下载源码并切换到需要debug的分支

git clone git@github.com:kubernetes/kubernetes.git
git checkout -b v1.25 remotes/origin/release-1.25
cd kubernetes

编译源码

• 执行：make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1会编译所有的组件

  • 网上参考了很多文章都是，需要修改hack/lib/golang.sh，实际上加上DBG=1这个参数，并不需要。Makefile开头就已经说明
  • 编译出来的二进制文件保存在：_output/local/bin目录下

    • 	[root@k8s-master1 kubernetes]# make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1
      	+++ [1205 14:29:27] Verifying Prerequisites....
      	Makefile.generated_files:61: .make/go-pkgdeps.mk: No such file or directory
      	+++ [1205 14:29:30] Building go targets for linux/amd64
      	    k8s.io/kubernetes/hack/make-rules/helpers/go2make (non-static)
      	+++ [1205 14:29:45] Building go targets for linux/amd64
      	    k8s.io/code-generator/cmd/prerelease-lifecycle-gen (non-static)
      	+++ [1205 14:29:51] Generating prerelease lifecycle code for 27 targets
      	+++ [1205 14:29:55] Building go targets for linux/amd64
      	    k8s.io/code-generator/cmd/deepcopy-gen (non-static)
      	+++ [1205 14:29:57] Generating deepcopy code for 242 targets
      	+++ [1205 14:30:12] Building go targets for linux/amd64
      	    k8s.io/code-generator/cmd/defaulter-gen (non-static)
      	+++ [1205 14:30:14] Generating defaulter code for 95 targets
      	+++ [1205 14:30:34] Building go targets for linux/amd64
      	    k8s.io/code-generator/cmd/conversion-gen (non-static)
      	+++ [1205 14:30:35] Generating conversion code for 132 targets
      	+++ [1205 14:31:12] Building go targets for linux/amd64
      	    k8s.io/kube-openapi/cmd/openapi-gen (non-static)
      	+++ [1205 14:31:29] Generating openapi code for KUBE
      	+++ [1205 14:32:27] Generating openapi code for AGGREGATOR
      	+++ [1205 14:32:30] Generating openapi code for APIEXTENSIONS
      	+++ [1205 14:32:33] Generating openapi code for CODEGEN
      	+++ [1205 14:32:36] Generating openapi code for SAMPLEAPISERVER
      	+++ [1205 14:32:40] Building go targets for linux/amd64
      	    k8s.io/kubernetes/cmd/kube-proxy (static)
      	    k8s.io/kubernetes/cmd/kube-apiserver (static)
      	    k8s.io/kubernetes/cmd/kube-controller-manager (static)
      	    k8s.io/kubernetes/cmd/kubelet (non-static)
      	    k8s.io/kubernetes/cmd/kubeadm (static)
      	    k8s.io/kubernetes/cmd/kube-scheduler (static)
      	    k8s.io/component-base/logs/kube-log-runner (static)
      	    k8s.io/kube-aggregator (non-static)
      	    k8s.io/apiextensions-apiserver (non-static)
      	    k8s.io/kubernetes/cluster/gce/gci/mounter (non-static)
      	    k8s.io/kubernetes/cmd/kubectl (static)
      	    k8s.io/kubernetes/cmd/kubectl-convert (non-static)
      	    k8s.io/kubernetes/cmd/gendocs (non-static)
      	    k8s.io/kubernetes/cmd/genkubedocs (non-static)
      	    k8s.io/kubernetes/cmd/genman (non-static)
      	    k8s.io/kubernetes/cmd/genyaml (non-static)
      	    k8s.io/kubernetes/cmd/genswaggertypedocs (non-static)
      	    k8s.io/kubernetes/cmd/linkcheck (non-static)
      	    github.com/onsi/ginkgo/v2/ginkgo (non-static)
      	    k8s.io/kubernetes/test/e2e/e2e.test (test)
      	    k8s.io/kubernetes/test/conformance/image/go-runner (non-static)
      	    k8s.io/kubernetes/cmd/kubemark (static)
      	    github.com/onsi/ginkgo/v2/ginkgo (non-static)
      	    k8s.io/kubernetes/test/e2e_node/e2e_node.test (test)
      

  • 验证编译出来的二进制文件可以使用以下两种命令验证是否能够debug：
    • 1、objdump --syms _output/bin/kubelet
      • 
      • 
    • 2、file _output/bin/kubelet
      • 
    • 3、dlv exec _output/bin/kubelet
      • 
  • 如果需要编译特定组件，那么需要执行make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make WHAT=cmd/<component>，以下是几个重要组件的单独编译命令
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kube-apiserver
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kube-controller-manager
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kube-proxy
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kube-scheduler
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kubeadm
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kubectl
    • make clean && KUBE_BUILD_PLATFORMS=linux/amd64 make all DBG=1 WHAT=cmd/kubelet
  • 本地运行K8S，执行./heak/local-up-cluster.up

• delve启动代码

  • dlv --listen=:12345 --headless=true --api-version=2 --accept-multiclient exec /usr/local/bin/kubelet -- <kubelet的启动参数>

• IDEA连接，开始debug

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