11-pod-network-routes.yml

---

- name: Add pod network routes
  hosts: workers
  become: true
  gather_facts: true

  tasks:

    - name: Get pod CIDR
      uri:
        url: http://metadata.google.internal/computeMetadata/v1/instance/attributes/pod-cidr
        method: GET
        return_content: yes
        headers:
          Metadata-Flavor: "Google"
      register: workers_cidr

    - name: Get routes
      command: 'gcloud compute routes list --filter "name: kubernetes-route-{{ ansible_hostname }}"'
      register: gce_list_routes
      changed_when: false

    - name: Add routes for POD CIDR
      command: |
        gcloud compute routes create kubernetes-route-{{ ansible_hostname }} \
          --network kubernetes-the-hard-way \
          --next-hop-address {{ ansible_default_ipv4.address }} \
          --destination-range {{ workers_cidr.content }}
      when: ansible_hostname not in gce_list_routes.stdout