What is command to find detailed information about Kubernetes master(s) using kubectl?

kubernetes kubectl
Kenny Ho picture Kenny Ho · Jul 6, 2016 · Viewed 90.3k times · Source

Let say I want to find the kubelet and apiserver version of my k8s master(s), what's the best way to do it?

I am aware of the following commands:

kubectl cluster-info

which only shows the endpoints.

kubectl get nodes; kubectl describe node <node>;

which shows very detail information but only the nodes and not master.

There's also

kubectl version

but that only shows the kubectl version and not the kubelet or apiserver version.

What other commands can I use to identify the properties of my cluster?

Answer

Alex Robinson picture Alex Robinson · Jul 6, 2016

kubectl version also shows the apiserver version. For example, this is the output when I run it:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"2", GitVersion:"v1.2.4", GitCommit:"3eed1e3be6848b877ff80a93da3785d9034d0a4f", GitTreeState:"clean"}
Server Version: version.Info{Major:"1", Minor:"2", GitVersion:"v1.2.4", GitCommit:"3eed1e3be6848b877ff80a93da3785d9034d0a4f", GitTreeState:"clean"}

The second line ("Server Version") contains the apiserver version. There isn't a way to get the master's kubelet version if it isn't registered as one of the nodes (which it isn't if it isn't showing up in kubectl get nodes), but in most deployments it'll be the same version as the apiserver.

Related questions

Restart container within pod

I have a pod test-1495806908-xn5jn with 2 containers. I'd like to restart one of them called container-test. Is it possible to restart a single container within a pod and how? If not, how do I restart the pod? The …

Read More
Kubernetes pod gets recreated when deleted

I have started pods with command $ kubectl run busybox --image=busybox --restart=Never --tty -i --generator=run-pod/v1 Something went wrong, and now I can't delete this Pod. I tried using the methods described below but the Pod keeps being …

Read More
kubectl apply vs kubectl create?

What I understood by the documentation is that: kubectl create = Creates a new k8s resource in the cluster kubectl replace = Updates a resource in the live cluster kubectl apply = If I want to do create + replace (Reference) My questions …

Read More