mainProcess

#/bin/ash
# set -x
echo `date "+%Y-%m-%d %H:%M:%S"` " start agent">/dev/stdout


MAIIL_PRO_DIR=/progs           # servce log path
PORT=3903                       # port
POLL_LOG_INTERVAL=15s           # poll_log_interval
BEFORE_LOG_PAHT=" "


start(){
    mtail $LOGPATH -progs $MAIIL_PRO_DIR  -port=$PORT -poll_log_interval=$POLL_LOG_INTERVAL -logtostderr &
}



load_log_path(){
    # load service log path
    LOGPATH=
    for file in `ls ${MAIIL_PRO_DIR} | grep ".mtail"`
    do
        _LOGPATH=`grep log_filepath ${MAIIL_PRO_DIR}/${file} | grep log_filepath| sed s/[[:space:]]//g | awk -F = '{printf(" -logs %s ",$2)}'`
        LOGPATH="${LOGPATH} ${_LOGPATH}"
    done
    echo `date "+%Y-%m-%d %H:%M:%S"` " LOGPATH="$LOGPATH
}


while [ "1" = "1" ]
do
    load_log_path

    # configuration changes
    if [ ${#LOGPATH} -gt 2 ] && [ "${BEFORE_LOG_PAHT}" != "${LOGPATH}" ]
    then
        echo `date "+%Y-%m-%d %H:%M:%S"` " reload agent config"
        pkill mtail
        start
        BEFORE_LOG_PAHT=${LOGPATH}
        sleep 10s
    fi


    # Check if process is alive when logpath is not empty
    pid=$(ps aux | grep mtail | grep -v grep | awk '{print $1}')
    if [ "$pid" == "" ] && [ ${#LOGPATH} -ne 0 ]
    then
        echo `date "+%Y-%m-%d %H:%M:%S"` " restart agent"
        start
    fi

    if [ "$pid" == "" ]
    then
        echo `date "+%Y-%m-%d %H:%M:%S"` " agent is dead..."
    else
        echo `date "+%Y-%m-%d %H:%M:%S"` " agent is running..."
    fi

    # When monitoring is deleted
    if [ ${#LOGPATH} -eq 1 ] && [ "${#BEFORE_LOG_PAHT}" -ne 0 ] && [ "$pid" != "" ]
    then
            echo `date "+%Y-%m-%d %H:%M:%S"` " kill agent "
            kill -9 $pid
    fi
    sleep 1m
done