Usage: docker network connect [OPTIONS] NETWORK CONTAINER Connect a container to a network Options: --alias value Add network-scoped alias for the container (default ) --help Print usage --ip string IP Address --ip6 string IPv6 Address --link value Add link to another container (default ) --link-local-ip value Add a link-local address for the container (default )
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 --network=<network-name> option to start a container and immediately connect it to a network.
$ docker run -itd --network=multi-host-network busybox
You can specify the IP address you want to be assigned to the container’s interface.
$ docker network connect --ip 10.10.36.122 multi-host-network container2
You can use
--link option to link another container with a preferred alias
$ docker network connect --link container1:c1 multi-host-network container2
--alias option can be used to resolve the container by another name in the network
being connected to.
$ docker network connect --alias db --alias mysql multi-host-network container2
You can pause, restart, and stop containers that are connected to a network.
Paused containers remain connected and can be revealed by a
When the container is stopped, it does not appear on the network until you restart
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.
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