Connect 2 pods

Question

I have two Kubernetes-pods one is an application pod and another one is a database pod. How can i connect my application pod with the database pod?

Answer 1

• You can connect those two pods by using a service object. 

• The reason being, if the database pod goes away, it's going to come up with a different name and IP address, which means the connection string would need to be updated every time, managing that is difficult. 

• The service proxies traffic to pods and it also helps in load balancing of traffic if you have multiple pods to talk to. 

• It has its own IP and as long as service exists pod referencing this service in upstream will work and if the pods behind the service are not running, a pod will not see that and will try to forward the traffic but it will return a 502 bad gateway.

• So just define the Service and then bring up your Pods with the proper label so the Service will pick them up.