Add script 'check_systemd_service.sh'.
This commit is contained in:
parent
404cc00a02
commit
13d9eda460
277
check_systemd_service.sh
Executable file
277
check_systemd_service.sh
Executable file
@ -0,0 +1,277 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
|
||||
log_file="${LOCK_DIR}/${script_name%%.*}.log"
|
||||
|
||||
#---------------------------------------
|
||||
#-----------------------------
|
||||
# Base Function(s)
|
||||
#-----------------------------
|
||||
#---------------------------------------
|
||||
|
||||
usage() {
|
||||
|
||||
|
||||
[[ -n "$1" ]] && error "$1"
|
||||
|
||||
|
||||
[[ $terminal ]] && echo -e "
|
||||
\033[1mUsage:\033[m
|
||||
|
||||
$(basename $0) <Systemd-Service>
|
||||
|
||||
\033[1mDescription\033[m
|
||||
|
||||
Script checks if given service is running and tries to restart service
|
||||
if it is not running.
|
||||
|
||||
\033[1mOptions\033[m
|
||||
|
||||
No Options available
|
||||
|
||||
\033[1mExample:\033[m
|
||||
|
||||
Check if apache2 service is runnin. Restart service if needed.
|
||||
|
||||
$(basename $0) apache2
|
||||
|
||||
"
|
||||
|
||||
clean_up 1
|
||||
}
|
||||
|
||||
|
||||
clean_up() {
|
||||
|
||||
# Perform program exit housekeeping
|
||||
rm -rf "$LOCK_DIR"
|
||||
blank_line
|
||||
exit $1
|
||||
}
|
||||
|
||||
|
||||
fatal(){
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " [ \033[31m\033[1mFatal\033[m ] $*"
|
||||
else
|
||||
echo -e " [ Fatal ] $*"
|
||||
fi
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " \033[1mScript terminated\033[m.."
|
||||
else
|
||||
echo -e " Script terminated.."
|
||||
fi
|
||||
clean_up 1
|
||||
}
|
||||
|
||||
error (){
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " [ \033[31m\033[1mError\033[m ] $*"
|
||||
else
|
||||
echo " [ Error ] $*"
|
||||
fi
|
||||
echo ""
|
||||
}
|
||||
|
||||
warn (){
|
||||
if $LOGGING || $terminal ; then
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " [ \033[33m\033[1mWarn\033[m ] $*"
|
||||
else
|
||||
echo " [ Warn ] $*"
|
||||
fi
|
||||
echo ""
|
||||
fi
|
||||
}
|
||||
|
||||
info (){
|
||||
if $LOGGING || $terminal ; then
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " [ \033[32m\033[1mInfo\033[m ] $*"
|
||||
else
|
||||
echo " [ Info ] $*"
|
||||
fi
|
||||
echo ""
|
||||
fi
|
||||
}
|
||||
|
||||
ok (){
|
||||
if $LOGGING || $terminal ; then
|
||||
echo ""
|
||||
if $terminal ; then
|
||||
echo -e " [ \033[32m\033[1mOk\033[m ] $*"
|
||||
else
|
||||
echo " [ Ok ] $*"
|
||||
fi
|
||||
echo ""
|
||||
fi
|
||||
}
|
||||
|
||||
blank_line() {
|
||||
if $terminal ; then
|
||||
echo ""
|
||||
fi
|
||||
}
|
||||
|
||||
trim() {
|
||||
local var="$*"
|
||||
var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
|
||||
var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
|
||||
echo -n "$var"
|
||||
}
|
||||
|
||||
|
||||
# ----------
|
||||
# - Jobhandling
|
||||
# ----------
|
||||
|
||||
# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
|
||||
# -
|
||||
trap clean_up SIGHUP SIGINT SIGTERM
|
||||
|
||||
# - Create lock directory '$LOCK_DIR"
|
||||
#
|
||||
mkdir "$LOCK_DIR"
|
||||
|
||||
|
||||
|
||||
#---------------------------------------
|
||||
#-----------------------------
|
||||
# Check some prerequisites
|
||||
#-----------------------------
|
||||
#---------------------------------------
|
||||
|
||||
# - Running in a terminal?
|
||||
# -
|
||||
if [[ -t 1 ]] ; then
|
||||
terminal=true
|
||||
LOGGING=true
|
||||
else
|
||||
terminal=false
|
||||
LOGGING=false
|
||||
fi
|
||||
|
||||
if [[ -n "$1" ]] ; then
|
||||
service_name=$1
|
||||
else
|
||||
error "No Service given!"
|
||||
usage
|
||||
fi
|
||||
|
||||
|
||||
# - Systemd supported ?
|
||||
# -
|
||||
systemd=$(which systemd)
|
||||
systemctl=$(which systemctl)
|
||||
|
||||
systemd_supported=false
|
||||
if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
|
||||
systemd_supported=true
|
||||
else
|
||||
fatal "Systemd is not present!"
