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title: Deploy a Rust Axum App | ||
--- | ||
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[Axum](https://docs.rs/axum/latest/axum) is a web framework for Rust that focuses on ergonomics and modularity. It is designed to work with [tokio](https://docs.rs/tokio/1.40.0/x86_64-unknown-linux-gnu/tokio/index.html) and [hyper](https://docs.rs/hyper/1.4.1/x86_64-unknown-linux-gnu/hyper/index.html). | ||
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This guide covers how to deploy an Axum app to Railway in four ways: | ||
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1. [One-click deploy from a template](#one-click-deploy-from-a-template). | ||
2. [From a GitHub repository](#deploy-from-a-github-repo). | ||
3. [Using the CLI](#deploy-from-the-cli). | ||
4. [Using a Dockerfile](#use-a-dockerfile). | ||
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Now, let's create an Axum app! 🚀 | ||
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## Create an Axum App | ||
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**Note:** If you already have an Axum app locally or on GitHub, you can skip this step and go straight to the [Deploy Axum App to Railway](#deploy-the-axum-app-to-railway). | ||
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To create a new Axum app, ensure that you have [Rust](https://www.rust-lang.org/tools/install) installed on your machine. | ||
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Run the following command in your terminal to create a new Axum app: | ||
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```bash | ||
cargo new helloworld --bin | ||
``` | ||
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The command creates a new binary-based Cargo project in a `helloworld` directory. | ||
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Next, `cd` into the directory and add `axum` and `tokio` as dependencies by running the following command: | ||
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```bash | ||
cargo add axum | ||
cargo add tokio --features full | ||
``` | ||
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This will add `axum` and `tokio` as dependencies, with `tokio` configured to use the "full" feature, which includes its complete set of capabilities. You’ll find both dependencies listed in your `Cargo.toml` file. | ||
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These dependencies are required to create a bare minimum axum application. | ||
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### Modify the Application File | ||
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Next, open the app in your IDE and navigate to the `src/main.rs` file. | ||
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Replace the content with the code below: | ||
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```rust | ||
use axum::{ | ||
routing::get, | ||
Router, | ||
}; | ||
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#[tokio::main] | ||
async fn main() { | ||
// build our application with a single route | ||
let app = Router::new().route("/", get(root)); | ||
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// Get the port number from the environment, default to 3000 | ||
let port: u16 = std::env::var("PORT") | ||
.unwrap_or_else(|_| "3000".to_string()) // Get the port as a string or default to "3000" | ||
.parse() // Parse the port string into a u16 | ||
.expect("Failed to parse PORT"); | ||
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// Create a socket address (IPv6 binding) | ||
let address = SocketAddr::from(([0, 0, 0, 0, 0, 0, 0, 0], port)); | ||
let listener = tokio::net::TcpListener::bind(&address).await.unwrap(); | ||
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// Run the app with hyper, listening on the specified address | ||
axum::serve(listener, app).await.unwrap(); | ||
} | ||
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// basic handler that responds with a static string | ||
async fn root() -> &'static str { | ||
"Hello World, from Axum!" | ||
} | ||
``` | ||
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The code above sets up a simple web server using the Axum framework and the Tokio async runtime. The server listens on the port gotten from the environment variable, `PORT` and defaults to `3000` if there's none set. | ||
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It defines one route, `/`, which is mapped to a handler function called `root`. When a GET request is made to the root path, the handler responds with the static string "Hello World, from Axum!". | ||
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The Router from Axum is used to configure the route, and `tokio::net::TcpListener` binds the server to listen for connections on all available network interfaces (address `0.0.0.0`). | ||
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The asynchronous runtime, provided by the `#[tokio::main]` macro, ensures the server can handle requests efficiently. The `axum::serve` function integrates with the Hyper server to actually process requests. | ||
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### Run the Axum App locally | ||
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Run the following command in the `helloworld` directory via the terminal: | ||
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```bash | ||
cargo run | ||
``` | ||
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All the dependencies will be installed and your app will be launched. | ||
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Open your browser and go to `http://localhost:3000` to see your app. | ||
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## Deploy the Axum App to Railway | ||
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Railway offers multiple ways to deploy your Axum app, depending on your setup and preference. | ||
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### One-Click Deploy from a Template | ||
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If you’re looking for the fastest way to get started, the one-click deploy option is ideal. | ||
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Click the button below to begin: | ||
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[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/new/template/5HAMxu) | ||
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We highly recommend that [you eject from the template after deployment](/guides/deploy#eject-from-template-repository) to create a copy of the repo on your GitHub account. | ||
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**Note:** You can also choose from a <a href="https://railway.app/templates?q=axum" target="_blank">variety of Axum templates</a> created by the community. | ||
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### Deploy from the CLI | ||
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1. **Install the Railway CLI**: | ||
- <a href="/guides/cli#installing-the-cli" target="_blank">Install the CLI</a> and <a href="/guides/cli#authenticating-with-the-cli" target="_blank">authenticate it</a> using your Railway account. | ||
2. **Initialize a Railway Project**: | ||
- Run the command below in your Axum app directory. | ||
```bash | ||
railway init | ||
``` | ||
- Follow the prompts to name your project. | ||
- After the project is created, click the provided link to view it in your browser. | ||
3. **Deploy the Application**: | ||
- Use the command below to deploy your app: | ||
```bash | ||
railway up | ||
``` | ||
- This command will scan, compress and upload your app's files to Railway. You’ll see real-time deployment logs in your terminal. | ||
4. **Verify the Deployment**: | ||
- Once the deployment completes, go to **View logs** to check if the server is running successfully. | ||
**Note:** During the deployment process, Railway will automatically [detect that it’s a Rust app](https://nixpacks.com/docs/providers/rust). | ||
5. **Set Up a Public URL**: | ||
- Navigate to the **Networking** section under the [Settings](/overview/the-basics#service-settings) tab of your new service. | ||
- Click [Generate Domain](/guides/public-networking#railway-provided-domain) to create a public URL for your app. | ||
<Image src="https://res.cloudinary.com/railway/image/upload/f_auto,q_auto/v1729880417/docs/quick-start/axum_app_service.png" | ||
alt="screenshot of the deployed Axum service" | ||
layout="responsive" | ||
width={1982} height={1822} quality={100} /> | ||
### Deploy from a GitHub Repo | ||
To deploy an Axum app to Railway directly from GitHub, follow the steps below: | ||
1. **Create a New Project on Railway**: | ||
- Go to <a href="https://railway.app/new" target="_blank">Railway</a> to create a new project. | ||
2. **Deploy from GitHub**: | ||
- Select **Deploy from GitHub repo** and choose your repository. | ||
- If your Railway account isn’t linked to GitHub yet, you’ll be prompted to do so. | ||
3. **Deploy the App**: | ||
- Click **Deploy** to start the deployment process. | ||
- Once the deployed, a Railway [service](/guides/services) will be created for your app, but it won’t be publicly accessible by default. | ||
4. **Verify the Deployment**: | ||
- Once the deployment completes, go to **View logs** to check if the server is running successfully. | ||
**Note:** During the deployment process, Railway will automatically [detect that it’s a Rust app](https://nixpacks.com/docs/providers/rust). | ||
5. **Set Up a Public URL**: | ||
- Navigate to the **Networking** section under the [Settings](/overview/the-basics#service-settings) tab of your new service. | ||
- Click [Generate Domain](/guides/public-networking#railway-provided-domain) to create a public URL for your app. | ||
### Use a Dockerfile | ||
1. Create a `Dockerfile` in the `helloworld` or Axum app's root directory. | ||
2. Add the content below to the `Dockerfile`: | ||
```docker | ||
FROM lukemathwalker/cargo-chef:latest-rust-1 AS chef | ||
# Create and change to the app directory. | ||
WORKDIR /app | ||
FROM chef AS planner | ||
COPY . ./ | ||
RUN cargo chef prepare --recipe-path recipe.json | ||
FROM chef AS builder | ||
COPY --from=planner /app/recipe.json recipe.json | ||
# Build dependencies - this is the caching Docker layer! | ||
RUN cargo chef cook --release --recipe-path recipe.json | ||
# Build application | ||
COPY . ./ | ||
RUN cargo build --release | ||
CMD ["./target/release/helloworld"] | ||
``` | ||
4. Either deploy via the CLI or from GitHub. | ||
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Railway automatically detects the `Dockerfile`, [and uses it to build and deploy the app.](/guides/dockerfiles) | ||
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**Note:** Railway supports also <a href="/guides/services#deploying-a-public-docker-image" target="_blank">deployment from public and private Docker images</a>. | ||
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This guide covers the main deployment options on Railway. Choose the approach that suits your setup, and start deploying your Axum apps seamlessly! | ||
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## Next Steps | ||
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Explore these resources to learn how you can maximize your experience with Railway: | ||
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- [Add a Database Service](/guides/build-a-database-service) | ||
- [Monitor your app](/guides/monitoring) |
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