# Part 4: Using Services

This is Part 4 of a multi-part, self-paced quick start exercise.

Note  
This exercise requires MicroK8s. If you do not have these already installed and running, see " [Prerequisites](https://docs.rafay.co/learn/quickstart/kubernetes/prerequisites/)".

---

## What Will You Do

In part 4, you will:

- Use services on your cluster.

**Estimated Time**  
Estimated time for this exercise is 10 minutes. Watch a video of this exercise below.

Kubernetes 101 -Service - YouTube

---

## Using Services

Kubernetes services allow exposing an application as a network service. The service is a static IP address that can be attached to a pod. The service and the pod are separate, so if a pod dies, the service and IP address remain.

### Service YAML file

Create a service using a YAML file, which is a configuration file. You could create a YAML file from the command line, but for this exercise, you can just use a text editor. Or you can download the service YAML file from this public [Git repository](https://github.com/RafaySystems/getstarted/tree/master/kubernetes)

1. Open the Terminal.
2. Navigate to the Downloads folder.

```
   cd ./Downloads
   ```

3. Use the following command to create an empty YAML file in your Downloads folder.

```
   touch service.yaml
   ```

4. Use the nano text editor in the Terminal.

```
   nano service.yaml
   ```

5. Copy and paste the configuration below into the text editor.
6. Press **Cmd + X**, then type **Y** and press **Return** to save the service.yaml file.

1. Open the command prompt.
2. Navigate to the Downloads folder.

```
   cd ./Downloads
   ```

3. Use the following command to create an empty YAML file in your Downloads folder.

```
   copy NUL service.yaml
   ```

4. Open the service.yaml file with a text editor. For example, use Notepad++ to edit the YAML file.
5. Copy and paste the configuration below into the text editor.
6. Save the service.yaml file.

1. Open the Terminal.
2. Navigate to the Downloads folder.

```
   cd ./Downloads
   ```

3. Use the following command to create an empty YAML file in your Downloads folder.

```
   touch service.yaml
   ```

4. Use the nano text editor in the Terminal.

```
   nano service.yaml
   ```

5. Copy and paste the configuration below into the text editor.
6. Press **Ctrl + X**, then type **Y** and press **Enter** to save the service.yaml file.

---

### Add a Service

1. In the Terminal or Command Prompt, add the service to your environment using a YAML file.

```
   microk8s kubectl create -f service.yaml
   ```

2. List the services and see that development is now listed. You will need the NodePort port number. Example: 30007.

```
   microk8s kubectl get services
   ```

3. Get the IP address for the microk8s-vm. It will be an IPv4 address. Example: 192.168.64.2.

```
   multipass list
   ```

4. Test that the service is available using the IP address and the NodePort. Example: curl [http://192.168.64.2:30007](http://192.168.64.2:30007/). A message should display and include the pod name; this is from the Deployment YAML file ("Hello from...").

```
   curl http://ip-address:nodeport
   ```

---

## service.yaml

```
apiVersion: v1
kind: Service
metadata:
  name: test-service
spec:
  type: NodePort
  selector:
    app: test-pod
  ports:
  - port: 4000
    targetPort: 80
    nodePort: 30007
```