odonfack/ocp4-deployment

Deployment ocp4.1 on vSphere environment

OCP 4.x-deployment

Automation of Deployment of ocp 4.x on vSphere environment (UPI) The purpose of this project is to help to perform automation of OpenShift 4.x cluster deployment using Ansible playbooks or /and orchestrating it by Ansible Tower It uses UPI method installation on vSphere. Running this project lab script to install OCP 4.x takes about 90 minutes if your installer Template includes only RHEL OS (PreInstall playbook take while to install all required packages) or 35-40 minutes if you are using pre-provisioned VMware template for Installer/Helper VM with all required packages Same playbooks that used in this project has been previously created for OCP 3.11 https://github.com/Ayakobov/vmware-ansible.git (For example VMware-Ansible) that we are using to create Installer/Helper VM

FAQ

What is the objective? Saving time. In about 40 minutes you get a running OCP 4.x cluster with ability to access to the underlying nodes if needed. Avoiding mistakes. Automation help us to avoid human mistakes Multiple OCP 4.x cluster deployment simultainiously from Central place (Ansible Tower) to multiple Edge Locations

How does it work? After completing DHCP, DNS prerequisites you just need to define Workflow Template in Ansible Tower that will include the relevant playbooks in certain order and Run the workflow

Why on vSphere Red Hat provides IPI installation on AWS, but many customers have VMware vSphere as their Virtualization platform and RH provides UPI deployment only for this platform, so this project creates some kind of IPI on top of UPI on vSphere

What are the limitations? This project required connected environment. Additional playbooks will be added in future to enable to perform this automation in Disconnected environment for OCP 4.2 and later versions

What are the prerequisites?

• Prepare vSphere environments and aquire the relevant details (You can see details in inventory)

• Prepare Storage accordingly (NFS, GlusterFS, VMDK) accordingly

• DHCP & DNS configuration https://github.com/Ayakobov/ocp4-deployment/blob/master/DHCP%20%26b%20DNS%20prerequisites

• Firewall configurations (Will be done by one of playbooks)

• RHEL 7.6 Template for Installer/Helper VM without any packages, but with Vmware tools (Will take more time to install all required packages) or

• RHEL 7.6 Template for Installer/Helper VM with all packages by Running (Vmware-deploy and Ocp4-preinstall playbooks) and after that creating Template from this machine (Workflow will run faster)

What does the playbooks do?

All the tasks needed to get your OCP 4.x installed and running in VMware using UPI method from Ansible Tower + helper host:

Create Helper VM

Install / Check the relevant packages, configure HTTP Server on helper server, Configure NTP Services

Download and install CLI

Download OpenShift installer

Generate an install-config.yaml for installation customization

Generate ignition files for CoreOS machines

Provision CoreOS VMs on vSphere

Power On CoreOS VMs and allow ignition files to configure machines on first boot

Optionally destroy CoreOS machines

Optionally Clean your helper VM and Ansible Tower configuration related to previous cluster deployment

Change CoreOS VMs hostnames

Run the installation

Patch Image-Registry pod to use Empty Dir

Complete the installation