docs: New README, two options to choose from right now (#59)
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Reviewed-on: #59 Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io> Co-committed-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
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README.md
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README.md
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# Harmony : Open Infrastructure Orchestration
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# Harmony
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## Quick demo
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[](https://git.nationtech.io/nationtech/harmony)
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[](LICENSE)
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`cargo run -p example-tui`
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**Open-source infrastructure orchestration that treats your platform like first-class code.**
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This will launch Harmony's minimalist terminal ui which embeds a few demo scores.
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Harmony unifies project scaffolding, infrastructure provisioning, application deployment, and day-2 operations in **one strongly-typed Rust codebase**. From a developer laptop to a global production cluster, a single source of truth drives the full software lifecycle.
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Usage instructions will be displayed at the bottom of the TUI.
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---
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`cargo run --bin example-cli -- --help`
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## 1 · The Harmony Philosophy
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This is the harmony CLI, a minimal implementation
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Infrastructure is essential, but it shouldn’t be your core business. Harmony is built on three guiding principles that make modern platforms reliable, repeatable, and easy to reason about.
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The current help text:
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| Principle | What it means for you |
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|-----------|-----------------------|
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| **Infrastructure as Resilient Code** | Replace sprawling YAML and bash scripts with type-safe Rust. Test, refactor, and version your platform just like application code. |
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| **Prove It Works — Before You Deploy** | Harmony uses the compiler to verify that your application’s needs match the target environment’s capabilities at **compile-time**, eliminating an entire class of runtime outages. |
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| **One Unified Model** | Software and infrastructure are a single system. Harmony models them together, enabling deep automation—from bare-metal servers to Kubernetes workloads—with zero context switching. |
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````
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Usage: example-cli [OPTIONS]
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These principles surface as simple, ergonomic Rust APIs that let teams focus on their product while trusting the platform underneath.
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Options:
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-y, --yes Run score(s) or not
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-f, --filter <FILTER> Filter query
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-i, --interactive Run interactive TUI or not
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-a, --all Run all or nth, defaults to all
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-n, --number <NUMBER> Run nth matching, zero indexed [default: 0]
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-l, --list list scores, will also be affected by run filter
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-h, --help Print help
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-V, --version Print version```
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---
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## Core architecture
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## 2 · Quick Start
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````
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## Supporting a new field in OPNSense `config.xml`
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The snippet below spins up a complete **production-grade LAMP stack** with monitoring. Swap it for your own scores to deploy anything from microservices to machine-learning pipelines.
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Two steps:
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- Supporting the field in `opnsense-config-xml`
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- Enabling Harmony to control the field
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```rust
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use harmony::{
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data::Version,
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inventory::Inventory,
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maestro::Maestro,
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modules::{
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lamp::{LAMPConfig, LAMPScore},
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monitoring::monitoring_alerting::MonitoringAlertingStackScore,
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},
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topology::{K8sAnywhereTopology, Url},
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};
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We'll use the `filename` field in the `dhcpcd` section of the file as an example.
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#[tokio::main]
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async fn main() {
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// 1. Describe what you want
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let lamp_stack = LAMPScore {
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name: "harmony-lamp-demo".into(),
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domain: Url::Url(url::Url::parse("https://lampdemo.example.com").unwrap()),
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php_version: Version::from("8.3.0").unwrap(),
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config: LAMPConfig {
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project_root: "./php".into(),
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database_size: "4Gi".into(),
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..Default::default()
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},
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};
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### Supporting the field
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// 2. Pick where it should run
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let mut maestro = Maestro::<K8sAnywhereTopology>::initialize(
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Inventory::autoload(), // auto-detect hardware / kube-config
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K8sAnywhereTopology::from_env(), // local k3d, CI, staging, prod…
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)
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.await
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.unwrap();
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As type checking if enforced, every field from `config.xml` must be known by the code. Each subsection of `config.xml` has its `.rs` file. For the `dhcpcd` section, we'll modify `opnsense-config-xml/src/data/dhcpd.rs`.
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// 3. Enhance with extra scores (monitoring, CI/CD, …)
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let mut monitoring = MonitoringAlertingStackScore::new();
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monitoring.namespace = Some(lamp_stack.config.namespace.clone());
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When a new field appears in the xml file, an error like this will be thrown and Harmony will panic :
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```
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Running `/home/stremblay/nt/dir/harmony/target/debug/example-nanodc`
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Found unauthorized element filename
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thread 'main' panicked at opnsense-config-xml/src/data/opnsense.rs:54:14:
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OPNSense received invalid string, should be full XML: ()
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maestro.register_all(vec![Box::new(lamp_stack), Box::new(monitoring)]);
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// 4. Launch an interactive CLI / TUI
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harmony_cli::init(maestro, None).await.unwrap();
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}
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```
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Define the missing field (`filename`) in the `DhcpInterface` struct of `opnsense-config-xml/src/data/dhcpd.rs`:
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```
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pub struct DhcpInterface {
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...
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pub filename: Option<String>,
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Run it:
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```bash
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cargo run
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```
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Harmony should now be fixed, build and run.
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Harmony analyses the code, shows an execution plan in a TUI, and applies it once you confirm. Same code, same binary—every environment.
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### Controlling the field
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---
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Define the `xml field setter` in `opnsense-config/src/modules/dhcpd.rs`.
