devopsfetch

#!/bin/bash

# Define functions for each information required

# Check if the script is running as root
if [ "$(id -u)" != "0" ]; then
  echo "This script requires root privileges. Please run with sudo or run as root"
  exit 1
fi

# Function to display active ports and services
ports() {
    if [ -z "$1" ]; then
        echo "Active Ports and Services:"
        echo "Port  Protocol   Service   PID   Command"
        # Use lsof to list listening ports, format output, and display as a table
        sudo lsof -i -P -n | grep LISTEN | awk '{print $9, $1, $2}' | sed 's/://' | sort -n | while read port prog pid; do
            proto=$(echo $port | cut -d'(' -f2 | cut -d')' -f1)
            port=$(echo $port | cut -d'(' -f1)
            cmd=$(ps -p $pid -o comm= | head -1)
            echo "$port $proto $prog $pid $cmd"
        done | column -t
    else
        # Show specific details for a port
        echo "Details for port $1:"
        sudo lsof -i :$1 -P -n | column -t
    fi
}

# Function to display Docker images and containers
docker_info() {
    if [ -z "$1" ]; then
        echo "Docker Images:"
        docker images | column -t
        echo
        echo "Docker Containers:"
        docker ps -a | column -t
    else
        # Show specific details for a container
        echo "Details for container $1:"
        docker inspect "$1" | jq '.[0] | {Name: .Name, State: .State, Mounts: .Mounts, NetworkSettings: .NetworkSettings}'
    fi
}

# Function to display Nginx configurations
nginx() {
    if [ -z "$1" ]; then
        echo "Nginx Configurations:"
        echo "Config File                              | Domain                        | Proxy"
        # Extract server_name and proxy_pass information from Nginx config files
        grep -H -r "server_name\|proxy_pass" /etc/nginx/sites-enabled/* | awk '
            /server_name/ { split($0, a, ":"); file=a[1]; domain=$3; gsub(/;/, "", domain) }
            /proxy_pass/ { proxy=$3; gsub(/;/, "", proxy); print file " | " domain " | " proxy }
        ' | column -t -s '|'
    else
        # Show details for a specific domain
        domain="$1"
        echo "Details for domain $domain:"
        config_file=$(grep -l "server_name.*$domain" /etc/nginx/sites-enabled/*)
        if [ -n "$config_file" ]; then
            echo "Configuration file: $config_file"
            echo "Server block:"
            sed -n '/server {/,/}/p' "$config_file" | sed 's/^/    /'
            echo "Listening ports:"
            grep "listen" "$config_file" | sed 's/^/    /'
            echo "Proxy configuration:"
            grep "proxy_pass" "$config_file" | sed 's/^/    /'
            echo "SSL configuration:"
            grep "ssl_certificate" "$config_file" | sed 's/^/    /'
        else
            echo "Domain '$domain' not found in Nginx configurations."
        fi
    fi
}

# Function to display users and last login times
users() {
    if [ -z "$1" ]; then
        echo "Users and Last Login Times:"
        seen=()
        echo "User           last login"
        # Filter out reboot and wtmp entries, and print unique users
        last | awk '/^[^w]/ {if (!seen[$1]) {print $1, $3, $4, $5; seen[$1] = 1}}' | column -t
    else
        # Show specific details for a user
        echo "Details for user $1:"
        id "$1"
        echo "Last login:"
        last "$1" | head -n 1
    fi
}

# Function to display activities within a specified time range
time_range() {
    if [ -z "$1" ]; then
        echo "Error: No date provided. Usage: devopsfetch -t YYYY-MM-DD [YYYY-MM-DD]"
        return 1
    fi
    
    start_date=$1
    end_date=${2:-$start_date}
    
    echo "Activities from $start_date to $end_date:"
    journalctl --since "$start_date" --until "$end_date 23:59:59" | tail -n 50
}

# Help
help(){
    echo """Usage: devopsfetch [OPTIONS]
    Your devops tool for server information retrieval and monitoring
    Global Options: 
        -p  --port    Display all active ports and services
                      Use -p <port_number> to get detailed information about a specific port 
        -d  --docker  List all Docker images and containers 
                      Use -d <container_name> to get detailed information about a specific container
        -n  --nginx   Display all Nginx domains and their ports
                      Use -n <domain> to get detailed configuration information for a specific domain
        -u  --users   List all users and their last login times
                      Use -u <username> ls
                      to get detailed information about a specific user
        -t  --time    Display activities within a specified time range
        -h  --help    Provide usage instructions for the program"""
}

# Process options when the devopsfetch is called
case "$1" in
        -p|--ports) 
            ports "$2"
            ;;

        -d|--docker) 
            docker_info "$2"
            ;;

        -n|--nginx) 
            nginx "$2"
            ;;

        -u|--users)
            users "$2"
            ;;

        -t|--time) 
            time_range "$2" "$3"
            ;;
        
        -h|--help)
            help
        ;;

        *)
            echo "Invalid option. Use -h or --help for usage information."
            help
            exit 1
            ;;

esac