kubespray/roles/network_plugin/tasks/calico.yml

---
- name: Calico | Install calicoctl bin
  copy:
    src: "{{ local_release_dir }}/calico/bin/calicoctl"
    dest: "{{ bin_dir }}"
    mode: 0755
  notify: restart calico-node

- name: Calico | Create calicoctl symlink (needed by kubelet)
  file:
    src: /usr/local/bin/calicoctl
    dest: /usr/bin/calicoctl
    state: link

- name: Calico | Check if calico network pool has already been configured
  uri:
    url: "http://127.0.0.1:2379/v2/keys/calico/v1/ipam/v4/pool"
    return_content: yes
    status_code: 200,404
  register: calico_conf
  run_once: true
  delegate_to: "{{ groups['etcd'][0] }}"

- name: Calico | Configure calico network pool
  shell: calicoctl pool add {{ kube_pods_subnet }}
  run_once: true
  when: calico_conf.status == 404
  delegate_to: "{{ groups['etcd'][0] }}"

- name: Calico | Get calico configuration from etcd
  uri:
    url: "http://127.0.0.1:2379/v2/keys/calico/v1/ipam/v4/pool"
    return_content: yes
  register: calico_pools
  run_once: true
  delegate_to: "{{ groups['etcd'][0] }}"

- name: Calico | Check if calico pool is properly configured
  fail:
    msg: 'Only one network pool must be configured and it must be the subnet {{ kube_pods_subnet }}.
    Please erase calico configuration and run the playbook again ("etcdctl rm --recursive /calico/v1/ipam/v4/pool")'
  when: ( calico_pools.json['node']['nodes'] | length > 1 ) or 
        ( not calico_pools.json['node']['nodes'][0]['key'] | search(".*{{ kube_pods_subnet | ipaddr('network') }}.*") )
  run_once: true
  delegate_to: "{{ groups['etcd'][0] }}"

- name: Calico | Write calico-node systemd init file
  template: src=calico/calico-node.service.j2 dest=/etc/systemd/system/calico-node.service
  register: newservice
  notify:
    - reload systemd
    - restart calico-node

- name: Calico | daemon-reload
  command: systemctl daemon-reload
  when: newservice|changed
  changed_when: False

- name: Calico | Enable calico-node
  service: name=calico-node enabled=yes state=started

- name: Calico | Disable node mesh
  shell: calicoctl bgp node-mesh off
  environment:
     ETCD_AUTHORITY: "{{ groups['etcd'][0] }}:2379"
  when: peer_with_router|default(false) and inventory_hostname in groups['kube-node']

- name: Calico | Configure peering with router(s)
  shell: calicoctl node bgp peer add {{ item.router_id }} as {{ item.as }}
  environment:
     ETCD_AUTHORITY: "{{ groups['etcd'][0] }}:2379"
  with_items: peers
  when: peer_with_router|default(false) and inventory_hostname in groups['kube-node']