docker-network-connect(1)
NAME
docker-network-connect - connect a container to a network
SYNOPSIS
docker network connect [--help] NETWORK CONTAINER
DESCRIPTION
Connects a container to a network. You can connect a container by name
or by ID. Once connected, the container can communicate with other
containers in the same network.
$ docker network connect multi-host-network container1
You can also use the docker run --net=<network-name> option to start a
container and immediately connect it to a network.
$ docker run -itd --net=multi-host-network --ip 172.20.88.22 --ip6 2001:db8::8822 busybox
You can pause, restart, and stop containers that are connected to a
network. Paused containers remain connected and can be revealed by a
network inspect. When the container is stopped, it does not appear on
the network until you restart it.
If specified, the container's IP address(es) is reapplied when a
stopped container is restarted. If the IP address is no longer
available, the container fails to start. One way to guarantee that the
IP address is available is to specify an --ip-range when creating the
network, and choose the static IP address(es) from outside that range.
This ensures that the IP address is not given to another container
while this container is not on the network.
$ docker network create --subnet 172.20.0.0/16 --ip-range 172.20.240.0/20 multi-host-network
$ docker network connect --ip 172.20.128.2 multi-host-network container2
To verify the container is connected, use the docker network inspect
command. Use docker network disconnect to remove a container from the
network.
Once connected in network, containers can communicate using only
another container's IP address or name. For overlay networks or custom
plugins that support multi-host connectivity, containers connected to
the same multi-host network but launched from different Engines can
also communicate in this way.
You can connect a container to one or more networks. The networks need
not be the same type. For example, you can connect a single container
bridge and overlay networks.
OPTIONS
NETWORK
Specify network name
CONTAINER
Specify container name
--help
Print usage statement
HISTORY
OCT 2015, created by Mary Anthony mary@docker.com
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