Helper script to replace Docker Desktop for Mac with Colima and test networking

docker-desktop-uninstall-colima-install.sh

#!/bin/env bash

#####################################################################
# REMOVE DOCKER DESKTOP FOR MAC (OPTIONAL: IF INSTALLED)
#####################################################################
echo ""
echo "Removing Docker Desktop for Mac..."

# 1. make sure docker running
sudo launchctl start com.docker.docker

# 2. clean up while still running
docker rmi -f $(docker images -a -q)
docker rm -f $(docker ps -a -q)
docker volume rm $(docker volume ls -q)

# 2. then turn off Docker Desktop for Mac
sudo launchctl stop com.docker.docker

# 3. then open Finder > Applications and "Move to Trash" and "Empty Trash" for "Docker" app
sudo rm -rf /Applications/Docker

# 4. remove leftover files
paths=(
    "~/Library/Cookies/com.docker.docker.binarycookies"
    "~/Library/Logs/Docker Desktop"
    "~/Library/Application Support/Docker Desktop"
    "~/Library/Caches/com.docker.docker"
    "~/Library/Group Containers/group.com.docker"
    "~/Library/Saved Application State/com.electron.docker-frontend.savedState"
    "/Library/PrivilegedHelperTools/com.docker.vmnetd"
    "/Library/LaunchDaemons/com.docker.vmnetd.plist"
    "/usr/local/lib/docker"
    "~/.docker"
)
for path in "${paths[@]}"; do
    eval rm -rf $path
    echo "Deleted: $path"
done

echo ""
echo "DONE."


#####################################################################
# INSTALL COLIMA WITH BUILDX, DOCKER, KUBECTL
#####################################################################
echo ""
echo "Installing Colima ..."

# 1. install colima
brew install colima

# 2. install docker
brew install docker

# 3. install buildx
brew install docker-buildx

# 4. install kubectl
brew install kubectl

# link buildx
mkdir -p ~/.docker/cli-plugins/
ln -sfn $(which docker-buildx) ~/.docker/cli-plugins/docker-buildx

# start colima
brew services start colima

# wait a minute or two for vm and container runtime then test
sleep 30
docker images

# hooray!
echo ""
echo "DONE."


#####################################################################
# ENSURE CONTAINERS CAN REACH HOST NETWORK (OPTIONAL)
#####################################################################
echo ""
echo "Testing networking ..."

# print out bridge network gateway IP
docker network inspect bridge -f '{{range .IPAM.Config}}{{.Gateway}}{{end}}'

# add flag for container run to point to host via DNS and print IP address
docker run -it --rm --add-host=host.docker.internal:host-gateway busybox ping host.docker.internal

# test databases
docker run -it --rm --add-host=host.docker.internal:host-gateway busybox nc -zv host.docker.internal 5432 # postgres
docker run -it --rm --add-host=host.docker.internal:host-gateway busybox nc -zv host.docker.internal 6379 # redis

echo ""
echo "DONE."
exit 0