nixos-demo/slides/demo.md

author
Birk

Nix(OS)

a introduction

---

What is Nix?

• a domain specific language
• a package manager
• a Linux distribution

---

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart LR
    A(Nix language) 
    B(Nix package manager)
    C(NixOS)
    D(macOS)
    E(Debian)
    F(Software/User config)
    G(Git)
    H(File)
    A-->B--->C & D & E---->F --> G & H

---

Demo

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart TD
        B(<b>Disk & OS Installation)
        C(<b>Desktop)
        D(Nextcloud server)
        E(nspawn container)
        F(Gitlab server)
        G(Podman container)
        H(Forgejo)
        I(MicroVM)
        J(Kubernetes)
        K(Splunk)
        B--> D & E & G & I
        B-->C
        E-->F
        G-->H
        I-->J-->K

beancloud.software.desktop = true;

---

History

• 2003: a declarative programming language
• 2008: first stable NixOS version
• 2014: 10.000 packages
• 2019: Flakes
• 2025: 120.000 packages

---

Features

• declarative configuration (20.000 options)
• package count (120.000 + third party)
• versioned config in Git and on the installed NixOS
• development community on Github and others

---

Infrastructure

• nixpkgs on Github
• nix language on Github
• Binary cache for built packages
• CI server
• Build status page
• ...

---

Nextcloud

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart TD
        A(Disk & OS Installation)
        B(<b>Nextcloud server)
        C(MariaDB)
        D(nginx)
        E(php-fm)
        F(Redis)
        A--> C & D & E & F --> B

beancloud.software.nextcloud.server.enable = true;

---

Gitlab

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart LR
        A(<b>Disk & OS Installation)
        B(nspawn container)
        C(NixOS)
        D(<b>Gitlab server)
        E[Postgres]
        F[nginx]
        A --> B --> C --> E & F --> D

beancloud.software.gitlab = true;

---

Forgejo

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart LR
        A(<b>Disk & OS Installation)
        B(Podman container)
        C(<b>Forgejo)
        D[virtualisation.oci-containers.containers.forgejo-frontend.image=codeberg.org/forgejo/forgejo:11.0.3-rootless]
        E[forgejo-backend.image=docker.io/library/mariadb:11.8.2]
        A --> B --> D & E --> C

beancloud.software.forgejo = true;

---

Splunk

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart LR
    subgraph pc-demo1
        direction LR
        B(<b>Disk & OS Installation)
        subgraph k8s
            direction LR
            I("MicroVM(NixOS)")
            J(Kubernetes)
            subgraph containerd
                direction LR
                L(Container)
                K(<b>Splunk)
            end
        end
    end
    B--> I --> J --> L --> K

beancloud.software.splunk = true;

---

Unexpected stuff

• Flakes are not stable yet, but everybody uses them
• Documentation quality has room for improvement
• Additional efforts for secrets management
• Does not follow Linux Filesystem Hierarchy Standard
• Commercial software usage can be tricky or impossible