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#!/usr/bin/env bash
# By
#   Corey Stewart
#   Zeb Walker zebw@inmotionhosting.com
#   Jeff Shepherd jeffsh@inmotionhosting.com
#
# Purpose:
#   To display common variables in a VPS/Dedi server's configuration which
#   helps identify common issues, and otherwise to quicky understand what
#   kind of server that we are getting ourselves into

# we need root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root."
   exit 1
fi

readonly VERSION="2.0.3"

# term colors and formatting
readonly BAD='\e[1;31m |!| '
readonly ALERT='\e[1;31m'
readonly WARN='\e[33m'
readonly GOOD='\e[1;32m'
readonly INFO='\e[96m'
readonly BOLD='\e[1m'
readonly DEF='\e[0m' # Reset to standard terminal styles

# repeatedly used constants
TRUE_NPROC="$(nproc)"
if [[ -d /proc/vz ]]; then
    VPS_CTID="$(awk '{print $1}' /proc/vz/veinfo)"
    MAIN_IP="$(awk '{print $NF}' /proc/vz/veinfo)"
else
    MAIN_IP="$(hostname -i)"
fi

# Print each section title in bold
function SECTION_TITLE() {
  echo -e "\n${BOLD}------$1------${DEF}"
}

function CHECK_FTP_SERVICE() {
    SERVICE_CHK=$1
    if [[ ${SERVICE_CHK_CMD} == "service" ]]; then
        if [[ ${SERVICE_CHK} == "pure-ftpd" ]]; then
            # The default FTP server, Pure-FTP, is not running, but was it changed
            # to Pro-FTPD?
            pgrep proftpd > /dev/null
            case $? in
                0) ;; # Do nothing. PID found.
                1) echo -e "${BAD}FTP Server is DOWN${DEF}" ;;
                *) echo -e "${WARN}FTP Server: Unknown Status or Disabled${DEF}" ;;
            esac
        else
            echo -e "${BAD}${SERVICE_CHK}${DEF}"
        fi
    else
        if [[ ${SERVICE_CHK} == "pure-ftpd" ]]; then
            # The default FTP server, Pure-FTP, is not running, but was it changed
            # to Pro-FTPD?
            systemctl is-active proftpd --quiet
            case $? in
                0) ;; # Do nothing. Service is active.
                1) echo -e "${BAD}FTP Server is DOWN${DEF}" ;;
                *) echo -e "${WARN}FTP Server: Unknown Status or Disabled${DEF}" ;;
            esac
        else
            echo -e "${BAD}${SERVICE_CHK}${DEF}"
        fi
    fi
}

echo "DedCheck Version: ${VERSION}"

# Server details
SECTION_TITLE "System Info"

# Flag CentOS 5, 6, and 8 (EOL 2021-12-31) and set 'service' vs 'systemctl'.
# Why? Some units can be active even though nothing is running to provide
# the service (which means 'pgrep' will then fail). Such as units marked as
# "RemainAfterExit" are considered active if they exit successfully, the idea
# being that they provide a service which doesn’t need a daemon (e.g. they
# configure some aspect of the system). Units involving daemons will however
# only be active if the daemon is still running.
OS="$(cat /etc/redhat-release)"
if [[ ${OS} =~ 5.([0-9]{1,2}) ]]; then
    OS="${BAD}${OS}${DEF}"
    SERVICE_CHK_CMD="service"
elif [[ ${OS} =~ 6.([0-9]{1,2}) ]]; then
    OS="${BAD}${OS}${DEF}"
    SERVICE_CHK_CMD="service"
elif [[ ${OS} =~ 8.([0-9]) ]]; then
    OS="${WARN}${OS}${DEF}"
fi
echo -e "OS: ${OS}"
echo "Hostname: ${HOSTNAME}"
if [[ -n "${VPS_CTID}" ]]; then
    echo "VPS CTID: vps${VPS_CTID}"
fi
echo "Main IP: ${MAIN_IP}"

