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https://github.com/fermyon/spin

Spin is the open source developer tool for building and running serverless applications powered by WebAssembly.
https://github.com/fermyon/spin

fermyon serverless spin webassembly

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Spin is the open source developer tool for building and running serverless applications powered by WebAssembly.

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README 

        


  
Fermyon Spin


  

    

    spin logo

  

  
Spin is a framework for building, deploying, and running fast, secure, and composable cloud microservices with WebAssembly.


      build status

      Discord




## What is Spin?



Spin is an open source framework for building and running fast, secure, and

composable cloud microservices with WebAssembly. It aims to be the easiest way

to get started with WebAssembly microservices, and takes advantage of the latest

developments in the

[WebAssembly component model](https://github.com/WebAssembly/component-model)

and [Wasmtime](https://wasmtime.dev/) runtime.



Spin offers a simple CLI that helps you create, distribute, and execute

applications, and in the next sections we will learn more about Spin

applications and how to get started.



## Getting started



See the [Install Spin](https://developer.fermyon.com/spin/install) page of the [Spin documentation](https://developer.fermyon.com/spin/index) for a detailed

guide on installing and configuring Spin, but in short run the following commands:

```bash

curl -fsSL https://developer.fermyon.com/downloads/install.sh | bash

sudo mv ./spin /usr/local/bin/spin

```



Alternatively, you could [build Spin from source](https://developer.fermyon.com/spin/contributing/).



To get started writing apps, follow the [quickstart guide](https://developer.fermyon.com/spin/quickstart/),

and then follow the

[Rust](https://developer.fermyon.com/spin/rust-components/), [JavaScript](https://developer.fermyon.com/spin/javascript-components), [Python](https://developer.fermyon.com/spin/python-components), or [Go](https://developer.fermyon.com/spin/go-components/)

language guides, and the [guide on writing Spin applications](https://developer.fermyon.com/spin/configuration/).



## Usage

Below is an example of using the `spin` CLI to create a new Spin application.  To run the example you will need to install the `wasm32-wasi` target for Rust.



```bash

$ rustup target add wasm32-wasi

```



First, run the `spin new` command to create a Spin application from a template.

```bash

# Create a new Spin application named 'hello-rust' based on the Rust http template, accepting all defaults

$ spin new --accept-defaults -t http-rust hello-rust

```

Running the `spin new` command created a `hello-rust` directory with all the necessary files for your application. Change to the `hello-rust` directory and build the application with `spin build`, then run it locally with `spin up`:



```bash

# Compile to Wasm by executing the `build` command.

$ spin build

Executing the build command for component hello-rust: cargo build --target wasm32-wasi --release

    Finished release [optimized] target(s) in 0.03s

Successfully ran the build command for the Spin components.



# Run the application locally.

$ spin up

Logging component stdio to ".spin/logs/"



Serving http://127.0.0.1:3000

Available Routes:

  hello-rust: http://127.0.0.1:3000 (wildcard)

```



That's it! Now that the application is running, use your browser or cURL in another shell to try it out:



```bash

# Send a request to the application.

$ curl -i 127.0.0.1:3000

HTTP/1.1 200 OK

foo: bar

content-length: 14

date: Thu, 13 Apr 2023 17:47:24 GMT



Hello, Fermyon         

```

You can make the app do more by editting the `src/lib.rs` file in the `hello-rust` directory using your favorite editor or IDE. To learn more about writing Spin applications see [Writing Applications](https://developer.fermyon.com/spin/writing-apps) in the Spin documentation.  To learn how to publish and distribute your application see the [Publishing and Distribution](https://developer.fermyon.com/spin/distributing-apps) guide in the Spin documentation.



For more information on the cli commands and subcommands see the [CLI Reference](https://developer.fermyon.com/common/cli-reference).



## Language Support for Spin Features



The table below summarizes the [feature support](https://developer.fermyon.com/spin/language-support-overview) in each of the language SDKs.



| Feature | Rust SDK Supported? | TypeScript SDK Supported? | Python SDK Supported? | Tiny Go SDK Supported? | C# SDK Supported? |

|-----|-----|-----|-----|-----|-----|

| **Triggers** |

| [HTTP](https://developer.fermyon.com/spin/http-trigger) | Supported | Supported | Supported | Supported | Supported |

| [Redis](https://developer.fermyon.com/spin/redis-trigger) | Supported | Not Supported | Supported | Supported | Not Supported |

| **APIs** |

| [Outbound HTTP](https://developer.fermyon.com/spin/rust-components.md#sending-outbound-http-requests) | Supported | Supported | Supported | Supported | Supported |

| [Configuration Variables](https://developer.fermyon.com/spin/variables) | Supported | Supported | Supported | Supported | Supported |

| [Key Value Storage](https://developer.fermyon.com/spin/kv-store-api-guide) | Supported | Supported | Supported | Supported | Not Supported |

| [SQLite Storage](https://developer.fermyon.com/spin/sqlite-api-guide) | Supported | Supported | Supported | Supported | Not Supported |

| [MySQL](https://developer.fermyon.com/spin/rdbms-storage#using-mysql-and-postgresql-from-applications) | Supported | Supported | Not Supported | Supported | Not Supported |

| [PostgreSQL](https://developer.fermyon.com/spin/rdbms-storage#using-mysql-and-postgresql-from-applications) | Supported | Supported | Not Supported | Supported | Supported |

| [Outbound Redis](https://developer.fermyon.com/spin/rust-components.md#storing-data-in-redis-from-rust-components) | Supported | Supported | Supported | Supported | Supported |

| [Serverless AI](https://developer.fermyon.com/spin/serverless-ai-api-guide) | Supported | Supported | Supported | Supported | Not Supported |

| **Extensibility** |

| [Authoring Custom Triggers](https://developer.fermyon.com/spin/extending-and-embedding) | Supported | Not Supported | Not Supported | Not Supported | Not Supported |



## Getting Involved and Contributing



We are delighted that you are interested in making Spin better! Thank you!



Each Monday at 2:30om UTC and 9:00pm UTC (alternating), we meet to discuss Spin issues, roadmap, and ideas in our Spin Project Meetings. Subscribe to this [Google Calendar](https://calendar.google.com/calendar/u/1?cid=c3Bpbi5tYWludGFpbmVyc0BnbWFpbC5jb20) for meeting dates.



The [Spin Project Meeting agenda](https://docs.google.com/document/d/1EG392gb8Eg-1ZEPDy18pgFZvMMrdAEybpCSufFXoe00/edit?usp=sharing) is a public document. The document contains a rolling agenda with the date and time of each meeting, the Zoom link, and topics of discussion for the day. You will also find the meeting minutes for each meeting and the link to the recording. If you have something you would like to demo or discuss at the project meeting, we encourage you to add it to the agenda.



You can find the contributing guide [here](https://developer.fermyon.com/spin/contributing).



Fermyon also hosts a Discord server, where we discuss anything Spin: [Discord server](https://discord.gg/eGN8saYqCk).



## Stay in Touch

Follow us on Twitter: [@spinframework](https://twitter.com/spinframework)



You can join the Spin community in our [Discord server](https://discord.gg/eGN8saYqCk) where you can ask questions, get help, and show off the cool things you are doing with Spin!