Add script 'check_dhcp.sh'.
This commit is contained in:
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3ce0e5e170
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263
check_dhcp.sh
Executable file
263
check_dhcp.sh
Executable file
@ -0,0 +1,263 @@
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#!/usr/bin/env bash
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# - Which Service should be checkked
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# -
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# - This parameter MUST be given
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# -
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_service_name="DHCP"
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# - The binary of the service
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# -
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# - If not given, script dries to determin it.
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# -
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_check_binary="$(which dhcpd)"
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# - The systemd service file
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# -
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# - If not given, script dries to determin it.
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#
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#_SYSTEMD_SERVICE="isc-dhcp-server"
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# - The sysv init script of the service
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# -
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# - If not given, script dries to determin it.
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#
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_SYSV_INIT_SCRIPT="isc-dhcp-server"
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#---------------------------------------
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#-----------------------------
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# Base Function(s)
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#-----------------------------
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#---------------------------------------
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fatal(){
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echo ""
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if $terminal ; then
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echo -e " [ \033[31m\033[1mFatal\033[m ] $*"
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else
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echo -e " [ Fatal ] $*"
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fi
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echo ""
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if $terminal ; then
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echo -e " \033[1mScript terminated\033[m.."
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else
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echo -e " Script terminated.."
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fi
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echo ""
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rm -rf $LOCK_DIR
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exit 1
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}
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error (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[31m\033[1mError\033[m ] $*"
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else
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echo " [ Error ] $*"
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fi
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echo ""
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}
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warn (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[33m\033[1mWarn\033[m ] $*"
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else
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echo " [ Warn ] $*"
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fi
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echo ""
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}
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info (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[32m\033[1mInfo\033[m ] $*"
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else
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echo " [ Info ] $*"
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fi
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echo ""
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}
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ok (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[32m\033[1mOk\033[m ] $*"
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else
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echo " [ Ok ] $*"
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fi
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echo ""
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}
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trim() {
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local var="$*"
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var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
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var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
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echo -n "$var"
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}
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#---------------------------------------
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#-----------------------------
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# Check some prerequisites
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#-----------------------------
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#---------------------------------------
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LOCK_DIR=`mktemp -d`
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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terminal=true
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LOGGING=true
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else
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terminal=false
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LOGGING=false
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fi
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if [[ -n "$_service_name" ]]; then
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service_name=$_service_name
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else
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fatal "$(basename $0): No Service given"
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fi
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# - Is Service installed ?
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# -
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if [[ -z "$_check_binary" ]]; then
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_check_binary="$(which ${service_name,,}d)"
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if [[ -z "$_check_binary" ]] ; then
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_check_binary="$(which ${service_name,,})"
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fi
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fi
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if [[ -z "$_check_binary" ]]; then
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fatal "$(basename $0): $service_name Service seems NOT to be installed"
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else
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check_binary="$_check_binary"
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check_string_ps="$check_binary"
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fi
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# - Systemd supported ?
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# -
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systemd=$(which systemd)
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systemctl=$(which systemctl)
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systemd_supported=false
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if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
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systemd_supported=true
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fi
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SYSTEMD_SERVICE=
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SYSV_INIT_SCRIPT=
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if $systemd_supported ; then
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if [[ -n "$_SYSTEMD_SERVICE" ]] ; then
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if systemctl -t service list-unit-files \
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| grep -e "^$_SYSTEMD_SERVICE" \
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| grep -q -E "(enabled|disabled)" 2> /devnull ; then
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SYSTEMD_SERVICE="$(systemctl -t service list-unit-files | grep -e "^$_SYSTEMD_SERVICE" | awk '{print$1}' | head -1)"
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fi
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else
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if systemctl -t service list-unit-files \
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| grep -e "^${service_name,,}d" \
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| grep -q -E "(enabled|disabled)" 2> /devnull ; then
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SYSTEMD_SERVICE="$(systemctl -t service list-unit-files | grep -e "^${service_name,,}d" | awk '{print$1}' | head -1)"
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elif systemctl -t service list-unit-files \
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| grep -e "^${service_name,,}" \
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| grep -q -E "(enabled|disabled)" 2> /devnull ; then
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SYSTEMD_SERVICE="$(systemctl -t service list-unit-files | grep -e "^${service_name,,}" | awk '{print$1}' | head -1)"
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fi
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fi
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fi
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if [[ -z "$SYSTEMD_SERVICE" ]]; then
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if [[ -n "$_SYSV_INIT_SCRIPT" ]]; then
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if [[ -x "/etc/init.d/$_SYSV_INIT_SCRIPT" ]]; then
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SYSV_INIT_SCRIPT="/etc/init.d/$_SYSV_INIT_SCRIPT"
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fi
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fi
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if [[ -z "$SYSV_INIT_SCRIPT" ]] ; then
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if [[ -x "/etc/init.d/${service_name,,}" ]]; then
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SYSV_INIT_SCRIPT="/etc/init.d/${service_name,,}"
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elif [[ -x "/etc/init.d/${service_name,,}d" ]]; then
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SYSV_INIT_SCRIPT="/etc/init.d/${service_name,,}d"
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fi
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fi
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fi
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if [[ -z "$SYSTEMD_SERVICE" ]] && [[ -z "$SYSV_INIT_SCRIPT" ]] ; then
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fatal "Neither an init-script nor a service file for $service_name found!"
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fi
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#---------------------------------------
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#-----------------------------
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# Check if SSH service is running
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#-----------------------------
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#---------------------------------------
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if $LOGGING ; then
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echo -e "\n Check if $service_name service is running.."
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echo -e " ================================="
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fi
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if ! ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}" | grep -v grep > /dev/null ; then
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error "$service_name service seems to be down! Trying to restart service now.."
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if [[ -n "$SYSTEMD_SERVICE" ]] ; then
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$systemctl daemon-reload > /dev/null 2> ${LOCK_DIR}/err_msg.log
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if [[ $? -ne 0 ]]; then
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error "$(cat ${LOCK_DIR}/err_msg.log)"
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fi
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sleep 2
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$systemctl stop $SYSTEMD_SERVICE > /dev/null 2> ${LOCK_DIR}/err_msg.log
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if [[ $? -ne 0 ]]; then
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error "$(cat ${LOCK_DIR}/err_msg.log)"
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fi
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sleep 10
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$systemctl start $SYSTEMD_SERVICE > /dev/null 2> ${LOCK_DIR}/err_msg.log
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if [[ $? -ne 0 ]]; then
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error "$(cat ${LOCK_DIR}/err_msg.log)"
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fi
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else
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$SYSV_INIT_SCRIPT stop > /dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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error "Stopping $service_name service failed!"
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fi
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sleep 10
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$SYSV_INIT_SCRIPT start > /dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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error "Starting $service_name service failed!"
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fi
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fi
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declare -i counter=0
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PID=$(ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}"| grep -v grep | awk '{print$2}')
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while [[ "X${PID}" = "X" ]]; do
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sleep 1
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PID=$(ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}"| grep -v grep | awk '{print$2}')
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if [[ $counter -gt 10 ]]; then
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break
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else
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((counter++))
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fi
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done
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if [[ "X${PID}" = "X" ]] ; then
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error "Restarting $service_name service failed!"
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else
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ok "$service_name service is up and running."
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fi
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else
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if $LOGGING ; then
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ok "$service_name service is up and running."
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fi
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fi
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rm -rf $LOCK_DIR
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exit 0
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