# Number of IPs in use.
echo "IPs: $(/scripts/ipusage | wc -l)"

# What firewall is is installed?
firewall=()
FIREWALL_LIST=(csf firewalld fail2ban-client imunify360-agent apf)
for FIREWALL in "${FIREWALL_LIST[@]}"; do
    command -v ${FIREWALL} > /dev/null 2>&1
    case $? in
        0)  # Command found, firewall installed
            if [[ $FIREWALL == "imunify360-agent" ]]; then
                # Make sure it's the paid version, which is the only one with firewall features
                IM_TYPE=$(imunify-antivirus rstatus --json -v | grep -m 1 license_type | awk '{ gsub(/[",]/,""); print $2}')
                if [[ ! ${IM_TYPE} == "imunifyAV" ]]; then
                    # This is not the free version. Report the firewall.
                    firewalls+="${FIREWALL^^} "
                fi
            elif [[ $FIREWALL == "firewalld" ]] ||
                 [[ $FIREWALL == "csf" ]] ||
                 [[ $FIREWALL == "fail2ban-client" ]]; then
                # If it's FirewallD, CSF or Fail2ban, check for the others. They're installed with CSF by MH
                # for extra WordPress Brute Force protection and FirewallD is installed with Fail2ban, which
                # makes it a false-positive to report. Attempting to remove FirewallD in these cases due to
                # a false report will remove Fail2ban as well, thus removing the protection requested by the
                # customer.
                if [ ! $(command -v csf > /dev/null 2>&1) ] &&
                   [ ! $(command -v fail2ban-client > /dev/null 2>&1) ] &&
                   [ ! $(command -v firewall-cmd > /dev/null 2>&1) ]; then
                    # All 3 are found, so the real, primary, firewall in these cases is CSF.
                    firewalls="CSF "
                else
                    firewalls+="${FIREWALL^^} "
                fi
            else
                firewalls+="${FIREWALL^^} "
            fi
            ;;
        *)  ;; # Not found/installed. Continue.
    esac
done
fw_length=$(echo ${firewalls} | wc -w)
if [ $fw_length == 0 ]; then
    fws="${BAD}WARNING! NO FIREWALL!${DEF}"
elif [ $fw_length -gt 1 ]; then
    fws="${BAD}${firewalls}${DEF}"
else
    fws="${INFO}${firewalls}${DEF}"
fi
echo -e "Firewall: ${fws}"

SECTION_TITLE "System Health"

# CPU load and count
echo "# CPU Cores: ${TRUE_NPROC}"

# Give the load avg
echo -e "Load Avg: $(awk '{print $1" "$2" "$3}' /proc/loadavg)"

#RAM and SWAP
if freem="$(free -mw 2>/dev/null)"; then
    ramavail="$(awk '/^Mem/ {print $NF}' <<< "${freem}")"
else
      # CentOS 6- free doesn't support --wide,
      # it also puts avail ram on 2nd table row
      freem="$(free -m)"
      ramavail="$(awk '/buffers\/cache/ {print $NF}' <<< "${freem}")"
fi
ramtotal="$(awk '/^Mem/ {print $2}' <<< "${freem}")"
if (( ${ramavail} < 50 )); then
    ramavail="${BAD}${ramavail}"
elif (( ${ramavail} < 250 )); then
    ramavail="${WARN}${ramavail}"
fi
echo -e "RAM: ${ramavail} MiB Avail${DEF} / ${ramtotal} MiB Total"

if [[ -n "${VPS_CTID}" ]]; then
    swap_stats="No Swap on VPS"
else
    swaptotal="$(awk '/^Swap/ {print $2}' <<< "${freem}")"
    swapfree="$(awk '/^Swap/ {print $NF}' <<< "${freem}")"
    if (( ${swapfree} < 50 )); then
        swapfree="${BAD}${swapfree}"
    elif (( ${swapfree} < 250 )); then
        swapfree="${WARN}${swapfree}"
    fi
    swap_stats="${swapfree} MiB${DEF} Free / ${swaptotal} MiB Total"
fi
echo -e "SWAP: ${swap_stats}"

