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

---
- name: "Check vars defined correctly"
  assert:
    that:
      - "calico_pool_name is defined"
      - "calico_pool_name | match('^[a-zA-Z0-9-_\\\\.]{2,63}$')"
      - "ipip_mode is defined"
      - "ipip_mode in ['Always', 'CrossSubnet', 'Never']"
    msg: "Check variable definitions seems something is wrong"
  run_once: yes

- name: "Get current version of calico cluster version"
  shell: "{{ bin_dir }}/calicoctl version  | grep 'Cluster Version:' | awk '{ print $3}'"
  register: calico_version_on_server
  run_once: yes
  delegate_to: "{{ groups['kube-master'][0] }}"

- name: "Determine if calico upgrade is needed"
  block:
    - name: "Check that calico version is enough for upgrade"
      assert:
        that:
          - calico_version_on_server.stdout is version('v2.6.5', '>=')
        msg: "Your version of calico is not fresh enough for upgrade"
      when: calico_upgrade_enabled

    - name: "Set upgrade flag when version needs to be updated"
      set_fact:
        calico_upgrade_needed: True
      when:
        - calico_version_on_server.stdout is version('v2.6.5', '>=')
        - calico_version_on_server.stdout is version('v3.0.0', '<')

  when:
    - 'calico_version_on_server.stdout is defined'
    - 'calico_version_on_server.stdout != ""'
    - inventory_hostname == groups['kube-master'][0]
  run_once: yes