下载k8s源码

设置GOPATH环境变量

go env -w GO111MODULE=auto
cd $GOPATH
mkdir -p src/k8s.io
cd src/k8s.io
git clone https://github.com/kubernetes/kubernetes.git
cd kubernetes
git checkout release-1.15

设置Goland
File -> Settings -> GO -> GOPATH
勾选 Use GOPATH that's defined in system environment
Project GOPATH -> + -> 选择 kubernetes 目录下的 staging/src