deploy-a-service.md

Deploy a selfcontained Spring Boot Microservice

We will use my Crudservice: https://github.com/wlanboy/CrudService

It is published on Docker Hub: https://hub.docker.com/repository/docker/wlanboy/crudservice

Prepare

cd ~
git clone https://github.com/wlanboy/CrudService.git

check you local kubectl

kubectl cluster-info
kubectl get pods --all-namespaces

deploy service on new namespace

cd ~/CrudService
kubectl create namespace crud
kubectl apply -f crudservice-deployment.yaml
kubectl apply -f crudservice-service.yaml
kubectl get pods -n crud -o wide

check deployment and service

kubectl describe deployments -n crud crudservice 
kubectl describe services -n crud crudservice-service

expose service and get node port

kubectl expose deployment -n crud crudservice --type=NodePort --name=crudservice-serviceexternal --port 8002
kubectl describe services -n crud crudservice-serviceexternal 

Result:

Name:                     crudservice-serviceexternal
Namespace:                crud
Labels:                   app=crudservice
Annotations:              <none>
Selector:                 app=crudservice
Type:                     NodePort
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.108.40.138
IPs:                      10.108.40.138
Port:                     <unset>  8002/TCP
TargetPort:               8002/TCP
NodePort:                 <unset>  30411/TCP  <--- THIS IS THE PORT WE NEED
Endpoints:                10.10.0.6:8002
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

call crudservice

• curl http://192.168.56.100:30411/actuator/health
• Result

{"status":"UP","groups":["liveness","readiness"]}