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Metaparticle [This repo is old and deprecated, please visit https://metaparticle.io

NB: This work was an experiment. The ideas have moved on to a second implementation that you can find here:

About

Metaparticle is intended to radically simplify the process of building distributed systems. Metaparticle intends to remove much of the boilerplate associated with implementing and deploying common distributed system patterns. Metaparticle enables you to focus on your code, while allowing you to treat your architecture as code as well.

Metaparticle does this using a code as config approach to defining your infrastructure. This approach is intended to work with containerized applications regardless of the language in which those applications are written. Additionally, if you choose to code in Javascript, you can blend your code and your infrastructure in a single file.

Metaparticle works by defining service patterns, which you can instantiate via simple code. This code contains both the definition of your architecture as well as the implementation of the service itself.

Currently Metaparticle supports the following service patterns:

  • Scatter/Gather (aka Fan-Out/Fan-In)
  • Shard: Choose a replica based on a user-supplied sharding function
  • Spread: Spread load uniformly across all replicas

Without further ado, here are some examples:

Hello World

Prerequisites

Metaparticle is written for NodeJS, you need to have node and npm installed.

Instructions from NodeJS:

$ npm install metaparticle

If you want to run the Kubernetes examples below, then you also need a working Kubernetes cluster and kubectl configured correctly.

Walkthrough

There is a complete tutorial style walkthrough of the concepts behind metaparticle, starting here.

Distributed examples

The previous examples are fun, but they don't really deploy beyond a single machine. Here are instructions for using metaparticle to deploy to Kubernetes.

FAQ

Why?

Configuration and deployment has long been a central challenge of distributed system design and operations. Repeatedly people have taken the approach of defining domain specific languages (DSLs) and gradually transforming them into programming languages that are incomplete, hard to test, hard to read, lacking in idioms and proper tooling and many, many failings that make them challenging and brittle to use.

Instead, we take a code as config approach where we use a proper, fully functional idiomatic programming language as the basis for expressing the configuration of the system. Consequently, we can bring to bear the full set of tools available in that language, including: unit tests, code review, style guides, standard libraries and more. Imagine writing unit tests for your infrastructure!

Where are you going?

Plans include drinking more coffee. Also possibly writing more code.

In the off chance that I do write more code, it will likely be about the following things:

  • Incorporating services implemented in something other than node.js
  • Figuring out something about storage.

Can I help?

Absolutely! File issues, send PRs.

Can you tell me more about...?

For now you are going to have to look at the examples and read the code. More documentation is forthcoming.

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A new pattern for distributed system development

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