Create LoadBalancer services

Once MetalLB is installed you can create services of type LoadBalancer, with MetalLB able to assign them an IP address from the IP address pools configured in the system.

In the example that follows, we will create an NGINX deployment and a LoadBalancer service:

1. Create a YAML file called nginx.yaml:

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: nginx
   spec:
     selector:
       matchLabels:
         app: nginx
     template:
       metadata:
         labels:
           app: nginx
       spec:
         containers:
         - name: nginx
           image: nginx:1
           ports:
           - name: http
             containerPort: 80
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: nginx
   spec:
     ports:
     - name: http
       port: 80
       protocol: TCP
       targetPort: 80
     selector:
       app: nginx
     type: LoadBalancer
   

2. Create the deployment and service:

   kubectl apply -f nginx.yaml
   

   Example output:

   deployment.apps/nginx created
   service/nginx created
   

3. Verify the IP assigned to the NGINX service:

   kubectl get svc
   

   Example output:

   NAME         TYPE           CLUSTER-IP     EXTERNAL-IP    PORT(S)        AGE
   kubernetes   ClusterIP      10.96.0.1      <none>         443/TCP        74m
   nginx        LoadBalancer   10.96.42.228   192.168.10.0   80:34072/TCP
   20s