Is there a way to add a hostname to an EXISTING docker container?

Question

I have some containers that communicate via their IP from the network docker.

I can use the option -h or --hostname when running a new cont

Answer 1

One way is to create network and add different container in this network. When adding container in the network, you can use the --alias option of docker network. Like this:

• Create a network:

  docker network create  
  

• Add containers in the network:

  docker network connect --alias   
  docker network connect --alias   
  docker network connect --alias   
  

• Enjoy.

So each container can see other container by the alias (the alias is used as hostname).