# Homelab

```diff
! ⚠️ WORK IN PROGRESS
```

## Overview

### Hardware

![Hardware](https://user-images.githubusercontent.com/27996771/98970963-25137200-2543-11eb-8f2d-f9a2d45756ef.JPG)

- 4 nodes of NEC SFF `PC-MK26ECZDR` (Japanese version of the ThinkCentre M700):
  - CPU: `Intel Core i5-6600T @ 2.70GHz`
  - RAM: `16GB`
  - SSD: `128GB`
- TP-Link `TL-SG108` switch:
  - Ports: `8`
  - Speed: `1000Mbps`

### Technology stack

<table>
  <tr>
    <td align="center"><a><img src="https://simpleicons.org/icons/ansible.svg" width="50px;"/><br/>Ansible</td>
    <td align="center"><a><img src="https://www.docker.com/sites/default/files/d8/2019-07/Moby-logo.png" width="50px;"/><br/>Docker</td>
    <td align="center"><a><img src="https://avatars.githubusercontent.com/u/75713131?s=200&v=4" width="50px;"/><br/>Rocky Linux</td>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/k3s/icon/color/k3s-icon-color.svg" width="50px;"/><br/>K3s</td>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/kubernetes/icon/color/kubernetes-icon-color.svg" width="50px;"/><br/>Kubernetes</td>
  </tr>
  <tr>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/argo/icon/color/argo-icon-color.svg" width="50px;"/><br/>ArgoCD</td>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/helm/icon/color/helm-icon-color.svg" width="50px;"/><br/>Helm</td>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/longhorn/icon/color/longhorn-icon-color.svg" width="50px;"/><br/>Longhorn</td>
    <td align="center"><a><img src="https://cncf-branding.netlify.app/img/projects/prometheus/icon/color/prometheus-icon-color.svg" width="50px;"/><br/>Prometheus</td>
    <td align="center"><a><img src="https://simpleicons.org/icons/vault.svg" width="50px;"/><br/>Vault</td>
  </tr>
  <tr>
    <td align="center"><a><img src="https://upload.wikimedia.org/wikipedia/commons/b/bb/Gitea_Logo.svg" width="50px;"/><br/>Gitea</td>
    <td align="center"><a><img src="https://avatars.githubusercontent.com/u/47602533?s=200&v=4" width="50px;"/><br/>Tekton</td>
    <td align="center"><a><img src="https://knative.dev/docs/images/logo/rgb/knative-logo-rgb.png" width="50px;"/><br/>Knative</td>
  </tr>
</table>

_This list might be outdated, please let me know if I forgot to update it._

### Provisioning flow

<!-- ![Provisioning flow](https://khuedoan.github.io/homelab/diagrams/provisioning_flow.jpg) -->

Everything is automated, I just need to run a single `make` command and it will:

- Build the `./metal` layer:
  - Create an ephemeral, stateless PXE server
  - Install Linux on all servers in parallel
  - Build a Kubernetes cluster (based on k3s)
- Build the `./bootstrap` layer:
  - Install ArgoCD
  - Install ApplicationSet to manage other layers (and also manage itself)

From now on, ArgoCD will do the rest:

- Build the `./system` layer (storage, networking, monitoring, etc)
- Build the `./platform` layer (Gitea, Vault, SSO, etc)
- Build the `./apps` layer: (Syncthing, Jellyfin, etc)

Please visit the [Provisioning flow document](https://khuedoan.github.io/homelab/deployment/provisioning_flow.html) to learn more.

## Get Started

### Harware requirements

Any modern `x86_64` computer(s) should work, you can use old PCs, laptops or servers.
A total of 3 or more nodes is recommended for high availability.

To view the detailed requirements, please visit the [Hareware requirements document](https://khuedoan.github.io/homelab/deployment/hardware_requirements.html).

### Prerequisite

For the controller (your laptop or desktop):

- SSH keys in `~/.ssh/{id_ed25519,id_ed25519.pub}` (you can generate it with `ssh-keygen -t ed25519`)
- Docker with `host` networking driver (which means [only Docker on Linux hosts](https://docs.docker.com/network/host/), you can use a Linux virtual machine with bridged networking if you're on macOS or Windows)

For bare metal nodes:

- PXE IPv4 enabled
- Wake-on-LAN enabled and boot to network mode by default if turned on via Wake-on-LAN
- Secure boot disabled (optional, depending on the OS)
- Note their MAC addresses

To view the detailed instruction, please visit the [Prerequisite document](https://khuedoan.github.io/homelab/deployment/prerequisite.html).

### Configurations

Change these configuration files to match your hardware and network setup:

- [Bare metal nodes settings](./metal/hosts.yml) (IP, MAC...)
- [OS settings](./metal/group_vars/all.yml) (PXE, network...)

To view the detailed instruction, please visit the [Configuration document](https://khuedoan.github.io/homelab/deployment/configuration.html).

### Build

You can install all the tools manually, or you can use the convenience tools container:

```sh
make tools
```

Then build the homelab:

```sh
make
```

If you encounter any issue, please visit [Trouble shooting guide](https://khuedoan.github.io/homelab/troubleshooting/README.html)

## Roadmap

See [roadmap](https://khuedoan.github.io/homelab/roadmap.html) and [open issues](https://github.com/khuedoan/homelab/issues) for a list of proposed features and known issues.

## Contributing

Any contributions you make are greatly appreciated (feature, bug fixes, documentation, grammar or typo fix...).

## License

Distributed under the GPLv3 License. See `LICENSE` for more information.

## Acknowledgements

- ArgoCD usage in [my coworker's homelab](https://github.com/locmai/humble)
- [README template](https://github.com/othneildrew/Best-README-Template)
- [Run the same Cloudflare Tunnel across many `cloudflared` processes](https://developers.cloudflare.com/cloudflare-one/tutorials/many-cfd-one-tunnel)
- [MAC address environment variable in GRUB config](https://askubuntu.com/questions/1272400/how-do-i-automate-network-installation-of-many-ubuntu-18-04-systems-with-efi-and)
- [Official k3s systemd service file](https://github.com/k3s-io/k3s/blob/master/k3s.service)