I'm running locally a statefulset replica of MongoDB on Minikube and I'm trying to connect to this one using Spring Mongo DB.
In the configuration properties I have:
spring.data.mongodb.uri=mongodb://mongod-0.mongo:27017/test
The problem is that, when I try to deploy the application locally, I receive this error:
com.mongodb.MongoSocketException: mongod-0.mongo: Name or service not known
Looks like I can't enrich the deployed replica but I don't know why.
The statefulset, the service and the pods are running correctly.
Here is the configuration of them:
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mongod
spec:
serviceName: mongodb-service
replicas: 1
selector:
matchLabels:
role: mongo
template:
metadata:
labels:
role: mongo
environment: test
replicaset: MainRepSet
spec:
terminationGracePeriodSeconds: 10
containers:
- name: mongod-container
image: mongo
command:
- "mongod"
- "--bind_ip"
- "0.0.0.0"
- "--replSet"
- "MainRepSet"
resources:
requests:
cpu: 0.2
memory: 200Mi
ports:
- containerPort: 27017
volumeMounts:
- name: mongodb-persistent-storage-claim
mountPath: /data/db
volumeClaimTemplates:
- metadata:
name: mongodb-persistent-storage-claim
annotations:
volume.beta.kubernetes.io/storage-class: "standard"
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
apiVersion: v1
kind: Service
metadata:
name: mongodb-service
labels:
name: mongo
spec:
ports:
- port: 27017
targetPort: 27017
clusterIP: None
selector:
role: mongo
Someone has any idea how I could connect my application to the replica?
it's due to your service name is : mongodb-service
You have to use always service name in connection strings everywhere mostly.
Traffic flow goes like :
Service -> deployment or statefulsets -> PODs
now you have exposed the service name and port(27017) and K8s will auto manage the service name into internal DNS, so you can use the name for the connection string.
Your application will be only able to connect on service name if running on the same K8s cluster.
Example :
spring.data.mongodb.uri=mongodb://mongo-service:27017/test
You can follow this article also for refrence. : https://medium.com/geekculture/how-to-deploy-spring-boot-and-mongodb-to-kubernetes-minikube-71c92c273d5e