Addons can be deployed through yaml files as well as using the addon manager. I have already installed dashboard, monitoring, DNS manually using the yaml files provided (with small modifications) in this repo.

Please note addon-manager is pretty special, You should copy all files into a directory then:

./kube-addons.sh

Btw I prefer installing addons manually instead of using addon manager.

DNS addon manual example:

Take the kubedns-controller.yaml.sed, Replace the $DNS_DOMAIN with cluster.local(you should use the domain specified in your setup here). You can also set it as a variable. Please note there are multiple occurrences in this file.

Then:

mv kubedns-controller.yaml.sed kubedns-deployement.yaml
kubectl create -f kubedns-deployement.yaml