alert

#!/bin/bash

## Tiny bash wrapper to manage a locally-installed
## prometheus: alertmanager service, with all needed
## configuration options handled automatically in-script.

############################################################
## YOUR VALUES ##
#################

# Your user home directory, used as basis for other file paths:
USR="/Users/andf"

# Prometheus-specific configuration options:
ALERTBIN="$USR/bin/alertmanager"
ALERTCONF="$USR/etc/prometheus/alertmanager.yml"
ALERTLOG="$USR/log/prometheus/alertmanager.log"
ALERTWEB="localhost:9093"

############################################################
## BEGIN SCRIPT ##
##################

## Check for provided parameter:
PARAMETER=$1

# Parse user-provided parameter and determine what to do:
if [ -z $PARAMETER ]; then
   echo -e "\nERROR: No parameter provided. You must provide one of:"
   echo -e "     - start: start the local alertmanager service"
   echo -e "     - stop: stop the local alertmanager service"
   echo -e "     - restart: restart the local alertmanager service"
   echo -e "     - status: check the status of the local alertmanager service"
   echo -e "     - web: launch the running alertmanager web interface"
   echo -e "     - conf: read/edit the alertmanager conf file"
   echo -e "     - log: read the current alertmanager log"
   echo -e "       Exiting ...\n"
   exit;
elif [ ! -z $2 ]; then
   echo -e "\nERROR: Too many parameters provided. You must provide one of:"
   echo -e "     - start: start the local alertmanager service"
   echo -e "     - stop: stop the local alertmanager service"
   echo -e "     - restart: restart the local alertmanager service"
   echo -e "     - status: check the status of the local alertmanager service"
   echo -e "     - web: launch the running alertmanager web interface"
   echo -e "     - conf: read/edit the alertmanager conf file"
   echo -e "     - log: read the current alertmanager log"
   echo -e "       Exiting ...\n"
   exit;
elif [[ "$PARAMETER" =~ ^(start|START|Start)$ ]]; then
   START=1
elif [[ "$PARAMETER" =~ ^(stop|STOP|Stop)$ ]]; then
   STOP=1
elif [[ "$PARAMETER" =~ ^(restart|RESTART|Restart)$ ]]; then
   RESTART=1
elif [[ "$PARAMETER" =~ ^(status|STATUS|Status|check|CHECK|Check)$ ]]; then
   STATUS=1
elif [[ "$PARAMETER" =~ ^(web|WEB|Web)$ ]]; then
   WEB=1
elif [[ "$PARAMETER" =~ ^(conf|CONF|Conf)$ ]]; then
   CONF=1
elif [[ "$PARAMETER" =~ ^(log|LOG|Log)$ ]]; then
   LOG=1
else
   echo -e "\nERROR: Unable to parse input. You must provide one of:"
   echo -e "     - start: start the local alertmanager service"
   echo -e "     - stop: stop the local alertmanager service"
   echo -e "     - restart: restart the local alertmanager service"
   echo -e "     - status: check the status of the local alertmanager service"
   echo -e "     - web: launch the running alertmanager web interface"
   echo -e "     - conf: read/edit the alertmanager conf file"
   echo -e "     - log: read the current alertmanager log"
   echo -e "       Exiting ...\n"
   exit;
fi

## Gather data on currently-running alertmanager instance, if any:
ALERTPROC=`ps aux | grep -i alertmanager | grep -v grep`
ALERTPROCCOUNT=`echo $ALERTPROC | grep -c 'alertmanager.yml'`
ALERTPROCPID=`echo $ALERTPROC | awk '{print $2}'`

# Perform requested task:
if [ $START ]; then
   if [ `echo $ALERTPROCCOUNT` -gt 0 ]; then
      echo -e "\nERROR: Alertmanager service already running:\n"
      echo -e $ALERTPROC
      echo ""
   else
      echo -e "\nStarting Alertmanager ..."
      $ALERTBIN --config.file=$ALERTCONF 2> $ALERTLOG &
      sleep 2
      tail -1 $ALERTLOG
      echo ""
   fi
elif [ $STOP ]; then
   if [ `echo $ALERTPROCCOUNT` -lt 1 ]; then
      echo -e "\nAlertmanager service not running\n"
   else
      echo -e "\nStopping Alertmanager ..."
      kill $ALERTPROCPID > /dev/null 2>&1
      echo ""
      echo "   ... done!"
      echo ""
   fi
elif [ $RESTART ]; then
   echo -e "\nRestarting Alertmanager ..."
   kill $ALERTPROCPID > /dev/null 2>&1
   sleep 1
   $ALERTBIN --config.file=$PROMCONF 2> $ALERTLOG &
   sleep 2
   tail -1 $ALERTLOG
   echo ""
elif [ $STATUS ]; then
   if [ `echo $ALERTPROCCOUNT` -lt 1 ]; then
      echo -e "\nAlertmanager service not running\n"
   else
      echo ""
      echo $ALERTPROC
      echo ""
   fi
elif [ $WEB ]; then
   open http://$ALERTWEB
elif [ $CONF ]; then
   nano $ALERTCONF
   echo ""
elif [ $LOG ]; then
   tail -100 $ALERTLOG
   echo ""
else
   echo "ERROR: Not possible to get here"
fi

exit;