{"id":1176,"date":"2024-11-10T17:18:47","date_gmt":"2024-11-10T09:18:47","guid":{"rendered":"https:\/\/fwq.ai\/blog\/1176\/"},"modified":"2024-11-10T17:18:47","modified_gmt":"2024-11-10T09:18:47","slug":"%e6%8e%8c%e6%8f%a1-cron-%e4%bd%9c%e4%b8%9a%ef%bc%9a%e9%ab%98%e6%95%88%e5%9c%b0%e8%87%aa%e5%8a%a8%e5%8c%96%e4%bb%bb%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/1176\/","title":{"rendered":"\u638c\u63e1 Cron \u4f5c\u4e1a\uff1a\u9ad8\u6548\u5730\u81ea\u52a8\u5316\u4efb\u52a1"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173028518327328.jpg\" class=\"aligncenter\" title=\"\u638c\u63e1 Cron \u4f5c\u4e1a\uff1a\u9ad8\u6548\u5730\u81ea\u52a8\u5316\u4efb\u52a1\u63d2\u56fe\" alt=\"\u638c\u63e1 Cron \u4f5c\u4e1a\uff1a\u9ad8\u6548\u5730\u81ea\u52a8\u5316\u4efb\u52a1\u63d2\u56fe\" \/><br \/> cron \u4f5c\u4e1a\u7b80\u4ecb<br \/> cron \u4f5c\u4e1a\u662f\u8ba1\u5212\u5728\u7c7b unix \u4e0a\u6309\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\u8fd0\u884c\u7684\u547d\u4ee4\u6216\u811a\u672c\u3002\u5b83\u53ef\u4ee5\u81ea\u52a8\u6267\u884c\u91cd\u590d\u6027\u4efb\u52a1\uff0c\u4f8b\u5982\u7cfb\u7edf\u7ef4\u62a4\u3001\u5907\u4efd\u3001\u901a\u77e5\u6216\u5728\u9884\u5b9a\u4e49\u7684\u65f6\u95f4\u8fd0\u884c\u811a\u672c\u3002 cron \u4f5c\u4e1a\u4f7f\u7528 cron \u5b88\u62a4\u8fdb\u7a0b\u8fdb\u884c\u7ba1\u7406\uff0c\u786e\u4fdd\u8ba1\u5212\u4efb\u52a1\u53ef\u9760\u6267\u884c\uff0c\u65e0\u9700\u4eba\u5de5\u5e72\u9884\u3002<\/p>\n<p>cron \u4f5c\u4e1a\u5bf9\u4e8e\u9700\u8981\u81ea\u52a8\u5316\u65e5\u5e38\u6d41\u7a0b\u4ee5\u63d0\u9ad8\u6548\u7387\u5e76\u786e\u4fdd\u987a\u5229\u8fd0\u884c\u7684\u7cfb\u7edf\u7ba1\u7406\u5458\u3001\u5f00\u53d1\u4eba\u5458\u548c devops \u56e2\u961f\u6765\u8bf4\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p><strong>cron \u4f5c\u4e1a\u5982\u4f55\u5de5\u4f5c\uff1f<\/strong><br \/> cron \u7cfb\u7edf\u4f7f\u7528 crontab\uff08cron \u8868\uff09\u6765\u7ba1\u7406\u8ba1\u5212\u4efb\u52a1\u3002 crontab \u6587\u4ef6\u4e2d\u7684\u6bcf\u4e2a cron \u4f5c\u4e1a\u6761\u76ee\u6307\u5b9a\uff1a<\/p>\n<ol>\n<li> \u4efb\u52a1\u4f55\u65f6\u8fd0\u884c\uff08\u4f8b\u5982\uff0c\u6bcf\u5206\u949f\u3001\u6bcf\u5c0f\u65f6\u6216\u6bcf\u5929\uff09\u3002<\/li>\n<li> \u6b64\u65f6\u5e94\u8be5\u6267\u884c\u4ec0\u4e48\u547d\u4ee4\u6216\u811a\u672c\u3002 \u5178\u578b\u7684 cron \u8868\u8fbe\u5f0f\u9075\u5faa\u4ee5\u4e0b\u6a21\u5f0f\uff1a <\/li>\n<\/ol>\n<pre>* * * * * \/path\/to\/command-or-script\n<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u683c\u5f0f\u7531\u4e94\u4e2a\u5b57\u6bb5\u7ec4\u6210\uff0c\u540e\u8ddf\u547d\u4ee4\uff0c\u6bcf\u4e2a\u5b57\u6bb5\u5b9a\u4e49\u65f6\u95f4\u95f4\u9694\u3002<br \/> cron \u8868\u8fbe\u5f0f\u683c\u5f0f\u89e3\u91ca<br \/> \u5b57\u6bb5 \u63cf\u8ff0 \u5141\u8bb8\u503c \u793a\u4f8b<br \/> \u5206\u949f \u5c0f\u65f6\u4e2d\u7684\u5206\u949f 0\u201359 0 = \u5c0f\u65f6\u4e2d\u7684\u6700\u9ad8\u70b9<br \/> \u5c0f\u65f6 \u4e00\u5929\u4e2d\u7684\u5c0f\u65f6 0\u201323 14 = 2 pm<br \/> \u6bcf\u6708\u7684\u67d0\u4e00\u5929 \u6bcf\u6708\u7684\u7279\u5b9a\u65e5\u671f 1\u201331 15 = \u7b2c 15 \u5929<br \/> \u6708\u4efd \u4e00\u5e74\u4e2d\u7684\u6708\u4efd 1\u201312 \u6216 jan\u2013dec 7 = \u4e03\u6708<br \/> \u661f\u671f\u51e0 \u661f\u671f\u51e0 0\u20137 \u6216 sun\u2013sat\uff080 \u548c 7 = \u661f\u671f\u65e5\uff091 = \u661f\u671f\u4e00<br \/> \u793a\u4f8b cron \u4f5c\u4e1a\uff1a<br \/> \u91cd\u51fb<br \/> \u590d\u5236\u4ee3\u7801<br \/> 0 2 * * * \/home\/user\/backup.sh<br \/> \u6b64 cron \u4f5c\u4e1a\u6bcf\u5929\u51cc\u6668 2 \u70b9\u8fd0\u884c\u5e76\u6267\u884c backup.sh \u811a\u672c\u3002<br \/> cron \u4f5c\u4e1a\u7684\u7528\u4f8b<\/p>\n<ol>\n<li>\u7cfb\u7edf\u7ef4\u62a4\uff1a o \u6e05\u7406\u65e5\u5fd7\u3001\u6e05\u9664\u7f13\u5b58\u6216\u66f4\u65b0\u8f6f\u4ef6\u5305\u3002 o \u793a\u4f8b\uff1a\u6bcf\u5468\u65e5\u8fd0\u884c\u811a\u672c\u6765\u5220\u9664\u65e7\u65e5\u5fd7\u6587\u4ef6\u3002<\/li>\n<li> \u6570\u636e\u5e93\u5907\u4efd\uff1a o \u81ea\u52a8\u5907\u4efd\u6570\u636e\u5e93\u4ee5\u9632\u6b62\u3002 o \u793a\u4f8b\uff1a\u6bcf\u65e5\u5348\u591c  \u6570\u636e\u5e93\u5907\u4efd\u3002<\/li>\n<li> \u53d1\u9001\u901a\u77e5\u6216\u7535\u5b50\u90ae\u4ef6\uff1a o \u62a5\u544a\u7684\u81ea\u52a8\u8b66\u62a5\u6216\u7535\u5b50\u90ae\u4ef6\u901a\u77e5\u3002 o \u793a\u4f8b\uff1a\u6bcf\u5468\u4e00\u4e0a\u5348 8 \u70b9\u53d1\u9001\u6bcf\u5468\u9500\u552e\u62a5\u544a\u3002<\/li>\n<li> \u8fd0\u884c\u81ea\u5b9a\u4e49\u811a\u672c\uff1a o \u81ea\u52a8\u5316\u4e1a\u52a1\u6d41\u7a0b\u811a\u672c\uff0c\u4f8b\u5982\u6570\u636e\u6293\u53d6\u6216\u6587\u4ef6\u4f20\u8f93\u3002 o \u793a\u4f8b\uff1a\u6bcf 10 \u5206\u949f\u6267\u884c\u4e00\u6b21\u811a\u672c\u5c06\u6587\u4ef6\u4e0a\u4f20\u5230\u8fdc\u7a0b\u670d\u52a1\u5668\u3002 \u521b\u5efa\u548c\u7ba1\u7406 cron \u4f5c\u4e1a<\/li>\n<li> \u67e5\u770b\u73b0\u6709\u7684 cron \u4f5c\u4e1a\uff1a \u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b crontab \u6761\u76ee\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 crontab -l<\/li>\n<li> \u7f16\u8f91 crontab \u6587\u4ef6\uff1a \u8981\u521b\u5efa\u6216\u4fee\u6539 cron \u4f5c\u4e1a\uff0c\u8bf7\u6253\u5f00 crontab \u7f16\u8f91\u5668\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 crontab -e<\/li>\n<li> \u5220\u9664 cron \u4f5c\u4e1a\uff1a \u4ece crontab \u4e2d\u5220\u9664\u7279\u5b9a\u6761\u76ee\u6216\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6e05\u9664\u6240\u6709\u4f5c\u4e1a\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 crontab -r<\/li>\n<li> \u6d4b\u8bd5\u4f60\u7684 cron \u4f5c\u4e1a\uff1a \u5728\u5c06\u547d\u4ee4\u6dfb\u52a0\u5230 crontab \u4e4b\u524d\uff0c\u8bf7\u52a1\u5fc5\u624b\u52a8\u6d4b\u8bd5\u547d\u4ee4\uff0c\u4ee5\u786e\u4fdd\u5b83\u4eec\u6309\u9884\u671f\u5de5\u4f5c\u3002 \u5e38\u89c1\u4efb\u52a1\u7684 cron \u4f5c\u4e1a\u793a\u4f8b<\/li>\n<li> \u6bcf\u5206\u949f\u8fd0\u884c\u4e00\u4e2a\u811a\u672c\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801<\/li>\n<li>* * * * \/home\/user\/script.sh<\/li>\n<li> \u6bcf\u4e2a\u6708\u7b2c\u4e00\u5929\u7684\u5348\u591c\u8fd0\u884c\u4efb\u52a1\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 0 0 1 * * \/home\/user\/monthly-task.sh<\/li>\n<li> \u6bcf 5 \u5206\u949f\u8fd0\u884c\u4e00\u6b21\u4f5c\u4e1a\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 *\/5 * * * * \/home\/user\/frequent-task.sh<\/li>\n<li> \u5728\u5de5\u4f5c\u65e5\u4e0a\u5348 9 \u70b9\u8fd0\u884c\u4f5c\u4e1a\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 0 9 * * 1-5 \/home\/user\/weekday-task.sh<\/li>\n<li>\u6bcf\u5468\u65e5\u51cc\u6668 2 \u70b9\u8fd0\u884c\u5907\u4efd\u811a\u672c\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 0 2 * * 0 \/home\/user\/backup.sh \u5982\u4f55\u8c03\u8bd5 cron \u4f5c\u4e1a<\/li>\n<li>\u68c0\u67e5\u65e5\u5fd7\uff1a cron \u65e5\u5fd7\u901a\u5e38\u4f4d\u4e8e \/var\/log\/syslog \u6216 \/var\/log\/cron \u4e2d\u3002 \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 grep cron \/var\/log\/syslog<\/li>\n<li> \u5c06\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u65e5\u5fd7\u6587\u4ef6\uff1a \u5c06 cron \u4f5c\u4e1a\u7684\u8f93\u51fa\u6355\u83b7\u5230\u65e5\u5fd7\u4e2d\u4ee5\u8fdb\u884c\u6545\u969c\u6392\u9664\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801<\/li>\n<li>* * * * \/home\/user\/task.sh &gt;&gt; \/home\/user\/task.log 2&gt;&amp;1<\/li>\n<li> \u8bbe\u7f6e\u8def\u5f84\u53d8\u91cf\uff1a \u5728 cron \u4f5c\u4e1a\u4e2d\u663e\u5f0f\u6307\u5b9a\u8def\u5f84\u4ee5\u907f\u514d\u201c\u627e\u4e0d\u5230\u547d\u4ee4\u201d\u9519\u8bef\uff1a \u5df4\u4ec0 \u590d\u5236\u4ee3\u7801 \u8def\u5f84=\/usr\/bin:\/bin \u5e38\u89c1\u7684\u6311\u6218\u548c\u89e3\u51b3\u65b9\u6848 \u6311\u6218\u89e3\u51b3\u65b9\u6848 \u672a\u627e\u5230\u547d\u4ee4\u9519\u8bef \u8bbe\u7f6e\u811a\u672c\u4e2d\u547d\u4ee4\u7684\u5b8c\u6574\u8def\u5f84\u3002 \u6587\u4ef6\u6743\u9650\u4e0d\u6b63\u786e \u4f7f\u7528 chmod +x \u786e\u4fdd\u811a\u672c\u5177\u6709\u53ef\u6267\u884c\u6743\u9650\u3002 \u7f3a\u5c11\u73af\u5883\u53d8\u91cf\u76f4\u63a5\u5728 crontab \u4e2d\u5b9a\u4e49\u73af\u5883\u53d8\u91cf\u3002<\/li>\n<\/ol>\n<p>cron \u4f5c\u4e1a\u6700\u4f73\u5b9e\u8df5<br \/> \u2022 \u4f7f\u7528\u7edd\u5bf9\u8def\u5f84\uff1a\u59cb\u7ec8\u63d0\u4f9b\u547d\u4ee4\u548c\u811a\u672c\u7684\u7edd\u5bf9\u8def\u5f84\u3002<br \/> \u2022 \u8c03\u5ea6\u524d\u6d4b\u8bd5\u811a\u672c\uff1a\u624b\u52a8\u6d4b\u8bd5\u547d\u4ee4\u6216\u811a\u672c\u4ee5\u907f\u514d\u8fd0\u884c\u65f6\u9519\u8bef\u3002<br \/> \u2022 \u8bbe\u7f6e\u65e5\u5fd7\u8f93\u51fa\uff1a\u5c06\u4f5c\u4e1a\u8f93\u51fa\u6355\u83b7\u5230\u65e5\u5fd7\u4e2d\u4ee5\u4fbf\u4e8e\u8c03\u8bd5\u3002<br \/> \u2022 \u4fdd\u6301 cron \u4f5c\u4e1a\u6700\u5c11\uff1a\u907f\u514d\u5b89\u6392\u592a\u591a\u9891\u7e41\u7684\u4efb\u52a1\u4ee5\u9632\u6b62\u7cfb\u7edf\u8fc7\u8f7d\u3002<br \/> \u2022 \u4f7f\u7528\u9501\u5b9a\u6587\u4ef6\uff1a\u901a\u8fc7\u4f7f\u7528\u9501\u5b9a\u6587\u4ef6\u9632\u6b62\u540c\u4e00\u4f5c\u4e1a\u7684\u591a\u4e2a\u5b9e\u4f8b\u540c\u65f6\u8fd0\u884c\u3002<br \/> cron \u4f5c\u4e1a\u7684\u66ff\u4ee3\u65b9\u6848<br \/> \u867d\u7136 cron \u5f88\u5f3a\u5927\uff0c\u4f46\u67d0\u4e9b\u7528\u4f8b\u53ef\u80fd\u4f1a\u53d7\u76ca\u4e8e\u66ff\u4ee3\u5de5\u5177\uff1a<\/p>\n<ol>\n<li> systemd \u8ba1\u65f6\u5668\uff1a\u73b0\u4ee3  \u7cfb\u7edf\u63d0\u4f9b\u7684 systemd \u8ba1\u65f6\u5668\u6bd4 cron \u66f4\u5177\u7075\u6d3b\u6027\u3002<\/li>\n<li> aws lambda \u548c\u8ba1\u5212\u4e8b\u4ef6\uff1a\u5bf9\u4e8e\u4e91\u5e94\u7528\u7a0b\u5e8f\uff0caws lambda \u53ef\u4ee5\u65e0\u670d\u52a1\u5668\u5730\u5b89\u6392\u4efb\u52a1\u3002<\/li>\n<li>  \u4e0a\u7684\u4efb\u52a1\u8ba1\u5212\u7a0b\u5e8f\uff1a\u4f7f\u7528 windows \u4efb\u52a1\u8ba1\u5212\u7a0b\u5e8f\u5728 windows \u7cfb\u7edf\u4e0a\u5b9e\u73b0\u7c7b\u4f3c\u7684\u81ea\u52a8\u5316\u3002<\/li>\n<li> kubernetes cronjobs\uff1a\u975e\u5e38\u9002\u5408\u5bb9\u5668\u5316\u73af\u5883\u81ea\u52a8\u5316\u5de5\u4f5c\u8d1f\u8f7d\u3002 \u5173\u4e8e cron jobs \u7684\u5e38\u89c1\u95ee\u9898<\/li>\n<li>\u4ec0\u4e48\u662f cron \u4f5c\u4e1a\uff1f cron \u4f5c\u4e1a\u662f\u7c7b unix \u7cfb\u7edf\u4e0a\u7684\u8ba1\u5212\u4efb\u52a1\uff0c\u6309\u7528\u6237\u5b9a\u4e49\u7684\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\u8fd0\u884c\u3002<\/li>\n<li>\u5982\u4f55\u7f16\u8f91 cron \u4f5c\u4e1a\uff1f \u4f7f\u7528 crontab -e \u547d\u4ee4\u6253\u5f00 cron \u7f16\u8f91\u5668\u5e76\u6dfb\u52a0\u3001\u4fee\u6539\u6216\u5220\u9664\u4f5c\u4e1a\u3002<\/li>\n<li>\u6211\u53ef\u4ee5\u5b89\u6392\u4e00\u4e2a cron \u4f5c\u4e1a\u6bcf\u79d2\u8fd0\u884c\u4e00\u6b21\u5417\uff1f \u4e0d\uff0ccron \u4f5c\u4e1a\u7684\u6700\u5c0f\u95f4\u9694\u662f\u4e00\u5206\u949f\u3002\u5bf9\u4e8e\u9891\u7387\u8f83\u9ad8\u7684\u4efb\u52a1\uff0c\u8bf7\u4f7f\u7528\u81ea\u5b9a\u4e49\u811a\u672c\u6216\u5176\u4ed6\u5de5\u5177\uff0c\u4f8b\u5982 watch\u3002<\/li>\n<li>\u5982\u4f55\u5bf9\u672a\u8fd0\u884c\u7684 cron \u4f5c\u4e1a\u8fdb\u884c\u6545\u969c\u6392\u9664\uff1f \u68c0\u67e5\u65e5\u5fd7\uff0c\u786e\u4fdd\u547d\u4ee4\u8def\u5f84\u6b63\u786e\uff0c\u5e76\u9a8c\u8bc1\u811a\u672c\u662f\u5426\u5177\u6709\u53ef\u6267\u884c\u6743\u9650\u3002<\/li>\n<li>cron \u548c crontab \u6709\u4ec0\u4e48\uff1f cron \u662f\u6267\u884c\u4f5c\u4e1a\u7684\u540e\u53f0\u670d\u52a1\uff0c\u800c crontab \u662f\u5b9a\u4e49\u4f5c\u4e1a\u7684\u6587\u4ef6\u3002<\/li>\n<li>\u6211\u53ef\u4ee5\u5728 windows \u4e0a\u4f7f\u7528 cron \u4f5c\u4e1a\u5417\uff1f windows \u672c\u8eab\u4e0d\u652f\u6301 cron\uff0c\u4f46\u60a8\u53ef\u4ee5\u4f7f\u7528\u4efb\u52a1\u8ba1\u5212\u7a0b\u5e8f\u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u3002 \u7ed3\u8bba cron \u4f5c\u4e1a\u662f\u5728\u57fa\u4e8e unix \u7684\u7cfb\u7edf\u4e2d\u81ea\u52a8\u6267\u884c\u91cd\u590d\u4efb\u52a1\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u8fc7\u638c\u63e1 cron 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\u6b64\u683c\u5f0f\u7531\u4e94\u4e2a\u5b57\u6bb5\u7ec4\u6210\uff0c\u540e\u8ddf\u547d\u4ee4\uff0c\u6bcf\u4e2a\u5b57\u6bb5\u5b9a\u4e49\u65f6\u95f4\u95f4\u9694\u3002 cron \u8868\u8fbe\u5f0f\u683c\u5f0f\u89e3\u91ca \u5b57\u6bb5 \u63cf\u8ff0 \u5141\u8bb8\u503c \u793a\u4f8b \u5206\u949f \u5c0f\u65f6\u4e2d\u7684\u5206\u949f 0\u201359 0 = \u5c0f\u65f6\u4e2d\u7684\u6700\u9ad8\u70b9 \u5c0f\u65f6 \u4e00\u5929\u4e2d\u7684\u5c0f\u65f6 0\u201323 14 = 2 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