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

---

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)
• Development community on Github and other hosters

---

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
        B(Disk & OS Installation)
        C[services.nextcloud.enable=true]
        D(<b>Nextcloud server)
        E[services.nextcloud.package=nextcloud30]
        B--> D
        D-->C & E

---

Gitlab

%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
flowchart TD
        B(<b>Disk & OS Installation)
        E(nspawn container)
        F(<b>Gitlab server)
        G[services.gitlab.enable=true]
        H[services.gitlab.backup.startAt=03:00]
        I[services.nginx.enable=true]
        B--> E --> F
        F-->G & H & I

---

Forgejo

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

---

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

---

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