token must be of form '[a-z0-9]{6}.[a-z0-9]{16}

[tzutalin]

Invalid token if using kubeadm v 1.7.2

token: Invalid value: \"b6567.8d078898c4947a0d\": token [\"b6567.8d078898c4947a0d\"] was not of form [\"^([a-z0-9]{6})\\\\.([a-z0-9]{16})$\"], token: Invalid value: \"b6567.8d078898c4947a0d\": token must be of form '[a-z0-9]{6}.[a-z0-9]{16}'

[tzutalin]

I didn't dive into the root cause. I hardcode it.