My original goal is to understand the source code of gRPC-go. When researching the source code, I found a lot of coding skills/design which deserved to be noted for later reference.

Gradually, as more chapter finished, it becomes "Understanding gRPC-go": the code analysis book. All content are golang and gRPC-go related.

Get a quick glimpse from the following diagram. See Balancer and Resolver API for detail.

Done:

• 2021/03/29 xDS protocol - LDS/RDS is done
• 2021/04/06 xDS protocol - CDS/EDS is done.
• 2021/03/19 Send Request is completely rewritten.
• 2021/03/19 Send Response is completely rewritten.
• 2021/03/28 Client dial is completely rewritten.
• 2021/03/18 The transport is done. This chapter provide whole picture from the view of transport.
• 2021/04/03 xDS wrappers is done. The xDS class diagram for main type.
• 2021/04/06 XDS picker is done. How to choose the endpoint during RPC calling?

Plan:

• Stream dial, Stream request and response.
• Load reporting service
• RPC filter

• Client Dial
• Send Request
• Send Response
• Request parameters
• controlBuffer, loopyWriter and framer
• The transport
• Interceptor
• Authentication
• Load Balancing - Client
• xDS protocol - LDS/RDS
• xDS protocol - CDS/EDS

The following books help me to build a solid foundation for HTTP2 and gRPC. They answer a lot of questions about Why, What and some part of How, while gSkills purely focus on How to implement them in gRPC.

• HTTP2
  • Learning HTTP/2
  • HTTP/2 in Action
• gRPC
  • gRPC: Up and Running
  • gRPC doc

The following articles are very helpful to understand envoy. The official Introduction is not easy to understand, full of terminology, too much details to easily get distracted.

• Envoy introduction
  • Introduction to modern network load balancing and proxying
  • Announcing Envoy: C++ L7 proxy and communication bus
  • Anatomy of envoy proxy: the architecture of envoy and how it works
• Envoy data plane and control plane
  • The universal data plane API
  • Service mesh data plane vs. control plane
• Envoy internal
  • Envoy hot restart
  • Envoy threading model
• Envoy proto3 <> JSON <> YAML
  • Dynamic extensibility and Protocol Buffers
  • Evolving a Protocol Buffer canonical API
• Envoy and gRPC-Web
  • Envoy and gRPC-Web: a fresh new alternative to REST

Please read the LICENSE for more details.