add kube-vip as a service load balancer (#432)

* add kube-vip as a service load balancer

* add molecule scenario kube-vip

---------

Co-authored-by: Techno Tim <timothystewart6@gmail.com>

roles/k3s_server/templates/kubevip.yaml.j2

@@ -0,0 +1,13 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: kubevip
+  namespace: kube-system
+data:
+{% if kube_vip_lb_ip_range is string %}
+{# kube_vip_lb_ip_range was used in the legacy way: single string instead of a list #}
+{#   => transform to list with single element #}
+{% set kube_vip_lb_ip_range = [kube_vip_lb_ip_range] %}
+{% endif %}
+  range-global: {{ kube_vip_lb_ip_range | join(',') }}

roles/k3s_server/templates/vip.yaml.j2

@@ -43,7 +43,7 @@ spec:
         - name: vip_ddns
           value: "false"
         - name: svc_enable
-          value: "false"
+          value: "{{ 'true' if kube_vip_lb_ip_range is defined else 'false' }}"
         - name: vip_leaderelection
           value: "true"
         - name: vip_leaseduration