尊龙凯时人生就是博

Linux Systemd Crontabʵ¼ùÖ¸ÄÏ£ºÔõÑùÓÅ»¯ºÍµ÷½â׼ʱʹÃü

Linux Systemd Crontabʵ¼ùÖ¸ÄÏ£ºÔõÑùÓÅ»¯ºÍµ÷½â׼ʱʹÃü

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ÔÚLinuxϵͳÖУ¬×¼Ê±Ê¹ÃüÊÇÒ»ÏîºÜÊÇÖ÷ÒªµÄ¹¦Ð§¡£¶øÔÚSystemdϵͳÏ£¬Crontab׼ʱʹÃüÖÎÀíÆ÷ÊÇÒ»ÖÖ¿ÉÒÔÌṩ׼ȷ¡¢ÎÞаºÍ¿ÉÉèÖõÄ׼ʱʹÃüÖÎÀí¹¤¾ß¡£±¾ÎĽ«ÏÈÈÝÔõÑùͨ¹ýSystemd Crontab¾ÙÐÐ׼ʱʹÃüµÄÓÅ»¯ºÍµ÷½â£¬Í¬Ê±ÌṩÏêϸµÄ´úÂëʾÀý¹©¶ÁÕ߲ο¼¡£

I. Systemd Crontab¼ò½é

Systemd CrontabÊÇLinuxϵͳϵÄÒ»¸öcron¹¤¾ß£¬ËüÊÇÓÉSystemdϵͳÖÎÀíÆ÷ÌṩµÄÒ»ÖÖ¸üÏÖ´ú»¯µÄÌæ»»ÒªÁì¡£Ïà½ÏÓڹŰåµÄcron¹¤¾ß£¬Systemd Crontab¾ßÓиüÇ¿Ê¢µÄ¹¦Ð§ºÍ¸üÎÞаµÄÉèÖÃÑ¡Ïî¡£

II. Systemd CrontabµÄ×°ÖÃÓëÉèÖÃ

×°ÖÃSystemd Crontab

Ôڴ󲿷ÖLinux¿¯ÐаæÖУ¬Systemd CrontabÊÇĬÈÏ×°ÖõÄ¡£ÈôÊÇÄúµÄϵͳÖÐûÓÐ×°Öøù¤¾ß£¬¿ÉÒÔͨ¹ý°ü¹ÜÀíÆ÷¾ÙÐÐ×°Öã¬ÒÔUbuntuΪÀý£º

sudo apt-get update
sudo apt-get install cronie

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ÉèÖÃSystemd Crontab

Systemd CrontabµÄÉèÖÃÎļþλÓÚ/etc/cron.dĿ¼Ï£¬Ã¿Ò»¸öʹÃüÕ¼ÓÐÒ»¸öÎļþ¡£½¨ÉèÒ»¸öеÄʹÃüÎļþ£¬ÀýÈçmytask.cron£º

sudo nano /etc/cron.d/mytask.cron

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ÔÚmytask.cronÖУ¬ÊäÈëÒÔÏÂÄÚÈݲ¢ÉúÑÄ£º

# m h dom mon dow user  command
*/10 * * * * root /path/to/mytask.sh

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ÉÏÊöÉèÖÃÌåÏÖÿ¸ô10·ÖÖÓÖ´ÐÐÒ»´Îmytask.sh¡£ÏêϸµÄʱ¼äÉèÖÃÇë²Î¿¼Cron±í´ïʽ¡£

III. Systemd Crontab³£ÓÃÏÂÁîÓëÉèÖÃ

Éó²é׼ʱʹÃüÈÕÖ¾

sudo journalctl -u cron.service

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ͨ¹ý¸ÃÏÂÁî¿ÉÒÔÉó²éSystemd CrontabµÄÔËÐÐÈÕÖ¾£¬Àû±ãÅŲé׼ʱʹÃüÖ´ÐÐÒì³£µÄÎÊÌâ¡£

ÖØÆôSystemd CrontabЧÀÍ

sudo systemctl restart cron.service

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ÔÚÐÞ¸ÄÁËSystemd CrontabµÄÉèÖÃÖ®ºó£¬ÐèÒªÖØÆôЧÀÍʹÉèÖÃÉúЧ¡£

