This tutorial covers the following end-to-end tasks required to deploy an application in a Kubernetes cluster:
- Set the Kubernetes context
- Creating a deployment
- Creating a service
- Verifying the service: port forwarding
If you have multiple Kubernetes contexts, you must set the correct context in which you want to create your application resources. Within a Kubernetes cluster, you can access the application by its internal IP address. However, if you want to make your application accessible from an outside network, you must expose the pod containing your application as a Kubernetes service.
To access the service running on your Kubernetes cluster, you can use one of the following options:
- Created a `Deployment` file using the following code, if you do not have one on your machine:
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
selector:
matchLabels:
run: my-nginx
replicas: 2
template:
metadata:
labels:
run: my-nginx
spec:
containers:
- name: my-nginx
image: nginx
ports:
- containerPort: 80
```
This YAML configuration creates a `my-nginx` deployment running two Nginx pods.
- Created a `Service` file using the following code, if you do not have one on your machine:
```yaml
apiVersion: v1
kind: Service
metadata:
name: my-nginx
labels:
run: my-nginx
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
run: my-nginx
```
This YAML configuration creates a service named `my-nginx` to expose the Nginx deployment outside the Kubernetes cluster. The service listens client requests on port `80` and then forwards them to a target port `80` on the container.
## Setting the Kubernetes context
1. Go to **Settings > Kubernetes**.
2. Set the current Kubernetes context. For example, if you want to use a Kind cluster, use the **Set as Current Context** icon in the UI:
## Creating a deployment
1. Go to Kubernetes explorer from the left navigation pane.
2. Go to **Deployments** and Click **Apply YAML**.
