【K8s故障排查】kubectl get componentstatuses 命令執行問題

K8s版本：1.20.8

問題描述：

# kubectl get componentstatuses
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS      MESSAGE                                                                                       ERROR
controller-manager   Unhealthy   Get "http://127.0.0.1:10252/healthz": dial tcp 127.0.0.1:10252: connect: connection refused
scheduler            Unhealthy   Get "http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused
etcd-0               Healthy     {"health":"true"}

解決辦法：

出現這種情況是kube-controller-manager.yaml和kube-scheduler.yaml設置的默認端口是0，在配置文件中注釋掉“- --port=0”並重啟服務就可以了。（每台master節點都要執行操作）

正常狀態如下：

# kubectl get componentstatuses
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-0               Healthy   {"health":"true"}