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Kubernetes Cluster Ansible

Purpose

The goal of this project is to demonstrate how to build a Kubernetes cluster on bare metal or VMs and deploy it to multiple different environments.

Inventory/Environments

  • Vagrant/Virtual Box
  • Home lab (coming soon)
  • The plan in the future is to deploy it on some cheap cloud VM's

Vagrant

  • Install Vagrant and Virtual Box-

Inventories

Vagrant

  • Add the following to your hosts file:
192.168.56.111 srv1
192.168.56.112 srv2
192.168.56.113 srv3

Local Development (Devcontainer)

Ansible is run from a devcontainer to ensure a consistent, up-to-date version. You will need:

1. Open the project in the devcontainer

Open the project in VS Code, then either accept the "Reopen in Container" popup or run via the command palette (Ctrl+Shift+P):

Dev Containers: Reopen in Container

The first run will pull the image and may take a minute. Subsequent opens are instant.

2. Start the Vagrant VMs

From a terminal on your host machine (not inside VS Code):

vagrant up

This boots the three VMs without running Ansible. You can verify they are up with:

vagrant status

3. Install Ansible roles and collections

From the VS Code terminal (inside the devcontainer):

ansible-galaxy install -r roles/requirements.yml
ansible-galaxy collection install -r collections/requirements.yml

4. Run the playbook

ansible-playbook -i inventory/local_vagrant site.yml --become

Re-running the playbook

Just re-run step 4. No need to restart the VMs.

Tearing down

From the host terminal:

vagrant destroy -f

Home Servers

  • This is a for sure a work in progress.... Currently, I only have three Lenovo m910q machines plugged straight into my ISP modem (It's not serving anything to the internet).
  • I plan to extend this with a pfsense or opnsense firewall and implement vLANs, VPN and isolate everything from my home devices before serving anything over the internet.
Host Host 1 Host 2 Host 3
Model Lenovo m910q Lenovo m910q Lenovo m910q
CPU Intel i5 7500T Intel i5 7500T Intel i5 7500T
RAM 8GB 8GB 8GB
Storage 256GB NVM 256GB NVM 256GB NVM
NIC Intel 1Gb I219-LM Intel 1Gb I219-LM Intel 1Gb I219-LM