mongodb conection string for kubernetes

The idea is pretty straight foward. With kubernetes you create your own network / cluster. Then u started to put in your database service and give it a name so it can be recognized by apps running on the same network, for example, you want to call your database "mongoserver".

Here we call our service mogoserver, doesnt really matter. But the label DOES. It will based on this criteria to look for your server (under the configuration called, labels (yeap this is important, besides the port number) It has gotta to match.

Service configuration file.

apiVersion: v1

kind: Service

metadata:

labels:

name : mongoserver

name: mongoserver

spec:

ports:

- port: 27017

protocol: TCP

targetPort: 27017

selector:

name : mongoserver

Database pod configuration file 

kind: Pod

apiVersion: v1

metadata:

labels:

name : mongoserver

name: mongoserver

spec:

volumes:

- name: mongo-pv-storage

persistentVolumeClaim:

claimName: mongo-pv-claim

containers:

- name: mongoserver

image: mongo

ports:

- containerPort: 27017

hostPort: 27017

name : mongoserver

volumeMounts:

- mountPath: "/data/db"

name: mongo-pv-storage

If your service is configure right, you can use the following command to check..

kubectl describe service/mongoserver and should see something below (look at the endpoints)  :- 

This shows that your endpoint has been successfully resolved. So if your mongo db connection string is "mongo://mongoserver:27017", it will get redirect to 172.17.9.5.