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What this folder is all about

This folder contains the playbooks used to provision and manage the RHEL 7 VMs that host the Kubernetes cluster. Users don't have direct access to these machines, but nonetheless, they need to be configured and maintained. That's what the files here are for. 🎉

Getting up and running

First, you'll need to install Ansible and specify a user and SSH key to access the RHEL VMs. Please set this in $HOME/.ansible.cfg or elsewhere if you'd like as specified in the Ansible docs. You will also need sudo privileges on the VMs.

The additional files needed and folder structure should be (roughly) as follows:

$HOME/.ansible.cfg
goobernetes/inventory.yml  # This is omitted in the public repository

Additionally, all the commands below assume you're running from the base directory of this repo. :)

The inventory.yml file uses the following roles:

  • kubeworkers = The Kubernetes workers
  • kubecontrol = The Kubernetes control plane(s)

Additionally, each node is also assigned an environment (dev, int, prod), to allow for using an intersection with it and the role of the VM.

Provisioning a new VM as a Kubernetes worker

  1. Request a new RHEL 7 VM with the same specs as the existing runner.

  2. Do all the baseline configuration you need to and then reboot.

  3. Next, run the actions-runner.yml playbook. This installs all the software needed to join a Kubernetes cluster, then gets the join token from the control plane and joins this new worker to it.

    ansible-playbook -i inventory.yml ansible/actions-runner.yml