How to change default Docker bridge allocation?

Hi,

I changed my question to answer since I figured it out. Might be it will help soneone else down the road.

By default Docker assigns 172.17/16 subnet to the bridge.

In my case I needed 172.17/16 for macvlan network, so I swapped default allocation to 172.18/16.

In order to do this:

1.

# mkdir /etc/docker && cd /etc/docker

2.

# echo > /etc/docker/daemon.json <<EOF
{
  "bip": "172.18.0.1/16",
  "default-address-pools":
  [
    {"base": "172.18.0.0/16", "size": 24}
  ]
}
EOF

3. Restart Docker and enjoy your new bridge allocation.

If at any point you need to observe Docker log:

# tail -f /var/log/docker.log

Thank you.

Edited June 16, 20242 yr by xcore
solved