如何更改正在运行的Docker容器的网络?

问题描述

我正在尝试更新正在运行的Docker容器的网络.

I'm trying to update the network of a running docker container.

注意:我在运行容器时没有连接任何网络.

Note: I didn't attach any network while running the container.

[root@stagingrbt ~]# docker network connect host cdf8d6e3013d
Error response from daemon: container sharing network namespace with another container or host cannot be connected to any other network

[root@stagingrbt ~]# docker network connect docker_gwbridge cdf8d6e3013d
error during connect: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.39/networks/docker_gwbridge/connect: EOF


[root@stagingrbt ~]# docker network create -d host my-host-network
Error response from daemon: only one instance of "host" network is allowed


[root@stagingrbt ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
495080cf93e3        bridge              bridge              local
cf0408d6f13f        docker_gwbridge     bridge              local
2c5461835eaf        host                host                local
87e9cohcbogh        ingress             overlay             swarm
84dbd78101e3        none                null                local
774882ac9b09        sudhirnetwork       bridge              local

推荐答案

启动容器时，例如:

docker run -d --name alpine1 alpine

默认情况下它已连接到 bridge 网络，请使用以下命令进行检查:

It is by default connected to the bridge network, check it with:

docker container inspect alpine1

如果您尝试通过以下方式将其连接到 host 网络:

If you try to connect it to host network with:

docker network connect host alpine1

您得到一个错误:

您必须删除该容器，然后在主机网络上再次运行它:

you have to delete the container and run it again on the host network:

docker stop alpine1
docker rm alpine1
docker run -d --network host --name alpine1 alpine

此限制在网桥网络上不存在.您可以启动一个容器:

This limitation is not present on bridge networks. You can start a container:

docker run -d --name alpine2 alpine

将其与网桥网络断开连接，然后将其重新连接到另一个网桥网络.

disconnect it from the bridge network and reconnect it to another bridge network.

docker network disconnect bridge alpine2
docker network create --driver bridge alpine-net
docker network connect alpine-net alpine2

还请注意，根据文档:

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