Kubernetes Cookbook - Second Edition

Getting ready

Prepare the following YAML file, which is a simple Deployment that launches two nginx containers. Also, a NodePort service with TCP—30080 exposed:

# cat 3-1-1_deployment.yamlapiVersion: apps/v1kind: Deploymentmetadata:  name: my-nginxspec:  replicas: 2  selector:    matchLabels:      service : nginx  template:    metadata:      labels:        service : nginx    spec:      containers:        - name: my-container          image: nginx---apiVersion: v1kind: Servicemetadata:  name: my-nginxspec:  ports:    - protocol: TCP      port: 80      nodePort: 30080  type: NodePort  selector:    service: nginx

NodePort will bind to all the Kubernetes nodes (port range: 30000 to 32767); therefore, make sure NodePort is not used by other processes.

Let's use kubectl to create the resources used by the preceding ...