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Garuda

Automagically Exposing Django ORM over gRPC for microservices written in any other languages

@dhilipsiva

A bit about myself

I have no idea what I am talking about 😜

Microservices

  • I am assuming that everyone has a basic understanding of a microservice architecture
  • For the uninitiated, it is an architectural style that structures an application as a collection of loosely coupled services, which implement business capabilities. The microservice architecture enables the continuous delivery/deployment of large, complex applications. It also enables an organization to evolve its technology stack.

Implementation of microservices that I have come across

  • I am just talking about small & medium startups [The only space that I have experience with]
  • CLI, HTTP, RPC, Thrift

CLI

  • Call a command line/console application with Popen or something similar
  • Very notorious (because we have limited control over the called program)
  • Scaling is a bit tricky

HTTP

  • Build a REST / SOAP endpoint
  • Document the message exchange format (which is a manual process and might be error prone)
  • relatively easier to scale compared to CLI method

RPC & Thirft

  • Build RPC Server and clients
  • Just as easy to scale as HTTP method, but this is faster because of strongly typed messages serialize and deserialize very fast and data is smaller compared to JSON / XML
  • Relatively harder (Implementation wise) because of all the learning curve involved
  • We have well-defined Data schemas; So manual intervention is not required to communicate changes

Garuda

  • How to make the RPC Implementation relatively easier
  • Introducing Garuda
  • Automagically Exposing Django ORM over gRPC for microservices written in any other languages
  • It's done with the help of gRPC (for now). So you need to understand Protobuf, gRPC and the likes.

RPC Frameworks

  • gRPC: A high performance, open-source universal RPC framework
  • Cap'n Proto: Cap'n Proto is an insanely fast data interchange format and capability-based RPC system.

Protobuf (Which we use with gRPC)

  • Protocol Buffers are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.
message Article {
    string id = 1;
    string content = 2;
    int32 status = 3;
    string title = 4;
}

gRPC

Service Definition

service Blog {
  rpc CreateArticle (Article) returns (Article) {}
  rpc UpdateArticle (Article) returns (Article) {}
}

What's pending?

  • Documentation
  • Cap'n Proto Backend
  • Complex queries

Garuda Demo

Thanks! 🙏

https://github.com/dhilipsiva/talks

This copy is released under the MIT License

Source Code SlideShare Link

Questions:question:

http://dhilipsiva.com dhilipsiva@gmail.com