Tatsuyuki Ishi 3eef8dc8d0 Add bad hostname preflight check
Hostname must be a valid DNS name, which is checked as https://github.com/kubernetes/apimachinery/blob/master/pkg/util/validation/validation.go#L115

The situation I have encountered is that my hostname contained underscore which is disallowed and apiserver refused to start.
2018-08-20 09:09:00 +09:00
..
2018-08-19 01:23:20 +08:00