Circus start/stop/restart for more than one watcher at once

circustool

#!/bin/bash
run_circusctl() {
    for i in {1..50}
    do
        OUT=$(circusctl $@ 2>&1)
        if [ "$OUT" = "ok" ]
        then
            echo >&2
            return
        elif [ $(echo "$OUT" | grep 'error: arbiter is already running ' | wc -l) = 1 ]
        then
            echo -n " ." >&2
            sleep 0.1
        else
            echo " $OUT" >&2
            exit 1
        fi
    done
    echo " timed out" >&2
    exit 1
}

reverse() {
    REV=""
    for x in $1
    do
        REV="$x $REV"
    done
    echo "$REV"
}

usage() {
    echo "Usage: $0 <start|stop|restart> <watcher name>" >&2
    exit 1
}

start() {
    for watcher in $(reverse "$WATCHER")
    do
        echo -n "Starting $NAME-$watcher" >&2
        run_circusctl start "$NAME-$watcher"
    done
}

stop() {
    for watcher in $WATCHER
    do
        echo -n "Stopping $NAME-$watcher" >&2
        run_circusctl stop "$NAME-$watcher"
        REV="$watcher $REV"
    done
}

restart() {
    stop
    start
}


[ "$2" = "" ] && usage
NAME="$2"
CONF=/etc/circus/conf.d
WATCHER=$(
    for watcher in $(ls "$CONF" | egrep "^watcher-$NAME-")
    do
        PRIORITY=$(grep ^priority "$CONF/$watcher" | sed -e 's/^priority.*=[^0-9]*//')
        echo "$PRIORITY $watcher"
    done | sort -n | awk '{print $2}' | sed -e "s/^watcher-$NAME-\(.*\)\.ini\$/\\1/"
)

case $1 in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    *)
        usage
        ;;
esac