The hosts instruction modifies host name resolution within a container.

hosts <ip address|local host name> <host name>

The syntax for this command matches that of the hosts file in Windows where the first parameter is a host name or IP address and the second parameter is the name to resolve the host name/IP address to.

This setting is persisted to the output image so that any containers created from that image will have these DNS settings applied.

# Make the loopback ip resolve to

# Redirect requests to to localhost
hosts localhost