:

This will destroy any containers or images currently on the host.

1. systemctl stop docker
2. rm -rf /var/lib/docker/*
3. systemctl restart docker

If there is any content in /var/lib/docker/, it must be deleted. Files will be present if Docker has been used prior to the installation of OpenShift Container Platform.

Then go to https://docs.openshift.com/container-platform/3.5/install_config/install/host_preparation.html#reconfiguring-docker-storage