---
- name: Copy necessary files to worker nodes
  hosts: workers
  vars:
    kubernetes_files:
      - ca.pem
    kubelet_files:
      - kube-worker.kubeconfig
    kube_proxy_files:
      - kube-proxy.kubeconfig
    workers:
      - debian-k8s-node1
      - debian-k8s-node2
  become: true
  tasks:
  - name: Create the var lib kubernetes directory
    file:
      path: /var/lib/kubernetes
      state: directory
  - name: Create the var lib kubelet directory
    file:
      path: /var/lib/kubelet
      state: directory
  - name: Create the var lib kube-proxy directory
    file:
      path: /var/lib/kube-proxy
      state: directory
  - name: Copy the files to kubernetes directory
    copy:
      src: /var/tmp/kubernetes/{{ item }}
      dest: /var/lib/kubernetes/{{ item }}
      mode: preserve
    with_items:
      - "{{ kubernetes_files }}"
  - name: Copy kubeconfig file to the kubelet directory
    copy:
      src: /var/tmp/kubernetes/{{ item }}.kubeconfig
      dest: /var/lib/kubelet/kubeconfig
      mode: preserve
    with_items:
      - "{{ workers }}"
  - name: Copy worker node pem file to kubelet directory
    copy:
      src: /var/tmp/kubernetes/{{ item }}.pem
      dest: /var/lib/kubelet/{{ item }}.pem
      mode: preserve
    with_items:
      - "{{ workers }}"
  - name: Copy worker node key pem file to kubelet directory
    copy:
      src: /var/tmp/kubernetes/{{ item }}-key.pem
      dest: /var/lib/kubelet/{{ item }}-key.pem
      mode: preserve
    with_items:
      - "{{ workers }}"
  - name: Copy kube-proxy kubeconfig file to kube-proxy directory
    copy:
      src: /var/tmp/kubernetes/kube-proxy.kubeconfig
      dest: /var/lib/kube-proxy/kubeconfig
      mode: preserve

- name: Download and install the Kubernetes binaries
  hosts: workers
  become: true
  vars:
  tasks:
  - name: Install dependencies
    apt:
      name: "{{ item }}"
      state: present
    with_items:
      - "socat"
      - "conntrack"
      - "ipset"
  - name: Download and install worker binaries
    get_url:
      url: "{{ item }}"
      dest: /usr/local/bin
      mode: 0755
    with_items:
      - "https://storage.googleapis.com/kubernetes-release/release/v1.11.2/bin/linux/amd64/kubectl"
      - "https://storage.googleapis.com/kubernetes-release/release/v1.11.2/bin/linux/amd64/kube-proxy"
      - "https://storage.googleapis.com/kubernetes-release/release/v1.11.2/bin/linux/amd64/kubelet"
      - "https://storage.googleapis.com/kubernetes-the-hard-way/runsc"
  - name: Download utilities
    get_url:
      url: "{{ item }}"
      dest: /var/tmp/
    with_items:
      - "https://github.com/kubernetes-incubator/cri-tools/releases/download/v1.11.1/crictl-v1.11.1-linux-amd64.tar.gz"
      - "https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz"
      - "https://github.com/containerd/containerd/releases/download/v1.2.0-beta.2/containerd-1.2.0-beta.2.linux-amd64.tar.gz"
  - name: Download runc
    get_url: 
      url: https://github.com/opencontainers/runc/releases/download/v1.0.0-rc5/runc.amd64
      dest: /usr/local/bin/runc
      mode: 0755

  - name: Create installation directories
    file:
      path: "{{ item }}"
      state: directory
    with_items:
      - "/etc/cni/net.d"
      - "/opt/cni/bin"
      - "/var/lib/kubelet"
      - "/var/lib/kube-proxy"
      - "/var/lib/kubernetes"
      - "/var/run/kubernetes"
      - "/etc/containerd"

  - name: Extract crictl binary
    unarchive:
      remote_src: yes
      src: /var/tmp/crictl-v1.11.1-linux-amd64.tar.gz
      dest: /usr/local/bin
      mode: 0755

  - name: Extract cniplugins binaries
    unarchive:
      remote_src: yes
      src: /var/tmp/cni-plugins-amd64-v0.7.1.tgz
      dest: /opt/cni/bin
      mode: 0755

  - name: Extract containerd binaries
    unarchive:
      remote_src: yes
      src: /var/tmp/containerd-1.2.0-beta.2.linux-amd64.tar.gz
      dest: /
      mode: 0755

- name: Create the CNI configuration
  hosts: workers
  become: true
  vars:
    pod_cidr: 10.200.0.0/24
    cluster_cidr: 10.200.0.0/16
  tasks:
  - name: Create bridge.conf file
    template:
      src: templates/10_bridge.conf.j2
      dest: /etc/cni/net.d/10_bridge.conf
  - name: Create loopback file
    copy:
      src: files/99_loopback.conf
      dest: /etc/cni/net.d/99_loopback.conf

  - name: Create containerd configuration
    copy:
      src: files/config.toml
      dest: /etc/containerd/config.toml
  - name: Create containerd service file
    copy:
      src: files/containerd.service
      dest: /etc/systemd/system/containerd.service
  - name: Create kubelet-config.yaml file
    template:
      src: templates/kubelet-config.yaml.j2
      dest: /var/lib/kubelet/kubelet-config.yaml
  - name: Create the kubelet service file
    copy:
      src: files/kubelet.service
      dest: /etc/systemd/system/kubelet.service
  - name: Create the kube-proxy-config.yaml file
    template:
      src: templates/kube-proxy-config.yaml.j2
      dest: /var/lib/kube-proxy/kube-proxy-config.yaml
  - name: Create the kube-proxy.service file
    copy:
      src: files/kube-proxy.service
      dest: /etc/systemd/system/kube-proxy.service
  - name: Reload systemd configuration
    command: systemctl daemon-reload
  - name: Start and enable the worker daemons
    service:
      name: "{{ item }}"
      state: started
      enabled: true
    with_items:
      - "containerd"
      - "kubelet"
      - "kube-proxy"