Restart Rancher Desktop from the CLI on Mac

rancher_desktop_restart.txt

Rancher Desktop is what I've switched to in place of Docker Desktop.  It has some differences that
need to be worked around (see previous gist for setting the network subnet a container uses).

One other issue is that after about 24 hours, the docker socket just stops listening.  It is currently
on Rancher's radar, but in the meantime, the only real solution is to stop and start the entire
Rancher Desktop app.  The below script does exactly that.

A second issue is that a running k3s cluster consumes enough CPU/power that it raises the temperature
of the Mac when it's idle and significantly cuts down on battery life.  The second script will stop
the k3s subsystem and kill all running containers, bringing the CPU usage down to a very low level.
Regular docker commands still work and DNS resolution inside of a running container works properly,
all while bringing the CPU level back down such that the battery life of the Mac is back to normal.
The Rancher team is actively working on making this a feature controllable from the UI:
    https://github.com/rancher-sandbox/rancher-desktop/issues/1562

rancher_k3s_stop.sh

$ cat /usr/local/bin/rancher_k3s_stop.sh
#!/usr/bin/env bash

echo "Stopping k3s in the VM"
LIMA_HOME="${HOME}/Library/Application Support/rancher-desktop/lima" limactl shell 0 sudo /etc/init.d/k3s stop
echo "Stopping all running docker images"
docker rm -f $(docker ps -aq)

restart_rancher_desktop.sh

$ cat /usr/local/bin/restart_rancher_desktop.sh
#!/usr/bin/env bash

osascript -e 'tell application "Rancher Desktop" to quit'
while osascript -e 'if application "Rancher Desktop" is not running then error 1' 2>/dev/null; do sleep 2; done
# Passing "stop" on the cli will skip the start-up of Rancher Desktop app
if [[ $1 = "stop" ]]; then
  echo "Skipping start up"
else
  open -a "Rancher Desktop"
fi