SECTION_TITLE "cPanel"

cp_ver_prim="$(awk -F. '{ print $2 }' /usr/local/cpanel/version)"
cp_ver_sec="$(awk -F. '{ print $4 }' /usr/local/cpanel/version)"
cp_ver="${cp_ver_prim}.0.${cp_ver_sec}"
# cPanel v86 is the current LTS, flag if under it
if [[ ${cp_ver_prim} -lt 86 ]]; then
    cp_ver="${BAD}${cp_ver}${DEF}"
fi
echo -e "cPanel Version: ${cp_ver}"

# Check cPanel license
cpanel_license_test="$( /usr/local/cpanel/cpkeyclt )"
if [[ ${cpanel_license_test} = *"Update succeeded"* ]]; then
    cpanellicensestatus="Active"
else
    cpanellicensestatus="${BAD}Invalid${DEF}"
fi
echo -e "License: ${cpanellicensestatus}"

# cPanel users and reseller counts
accounts="$(wc -l < /etc/trueuserdomains)"
if (( ${accounts} == 0 )); then
  ${accounts}="${WARN}${accounts}${DEF}"
fi
echo -e "Accounts: ${accounts}"

resellers="$(wc -l < /var/cpanel/resellers)"
if (( ${resellers} == 0 )); then
    resellers="${WARN}${resellers}${DEF}"
fi
echo -e "Resellers: ${resellers}"

# check autossl provider
# couldn't find a faster way, whmapi can be super slow
autossl="$(whmapi1 get_autossl_providers | tac | awk '
    BEGIN {found=0}
    /enabled: 1/ {found=1}
    {if (found)
        if ($1 ~ "display_name:") {
            $1=""; print; exit }}')"
if [[ -z ${autossl} ]]; then
    autossl=" ${WARN}Disabled${DEF}"
fi
echo -e "AutoSSL:${autossl}"

# Find out whether or not cPanel backups are enabled
backup_enabled=$(whmapi1 backup_config_get \
  | awk '{if ($1 ~ "backupenable:") print $2}')
if [[ ${backup_enabled} == "1" ]]; then
    backup_status="Enabled"
else
    backup_status="${WARN}Disabled${DEF}"
fi
echo -e "WHM AutoBackups: ${backup_status}"

# Are custom nameservers configured?
nameservers="$(awk '
    BEGIN {ORS=" "}
    $2 ~ /[a-z]+/ && /^NS/ {print $2}' \
    /etc/wwwacct.conf)"

echo -e "Name Servers: ${nameservers}"

# Check if BIND or PowerDNS is running. No others are supported.
grep -Ei "inmotionhosting.com|servconfig.com" <<< "$nameservers" > /dev/null 2>&1
if [ $? -eq 1 ]; then
    NS_SERVICE=()
    NS_SERVICES=(named pdns)
    for NS in "${NS_SERVICES[@]}"; do
        if [[ $SERVICE_CHK_CMD == "service" ]]; then
            pgrep ${NS} > /dev/null
        else
            systemctl is-active ${NS} --quiet
        fi
        if [[ "$?" == 0 ]]; then
            case "${NS}" in
                pdns | named) # PowerDNS and BIND
                    NS_SERVICE+="${NS^^} "
                    ;;
                *) # Continue
                    ;;
            esac
        fi
    done
    NS_LENGTH=$(echo ${NS_SERVICE} | wc -w)
    if [ ${NS}_length == 0 ]; then
        NS_STATUS="${WARN}WARNING! NO DNS Server Running!${DEF} Are these vanity?"
    elif [ $NS_LENGTH -gt 1 ]; then
        NS_STATUS=" ${BAD}${NS_SERVICE}${DEF}"
    else
        NS_STATUS="${INFO}${NS_SERVICE}${DEF}"
    fi
    echo -e "Name Server Service: ${NS_STATUS}"
fi


SECTION_TITLE "LAMP"

