OpenShift 4 Disconnected

Table of Contents

• Purpose
• Requirements
• Dependencies
• Internet Connected Side
• Air Gap Side
• Miscellaneous
• License
• Contributors

Purpose

This repository contains scripts, ansible roles, and other toosl for deploying an OpenShift 4 cluster in an air-gapped environment.

The repository has been tested to work for installs of OpenShift 4.3, 4.4, and 4.5.

The helper node in the internet connected environment, as well as the helper node in the air-gap environment have been tested on RHEL 8. Most things will still work on RHEL 7 but not all.

These tools can also be used in semi-disconnected environments which can be reached through a proxy host from the public internet.

Requirements

Dependencies

Internet Connected Side

This section covers getting started on the internet connected helper node. This is where all tools and images will be downloaded to

• Download Pull Secret from Red Hat

• Create main variable file

• Create the Ansible Inventory file

• Create a docker registry for mirrored images(Optional)

• Mirror OpenShift Cluster Images

• Mirror Red Hat CoreOS

• Mirror Tools

• Mirror OperatorHub Images

• Mirror RPM Repositories(Optional)

• Mirror Additional Container Images(Optional)

• Mirror Helm and Helm Charts(Optional)

Air Gap Side

This section covers setting up the infrastructure in the air gap environment and install the OpenShift 4 cluster

• Create main variable file

• Create the Ansible Inventory file

• Configure AWS Infrastructure Variable File (for AWS only)

• Configure AWS Infrastructure Variable File (for VMWare only)

• Provision RPM Repo Mirror

• Install Tools

• Post Install

Miscellaneous

When installing in an emulator you may require an SSH tunnel to reach the web console. The DNS names need to be configured because the cluster's pages will redirect so using IPs directly won't work.

ssh -L 127.0.0.2:8443:<IP Address of the https load balancer>:443 -L 127.0.0.2:8080:<IP Address of the https load balancer>:80 ec2-user@proxyhost

Inside your local /etc/hosts:

127.0.0.2 console-openshift-console.apps.<ocp_cluster_name>.<ocp_base_domain> oauth-openshift.apps.<ocp_cluster_name>.<ocp_base_domain>

Now browse to https://console-openshift-console.apps.<ocp_cluster_name>.<ocp_base_domain>

License

Contributors

• Dan Clark (maintainer)