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```
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impl<'a> DhcpConfig<'a> {
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...
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pub fn set_filename(&mut self, filename: &str) {
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self.enable_netboot();
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self.get_lan_dhcpd().filename = Some(filename.to_string());
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}
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...
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## 3 · Core Concepts
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| Term | One-liner |
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|------|-----------|
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| **Score<T>** | Declarative description of the desired state (e.g., `LAMPScore`). |
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| **Interpret<T>** | Imperative logic that realises a `Score` on a specific environment. |
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| **Topology** | An environment (local k3d, AWS, bare-metal) exposing verified *Capabilities* (Kubernetes, DNS, …). |
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| **Maestro** | Orchestrator that compiles Scores + Topology, ensuring all capabilities line up **at compile-time**. |
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| **Inventory** | Optional catalogue of physical assets for bare-metal and edge deployments. |
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A visual overview is in the diagram below.
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[Harmony Core Architecture](docs/diagrams/Harmony_Core_Architecture.drawio.svg)
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---
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## 4 · Install
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Prerequisites:
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* Rust
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* Docker (if you deploy locally)
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* `kubectl` / `helm` for Kubernetes-based topologies
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```bash
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git clone https://git.nationtech.io/nationtech/harmony
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cd harmony
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cargo build --release # builds the CLI, TUI and libraries
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```
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Define the `value setter` in the `DhcpServer trait` in `domain/topology/network.rs`
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```
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#[async_trait]
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pub trait DhcpServer: Send + Sync {
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...
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async fn set_filename(&self, filename: &str) -> Result<(), ExecutorError>;
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...
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```
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---
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Implement the `value setter` in each `DhcpServer` implementation.
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`infra/opnsense/dhcp.rs`:
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```
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#[async_trait]
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impl DhcpServer for OPNSenseFirewall {
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...
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async fn set_filename(&self, filename: &str) -> Result<(), ExecutorError> {
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{
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let mut writable_opnsense = self.opnsense_config.write().await;
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writable_opnsense.dhcp().set_filename(filename);
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debug!("OPNsense dhcp server set filename {filename}");
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}
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## 5 · Learning More
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Ok(())
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}
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...
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```
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* **Architectural Decision Records** – dive into the rationale
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- [ADR-001 · Why Rust](adr/001-rust.md)
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- [ADR-003 · Infrastructure Abstractions](adr/003-infrastructure-abstractions.md)
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- [ADR-006 · Secret Management](adr/006-secret-management.md)
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- [ADR-011 · Multi-Tenant Cluster](adr/011-multi-tenant-cluster.md)
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`domain/topology/ha_cluster.rs`
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```
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#[async_trait]
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impl DhcpServer for DummyInfra {
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...
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async fn set_filename(&self, _filename: &str) -> Result<(), ExecutorError> {
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unimplemented!("{}", UNIMPLEMENTED_DUMMY_INFRA)
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}
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...
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```
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* **Extending Harmony** – write new Scores / Interprets, add hardware like OPNsense firewalls, or embed Harmony in your own tooling (`/docs`).
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Add the new field to the DhcpScore in `modules/dhcp.rs`
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```
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pub struct DhcpScore {
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...
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pub filename: Option<String>,
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```
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* **Community** – discussions and roadmap live in [GitLab issues](https://git.nationtech.io/nationtech/harmony/-/issues). PRs, ideas, and feedback are welcome!
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Define it in its implementation in `modules/okd/dhcp.rs`
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```
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impl OKDDhcpScore {
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...
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Self {
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dhcp_score: DhcpScore {
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...
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filename: Some("undionly.kpxe".to_string()),
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```
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---
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Define it in its implementation in `modules/okd/bootstrap_dhcp.rs`
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```
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impl OKDDhcpScore {
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...
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Self {
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dhcp_score: DhcpScore::new(
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...
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Some("undionly.kpxe".to_string()),
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```
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## 6 · License
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Update the interpret (function called by the `execute` fn of the interpret) so it now updates the `filename` field value in `modules/dhcp.rs`
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```
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impl DhcpInterpret {
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...
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let filename_outcome = match &self.score.filename {
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Some(filename) => {
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let dhcp_server = Arc::new(topology.dhcp_server.clone());
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dhcp_server.set_filename(&filename).await?;
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Outcome::new(
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InterpretStatus::SUCCESS,
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format!("Dhcp Interpret Set filename to {filename}"),
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)
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}
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None => Outcome::noop(),
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};
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Harmony is released under the **GNU AGPL v3**.
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if next_server_outcome.status == InterpretStatus::NOOP
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&& boot_filename_outcome.status == InterpretStatus::NOOP
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&& filename_outcome.status == InterpretStatus::NOOP
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> We choose a strong copyleft license to ensure the project—and every improvement to it—remains open and benefits the entire community. Fork it, enhance it, even out-innovate us; just keep it open.
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...
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See [LICENSE](LICENSE) for the full text.
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Ok(Outcome::new(
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InterpretStatus::SUCCESS,
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format!(
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"Dhcp Interpret Set next boot to [{:?}], boot_filename to [{:?}], filename to [{:?}]",
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self.score.boot_filename, self.score.boot_filename, self.score.filename
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)
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...
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```
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---
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*Made with ❤️ & 🦀 by the NationTech and the Harmony community*
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