Kubernetes - How to expose 2 different containers in a pod?

You have multiple Options:

1. Create multiple services exposing one port each, on the same deployment.

2. Create single service exposing multiple ports:

   ---
   kind: Service
   apiVersion: v1
   metadata:
     name: my-service
   spec:
     selector:
       app: MyApp
     ports:
     - name: http
       protocol: TCP
       port: 80
       targetPort: 9376
     - name: https
       protocol: TCP
       port: 443
       targetPort: 9377
   

3. Using kubectl expose:

   kubectl expose service nginx --port=443 --target-port=8443 --name=nginx-https
   

Note that if no port is specified via –port and the exposed resource has multiple ports, all will be re-used by the new service. Also if no labels are specified, the new service will re-use the labels from the resource it exposes.

Source

When to use multi container pods: A pod is a group of one or more containers, the shared storage for those containers, and options about how to run the containers. Pods are always co-located and co-scheduled, and run in a shared context. A pod models an application-specific “logical host” - it contains one or more application containers which are relatively tightly coupled — in a pre-container world, they would have executed on the same physical or virtual machine.

You can actually do this in the command line:

kubectl expose deployment xxx --port=8080,18000 --type=NodePort

Set the ports just by a comma