Trying to run kubeadm init
[root@ts_kubernetes_setup ~]# kubeadm init
[kubeadm] WARNING: kubeadm is in alpha, please do not use it for production clusters.
[preflight] Running pre-flight checks
[preflight] WARNING: firewalld is active, please ensure ports [6443 9898 10250] are open or your cluster may not function correctly
[preflight] Some fatal errors occurred:
hostname "ts_kubernetes_setup.localdomain" must match the regex [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)* (e.g. 'example.com')
[preflight] If you know what you are doing, you can skip pre-flight checks with `--skip-preflight-checks`
[root@ts_kubernetes_setup ~]#Shows error on hostname. Can i run kudeadm on this machine?
You could use a different name other than the hostname with the --api-external-dns-names as described in the reference manual. E.g.:
kubeadm init --api-external-dns-names=kube.localThis should run just fine.
You could also change the hostname of your machine - you'll find plenty of ways to do that on SO too.