I have a Kubernetes cluster running. I used:
kubeadm init --apiserver-advertise-address=192.168.20.101 --pod-network-cidr=10.244.0.0/16This is working okay. Now I'm putting this in a script and I only want to execute kubeadm init again if my cluster is not running fine. How can I check if a Kubernetes cluster is running fine? So if not I can recreate the cluster.
You can use the following command to do that:
[root@ip-10-0-1-19]# kubectl cluster-info
Kubernetes master is running at https://10.0.1.197:6443
KubeDNS is running at https://10.0.1.197:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxyIt shows that your master is running fine on particular url.
kubectl get cs
The above command would display the health of controller, scheduler and etcd as Healthy if your cluster is fine
# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-0 Healthy {"health":"true"}You should also check nodes running in the cluster.
kubectl get nodes