SpringBoot-K8s-CRUD-MySQL

Deploy application to kubernetes cluster using command line

• mvn clean package
• Install Minikube
• Install Kubectl
• Install DockerDesktop

Commands :

• minikube start
• minikube status
• kubectl cluster-info

To read docker images from local / hub repository use this command in the windows

minikube docker-env

Copy the output of above command run again,it will be like this

@FOR /f "tokens=*" %i IN ('minikube -p minikube docker-env --shell cmd') DO @%i

Make docker image of the application

docker build -t crud-k8s:2.0 . 

To see docker image which you built above

docker images

Create config-map using command prompt

kubectl apply -f mysql-configMap.yaml

get config-map info using command prompt

kubectl get configmap

Create secrets using command prompt

kubectl apply -f mysql-secrets.yaml

get secrets info using command prompt

kubectl get secrets

Create db using command prompt

kubectl apply -f db-deployment.yaml

Check deployment which you created and ready state

kubectl get deployment 

see Pod & logs :

kubectl get pods

Copy the pod name from above and replace in the below command and see pod is running

kubectl logs {pod-name}

MySQL SSH

kubectl exec -it {pod-name} /bin/bash
mysql -u root -p
enter password : root
show databases;
You will see the database with the name of order_management

Create application using command prompt

kubectl apply -f app-deployment.yaml
kubectl get deployment

Expose service of application to see the port

kubectl get service
or
kubectl get svc

To see the logs of spring boot with 3 pods
kubectl logs {pod-name}

Port forward in the windows machine for the pod to call rest api from postman/curl etc

kubectl port-forward {pod-name} 5000:8080

Curl Request

curl --location --request POST 'localhost:5000/orders' \
--header 'Content-Type: application/json' \
--data-raw '{
    "name":"pizza",
    "qty":2,
    "price": 1000
}'

Minikube IP

minikube ip

Check health

minikube dashboard
  
copy the url and see in the dashboard pods , replica set , jobs etc  to see the health and delete pod etc.

Delete Service and deployment to clean up space