|
||||
fi
|
||||
|
||||
if systemctl -t service list-unit-files \
|
||||
| grep -e "^${service_name,,}d" \
|
||||
| grep -q -E "(enabled|disabled)" 2> /devnull ; then
|
||||
|
||||
SYSTEMD_SERVICE="$(systemctl -t service list-unit-files | grep -e "^${service_name,,}d" | awk '{print$1}' | head -1)"
|
||||
elif systemctl -t service list-unit-files \
|
||||
| grep -e "^${service_name,,}" \
|
||||
| grep -q -E "(enabled|disabled)" 2> /devnull ; then
|
||||
|
||||
SYSTEMD_SERVICE="$(systemctl -t service list-unit-files | grep -e "^${service_name,,}" | awk '{print$1}' | head -1)"
|
||||
fi
|
||||
|
||||
if [[ -z "$SYSTEMD_SERVICE" ]]; then
|
||||
fatal "Systemd Service '${service_name}' not found!"
|
||||
fi
|
||||
|
||||
|
||||
#---------------------------------------
|
||||
#-----------------------------
|
||||
# Check if service is running
|
||||
#-----------------------------
|
||||
#---------------------------------------
|
||||
|
||||
if $LOGGING ; then
|
||||
declare -i _length="${#service_name}"
|
||||
echo -e "\n Check if $service_name service is running.."
|
||||
echo -en " ==============================="
|
||||
declare -i i=0
|
||||
while [[ $i -lt $_length ]] ; do
|
||||
echo -n "="
|
||||
((i++))
|
||||
done
|
||||
echo ""
|
||||
fi
|
||||
|
||||
need_restart=false
|
||||
if $(systemctl is-active $SYSTEMD_SERVICE > /dev/null 2>&1) ; then
|
||||
eval $(systemctl show -p MainPID ${SYSTEMD_SERVICE})
|
||||
if [[ -n "$MainPID" ]] && [[ $MainPID -gt 0 ]]; then
|
||||
if $(ps ax | grep -q -E "^\s*${MainPID} " 2> /dev/null) ; then
|
||||
ok "$service_name service is up and running."
|
||||
else
|
||||
error "$service_name service seems to be down! Trying to restart service now.."
|
||||
need_restart=true
|
||||
fi
|
||||
else
|
||||
ok "$service_name service is up and running."
|
||||
warn "Cannot determine MainPID for Service '$service_name', but the status is 'active'."
|
||||
fi
|
||||
|
||||
else
|
||||
error "$service_name service seems to be down! Trying to restart service now.."
|
||||
need_restart=true
|
||||
fi
|
||||
|
||||
if $need_restart ; then
|
||||
|
||||
$systemctl daemon-reload > /dev/null 2> $log_file
|
||||
if [[ $? -ne 0 ]]; then
|
||||
error "$(cat $log_file)"
|
||||
fi
|
||||
sleep 2
|
||||
$systemctl stop $SYSTEMD_SERVICE > /dev/null 2> $log_file
|
||||
if [[ $? -ne 0 ]]; then
|
||||
error "$(cat $log_file)"
|
||||
fi
|
||||
sleep 10
|
||||
$systemctl start $SYSTEMD_SERVICE > /dev/null 2> $log_file
|
||||
if [[ $? -ne 0 ]]; then
|
||||
error "$(cat $log_file)"
|
||||
fi
|
||||
|
||||
sleep 5
|
||||
if $(systemctl is-active $SYSTEMD_SERVICE > /dev/null 2>&1) ; then
|
||||
eval $(systemctl show -p MainPID ${SYSTEMD_SERVICE})
|
||||
if [[ -n "$MainPID" ]] && [[ $MainPID -gt 0 ]]; then
|
||||
if $(ps ax | grep -q -E "^\s*${MainPID} " 2> /dev/null) ; then
|
||||
ok "$service_name service is now up and running. New PID is '$MainPID'"
|
||||
if ! $terminal ; then
|
||||
echo " [ Ok ] service is now up and running. New PID is '$MainPID'"
|
||||
fi
|
||||
else
|
||||
error "Restarting $service_name service failed!"
|
||||
fi
|
||||
else
|
||||
warn "Cannot determine MainPID for Service '$service_name', but the status is 'active'."
|
||||
ok "$service_name service is up and running."
|
||||
if ! $terminal ; then
|
||||
echo " [ Ok ] service is now up and running. New PID is '$MainPID'"
|
||||
echo " [ Warn ] Cannot determine MainPID for Service '$service_name', but the status is 'active'."
|
||||
fi
|
||||
fi
|
||||
else
|
||||
error "Restarting $service_name service failed!"
|
||||
fi
|
||||
|
||||
fi
|
||||
|
||||
clean_up 0
|
||||
Loading…
Reference in New Issue
Block a user