feat: add flannel options

defaults/main.yml

@@ -30,6 +30,8 @@ k3s_server_cluster_dns: "10.43.0.10"
 k3s_server_nodes:
   - "{{ ansible_hostname }}"
 k3s_server_flannel_backend_enabled: True
+k3s_flannel_ipv6_masq_enabled: False
+# @var k3s_flannel_external_ip:value: $ "_unset_"
 k3s_server_network_policy_enabled: True
 k3s_server_cloud_controller_enabled: True
 k3s_server_kube_proxy_enabled: True

templates/etc/rancher/k3s/config.yaml.j2

@@ -43,6 +43,13 @@ kube-controller-manager-arg:
 {% endif %}
 {% if not k3s_server_flannel_backend_enabled | bool %}
 flannel-backend: "none"
+{% else %}
+{% if k3s_flannel_ipv6_masq_enabled | bool %}
+flannel-ipv6-masq: True
+{% endif %}
+{% if k3s_flannel_external_ip is defined %}
+flannel-external-ip: "{{ k3s_flannel_external_ip }}"
+{% endif %}
 {% endif %}
 {% if not k3s_server_cloud_controller_enabled | bool %}
 disable-cloud-controller: True