How to change docker0 ip address on centos 7

Docker Engine General
1

Hi community
Please, I have this issue:
In my company, we are using the 172.x.x.x networks (for VPN and other stuff) so I need to change the default subnet in docker0 network interface in my Centos 7.9 server.

  1. One possible solution that working is running is this:
    ip addr add dev docker0 192.168.1.1/24
    ip addr del dev docker0 172.17.0.1/16
    The troubble is that wen I restart the docker service, the docker0 interface back to the 172.17.0.1 so, when I create or run a container, that container use the 172.17.0.0/16 network.

  2. Several forums are saying to add the following to /etc/docker/daemon.json:
    {
    “bip”: “192.168.1.1/24”
    }
    I been trying adding the bip parameter, but error in the restart of docker.

  3. I try to edit /lib/systemd/system/docker.service before start Docker. Add --bip “192.168.1.1/24” at the end of line ExecStart=/usr/bin/dockerd.
    systemctl daemon-reload
    systemctl start docker
    Still error in the restart of docker :frowning:

Any ideas about how can I change permannent the subnet parameter in my Centos 7.9 server ¿?

2

If you don’t tell us what the errror messages were, we can’t recommend a solution. Changing “bip” was the right way. Do you have error messages?

3

Thanks @rimelek
Actually, I haved lost the touch…
I looked the error log and I find the troubble…
When I defined the network in the daemon.json, I was using a bad format. This is how working in Centos 7.9:

{
  "default-address-pools":
  [
    {"base":"192.168.1.1/24","size":24}
  ]
}
4

Thank you for sharing the working solution.

I edited your post. Please, next time format your post according to the following guide: How to format your forum posts
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