make kube-vip LeaderElection variables configurable (#11021)

Signed-off-by: KubeKyrie <shaolong.qin@daocloud.io>

docs/kube-vip.md

@@ -76,3 +76,11 @@ In addition, [load-balancing method](https://kube-vip.io/docs/installation/flags
 ```yaml
 kube_vip_lb_fwdmethod: masquerade
 ```
+
+If you want to adjust the parameters of [kube-vip LeaderElection](https://kube-vip.io/docs/installation/flags/#environment-variables):
+
+```yaml
+kube_vip_leaseduration: 30
+kube_vip_renewdeadline: 20
+kube_vip_retryperiod: 4
+```

roles/kubernetes/node/defaults/main.yml

@@ -87,6 +87,9 @@ kube_vip_address:
 kube_vip_enableServicesElection: false
 kube_vip_lb_enable: false
 kube_vip_lb_fwdmethod: local
+kube_vip_leaseduration: 5
+kube_vip_renewdeadline: 3
+kube_vip_retryperiod: 1
 
 # Requests for load balancer app
 loadbalancer_apiserver_memory_requests: 32M

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

@@ -48,11 +48,11 @@ spec:
     - name: vip_leaderelection
       value: "true"
     - name: vip_leaseduration
-      value: "5"
+      value: {{ kube_vip_leaseduration | string | to_json }}
     - name: vip_renewdeadline
-      value: "3"
+      value: {{ kube_vip_renewdeadline | string | to_json }}
     - name: vip_retryperiod
-      value: "1"
+      value: {{ kube_vip_retryperiod | string | to_json }}
 {% endif %}
 {% if kube_vip_bgp_enabled %}
     - name: bgp_enable