"no required module provides package" Displayed When Compiling etcd

Symptom

The error message "no required module provides package github.com/coreos/etcd/cmd/etcd: go.mod file not found" is displayed during etcd compilation.

Key Process and Cause Analysis

The GO111MODULE module is not enabled.

Conclusion and Solution

1. Enable the GO111MODULE module.

   go env -w GO111MODULE=auto

2. Compile etcd again.

   ./build