# EasyApache 3 versus 4
if [[ -f /etc/cpanel/ea4/is_ea4 ]]; then
    EA_VERSION="EasyApache 4"
else
    EA_VERSION="${BAD}EasyApache 3${DEF}"
fi
echo -e "EA: ${EA_VERSION}"

# Apache version
APACHE_VER="$(httpd -v | \
    awk '/^Server version/ {gsub("Apache/","",$3); print $3}')"
APACHE_VER_SEC="$(awk -F. '{print $2}' <<< ${APACHE_VER})"
# if it ain't 2.4.x, we flag as bad
case ${APACHE_VER_SEC} in
  4) # It's 2.4+. We're good!
    ;;
  *) APACHE_VER="${BAD}${APACHE_VER}${DEF}"
    ;;
esac
echo -e "Apache: ${APACHE_VER}"

# MySQL or MariaDB version
MYSQL_VER="$(mysql -V | awk '{gsub(/,/,""); print $5}')"
MYSQL_VER_PRI="$(awk -F. '{print $1}' <<< ${MYSQL_VER})"
MYSQL_VER_SEC="$(awk -F. '{print $2}' <<< ${MYSQL_VER})"
# flag near-EOL as warn, and EOL as bad
case ${MYSQL_VER_PRI} in
    10) case ${MYSQL_VER_SEC} in
            6) MYSQL_VER="${BAD}${MYSQL_VER} DEVELOPMENT${DEF}" ;; # In Development
            5) MYSQL_VER="${GOOD}${MYSQL_VER}${DEF} EOL: 2025-06-24" ;;
            4) MYSQL_VER="${BAD}${MYSQL_VER} SKIPPED BY CPANEL!!${DEF}\n\tSee: https://features.cpanel.net/topic/maria-10-4-support" ;;
               # cPanel is skipping MariaDB 10.4. How'd this get installed??
            3) MYSQL_VER="${GOOD}${MYSQL_VER}${DEF} EOL: 2023-05-25" ;;
            2) MYSQL_VER="${WARN}${MYSQL_VER}${DEF} EOL: 2022-05-23" ;;
            [0-1]) MYSQL_VER="${BAD}${MYSQL_VER} EOL in 2020!${DEF}" ;; # 10.0 EOL: 2020-04-11 // 10.1 EOL: 2020-10-17
        esac
        ;;
    8)  case ${MYSQL_VER_SEC} in
            0) MYSQL_VER="${GOOD}${MYSQL_VER}${DEF} EOL: 2026-04" ;;
        esac
        ;;
    5)  case ${MYSQL_VER_SEC} in
            7) MYSQL_VER="${WARN}${MYSQL_VER}${DEF} EOL: 2023-10-21" ;;
            6) MYSQL_VER="${WARN}${MYSQL_VER}${DEF} EOL: 2021-02-05" ;;
            5) MYSQL_VER="${WARN}${MYSQL_VER}${DEF} EOL: 2018-12-03" ;;
            [0-4]) MYSQL_VER="${BAD}${MYSQL_VER} EOL Prior 2018!${DEF}" ;;
        esac
        ;;
esac
echo -e "MySQL: ${MYSQL_VER}"

