Add kube_vip_lb_fwdmethod option for kube-vip (#10762)

Signed-off-by: tu1h <lihai.tu@daocloud.io>

docs/kube-vip.md

@@ -70,3 +70,9 @@ If using [control plane load-balancing](https://kube-vip.io/docs/about/architect
 ```yaml
 kube_vip_lb_enable: true
 ```
+
+In addition, [load-balancing method](https://kube-vip.io/docs/installation/flags/#environment-variables) could be changed:
+
+```yaml
+kube_vip_lb_fwdmethod: masquerade
+```

roles/kubernetes/node/defaults/main.yml

@@ -86,6 +86,7 @@ kube_vip_bgppeers:
 kube_vip_address:
 kube_vip_enableServicesElection: false
 kube_vip_lb_enable: false
+kube_vip_lb_fwdmethod: local
 
 # Requests for load balancer app
 loadbalancer_apiserver_memory_requests: 32M

roles/kubernetes/node/templates/manifests/kube-vip.manifest.j2

@@ -77,6 +77,10 @@ spec:
 {% if kube_vip_lb_enable %}
     - name: lb_enable
       value: "true"
+{% endif %}
+{% if kube_vip_lb_fwdmethod %}
+    - name: lb_fwdmethod
+      value: {{ kube_vip_lb_fwdmethod | string | to_json }}
 {% endif %}
     image: {{ kube_vip_image_repo }}:{{ kube_vip_image_tag }}
     imagePullPolicy: {{ k8s_image_pull_policy }}