[installation of MetalLB using Helm]
$ helm repo add metallb https://metallb.github.io/metallb
$ helm repo update
$ helm install metallb metallb/metallb -f values.yaml

$ kubectl get configmap metallb -o yaml

[view the details of Service]
$ kubectl get service nginx
NAME    TYPE           CLUSTER-IP     EXTERNAL-IP     PORT(S)        AGE
nginx   LoadBalancer   10.21.82.141   192.168.86.10   80:30967/TCP   4m40s

[curl the endpoint]
$ curl http://192.168.86.10
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>