# Default PHP version
PHP_VER="$(awk '{print $2}' <<< $(php -v))"
PHP_VER_PRI="$(awk -F. '{print $1}' <<< ${PHP_VER})"
PHP_VER_SEC="$(awk -F. '{print $2}' <<< ${PHP_VER})"
# flag EOL as warn, and non-EA4 as bad
case ${PHP_VER_PRI} in
    8)  case ${PHP_VER_SEC} in
            1) PHP_VER="${BAD}${PHP_VER} DEVELOPMENT${DEF}" ;;
            0) PHP_VER="${GOOD}${PHP_VER}${DEF} EOL: 2023-11-26" ;;
        esac
        ;;
    7)  case ${PHP_VER_SEC} in
            4) PHP_VER="${GOOD}${PHP_VER}${DEF} EOL: 2022-11-28" ;;
            3) PHP_VER="${WARN}${PHP_VER} EOL: 2021-12-06${DEF}" ;;
            2) PHP_VER="${BAD}${PHP_VER} EOL: 2020-11-30${DEF}" ;;
            1) PHP_VER="${BAD}${PHP_VER} EOL: 2019-12-01${DEF}" ;;
            0) PHP_VER="${BAD}${PHP_VER} EOL: 2019-01-10${DEF}" ;;
        esac
        ;;
    5)  case ${PHP_VER_SEC} in
            6) PHP_VER="${BAD}${PHP_VER} EOL: 2018-12-31${DEF}" ;;
            5) PHP_VER="${BAD}${PHP_VER} EOL: 2016-07-21${DEF}" ;;
            4) PHP_VER="${BAD}${PHP_VER} EOL: 2015-09-03${DEF}" ;;
            [0-3]) PHP_VER="${BAD}${PHP_VER} EOL: Prior 2014${DEF}" ;;
        esac
        ;;
esac
echo -e "Default PHP: ${PHP_VER}"

SECTION_TITLE "Exim"

# Figure out what the mail ip is
# If the mailips file is not empty,
# then whatever has been set up for *: is the main mail IP.
if [[ -s /etc/mailips ]]; then
    MAILIP="$(grep "*:" /etc/mailips | awk '{print $2}')"
else
    MAILIP="${MAIN_IP}"
fi
echo -e "Main Mail IP: ${INFO}${MAILIP}${DEF}"

# PTR of the mail ip
# This will turn red if the PTR of the mail IP
# does not match the hostname, which should concern you.
PTR="$(dig @ns2.inmotionhosting.com -x ${MAILIP} +short)"
if ! [[ "$(hostname)." == "$PTR" ]]; then
    PTR=${BAD}${PTR}${DEF}
fi
echo -e "PTR: ${PTR}"

# Exim queue
# This will turn red if the queue is greater than 100
QUEUE="$(exim -bpc)"
if [[ ${QUEUE} -gt 50 ]]; then
    QUEUE=${WARN}${QUEUE}${DEF}
elif [[ ${QUEUE} -gt 100 ]]; then
    QUEUE=${BAD}${QUEUE}${DEF}
elif [[ ${QUEUE} -gt 500 ]]; then
    QUEUE=${QUEUE}${DEF}
fi
echo -e "Queue Size: ${QUEUE}"

SECTION_TITLE "Disk"

# We need some red color when disk space is higher than 90%.
# This is going to be a little tricky.
IFS=$'\n'

# Disk space
df_result="$(df -h --type ext4 | grep -v /home/virtfs)"
# Separate headers from results to parse
dfhead="$(head -n1 <<< "${df_result}")"
devdisks="$(tail -n+2 <<< "${df_result}")"
echo -e ${dfhead}
for devdisk in ${devdisks}; do
    devdisk_percent="$( {
        awk '{print $5}' <<< "${devdisk}"
        } | tr -d '%'
        )"
    if [[ ${devdisk_percent} -gt '80' ]] && [[ ${devdisk_percent} -lt '90' ]]; then
        devdisk="${WARN}${devdisk}${DEF}"
    elif [[ ${devdisk_percent} -gt '90' ]]; then
        devdisk="${BAD}${devdisk}${DEF}"
    fi
    echo -e "${devdisk}"
done
echo -ne "\n"

# Inodes
idf="$(df -hi --type ext4 | grep -v /home/virtfs)"
# Separate headers from results to parse
idfhead="$(head -n1 <<< "${idf}")"
idevdisks="$(tail -n+2 <<< "${idf}")"
echo ${idfhead}
for idevdisk in ${idevdisks}; do
    idevdisk_percent="$( awk '{print $5}' <<< ${idevdisk} | tr -d '%')"
    if [[ ${idevdisk_percent} -gt '80' ]] && [[ ${idevdisk_percent} -lt '90' ]]; then
        devdisk="${WARN}${devdisk}${DEF}"
    elif [[ ${idevdisk_percent} -gt '90' ]]; then
        devdisk="${BAD}${devdisk}${DEF}"
    fi
    echo -e "${idevdisk}"
done
echo -ne "\n"
unset IFS

