Install a self-hosted github runner on ubuntu arm64 or x64 with docker

install_docker_github_runner_ubuntu.sh

#!/bin/bash

# Install a self-hosted github runner on ubuntu arm64 or x64 with docker
# This runner can only execute one job concurrently. This is a general limitation of self-hosted github runner.
# Do not run multiple github runners on one machine, this cause race conditions. Use more (virtual-) machines.
# This script uses svc.sh to install the runner as systemd daemon which is automatically stared when the machine reboots.
# The runner gets the label "linux-$ARCH" (and no further default labels) and a default name (which is typically the host name).

# You can also run this script via ssh, without copying, from another machine via:
# cat install_docker_github_runner_ubuntu.sh | ssh root@xxx.xxx.xxx.xxx

# WARNING: This script creates a user USERNAME and assign sudo permissions without password (that means effectively root permissions!)
#          The user is added to the sudo and docker group and assigned sudo NOPASSWD permissions in /etc/sudoers

# get your token from github clicking "New self hosted runner"
TOKEN=""
REPO="your-github-repo"
RUNNER_RELEASE="2.311.0"
ARCH="arm64"
#ARCH="x64"
USERNAME="githubrunner"

sudo apt-get -yqq update
sudo apt-get -yqq install ca-certificates curl gnupg
sudo rm -f /etc/apt/keyrings/docker.gpg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get -yqq update
sudo apt-get -yqq install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin


echo "$USERNAME   ALL=(ALL:ALL) NOPASSWD: ALL" > /etc/sudoers.d/10-$USERNAME


create_user(){
    echo "Create user $1 as $(id)"
    sudo useradd -m ${1} -s /bin/bash
    sudo usermod -aG docker ${1}
    #sudo usermod -aG sudo ${1}
}

install_runner(){
    echo "Install runner as $(id)"
    mkdir actions-runner && cd actions-runner
    curl -Ss -o actions-runner-linux-${1}-${2}.tar.gz -L https://github.com/actions/runner/releases/download/v${2}/actions-runner-linux-${1}-${2}.tar.gz
    tar xzf ./actions-runner-linux-${1}-${2}.tar.gz
    ./config.sh --url https://github.com/${3} --token "${4}" --no-default-labels --unattended --labels linux-${1}
    sudo ./svc.sh install
    sudo ./svc.sh start
}


sudo bash -c "$(declare -f create_user); create_user $USERNAME"
sudo su - "$USERNAME" -c "$(declare -f install_runner); install_runner $ARCH $RUNNER_RELEASE $REPO $TOKEN"