error unknow flag --control-plane-endpoint

Question

I'm trying to create a bare metal multimaster kubernetes cluster. The version of kubernetes I'm working with is 1.15.12. The issue I'm running into is with the command:

kubeadm init --control-plane-endpoint "LOAD_BALANCER_DNS:LOAD_BALANCER_PORT" --upload-certs --pod-network-cidr=192.168.0.0/16

The error is that --control-plane-endpoint is unknown.

I believe in version 1.15.12 this kubeadm flag doesn't exist. Am I using the correct flag or is there a substitute that I can use for the version that I'm using (v1.15.12)?

Answer 1

You are right, that flag was implemented in Kubernetes v1.16:

kubeadm: provide --control-plane-endpoint flag for controlPlaneEndpoint (#79270)

The version you are trying to use is pretty old and so it is highly recommend for you to either:

• Upgrade your cluster

• Create a new cluster from scratch using a more recent version of Kubernetes (preferably v1.20). The kubeadm init docs can help you with it, especially the --kubernetes-version flag: Choose a specific Kubernetes version for the control plane.

Remember that things get deprecated for a reason and keeping your cluster up to date can save you a lot of trouble in the future.