SECTION_TITLE "Failed Services Check"
### Service checks
# Service check, warn if these are NOT running
DEFAULT_SERVICES=(httpd exim mysql dovecot dnsadmin pure-ftpd)
for SERVICE_CHK in "${DEFAULT_SERVICES[@]}"; do
    if [[ ${SERVICE_CHK_CMD} == "service" ]]; then
        pgrep ${SERVICE_CHK} > /dev/null
        case $? in
            0)  ;; # Do nothing. PID found.
            [1-3])  CHECK_FTP_SERVICE $SERVICE_CHK ;;
        esac
    else
        systemctl is-active ${SERVICE_CHK} --quiet
        case $? in
            0)  ;; # Do nothing. Service is active.
            [1-3])  CHECK_FTP_SERVICE $SERVICE_CHK ;;
        esac
    fi
done
echo -e "Complete!"

SECTION_TITLE "Extra Services Check"

# Custom Services - Warn if these are running
CUSTOM_SERVICES=(cpanel_php_fpm ea-php54-php-fpm ea-php55-php-fpm ea-php56-php-fpm)
CUSTOM_SERVICES+=(ea-php70-php-fpm ea-php71-php-fpm ea-php72-php-fpm ea-php73-php-fpm)
CUSTOM_SERVICES+=(ea-php74-php-fpm ea-php80-php-fpm varnish redis memcached)
CUSTOM_SERVICES+=(tomcat java searchd node postgres mongo elasticsearch cphulkd)
CUSTOM_SERVICES+=(postgresql-10 nginx)
for SERVICE_CHK in "${CUSTOM_SERVICES[@]}"; do
    if [[ $SERVICE_CHK_CMD == "service" ]]; then
        pgrep -f ${SERVICE_CHK} > /dev/null
        if [[ "$?" == 0 ]]; then
            echo -e "${INFO}(i) ${SERVICE_CHK} is RUNNING${DEF}"
        fi
    else
        systemctl is-active ${SERVICE_CHK} --quiet
        if [[ "$?" == 0 ]]; then
            # If it's NGINX, since customers can install EasyApache NGINX via EasyApache,
            # report which NGINX it is. This can alert the tech to know what they're dealing
            # with and prevent a delay in support since there's a difference in IMH NGINX,
            # EasyApache NGINX and Engintron.
            if [[ "${SERVICE_CHK}" == "nginx" ]]; then
                NGINX_LIST=(imh-nginx ea-nginx nginx)
                for NGX in "${NGINX_LIST[@]}"; do
                    RESP=$(rpm -qa $NGX)
                    if [[ ! -z $RESP ]]; then
                        if [[ $NGX == "nginx" ]]; then
                            # Check if Engintron.  If so, then /usr/local/src/engintron exists.
                            if [ -d "/usr/local/src/engintron" ]; then
                                NGINX_TYPE+="engintron "
                            else
                                NGINX_TYPE+="${NGX} "
                            fi
                        else
                            NGINX_TYPE+="${NGX} "
                        fi
                    fi
                done
                # Now, make sure it's not some crazy thing where more than one NGINX is installed.
                # After all, it's possible.
                NGX_LENGTH=$(echo ${NGINX_TYPE} | wc -w)
                if [ $NGX_LENGTH -gt 1 ]; then
                    echo "${WARN}More than one varient of NGINX is installed. Found RPMs: $NGINX_TYPE${DEF}"
                else
                    SERVICE_CHK=$(echo ${NGINX_TYPE})
                fi
            fi
            echo -e "${INFO}(i) ${SERVICE_CHK} is RUNNING${DEF}"
        fi
    fi
done
echo -e "Complete!"

echo -e "\n"

exit 0
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