Name Resolution

This directory contains the implementation of gRPC's name resolution framework.

Overarching Purpose

The name resolution framework provides a pluggable mechanism for resolving a logical name into a list of network addresses. This is a key component of gRPC's load balancing and failover systems.

Files and Subdirectories

  • resolver.h / resolver.cc: Defines the core Resolver class, which is the main interface for name resolution.
  • resolver_factory.h: Defines the ResolverFactory class, which is used to create Resolver instances.
  • resolver_registry.h / resolver_registry.cc: Defines a registry for ResolverFactory instances.
  • dns/: An implementation of name resolution that uses DNS.
  • fake/: A fake implementation of name resolution for testing.
  • google_c2p/: An implementation of name resolution that is specific to Google's C2P infrastructure.
  • sockaddr/: An implementation of name resolution that uses a list of socket addresses.
  • xds/: An implementation of name resolution that uses XDS.

Notes

  • The name resolution framework is a key component of gRPC's networking infrastructure.
  • It provides a flexible and extensible way to add new name resolution mechanisms to gRPC.
  • The Resolver interface is designed to be simple and easy to implement, which makes it easy to add support for new name resolution mechanisms.