I have a sample application running on a Kubernetes cluster. Two microservices, one is a mongodb container and the other is a java springboot container.
The springboot container interacts with the mongodb container thro a service and stores data into the mongodb container.
The specs are provided below.
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: empappdepl
labels:
name: empapp
spec:
replicas: 1
template:
metadata:
labels:
name: empapp
spec:
containers:
-
resources:
limits:
cpu: 0.5
image: 11.168.xx.xx:5000/employee:latest
imagePullPolicy: IfNotPresent
name: wsemp
ports:
- containerPort: 8080
name: wsemp
command: ["java","-Dspring.data.mongodb.uri=mongodb://mongoservice/microservices", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
imagePullSecrets:
- name: myregistrykey
---
apiVersion: v1
kind: Service
metadata:
labels:
name: empwhatever
name: empservice
spec:
ports:
- port: 8080
nodePort: 30062
type: NodePort
selector:
name: empapp
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: mongodbdepl
labels:
name: mongodb
spec:
replicas: 1
template:
metadata:
labels:
name: mongodb
spec:
containers:
- resources:
limits:
cpu: 1
image: mongo
imagePullPolicy: IfNotPresent
name: mongodb
ports:
- containerPort: 27017
---
apiVersion: v1
kind: Service
metadata:
labels:
name: mongowhatever
name: mongoservice
spec:
ports:
- port: 27017
targetPort: 27017
protocol: TCP
type: NodePort
selector:
name: mongodb
I would like to know how this communication can be accomplished in spinnaker since it creates its own labels and selectors.
Thanks,
This is how it needs to be done.
Each loadbalancer created for the application is the service. So for mongodb application, after a loadbalancer is created with the nodeport settings, get the name of the service eg: mongodb-dev. The server group for mongodb also needs to be created.
Then when creating the employee server group, you need to specify the commands one by one in a separate line for that container as mentioned here
https://github.com/spinnaker/spinnaker/issues/2021#issuecomment-334885467
"java","-Dspring.data.mongodb.uri=mongodb://name-of-mongodb-service/microservices", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"
Now when the employee and mongodb pod starts, it is able to get its mapping and able to communicate properly.