start-alertmanager.sh

#!/usr/bin/env bash

. versions.sh
if [ -f env.sh ]; then
	. env.sh
fi

is_podman="$(docker --help | grep -o podman)"
RULE_FILE=$PWD/prometheus/rule_config.yml
DOCKER_PARAM=""
BIND_ADDRESS=""
ALERTMANAGER_COMMANDS=""
ALERT_MANAGER_DIR=""
USER_PERMISSIONS=""
usage="$(basename "$0") [-h] [-p alertmanager port ] [-l] [-D encapsulate docker param] [-C alertmanager commands] [-r rule-file] [-f alertmanager-dir]"
if [ "$(id -u)" -ne 0 ]; then
	GROUPID=$(id -g)
	USER_PERMISSIONS="-u $UID:$GROUPID"
fi
LIMITS=""
VOLUMES=""
PARAMS=""
for arg; do
	shift
	if [ -z "$LIMIT" ]; then
		case $arg in
		--limit)
			LIMIT="1"
			;;
		--volume)
			LIMIT="1"
			VOLUME="1"
			;;
        --quick-startup)
            QUICK_STARTUP=1
            ;;
		--param)
			LIMIT="1"
			PARAM="1"
			;;
		*)
			set -- "$@" "$arg"
			;;
		esac
	else
		DOCR=$(echo $arg | cut -d',' -f1)
		VALUE=$(echo $arg | cut -d',' -f2- | sed 's/#/ /g')
		NOSPACE=$(echo $arg | sed 's/ /#/g')
		if [ "$PARAM" = "1" ]; then
			if [ -z "${DOCKER_PARAMS[$DOCR]}" ]; then
				DOCKER_PARAMS[$DOCR]=""
			fi
			DOCKER_PARAMS[$DOCR]="${DOCKER_PARAMS[$DOCR]} $VALUE"
			PARAMS="$PARAMS --param $NOSPACE"
			unset PARAM
		else
			if [ -z "${DOCKER_LIMITS[$DOCR]}" ]; then
				DOCKER_LIMITS[$DOCR]=""
			fi
			if [ "$VOLUME" = "1" ]; then
				SRC=$(echo $VALUE | cut -d':' -f1)
				DST=$(echo $VALUE | cut -d':' -f2-)
				SRC=$(readlink -m $SRC)
				DOCKER_LIMITS[$DOCR]="${DOCKER_LIMITS[$DOCR]} -v $SRC:$DST"
				VOLUMES="$VOLUMES --volume $NOSPACE"
				unset VOLUME
			else
				DOCKER_LIMITS[$DOCR]="${DOCKER_LIMITS[$DOCR]} $VALUE"
				LIMITS="$LIMITS --limit $NOSPACE"
			fi
		fi
		unset LIMIT
	fi
done
if [ "$DOCKER_PARAM" != "" ]; then
	DOCKER_PARAM_FROM_FILE="1"
fi

while getopts ':hlp:r:D:C:f:A:' option; do
	case "$option" in
	h)
		echo "$usage"
		exit
		;;
	p)
		ALERTMANAGER_PORT=$OPTARG
		;;
	r)
		RULE_FILE=$(readlink -m $OPTARG)
		;;
	f)
		ALERT_MANAGER_DIR="$USER_PERMISSIONS -v $(readlink -m $OPTARG):/alertmanager/data:z"
		;;
	l)
		if [[ "$DOCKER_PARAM" != *"--net=host"* ]]; then
			DOCKER_PARAM="$DOCKER_PARAM --net=host"
		fi
		;;
	D)
		if [ "$DOCKER_PARAM_FROM_FILE" = "1" ]; then
			DOCKER_PARAM=""
			DOCKER_PARAM_FROM_FILE=""
		fi
		DOCKER_PARAM="$DOCKER_PARAM $OPTARG"
		;;
	C)
		ALERTMANAGER_COMMANDS="$ALERTMANAGER_COMMANDS $OPTARG"
		;;
	A)
		BIND_ADDRESS="$OPTARG:"
		;;
	:)
		printf "missing argument for -%s\n" "$OPTARG" >&2
		echo "$usage" >&2
		exit 1
		;;
	\?)
		printf "illegal option: -%s\n" "$OPTARG" >&2
		echo "$usage" >&2
		exit 1
		;;
	esac
done
if [ -z $ALERTMANAGER_PORT ]; then
	ALERTMANAGER_PORT=9093
	ALERTMANAGER_NAME=aalert
else
	ALERTMANAGER_NAME=aalert-$ALERTMANAGER_PORT
fi

docker container inspect $ALERTMANAGER_NAME >/dev/null 2>&1
if [ $? -eq 0 ]; then
	printf "\nSome of the monitoring docker instances ($ALERTMANAGER_NAME) exist. Make sure all containers are killed and removed. You can use kill-all.sh for that\n"
	exit 1
fi

if [[ ! $DOCKER_PARAM = *"--net=host"* ]]; then
	PORT_MAPPING="-p $BIND_ADDRESS$ALERTMANAGER_PORT:9093"
fi

docker run ${DOCKER_LIMITS["alertmanager"]} -d $DOCKER_PARAM -i $PORT_MAPPING \
	-v $RULE_FILE:/etc/alertmanager/config.yml:z \
	$ALERT_MANAGER_DIR \
	--name $ALERTMANAGER_NAME docker.io/prom/alertmanager:$ALERT_MANAGER_VERSION \
	$ALERTMANAGER_COMMANDS --log.level=debug --config.file=/etc/alertmanager/config.yml ${DOCKER_PARAMS["alertmanager"]} >&/dev/null

if [ $? -ne 0 ]; then
	echo "Error: Alertmanager container failed to start"
	echo "For more information use: docker logs $ALERTMANAGER_NAME"
	exit 1
fi

# Wait till Alertmanager is available
RETRIES=25
TRIES=0
if [ ! "$QUICK_STARTUP" = "1" ]; then
    until $(curl --output /dev/null -f --silent http://localhost:$ALERTMANAGER_PORT) || [ $TRIES -eq $RETRIES ]; do
    	((TRIES = TRIES + 1))
    	sleep 1 
    done
fi
if [ ! "$(docker ps -q -f name=$ALERTMANAGER_NAME)" ]; then
	echo "Error: Alertmanager container failed to start"
	exit 1
fi

AM_ADDRESS="$(docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $ALERTMANAGER_NAME):9093"
if [ "$AM_ADDRESS" = ":9093" ]; then
	if [[ $(uname) == "Linux" ]]; then
		HOST_IP=$(hostname -I | awk '{print $1}')
	elif [[ $(uname) == "Darwin" ]]; then
		HOST_IP=$(ifconfig en0 | awk '/inet / {print $2}')
	fi
	AM_ADDRESS="$HOST_IP:9093"
fi

echo $AM_ADDRESS