---
# Congifure docker for k8s.
# https://kubernetes.io/docs/setup/production-environment/container-runtimes/#docker
- include_tasks: configure_docker.yml

# Install kublet, kudeadm, and kubectl
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#installing-kubeadm-kubelet-and-kubectl
- include_tasks: debian_family.yml
  when: ansible_os_family == "Debian"
- include_tasks: redhat_family.yml
  when: ansible_os_family == "RedHat"

# Configure sysctl kernel modules
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#letting-iptables-see-bridged-traffic
- include_tasks: sysctl_and_kernel_modules.yml

- name: Ensure kubelet is started and enabled at boot.
  service:
    name: kubelet
    state: started
    enabled: true
  become: true

# Disable swap
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#before-you-begin

- include_tasks: disable_swap.yml

# Pre-pull k8s status pods.
- name: Check the docker images currently on machine.
  command: docker images
  # We do this as root because the docker admin will not be able to until we
  # reset the connection. We could just as well do a reset here.
  become: true
  register: docker_images
  changed_when: false

- name: Pre-grab the container images for the static pods.
  command: kubeadm config images pull
  # We do this as root because the docker admin will not be able to until we
  # reset the connection. We could just as well do a reset here.
  become: true
  changed_when: true
  when: >
    ( kube_apiserver not in docker_images.stdout or
      kube_controller_manager not in docker_images.stdout or
      kube_scheduler not in docker_images.stdout or
      kube_proxy not in docker_images.stdout or
      etcd not in docker_images.stdout or
      coredns not in docker_images.stdout or
      pause not in docker_images.stdout )

# master
- include_tasks: master.yml
  when: kubernetes_role == 'master'

# calico
# https://projectcalico.docs.tigera.io/getting-started/kubernetes/self-managed-onprem/onpremises
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/#pod-network
- include_tasks: calico.yml
  when: kubernetes_role == 'master'

# Join nodes to cluster.
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/#join-nodes 
- include_tasks: join_nodes.yml