How to clean the JuiceFS expired metric on pushgateway automatically

[nature1995]

[nature1995]

This script can allow you to clean the JuiceFS metric and the basic metric automatically.
Please change the EXPIRATION_SECONDS(s) value

trap 'echo "got sigterm" ; exit 0' SIGTERM

EXPIRATION_SECONDS=${EXPIRATION_SECONDS:-900}
PGW_URL=${PGW_URL:-http://127.0.0.1:9091}

function convert_to_standardnotation() {
    # convert number from scientific notation to standard( ie  '1.5383780136826127e+09' )
    local -r _METRIC=$1
    local -r _VARNAME=$2
    echo $_METRIC | sed -r "s/.*${_VARNAME}=\"([^\"]*).*/\\1/g"
}

function check_metric_line(){
    local -r _line=$1
    METRIC_TIME=$(echo $_line | awk '{print $2}' )
    #echo "mtime = $_line -> $METRIC_TIME "
    METRIC_TIME=$(convert_to_standardnotation $METRIC_TIME)
    #echo "$CURRENT_TIME - $METRIC_TIME "
    METRIC_AGE_SECONDS=$((CURRENT_TIME-METRIC_TIME))

    if [ "$METRIC_AGE_SECONDS" -gt "$EXPIRATION_SECONDS" ]; then
        metricVolumnName=$(extract_pushgateway_variable "$_line" 'vol_name')
        metricMp=$(extract_pushgateway_variable "$_line" 'mp')
        metricInstance=$(extract_pushgateway_variable "$_line" 'instance')
        metricJob=$(extract_pushgateway_variable "$_line" 'job')
        echo "[INFO] job should be deleted $metricJob  - $metricInstance  age: $METRIC_AGE_SECONDS "
        curl -s -X DELETE "$PGW_URL/metrics/job/${metricJob}"
        if [ -n "$metricMp" ]; then
                echo "[INFO] job should be deleted $metricJob  - $metricInstance - $metricMp - $metricVolumnName age: $METRIC_AGE_SECONDS "
                curl -s -X DELETE "$PGW_URL/metrics/job/${metricJob}/instance/${metricInstance}/mp/${metricMp}/vol_name/${metricVolumnName}"
        fi
    fi
}

function check_expired_metric_loop(){
    export CURRENT_TIME=$(date +%s)
    METRICS_LIST=$(curl -s  $PGW_URL/metrics | egrep "^push_time_seconds")
    echo "$METRICS_LIST" | while  read -r line || [[ -n "$line" ]]; do
       check_metric_line "$line"
    done
    sleep $((EXPIRATION_SECONDS / 3 ))
}

while : ; do
check_expired_metric_loop
done