Configure Rancher Desktop 1.0.0 to use a custom bridge IP on Mac

rancher_desktop_BIP.txt

# This will survive restarts of Rancher Desktop.  I don't expect it to survive "Reset Kubernetes" actions.

# This will get a shell inside the running VM.
# Many thanks to Jan Dubois, this one liner replaced a complicated set of commands I had here earlier.
LIMA_HOME="$HOME/Library/Application Support/rancher-desktop/lima" limactl shell 0

sudo su -
vi /etc/conf.d/docker

# Add to the DOCKER_OPTS cli the bip and subnet you want.  I picked a very small /24 at the end of the 172.16/20 space:

DOCKER_OPTS="--bip 172.31.255.1/24"

# Save the file and exit

service docker restart

exit; exit

rm user.pem