---
- name: Setup all hosts for installation
  hosts: kubernetes
  become: true
  tasks:
  - name: Install dependencies for docker
    apt:
      name: "{{ item }}"
      state: present
    with_items:
      - "apt-transport-https"
      - "ca-certificates"
      - "software-properties-common"
      - "cron"
      - "curl"

  - name: Get upstream docker APT GPG key
    apt_key:
      url: https://download.docker.com/linux/debian/gpg
      state: "present"

  - name: Configure upstream APT repository for Debian x86_64
    apt_repository:
      repo: "deb [arch=amd64] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} edge"
      state: "present"
      update_cache: True
    when:
      - ansible_distribution == "Debian"
      - ansible_architecture == "x86_64"

  - name: Configure upstream APT repository for Raspbian armhf
    apt_repository:
      repo: "deb [arch=armhf] https://download.docker.com/linux/{{ ansible_lsb.id | lower }} {{ ansible_distribution_release }} edge"
      state: "present"
      update_cache: True
    when:
      - ansible_lsb.id == "Raspbian"

  - name: Install Docker
    apt:
      name: "docker-ce=17.12.1~ce-0~{{ ansible_lsb.id | lower }}"
      state: "present"
      update_cache: True
      install_recommends: False

  - name: Get upstream kubernetes APT GPG key
    apt_key:
      url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
      state: "present"

  - name: Configure upstream kubernetes APT repository
    apt_repository:
      repo: "deb http://apt.kubernetes.io/ kubernetes-xenial main"
      state: "present"
      update_cache: True

  - name: Install kubeadm
    apt:
      name: "kubeadm"
      state: "present"
      update_cache: True
      install_recommends: False

  - name: Remove swapfile from /etc/fstab
    mount:
      name: swap
      fstype: swap
      state: absent

  - name: Disable swap
    command: swapoff -a
    when: ansible_swaptotal_mb > 0

- name: Set up master node
  hosts: masters
  become: true
  tasks:
  - name: Check for admin.conf from kubeadm
    stat: path=/etc/kubernetes/admin.conf
    register: admin_conf

  - set_fact:
      running: admin_conf.stat.exists

  - name: Run kubeadm if admin.conf doesn't exist
    command: kubeadm init --pod-network-cidr 10.244.0.0/16
    when: admin_conf.stat.exists == false

  - name: Create kubeadm join command
    shell: kubeadm token create --print-join-command
    register: results
    when: admin_conf.stat.exists == false
  - debug:
      var: results.stdout
    when: admin_conf.stat.exists == false
  - set_fact:
      token: "{{ results.stdout | regex_search(regexp, '\\2') | first }}"
    vars:
      regexp: '([^\s]+\s){4}([^\s]+)'
    when: admin_conf.stat.exists == false
  - debug:
      var: token
    when: admin_conf.stat.exists == false
  - set_fact:
      hash: "{{ results.stdout | regex_search(regexp, '\\2') | first }}"
    vars:
      regexp: '([^\s]+\s){6}([^\s]+)'
    when: admin_conf.stat.exists == false
  - debug:
      var: hash
    when: admin_conf.stat.exists == false

  - name: Install flannel networking for RPi
    shell: curl -sSL https://rawgit.com/coreos/flannel/v0.10.0/Documentation/kube-flannel.yml | sed "s/amd64/arm/g" | kubectl --kubeconfig=/etc/kubernetes/admin.conf create -f -
    when: 
      - ansible_lsb.id == "Raspbian"
      - admin_conf.stat.exists == false

  - name: Install flannel networking for x86_64
    shell: curl -sSL https://rawgit.com/coreos/flannel/v0.10.0/Documentation/kube-flannel.yml | kubectl --kubeconfig=/etc/kubernetes/admin.conf create -f -
    when: 
      - ansible_distribution == "Debian"
      - ansible_architecture == "x86_64"
      - admin_conf.stat.exists == false
  
  - debug: 
      msg: "kubeadm has probably already been run."
    when: admin_conf.stat.exists == true

- name: Set up worker nodes
  hosts: nodes
  become: true
  tasks:
  - name: Install kubernetes on nodes
    command: kubeadm join 192.168.11.167:6443 --token "{{ hostvars['debian.ipa.champion']['token'] }}" --discovery-token-ca-cert-hash "{{ hostvars['debian.ipa.champion']['hash'] }}"
    when: hostvars['debian.ipa.champion']['running'] == false