---
- name: Add Flannel Helm repo
  become_user: "{{ kubectl.user }}"
  when: inventory_hostname in (groups['primary'] | default([]))
  block:
    - name: Add Flannel chart repo
      shell: |
        helm repo add flannel https://flannel-io.github.io/flannel/

    - name: Install Flannel
      shell: |
        helm upgrade --install flannel flannel/flannel \
          --version {{ flannel_version }} \
          --namespace kube-flannel \
          --create-namespace \
          --set podCidr="{{ kubeadm.pod_network_cidr }}"
...