I was running the last phase of Calico installation in Kubernetes, found the following error, kindly let me know what is the issue causes…
sudo kubeadm join 10.128.15.228:6443 --token cqb8vy.iicmmqrb1m8u9cob --discovery-token-ca-cert-hash sha256:79748a56f603e6cc57f67bf90b7db5aebe090107d540d6cc8a8f65b785de7543
[preflight] Running pre-flight checks
[WARNING Hostname]: hostname “illchn-static-X.X.X.X.vsnl.net.in” could not be reached
[WARNING Hostname]: hostname “illchn-static-X.X.X.X.vsnl.net.in”: lookup illchn-static-X.X.X.X.vsnl.net.in on 8.8.8.8:53: no such host
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR DirAvailable–etc-kubernetes-manifests]: /etc/kubernetes/manifests is not empty
[ERROR FileAvailable–etc-kubernetes-kubelet.conf]: /etc/kubernetes/kubelet.conf already exists
[ERROR Port-10250]: Port 10250 is in use
[ERROR FileAvailable–etc-kubernetes-pki-ca.crt]: /etc/kubernetes/pki/ca.crt already exists
[preflight] If you know what you are doing, you can make a check non-fatal with --ignore-preflight-errors=...
To see the stack trace of this error execute with --v=5 or higher