Docker out of Docker using Ubuntu 22.04

dood.sh

# adapted from: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04
## This allows a Docker container to connect to the Docker server on the host to manage Docker resources

# run a Docker instance in the background
docker container run \
  --rm \
  -v /var/run/docker.sock:/var/run/docker.sock \
  --name dood \
  ubuntu:22.04 sleep inf &

# Setup environment for Docker out of Docker (DooD)
<<'eof' docker container exec -i dood /bin/bash
  export DEBIAN_FRONTEND=noninteractive
  apt-get update
  apt-get install -y apt-transport-https ca-certificates curl software-properties-common
  curl -fsSL https://download.docker.com/linux/$( lsb_release -is | tr A-Z a-z )/gpg |
    gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

  echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/$( lsb_release -is | tr A-Z a-z ) $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list

  apt-cache policy docker-ce
  apt-get update
  apt-get install -y docker-ce
eof

# Exec into the instance
docker container exec -it dood /bin/bash

# Can commit or otherwise save instance
# ... { insert commands here }

# Remove the instance
docker container stop dood