I have just installed a basic kubernetes cluster the manual way, to better understand the components, and to later automate this installation. I followed this guide: https://kubernetes.io/docs/getting-started-guides/centos/centos_manual_config/
The cluster is completely empty without addons after this. I've already deployed kubernetes-dashboard succesfully, however, when trying to deploy kube-dns, it fails with the log:
2017-01-11T15:09:35.982973000Z F0111 15:09:35.978104 1 server.go:55]
Failed to create a kubernetes client:
invalid configuration: no configuration has been provided
I used the following yaml template for kube-dns without modification, only filling in the cluster IP: https://coreos.com/kubernetes/docs/latest/deploy-addons.html
What did I do wrong?
Experimenting with kubedns arguments, I added --kube-master-url=http://mykubemaster.mydomain:8080 to the yaml file, and suddenly it reported in green.
How did this solve it? Was the container not aware of the master for some reason?