Configure container DNS in user-defined networks (Engine)
Embedded DNS server in user-defined networks
The information in this section covers the embedded DNS server operation for containers in user-defined networks. DNS lookup for containers connected to user-defined networks works differently compared to the containers connected to default bridge network.
Note: In order to maintain backward compatibility, the DNS configuration in
default bridgenetwork is retained with no behavioral change. Please refer to the DNS in default bridge network for more information on DNS configuration in thedefault bridgenetwork.
As of Docker 1.10, the docker daemon implements an embedded DNS server which provides built-in service discovery for any container created with a valid name or