Golang in Action: How to implement a simple distributed system

1

gRPC

First, let's think about how to make nodes to communicate with each other. The most common way is API, which yet has a drawback that it requires nodes to expose their IP addresses and ports to others, which is very insecure particularly in the public network. In light of that, we chose gRPC, a popular Remote Procedure Call (RPC) framework. We won't go deep into its technical details, but it is actually a mechanism to allow remote machines to execute commands by RPC callers.

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2

Protobuf

Then we create a Protocol Buffers file node.proto, a gRPC protocol file, and enter below content.

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