github-runner

github-runner.sh

#!/bin/bash

# Prompt for GitHub username
read -p "Enter GitHub username: " USER_NAME
# Prompt for repository name
read -p "Enter repository name: " RUNNER_FOLDER
# Prompt for GitHub Runner token
read -p "Enter GITHUB_RUNNER_TOKEN: " GITHUB_RUNNER_TOKEN

# Form the service name from 'runner-' and the repository name
SERVICE_NAME="runner-$RUNNER_FOLDER"

# Form the repository URL
REPO_URL="https://github.com/${USER_NAME}/${RUNNER_FOLDER}"

# Get the latest version of github-runner
latest_version=$(curl -s https://api.github.com/repos/actions/runner/releases/latest | grep "tag_name" | cut -d'"' -f4)
clean_version=${latest_version#v}

# Check if user 'github' exists, if not, create it
if id "github" &>/dev/null; then
    echo "User github already exists"
else
    sudo adduser --disabled-password --gecos "" github
fi

# Create the task folder in the home directory of the 'github' user
RUNNER_PATH="/home/github/$RUNNER_FOLDER"
sudo mkdir -p "$RUNNER_PATH"
sudo chown -R github:github "$RUNNER_PATH"
cd "$RUNNER_PATH"

# Download the latest version of github-runner as the 'github' user
ARCHIVE_NAME="actions-runner-linux-x64-${clean_version}.tar.gz"
DOWNLOAD_URL="https://github.com/actions/runner/releases/download/${latest_version}/actions-runner-linux-x64-${clean_version}.tar.gz"
echo "Downloading from: $DOWNLOAD_URL"
sudo -u github curl -o $ARCHIVE_NAME -L $DOWNLOAD_URL

# Check if the download was successful and the file exists
if [[ $? -ne 0 || ! -f $ARCHIVE_NAME ]]; then
    echo "Error: failed to download file $ARCHIVE_NAME"
    exit 1
fi

# Check if the downloaded file is a gzip archive
if ! sudo -u github file $ARCHIVE_NAME | grep -q 'gzip compressed data'; then
    echo "Error: downloaded file is not a gzip archive"
    exit 1
fi

# Extract the archive in the current directory as the 'github' user
if ! sudo -u github tar -xzf $ARCHIVE_NAME --strip-components=1; then
    echo "Error: failed to extract file $ARCHIVE_NAME"
    exit 1
fi

# Register the GitHub Runner as the 'github' user
if [[ -f ./config.sh ]]; then
    sudo -u github ./config.sh --url "$REPO_URL" --token "$GITHUB_RUNNER_TOKEN"
else
    echo "Error: config.sh file not found"
    exit 1
fi

# Create a systemd service
SERVICE_PATH="/etc/systemd/system/$SERVICE_NAME.service"
sudo bash -c "cat > $SERVICE_PATH" <<EOL
[Unit]
Description=GitHub Actions Runner
After=network.target

[Service]
ExecStart=$RUNNER_PATH/run.sh
User=github
WorkingDirectory=$RUNNER_PATH
Restart=always

[Install]
WantedBy=default.target
EOL

# Reload systemd and enable the service
sudo systemctl daemon-reload
sudo systemctl enable $SERVICE_NAME
sudo systemctl start $SERVICE_NAME

echo "GitHub Runner installed and started as service $SERVICE_NAME."