Get "http://127.0.0.1:10252/healthz": dial tcp 127.0.0.1:10252: connect: connection refused

solution¶

[root@k8s-master01 ~]# kubectl get cs
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"}

The reason is that the default port set by kube-controller-manager.yaml and kube-scheduler.yaml is 0, just comment it out in the file.

Execute on each master node

vim /etc/kubernetes/manifests/kube-scheduler.yaml 
# and then comment this line
# - --port=0 

Restart kubelet

view again

[root@k8s-master01 ~]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}