Can't see my app on browser deploying with Kubernetes - docker

Question

hope you all well!
I need to see my app on the browser but I believe that I'm missing something here and hope you can help me with this.
[root#kubernetes Docker]# kubectl get all
NAME READY STATUS RESTARTS AGE
pod/my-app2-56d5c786dd-n7mqq 1/1 Running 0 19m
pod/nginx-86c57db685-bxkpl 1/1 Running 0 13h
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31h
service/my-app2 ClusterIP 10.101.108.199 <none> 8085/TCP 12m
service/nginx NodePort 10.106.14.144 <none> 80:30525/TCP 13h
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/my-app2 1/1 1 1 19m
deployment.apps/nginx 1/1 1 1 13h
NAME DESIRED CURRENT READY AGE
replicaset.apps/my-app2-56d5c786dd 1 1 1 19m
replicaset.apps/nginx-86c57db685 1 1 1 13h
Overall you can see that everything is working fine right, looks the same to me.
To open this on my browser I'm using my IP address from Slave node where the container is allocated.
On my app I'm mapping the Hello like this #RequestMapping("/Hello")
On my dockerfile to build my image i used this:
[root#kubernetes project]# cat Dockerfile
FROM openjdk:8
COPY microservico-0.0.1-SNAPSHOT.jar microservico-0.0.1-SNAPSHOT.jar
#WORKDIR /usr/src/microservico-0.0.1-SNAPSHOT.jar
EXPOSE 8085
ENTRYPOINT ["java", "-jar", "microservico-0.0.1-SNAPSHOT.jar"]
So at the end, I think I need to call for my app this way.
---> ip:8085/Hello
[root#kubernetes project]# telnet kubeslave 8085
Trying 192.168.***.***...
telnet: connect to address 192.168.***.***: Connection refused
but I still see nothing...
Here is my deploy and service:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-app2
labels:
app: app
spec:
selector:
matchLabels:
app: app
role: master
tier: backend
replicas: 1
template:
metadata:
labels:
app: app
role: master
tier: backend
spec:
containers:
- name: appcontainer
image: *****this is ok*****:my-java-app
resources:
requests:
cpu: 100m
memory: 100Mi
ports:
- containerPort: 8085
apiVersion: v1
kind: Service
metadata:
name: my-app2
labels:
app: app
role: master
tier: backend
spec:
ports:
- port: 8085
targetPort: 8085
selector:
app: app
role: master
tier: backend

Answer 1

You have create a service which is of type ClusterIP(default). This type of service is only for accessing from inside the kubernetes cluster.For accessing it from browser you need to expose the pod via LoadBalancer or Nodeport service. LoadBalancer only works if you are one of supported public cloud otherwise Nodeport need to be used.
https://kubernetes.io/docs/tutorials/stateless-application/expose-external-ip-address/
https://kubernetes.io/docs/tasks/access-application-cluster/service-access-application-cluster/
Other than using service you can use kubectl proxy to access it as well.
If you are on Minikube then follow this
https://kubernetes.io/docs/tutorials/hello-minikube/