Merge pull request #378 from bogdando/issues/26

docs/ha-mode.md

inventory/group_vars/all.yml

roles/kubernetes/master/tasks/main.yml

roles/kubernetes/master/templates/kubectl-kubeconfig.yaml.j2

...tes/master/templates/manifests/kube-apiserver.manifest.j2

...r/templates/manifests/kube-controller-manager.manifest.j2

...tes/master/templates/manifests/kube-scheduler.manifest.j2

roles/kubernetes/node/templates/kubelet.j2

...ubernetes/node/templates/manifests/kube-proxy.manifest.j2

roles/kubernetes/preinstall/tasks/set_facts.yml

roles/network_plugin/calico/templates/network-environment.j2