Creating kubernetes services using YAML and JSON files

You can also create Kubernetes resources manually using YAML and JSON files. Let's go ahead and create a simple pod running a httpd web server using the kubectl create command. We will have to create a YAML-formatted file:

$ cat httpd-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: httpd
  namespace: default
spec:
  containers:
  - name: httpd-container
    image: httpd
    ports:
    - containerPort: 80

It may look a bit complicated and hard to understand, but as we move on in this book, you will see a lot of similarities between these YAML and JSON files. 

Create a pod using the httpd-pod.yaml file:

$ kubectl create -f httpd-pod.yaml

$ kubectl get all
NAME        READY       STATUS     RESTARTS     AGE
po/httpd    1/1         Running       0         25s

NAME            TYPE     CLUSTER-IP    EXTERNAL-IP PORT(S) AGE
svc/kubernetes ClusterIP 10.96.0.1     <none>     443/TCP  56s

This command creates a pod named httpd; it does not create anything else. In larger deployments with heavy automation involved, this is the way to deploy Kubernetes resources, but this, of course, requires better Kubernetes skills.

Similarly, we can create other Kubernetes resources, including ReplicaSet, Deployment, and others.