报错：
使用Kubeadm安装的K8s集群获取kube-scheduler和kube-controller-manager组件状态异常，基本上都会出现这个问题。
[root@k8s-master ~]# kubectl get cs Warning: v1 ComponentStatus is deprecated in v1.19+ NAME STATUS MESSAGE ERROR scheduler Unhealthy Get "http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused controller-manager Healthy ok etcd-0 Healthy {"health":"true","reason":""}
解决方法：
1.kube-scheduler组件
注释掉/etc/kubernetes/manifests/kube-scheduler.yaml中--port=0配置
[root@k8s-master ~]# vim /etc/kubernetes/manifests/kube-scheduler.yaml apiVersion: v1 kind: Pod metadata: creationTimestamp: null labels: component: kube-scheduler tier: control-plane name: kube-scheduler namespace: kube-system spec: containers: - command: - kube-scheduler - --authentication-kubeconfig=/etc/kubernetes/scheduler.conf - --authorization-kubeconfig=/etc/kubernetes/scheduler.conf - --bind-address=127.0.0.1 - --kubeconfig=/etc/kubernetes/scheduler.conf - --leader-elect=true #- --port=0 -----》 //注释这一行 image: registry.aliyuncs.com/google_containers/kube-scheduler:v1.22.1
2.kube-controller-manager组件
注释掉/etc/kubernetes/manifests/kube-controller-manager.yaml中--port=0配置
[root@k8s-master ~]# vim /etc/kubernetes/manifests/kube-controller-manager.yaml apiVersion: v1 kind: Pod metadata: creationTimestamp: null labels: component: kube-controller-manager tier: control-plane name: kube-controller-manager namespace: kube-system spec: containers: - command: - kube-controller-manager - --allocate-node-cidrs=true - --authentication-kubeconfig=/etc/kubernetes/controller-manager.conf - --authorization-kubeconfig=/etc/kubernetes/controller-manager.conf - --bind-address=127.0.0.1 - --client-ca-file=/etc/kubernetes/pki/ca.crt - --cluster-cidr=10.244.0.0/16 - --cluster-name=kubernetes - --cluster-signing-cert-file=/etc/kubernetes/pki/ca.crt - --cluster-signing-key-file=/etc/kubernetes/pki/ca.key - --controllers=*,bootstrapsigner,tokencleaner - --kubeconfig=/etc/kubernetes/controller-manager.conf - --leader-elect=true #- --port=0 - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
验证：
[root@k8s-master ~]# systemctl restart kubelet //重启kubelet [root@k8s-master ~]# kubectl get cs //查看状态情况（重启后需要等一下才会Healthy） Warning: v1 ComponentStatus is deprecated in v1.19+ NAME STATUS MESSAGE ERROR 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","reason":""} controller-manager Healthy ok [root@k8s-master ~]# kubectl get cs Warning: v1 ComponentStatus is deprecated in v1.19+ NAME STATUS MESSAGE ERROR etcd-0 Healthy {"health":"true","reason":""} controller-manager Healthy ok scheduler Healthy ok
可以看到现在kube-scheduler和kube-controller-manager两个组件的状态都已经变成Healthy了！