IV. Systemd CrontabµÄÓÅ»¯Óëµ÷½â

µ÷½âʹÃüÖ´ÐÐ˳Ðò

ÔÚSystemd CrontabÖУ¬¿ÉÒÔΪÿ¸öʹÃüÎļþÉèÖÃÓÅÏȼ¶£¬´Ó¶øµ÷½âʹÃüµÄÖ´ÐÐ˳Ðò¡£ÔÚʹÃüÎļþµÄÎļþÃûÖмÓÈëÊý×Öǰ׺£¬Êý×ÖԽС£¬ÓÅÏȼ¶Ô½¸ß¡£ÀýÈ磬ÈôÊÇÄãÏ£ÍûÓÅÏÈÖ´ÐÐmytask.cron£¬¿ÉÒÔ½«ÆäÎļþÃûÐÞ¸ÄΪ01-mytask.cron¡£

×ÊÔ´ÏÞÖÆÓëÏÞÖÆÌõ¼þ

ÔÚSystemd CrontabÖУ¬¿ÉÒÔͨ¹ýÔÚʹÃüÎļþÖÐÌí¼Ó×ÊÔ´ÏÞÖƺÍÏÞÖÆÌõ¼þÀ´ÓÅ»¯×¼Ê±Ê¹ÃüµÄÖ´ÐС£ÀýÈ磬¿ÉÒÔÉèÖÃʹÃüµÄÄÚ´æÏÞÖÆ¡¢CPUʹÓÃÏÞÖƵÈ¡£ÏêϸµÄÉèÖÃÇë²Î¿¼SystemdÎĵµ¡£

²¢ÐÐÖ´ÐÐʹÃü

ÈôÊÇϵͳÖÐÓжà¸ö׼ʱʹÃüÐèҪͬʱִÐУ¬²¢ÇÒ²»Ï£ÍûËüÃÇÏ໥ӰÏ죬¿ÉÒÔ½«ÕâЩʹÃü»®·Ö°²ÅÅÔÚ²î±ðµÄʹÃüÎļþÖС£Systemd Crontab»á×Ô¶¯²¢ÐÐÖ´ÐÐÕâЩʹÃü¡£

ÔöÌíʹÃüËø¶¨

ΪÁË×èֹij¸öʹÃüÖظ´Ö´Ðлò±»Í¬Ê±Ö´Ðжà´Î£¬¿ÉÒÔÔÚʹÃüÎļþÖÐÌí¼ÓËø¶¨¹¦Ð§¡£Ôھ籾ÖÐʹÓÃÎļþËø£¬Ö»Óе±ÎļþËø²»±£´æʱ²ÅÖ´ÐÐʹÃü¡£Ê¾Àý´úÂëÈçÏ£º

#!/bin/bash
lockfile=/tmp/mytask.lock
if ( set -o noclobber; echo "$$" > "$lockfile") 2> /dev/null; then
 trap 'rm -f "$lockfile"; exit $?' INT TERM EXIT
 # ʹÃüÖ´ÐдúÂë
 rm -f "$lockfile"
else
 echo "Task is already running"
 exit 1
fi

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V. ½áÓï

ͨ¹ýSystemd Crontab£¬ÎÒÃÇ¿ÉÒÔÔ½·¢ÎÞаºÍ׼ȷµØÉèÖúÍÖÎÀí׼ʱʹÃü¡£±¾ÎĶÔSystemd CrontabµÄ×°Öá¢ÉèÖúÍÓÅ»¯¾ÙÐÐÁËÏêϸÏÈÈÝ£¬²¢ÌṩÁËÏêϸµÄ´úÂëʾÀý¹©¶ÁÕ߲ο¼¡£Ï£Íû¶ÁÕßÄܹ»Í¨¹ý±¾ÎĵÄÖ¸µ¼£¬¸üºÃµØÓ¦ÓÃSystemd CrontabÀ´¾ÙÐÐ׼ʱʹÃüµÄÖÎÀíºÍÓÅ»¯¡£

ÒÔÉϾÍÊÇLinux Systemd Crontabʵ¼ùÖ¸ÄÏ£ºÔõÑùÓÅ»¯ºÍµ÷½â׼ʱʹÃüµÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

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