minikube kubernetes – create deployment with multiple replica and load balancer

This tutorial assumers that minikube kubernetes is already installed. Steps to create a deployment with 3 replicas and load balancer:

1. Start a cluster with 2 nodes (1 node also ok):
   minikube start --nodes 2
2. create minikube tunnel to support external access
   minikube tunnel
3. create deployment with 3 replicas
   kubectl create deployment hello-minikube --image=kicbase/echo-server:1.0 --replicas=3
4. Expose deployment (type loadBalancer)
   kubectl expose deployment hello-minikube --type=LoadBalancer --port=8080
5. View the service detail
   kubectl get services hello-minikube
6. Get yaml file of deployment
   kubectl get deploy hello-minikube -o yaml
7. Print the external service url and port
   kubectl get svc
   

   NAME             TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
   hello-minikube   LoadBalancer   10.106.211.74   127.0.0.1     8080:31806/TCP   6m36s
   kubernetes       ClusterIP      10.96.0.1       <none>        443/TCP          9m50s

8. access the service
   curl http://127.0.0.1:8080/
   

   Request served by hello-minikube-7ddcbc9b8b-b94pq
   
   HTTP/1.1 GET /
   
   Host: 127.0.0.1:8080
   Accept: */*
   User-Agent: curl/7.84.0

   
   You can run above multiple time and you should get different pods in response.
9. One alternative to using tunnel above it exposing service url using service command
   minikube service hello-minikube --url
   

   😿  service default/kubernetes has no node port
   http://127.0.0.1:61762
   ❗  Because you are using a Docker driver on darwin, the terminal needs to be open to run it.

   
   You can run curl on above url multiple time and you should get different pods in response.