check calico ipv6 (#8738)

* check calico ipv6

* just check ipip mode for ipv6

roles/network_plugin/calico/defaults/main.yml

@@ -10,6 +10,7 @@ calico_ipv4pool_ipip: "Off"
 calico_ipip_mode: Never  # valid values are 'Always', 'Never' and 'CrossSubnet'
 calico_vxlan_mode: Always  # valid values are 'Always', 'Never' and 'CrossSubnet'
 
+# Calico doesn't support ipip tunneling for the IPv6.
 calico_ipip_mode_ipv6: Never
 calico_vxlan_mode_ipv6: Never
 calico_pool_blocksize_ipv6: 116

roles/network_plugin/calico/tasks/check.yml

@@ -173,3 +173,13 @@
     - typha_enabled
   run_once: True
   delegate_to: "{{ groups['kube_control_plane'][0] }}"
+
+- name: "Check ipip mode is Nerver for calco ipv6"
+  assert:
+    that:
+      - "calico_ipip_mode_ipv6 in ['Never']"
+    msg: "Calico doesn't support ipip tunneling for the IPv6"
+  when:
+    - enable_dual_stack_networks
+  run_once: True
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"