invalid argument "\"federation=kube.5yetis.net\"" for --federations="federation=kube.5yetis.net": "\"federation" not a valid federation name: ["must match the regex [a-z0-9]([-a-z0-9]*[a-z0-9])? (e.g. 'my-name' or '123-abc')"]
Usage of /kube-dns:
      --alsologtostderr[=false]: log to standard error as well as files
      --dns-port=53: port on which to serve DNS requests.
      --domain="cluster.local.": domain under which to create names
      --federations=: a comma separated list of the federation names and their corresponding domain names to which this cluster belongs. Example: "myfederation1=example.com,myfederation2=example2.com,myfederation3=example.com"
      --healthz-port=8081: port on which to serve a kube-dns HTTP readiness probe.
      --kube-master-url="": URL to reach kubernetes master. Env variables in this flag will be expanded.
      --kubecfg-file="": Location of kubecfg file for access to kubernetes master service; --kube-master-url overrides the URL part of this; if neither this nor --kube-master-url are provided, defaults to service account tokens
      --log-backtrace-at=:0: when logging hits line file:N, emit a stack trace
      --log-dir="": If non-empty, write log files in this directory
      --log-flush-frequency=5s: Maximum number of seconds between log flushes
      --logtostderr[=true]: log to standard error instead of files
      --stderrthreshold=2: logs at or above this threshold go to stderr
      --v=0: log level for V logs
      --version[=false]: Print version information and quit
      --vmodule=: comma-separated list of pattern=N settings for file-filtered logging