prepare-instance

#!/bin/sh

LXD_CONTAINER=$1

GH_RUNNER_VERSION="2.301.1"
CONTAINER_DEPENDENCIES="ca-certificates curl gnupg lsb-release \
                        python3.8-venv python3.8-dev build-essential gcc jq"

#Exit early if the required base container already exists
BASE_CONTAINER_EXISTS=$(lxc ls |grep "$LXD_CONTAINER " |awk '{print $2}' |wc -l)
if [ $BASE_CONTAINER_EXISTS -ge 1 ]
then
    echo "You already have a base-container $LXD_CONTAINER \
          \n If you want to Create a new base-container for a different repo, please choose a different name \
          \n If you want to modify the existing base container, remove the existing container first by running: 'lxc stop $LXD_CONTAINER && lxc rm $LXD_CONTAINER'"
    exit 0
fi

#Create an new ubuntu20 container
lxc launch images:ubuntu/20.04 $LXD_CONTAINER

#Install all required dependencies for your github runner
(
cat << EOF
#!/bin/sh
set -eu

sudo apt-get update

#prepare most basic dependencies
sudo apt-get install $CONTAINER_DEPENDENCIES --yes

#prepare docker and docker-compose
sudo apt-get install apt-transport-https ca-certificates gnupg-agent software-properties-common --yes
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository    "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get install docker-ce=5:20.10.22~3-0~ubuntu-focal docker-ce-cli=5:20.10.22~3-0~ubuntu-focal docker-compose-plugin containerd.io --yes

#workaround to escape $@ to prevent script parameters to be used. We want to use legacy "docker-compose" beside the new "docker compose" 
echo 'docker compose "$' > /bin/docker-compose
echo '@"' > /bin/docker-compose && sed -i 's/^/docker compose "$/' /bin/docker-compose
chmod +x /bin/docker-compose


ARCH=x64
[ "\$(uname -m)" = "aarch64" ] && ARCH=arm64
curl -o /tmp/runner.tar.gz -L https://github.com/actions/runner/releases/download/v$GH_RUNNER_VERSION/actions-runner-linux-\${ARCH}-$GH_RUNNER_VERSION.tar.gz

# Create directory for the runner
rm -rf /srv/github-actions/
mkdir /srv/github-actions/
cd /srv/github-actions/
chown ubuntu:ubuntu /srv/github-actions/

# Unpack the code
sudo -u ubuntu -i tar zxf /tmp/runner.tar.gz -C /srv/github-actions/
# Add ubuntu user to docker group
sudo -su ubuntu sudo usermod -aG docker ubuntu

echo "ALL SETUP"

# Cleanup
rm /tmp/runner.tar.gz
EOF
) | lxc exec $LXD_CONTAINER /bin/sh