KittehCluster

This is my (work in progress, deployed but nothing production running on it yet) Kubernetes clustered computing setup, based on Proxmox VE and Ubuntu Server.

Currently, I really cannot recommend that you use this setup in production yet. I have to delete and recreate my VMs multiple times a day, until I fix everything.

Prerequisites

• A POSIX-compliant computer (preferably Unix of some sort, like macOS/Linux/*BSD, but Git Bash or Cygwin would probably work) with Python and Pyyaml
• A cluster of computers preferably running Proxmox. These should (not required, but highly recommended) be connected together in Proxmox using the cluster feature.
• kubectl, and helm installed on your local computer.

Setup

VM Setup

1. First, you'll need to fork this repository, and git clone it down.
2. Run nix-shell.
3. (optional) Change SETUP_USERNAME to the username you want to use in config/.env.
4. (optional) Change SETUP_PASSWORD to the hashed password you want to use (genpasswd to generate this)
5. (Proxmox-specific, but you'll need to do a similar process on i.e ESXi, XenServer, etc.) Go to the Ubuntu Server page, and copy the minimal ISO download. Go your ISO image volume (local by default), click on ISO images, click download from URL, paste in the URL, click query URL, then download the file on all of your nodes.
6. Create VM(s) that uses a VirtIO hard drive (i.e drives with /dev/vdX), and the ISO set to the Ubuntu Server installer.
7. On your main computer, run the command ./install.sh $PATH_TO_USE_FOR_INSTALL, where $PATH_TO_USE_FOR_INSTALL is the infrastructure-defined server to use in config/infrastructure.ini.
8. When booting, press e to edit the configuration. When you see the line that says linux with --- at the end of it, remove the --- and put the command line arguments that correspond to your IP address in there. Press F10 to boot.
9. Boot it, and let it install.

Kubernetes setup

1. SSH into any of the nodes. (i.e ssh clusteradm@kitteh-node-2-k3s-server)
2. As root, grab /etc/rancher/k3s/k3s.yaml, and copy it to wherever you store your k3s configurations (on macOS, this is ~/.kube/config)
3. Go into the kubernetes directory, and copy example-secrets to secrets and modify these to be your credentials.
4. Run ./kubesync.py. If you recieve MetalLB errors while this happens, rm -rf meta, and try again. It should work on the second attempt. If not, report this issue.

Updating

Run apt update and apt upgrade -y for the base system. TODO for Kubernetes.

Customization

Adding nodes

In serverinfra/infrastructure.ini, copy the role(s) from kitteh-node-2 to a new node (ex. kitteh-node-2/server -> kitteh-node-3/server, etc), and run the install script again.

Custom cluster setup / Forking

This is a guide. You can change more stuff if you'd like, but this will get you started.

1. First, fork this Git repository if you haven't already.
2. Modify serverinfra/config/infrastructure.ini to fit your needs.

Troubleshooting

• I can't login via SSH!
  • Your SSH public keys are automatically copied over! If not, did you generate an SSH keyring before installing?
  • Additionally, password authentication is disabled!