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Add docs for --net flag

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Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
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Michael Crosby 2014-05-02 15:32:26 -07:00
parent 5ca6532011
commit c1c6b3ccd9
1 changed files with 44 additions and 2 deletions
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docs/sources/reference/run.md
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@ -136,8 +136,8 @@ PID files):
## Network Settings
-n=true : Enable networking for this container
--dns=[] : Set custom dns servers for the container
--dns=[] : Set custom dns servers for the container
--net=bridge : Set the network mode
By default, all containers have networking enabled and they can make any
outgoing connections. The operator can completely disable networking
@ -148,6 +148,48 @@ files or STDIN/STDOUT only.
Your container will use the same DNS servers as the host by default, but
you can override this with `--dns`.
Supported networking modes are:
* none - no networking in the container
* bridge - (default) connect the container to the bridge via veth interfaces
* host - use the host's network stack inside the container
* container - use another container's network stack
#### Mode: none
With the networking mode set to `none` a container will not have a access to
any external routes. The container will still have a `loopback` interface
enabled in the container but it does not have any routes to external traffic.
#### Mode: bridge
With the networking mode set to `bridge` a container will use docker's default
networking setup. A bridge is setup on the host, commonly named `docker0`,
and a pair of veth interfaces will be created for the container. One side of
the veth pair will remain on the host attached to the bridge while the other
side of the pair will be placed inside the container's namespaces in addition
to the `loopback` interface. An IP address will be allocated for containers
on the bridge's network and trafic will be routed though this bridge to the
container.
#### Mode: host
With the networking mode set to `host` a container will share the host's
network stack and all interfaces from the host will be available to the
container. The container's hostname will match the hostname on the host
system. Publishing ports and linking to other containers will not work
when sharing the host's network stack.
#### Mode: container
With the networking mode set to `container` a container will share the
network stack of another container. The other container's name must be
provided in the format of `--net container:<name|id>`.
Example running a redis container with redis binding to localhost then
running the redis-cli and connecting to the redis server over the
localhost interface.
$ docker run -d --name redis example/redis --bind 127.0.0.1
$ # use the redis container's network stack to access localhost
$ docker run --rm -ti --net container:redis example/redis-cli -h 127.0.0.1
## Clean Up (–rm)
By default a container's file system persists even after the container