kubespray/roles/network_plugin/calico/tasks/main.yml

---
- name: Calico | Check calicoctl version
  run_once: true
  set_fact:
    legacy_calicoctl: "{{ calicoctl_image_tag | version_compare('v1.0.0', '<') }}"
  tags: facts

- name: Calico | Write Calico cni config
  template:
    src: "cni-calico.conf.j2"
    dest: "/etc/cni/net.d/10-calico.conf"
    owner: kube

- name: Calico | Create calico certs directory
  file:
    dest: "{{ calico_cert_dir }}"
    state: directory
    mode: 0750
    owner: root
    group: root

- name: Calico | Link etcd certificates for calico-node
  file:
    src: "{{ etcd_cert_dir }}/{{ item.s }}"
    dest: "{{ calico_cert_dir }}/{{ item.d }}"
    state: hard
    force: yes
  with_items:
    - {s: "ca.pem", d: "ca_cert.crt"}
    - {s: "node-{{ inventory_hostname }}.pem", d: "cert.crt"}
    - {s: "node-{{ inventory_hostname }}-key.pem", d: "key.pem"}

- name: Calico | Install calicoctl container script
  template:
    src: calicoctl-container.j2
    dest: "{{ bin_dir }}/calicoctl"
    mode: 0755
    owner: root
    group: root
  changed_when: false
  notify: restart calico-node

- name: Calico | Copy cni plugins from hyperkube
  command: "{{ docker_bin_dir }}/docker run --rm -v /opt/cni/bin:/cnibindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /usr/bin/rsync -a /opt/cni/bin/ /cnibindir/"
  register: cni_task_result
  until: cni_task_result.rc == 0
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  changed_when: false
  tags: [hyperkube, upgrade]

- name: Calico | Copy cni plugins from calico/cni container
  command: "{{ docker_bin_dir }}/docker run --rm -v /opt/cni/bin:/cnibindir {{ calico_cni_image_repo }}:{{ calico_cni_image_tag }} sh -c 'cp -a /opt/cni/bin/* /cnibindir/'"
  register: cni_task_result
  until: cni_task_result.rc == 0
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  changed_when: false
  when: "{{ overwrite_hyperkube_cni|bool }}"
  tags: [hyperkube, upgrade]

- name: Calico | wait for etcd
  uri:
    url: https://localhost:2379/health
    validate_certs: no
  register: result
  until: result.status == 200 or result.status == 401
  retries: 10
  delay: 5
  delegate_to: "{{groups['etcd'][0]}}"
  run_once: true

- name: Calico | Check if calico network pool has already been configured
  command: |-
    curl \
      --cacert {{ etcd_cert_dir }}/ca.pem \
      --cert {{ etcd_cert_dir}}/admin-{{ groups['etcd'][0] }}.pem \
      --key {{ etcd_cert_dir }}/admin-{{ groups['etcd'][0] }}-key.pem \
      https://localhost:2379/v2/keys/calico/v1/ipam/v4/pool
  register: calico_conf
  delegate_to: "{{groups['etcd'][0]}}"
  run_once: true

- name: Calico | Configure calico network pool
  shell: >
    echo '{
    "kind": "ipPool",
    "spec": {"disabled": false, "ipip": {"enabled": {{ cloud_provider is defined or ipip }}},
             "nat-outgoing": {{ nat_outgoing|default(false) and not peer_with_router|default(false) }}},
    "apiVersion": "v1",
    "metadata": {"cidr": "{{ kube_pods_subnet }}"}
    }'
    | {{ bin_dir }}/calicoctl create -f -
  environment:
    NO_DEFAULT_POOLS: true
  run_once: true
  when: not legacy_calicoctl and
         ("Key not found" in calico_conf.stdout or "nodes" not in calico_conf.stdout)

- name: Calico (old) | Define ipip pool argument
  run_once: true
  set_fact:
    ipip_arg: "--ipip"
  when: (legacy_calicoctl and
         cloud_provider is defined or ipip)
  tags: facts

- name: Calico (old) | Define nat-outgoing pool argument
  run_once: true
  set_fact:
    nat_arg: "--nat-outgoing"
  when: (legacy_calicoctl and
         nat_outgoing|default(false) and not peer_with_router|default(false))
  tags: facts

- name: Calico (old) | Define calico pool task name
  run_once: true
  set_fact:
    pool_task_name: "with options {{ ipip_arg|default('') }} {{ nat_arg|default('') }}"
  when: (legacy_calicoctl and ipip_arg|default(false) or nat_arg|default(false))
  tags: facts

- name: Calico (old) | Configure calico network pool {{ pool_task_name|default('') }}
  command: "{{ bin_dir}}/calicoctl pool add {{ kube_pods_subnet }} {{ ipip_arg|default('') }} {{ nat_arg|default('') }}"
  environment:
    NO_DEFAULT_POOLS: true
  run_once: true
  when: legacy_calicoctl and
         ("Key not found" in calico_conf.stdout or "nodes" not in calico_conf.stdout)

- name: Calico | Get calico configuration from etcd
  command: |-
    curl \
      --cacert {{ etcd_cert_dir }}/ca.pem \
      --cert {{ etcd_cert_dir}}/admin-{{ groups['etcd'][0] }}.pem \
      --key {{ etcd_cert_dir }}/admin-{{ groups['etcd'][0] }}-key.pem \
      https://localhost:2379/v2/keys/calico/v1/ipam/v4/pool
  register: calico_pools_raw
  delegate_to: "{{groups['etcd'][0]}}"
  run_once: true

- set_fact:
    calico_pools: "{{ calico_pools_raw.stdout | from_json }}"
  run_once: true

- 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['node']['nodes'] | length > 1 ) or
        ( not calico_pools['node']['nodes'][0]['key'] | search(".*{{ kube_pods_subnet | ipaddr('network') }}.*") )
  run_once: true

- name: Calico | Set global as_num
  command: "{{ bin_dir}}/calicoctl config set asNumber {{ global_as_num }}"
  run_once: true
  when: not legacy_calicoctl

- name: Calico (old) | Set global as_num
  command: "{{ bin_dir}}/calicoctl bgp default-node-as {{ global_as_num }}"
  run_once: true
  when: legacy_calicoctl

- name: Calico (old) | Write calico-node systemd init file
  template:
    src: calico-node.service.legacy.j2
    dest: /etc/systemd/system/calico-node.service
  when: legacy_calicoctl
  notify: restart calico-node

- name: Calico | Write calico.env for systemd init file
  template:
    src: calico.env.j2
    dest: /etc/calico/calico.env
  when: not legacy_calicoctl
  notify: restart calico-node

- name: Calico | Write calico-node systemd init file
  template:
    src: calico-node.service.j2
    dest: /etc/systemd/system/calico-node.service
  when: not legacy_calicoctl
  notify: restart calico-node

- name: Calico | Restart calico-node if secrets changed
  command: /bin/true
  when: secret_changed|default(false) or etcd_secret_changed|default(false)
  notify: restart calico-node

- meta: flush_handlers

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

- name: Calico | Disable node mesh
  shell: "{{ bin_dir }}/calicoctl config set nodeToNodeMesh off"
  when: ((peer_with_router|default(false) or peer_with_calico_rr|default(false))
          and inventory_hostname in groups['k8s-cluster']
          and not legacy_calicoctl)
  run_once: true

- name: Calico | Configure peering with router(s)
  shell: >
   echo '{
   "kind": "bgpPeer",
   "spec": {"asNumber": "{{ item.as }}"},
   "apiVersion": "v1",
   "metadata": {"node": "{{ inventory_hostname }}", "scope": "node", "peerIP": "{{ item.router_id }}"}
   }'
   | {{ bin_dir }}/calicoctl create -f -
  with_items: "{{ peers|default([]) }}"
  when: (not legacy_calicoctl and
         peer_with_router|default(false) and inventory_hostname in groups['k8s-cluster'])

- name: Calico | Configure peering with route reflectors
  shell: >
   echo '{
   "kind": "bgpPeer",
   "spec": {"asNumber": "{{ local_as | default(global_as_num)}}"},
   "apiVersion": "v1",
   "metadata": {"node": "{{ inventory_hostname }}",
     "scope": "node",
     "peerIP": "{{ hostvars[item]["calico_rr_ip"]|default(hostvars[item]["ip"]) }}"}
   }'
   | {{ bin_dir }}/calicoctl create --skip-exists -f -
  with_items: "{{ groups['calico-rr'] | default([]) }}"
  when: (not legacy_calicoctl and
         peer_with_calico_rr|default(false) and inventory_hostname in groups['k8s-cluster']
         and hostvars[item]['cluster_id'] == cluster_id)

- name: Calico (old) | Disable node mesh
  shell: "{{ bin_dir }}/calicoctl bgp node-mesh off"
  when: ((peer_with_router|default(false) or peer_with_calico_rr|default(false))
          and inventory_hostname in groups['k8s-cluster']
          and legacy_calicoctl)
  run_once: true

- name: Calico (old) | Configure peering with router(s)
  shell: "{{ bin_dir }}/calicoctl node bgp peer add {{ item.router_id }} as {{ item.as }}"
  with_items: "{{ peers|default([]) }}"
  when: (legacy_calicoctl and
         peer_with_router|default(false) and inventory_hostname in groups['k8s-cluster'])

- name: Calico (old) | Configure peering with route reflectors
  shell: "{{ bin_dir }}/calicoctl node bgp peer add {{ hostvars[item]['calico_rr_ip']|default(hostvars[item]['ip']) }} as {{ local_as | default(global_as_num) }}"
  with_items: "{{ groups['calico-rr'] | default([]) }}"
  when: (legacy_calicoctl and
         peer_with_calico_rr|default(false) and inventory_hostname in groups['k8s-cluster']
         and hostvars[item]['cluster_id'] == cluster_id)