Test communication between containers using DNS

When a DNS plugin is enabled, use a container name to address containers.

Before you begin

  • The container-tools meta-package is installed.
  • A network with the enabled DNS plugin has been created by using the podman network create command.

Procedure

  1. Run a receiver container attached to the mynet network: 
    # podman run -d --net mynet --name receiver ubi10  sleep 3000
  2. Run a sender container and reach the receiver container by its name: 
    # podman run -it --rm --net mynet --name sender alpine ping receiver
     
    PING rcv01 (10.89.0.2): 56 data bytes
64 bytes from 10.89.0.2: seq=0 ttl=42 time=0.041 ms
64 bytes from 10.89.0.2: seq=1 ttl=42 time=0.125 ms
64 bytes from 10.89.0.2: seq=2 ttl=42 time=0.109 ms

    Exit using the CTRL+C.

    You can see that the sender container can ping the receiver container using its name.