Change the IP range used by Docker

This page indicates how to change the IP ranges used by Docker.

By default, docker will use these two ranges:

172.17.0.0/16: for the bridge network (also called docker0)
172.18.0.0/16: for the docker_gwbridge network

If the procedure is followed during the installation of Cyberwatch, only steps 3 and 4 are necessary.

Stop the instance:
```
sudo cyberwatch stop
```
Disconnect and remove network docker_gwbridge

  docker network disconnect -f docker_gwbridge gateway_ingress-sbox
  docker network rm docker_gwbridge

Edit file /etc/docker/daemon.json:
```
{
  "bip": "10.0.64.1/24",
  "default-address-pools": [
    { "base": "10.0.64.0/18", "size": 24 }
  ]
}
```
The field bip (Bridge IP) defines the IP range that network interface docker0 can use. The example reserves IP range 10.0.64.1/24 to the interface. Beware, the range must end with .1, otherwise docker won’t start.
The field default-address-pools defines the IP range of network interface docker_gwbridge. The example reserves IP range 10.0.64.0/18.
Restart docker:
```
sudo systemctl restart docker
```
Start Cyberwatch:
```
sudo cyberwatch start
```

Check that the IPs changed:

docker network inspect bridge | grep Subnet
docker network inspect docker_gwbridge | grep Subnet