Question 27056 in CentOS Question posted in
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Error response from daemon: bridge is a pre-defined network and cannot be removed – CentOS

CentOS 7

Docker 20.10

I want to delete all networks.

docker container ls
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

As you can see no containers. I was removed it before.
I try this:

docker network ls
NETWORK ID     NAME      DRIVER    SCOPE
1b6758d38df3   bridge    bridge    local
89dea066d590   host      host      local
8e235018309e   none      null      local

And this:

docker network rm 1b6758d38df3
Error response from daemon: bridge is a pre-defined network and cannot be removed

P.S the folder /var/lib/docker is empty

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2

Answers


  1. 0

    Those are the system networks included in every Docker installation, they are not like user-defined networks and cannot be removed.

    From the docs for thedocker network prune command:

    Note that system networks such as bridge, host, and none will never be pruned

    From the Network containers tutorial page:

    Every installation of the Docker Engine automatically includes three default networks.
    […]
    The network named bridge is a special network. Unless you tell it otherwise, Docker always launches your containers in this network.

    This would mean that removing those networks would break some of Docker‘s networking features.

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  2. 0

    For what purpose do you want to remove/delete default network provided by Docker… Please share your use case so some one from community can guide you accordingly…

    Bridge, Host & None are default & pre defined network… These networks are created during installation of docker….

    Bridge – All containers without –network options get created within
    bridge network only
    To verify this you can run following commands –

    docker run -it --rm --name=default-bridge-container1 busybox

    As above command does not have –network option then it will be create container default-bridge-container1 under bridge network. To verify this, Run

    docker network inspect bridge

    Under containers section of inspect command, you will see container name default-bridge-container1 with IP assigned to it from bridge subnet.

    Host – this option tells to use underlying host network

    None – Container with –network=none means container is running in
    isolation & it has no access to inward or outward network.

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