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Demonstrate "createNodePort" with an example #201

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Demonstrate "createNodePort" with an example #201

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31 changes: 31 additions & 0 deletions content/documentation/pages/1-installation/3-kubernetes/2-helm.md
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Expand Up @@ -813,6 +813,37 @@ shows:
deployer.<app>.kubernetes.deploymentLabels=myLabelName:myLabelValue,myLabelName2:myLabelValue2
```

### NodePort

Applications are deployed using a `Service` type of [ClusterIP](https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types) which is the default Kubernetes `Service` type if not defined otherwise.
`ClusterIP` services are only reachable from within the cluster itself.

To expose the deployed application to be available externally, one option is to use `NodePort`.
See the [NodePort](https://kubernetes.io/docs/concepts/services-networking/service/#nodeport) documentation for more information.

The following example shows how you can individually configure applications using Kubernetes assigned ports:

```properties
deployer.<app>.kubernetes.createNodePort=true
```

Replace `<app>` with the name of your application.

Additionally, you can define the port to use for the `NodePort` `Service` as shown below:

```properties
deployer.<app>.kubernetes.createNodePort=31101
```

Replace `<app>` with the name of your application and the value of `31101` with your desired port.

<!--NOTE-->

When defining the port manually, the port must not already be in use and within the defined `NodePort` range.
Per [NodePort](https://kubernetes.io/docs/concepts/services-networking/service/#nodeport) the default port range is 30000-32767.

<!--END_NOTE-->

## Monitoring

To learn more about the monitoring experience in Data Flow using Prometheus running on Kubernetes, please refer to the [Stream Monitoring](%currentPath%/feature-guides/streams/monitoring/#kubernetes) feature guide.