How to communicate between Docker containers via “hostname”

by

The new networking feature allows you to connect to containers by
their name, so if you create a new network, any container connected to
that network can reach other containers by their name. Example:

1) Create new network

$ docker network create <network-name>

2) Connect containers to network

$ docker run --net=<network-name> ...

or

$ docker network connect <network-name> <container-name>

3) Ping container by name

docker exec -ti <container-name-A> ping <container-name-B> 

64 bytes from c1 (172.18.0.4): icmp_seq=1 ttl=64 time=0.137 ms
64 bytes from c1 (172.18.0.4): icmp_seq=2 ttl=64 time=0.073 ms
64 bytes from c1 (172.18.0.4): icmp_seq=3 ttl=64 time=0.074 ms
64 bytes from c1 (172.18.0.4): icmp_seq=4 ttl=64 time=0.074 ms

See this section of the documentation;

Note: Unlike legacy links the new networking will not create environment variables, nor share environment variables with other containers.

This feature currently doesn’t support aliases

More Related Contents:

  1. How to connect to docker host from container on Windows 10 (Docker for Windows)
  2. How to expose docker container’s ip and port to outside docker host without port mapping?
  3. Docker Network Nginx Resolver
  4. Containerized Node server inaccessible with server.listen(port, ‘127.0.0.1’)
  5. Network tools that simulate slow network connection [closed]
  6. What is the difference between a port and a socket?
  7. What is the largest Safe UDP Packet Size on the Internet
  8. How to access Network panel on google chrome developer tools with selenium?
  9. How does the socket API accept() function work?
  10. Mosquitto: Starting in local only mode
  11. Maximum packet size for a TCP connection
  12. What is the difference between active and passive FTP?
  13. Forward host port to docker container
  14. how to create docker overlay network between multi hosts?
  15. What causes a TCP/IP reset (RST) flag to be sent?
  16. What is the cost of many TIME_WAIT on the server side?
  17. Windows Phone 8 emulator can’t connect to the internet
  18. Is 0.0.0.0 a valid IP address?
  19. When is it appropriate to use UDP instead of TCP? [closed]
  20. How to use the host network, and any other user-defined network together in Docker-Compose?
  21. Why is network-byte-order defined to be big-endian? [closed]
  22. Can a TCP checksum fail to detect an error? If yes, how is this dealt with?
  23. Android Things: Connect to Raspberry Pi 3
  24. TCP Socket no connection timeout
  25. Wireshark localhost traffic capture [closed]
  26. Best TCP port number range for internal applications [closed]
  27. TCP vs UDP on video stream
  28. Viewing my IIS hosted site on other machines on my network
  29. TCP stream vs UDP message
  30. How to tell which interface the socket received the message from?

Leave a Comment