lxc_package_install.sh

#!/bin/bash
# =============================================================================
# Script Name: lxc_package_install.sh
# Version: 1.1
# Author: Andreas Fleckl
# Description: This script installs a specified package in all running LXC
#              containers. It includes error handling and logging.
# =============================================================================

# Check if a package name is provided
if [ -z "$1" ]; then
    echo "Usage: $0 <package_name>"
    exit 1
fi

PACKAGE_NAME="$1"

# Function to log messages with timestamp
log_message() {
    echo "$(date +"%Y-%m-%d %H:%M:%S") - $1"
}

# Function to check if a container is running
is_container_running() {
    local container=$1
    lxc-info -n "$container" | grep -q 'RUNNING'
}

# List all running Linux containers
containers=$(lxc-ls -f | awk 'NR>1 && $2 == "RUNNING" {print $1}')

# Install the package inside each container
install_package_in_container() {
    local container=$1
    local package=$2
    
    if is_container_running "$container"; then
        log_message "Installing $package in container: $container"
        lxc-attach -n "$container" -- apt update > /tmp/${container}_apt_update.log 2>&1
        if [[ $? -ne 0 ]]; then
            log_message "Failed to update APT in container: $container. Check /tmp/${container}_apt_update.log for details."
            return 1
        fi
        lxc-attach -n "$container" -- apt install -y "$package" > /tmp/${container}_apt_install_${package}.log 2>&1
        if [[ $? -ne 0 ]]; then
            log_message "Failed to install $package in container: $container. Check /tmp/${container}_apt_install_${package}.log for details."
            return 1
        fi
        log_message "Successfully installed $package in container: $container"
    else
        log_message "Container $container is not running. Skipping."
    fi
}

# Export functions for use with xargs
export -f log_message
export -f is_container_running
export -f install_package_in_container

# Process each container in parallel
echo "$containers" | xargs -I{} -n1 -P4 bash -c 'install_package_in_container "{}" "$PACKAGE_NAME"' _ "$PACKAGE_NAME"

log_message "All containers have been processed."