having a pod with two containers can i ping each other using the container name

Question

How can the conatiners in a kubernetes pod ping each other? Can I do it using the container name?

Answer 1

• Containers on same pod act as if they are on the same machine. 

• You can ping them using localhost:port itself.

•  Every container in a pod shares the same IP. You can `ping localhost` inside a pod. 

• Two containers in the same pod share an IP and a network namespace and They are both localhost to each other. 

• Discovery works like this: 

• Component A's pods -> Service Of Component B -> Component B's pods and Services have domain names servicename.namespace.svc.cluster.local, the dns search path of pods by default includes that stuff, so a pod in namespace Foo can find a Service bar in same namespace Foo by connecting to `bar`​.