kubernetes apply changes of existing service from json

Question

I need help to understand how can I update my svc configuration using a json file : my svc is up and runing but it is not the type i want, it is a cluster ip and I'd like to change it to a ingress kind and type load balancer: curently here is the service :

kubectl -n nifitest get svc -o wide
simplenifi-all-node   ClusterIP      192.164.115.193   <none>          8080/TCP,6007/TCP,10000/TCP   44h   app=nifi,nifi_cr=simplenifi

now I want to deploy a service that point to the ingress

so is tere a kubectl command like apply to use a json file and will it update the svc using a json file ?

Thank you for your help

Answer 1

You need to create new service with loadbalancer type. You cannot update the previous one (from type: ClusterIP to type: LoadBalancer) cause it is immutable.

By the way, I have given the format of loadbalancer service in both yaml and json as an example template, you can use them according to your need.

In Json format:

{
   "apiVersion": "v1",
   "kind": "Service",
   "metadata": {
      "name": "my-service"
   },
   "spec": {
      "selector": {
         "app": "MyApp"
      },
      "ports": [
         {
            "protocol": "TCP",
            "port": 80,
            "targetPort": 9376
         }
      ],
      "clusterIP": "192.164.115.193",
      "type": "LoadBalancer"
   },
   "status": {
      "loadBalancer": {
         "ingress": [
            {
               "ip": "192.0.2.127"
            }
         ]
      }
   }
}

In Yaml format:

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: MyApp
  ports:
    - protocol: TCP
      port: 80
      targetPort: 9376
  clusterIP: 192.164.115.193
  type: LoadBalancer
status:
  loadBalancer:
    ingress:
    - ip: 192.0.2.127