shell脚本自动删除30天以前的文件(最新推荐)

#!/bin/bash
target_dir="/data/dbbak"
timestamp=$(date +%s -d "30 days ago")
for file in "${target_dir}"/*
do
    if [[ -f "${file}" && $(date +%s -r "${file}") -lt "${timestamp}" ]]
    then
        rm -f "${file}"
        echo "deleted file: ${file}"
    fi
done

searchindex=filebeat
elastic_url=192.168.98.136
elastic_port=9200
saveday=7
date2stamp () {
    date --utc --date "$1" +%s
}
datediff (){
    case $1 in
        -s)   sec=1;      shift;;
        -m)   sec=60;     shift;;
        -h)   sec=3600;   shift;;
        -d)   sec=86400;  shift;;
        *)    sec=86400;;
    esac
    dte1=$(date2stamp $1)
    dte2=$(date2stamp $2)
    diffsec=$((dte2-dte1))
    if [ ${diffsec} -lt 0 ]; then abs=-1; else abs=1; fi
    echo $((diffsec/sec*abs))
}
for index in $(curl -s "${elastic_url}:${elastic_port}/_cat/indices?v" | grep  "${searchindex}" | grep "_log-20[0-9][0-9]\.[0-1][0-9]\.[0-3][0-9]" | awk '{print$3}'); do
        date=$(echo ${index##*-} | sed 's/\./-/g')
        cond=$(date +%y-%m-%d)
        diff=$(datediff -d $date $cond)
        echo -n "${index}****diff**** (${diff})"
        if [ $diff -gt ${saveday} ]; then
          echo "!!!delete ${index}"
          curl -xdelete "${elastic_url}:${elastic_port}/${index}?pretty"
        else
          echo ""
        fi
done

crontab -e
# 添加以下内容
00 03 * * * /usr/local/elk/elasticsearch-8.17.0/delete_es_by_day.sh > /dev/null 2>&1
#验证是否已添加
crontab -l|tail -2