Networking using the host network
Mục Lục
Networking using the host network
Estimated reading time:
2 minutes
This series of tutorials deals with networking standalone containers which bind
directly to the Docker host’s network, with no network isolation. For other
networking topics, see the overview.
Goal
The goal of this tutorial is to start a nginx
container which binds directly
to port 80 on the Docker host. From a networking point of view, this is the
same level of isolation as if the nginx
process were running directly on the
Docker host and not in a container. However, in all other ways, such as storage,
process namespace, and user namespace, the nginx
process is isolated from the
host.
Prerequisites
-
This procedure requires port 80 to be available on the Docker host. To make
Nginx listen on a different port, see the
documentation for thenginx
image -
The
host
networking driver only works on Linux hosts, and is not supported
on Docker for Mac, Docker for Windows, or Docker EE for Windows Server.
Procedure
-
Create and start the container as a detached process.
docker run
--rm
-itd
--network
host--name
my_nginx nginx -
Access Nginx by browsing to
http://localhost:80/. -
Examine your network stack using the following commands:
-
Examine all network interfaces and verify that a new one was not created.
ip addr show
-
Verify which process is bound to port 80, using the
netstat
command. You
need to usesudo
because the process is owned by the Docker daemon user
and you otherwise won’t be able to see its name or PID.sudo
netstat-tulpn
|grep
:80
-
-
Stop the container.
docker container stop my_nginx docker container rm my_nginx
Other networking tutorials
Now that you have completed the networking tutorials for standalone containers,
you might want to run through these other networking tutorials: