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