From 182963af87b6550908b7fc040e72f2358ab39f34 Mon Sep 17 00:00:00 2001
From: howieyuen <haoyuan@mail.ustc.edu.cn>
Date: Thu, 24 Dec 2020 18:56:30 +0800
Subject: [PATCH] Add basic cron syntax in documentation sync from
 https://github.com/kubernetes/website/pull/25078

---
 .../workloads/controllers/cron-jobs.md        | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/content/zh/docs/concepts/workloads/controllers/cron-jobs.md b/content/zh/docs/concepts/workloads/controllers/cron-jobs.md
index 11e9752bac..153934afac 100644
--- a/content/zh/docs/concepts/workloads/controllers/cron-jobs.md
+++ b/content/zh/docs/concepts/workloads/controllers/cron-jobs.md
@@ -85,6 +85,54 @@ This example CronJob manifest prints the current time and a hello message every
 [使用 CronJob 运行自动化任务](/zh/docs/tasks/job/automated-tasks-with-cron-jobs/)
 一文会为你详细讲解此例。
 
+<!--
+### Cron schedule syntax
+-->
+### Cron 时间表语法
+
+```
+# ┌───────────── 分钟 (0 - 59)
+# │ ┌───────────── 小时 (0 - 23)
+# │ │ ┌───────────── 月的某天 (1 - 31)
+# │ │ │ ┌───────────── 月份 (1 - 12)
+# │ │ │ │ ┌───────────── 周的某天 (0 - 6) （周日到周一；在某些系统上，7 也是星期日）
+# │ │ │ │ │                                   
+# │ │ │ │ │
+# │ │ │ │ │
+# * * * * *
+```
+
+
+<!-- 
+| Entry 										| Description																									| Equivalent to |
+| ------------- 						| ------------- 																							|-------------  |
+| @yearly (or @annually)		| Run once a year at midnight of 1 January										| 0 0 1 1 * 		|
+| @monthly 									| Run once a month at midnight of the first day of the month	| 0 0 1 * * 		|
+| @weekly 									| Run once a week at midnight on Sunday morning								| 0 0 * * 0 		|
+| @daily (or @midnight)			| Run once a day at midnight																	| 0 0 * * * 		|
+| @hourly 									| Run once an hour at the beginning of the hour								| 0 * * * * 		|
+-->
+| 输入                      | 描述                            | 相当于         |
+| -------------             | -------------                  |-------------   |
+| @yearly (or @annually)		| 每年 1 月 1 日的午夜运行一次     | 0 0 1 1 *      |
+| @monthly 									| 每月第一天的午夜运行一次         | 0 0 1 * *      |
+| @weekly 									| 每周的周日午夜运行一次           | 0 0 * * 0      |
+| @daily (or @midnight)			| 每天午夜运行一次                 | 0 0 * * *      |
+| @hourly 									| 每小时的开始一次                 | 0 * * * *      |
+
+
+<!--  
+For example, the line below states that the task must be started every Friday at midnight, as well as on the 13th of each month at midnight:
+-->
+例如，下面这行指出必须在每个星期五的午夜以及每个月 13 号的午夜开始任务：
+
+`0 0 13 * 5`
+
+<!--  
+To generate CronJob schedule expressions, you can also use web tools like [crontab.guru](https://crontab.guru/).
+-->
+要生成 CronJob 时间表表达式，你还可以使用 [crontab.guru](https://crontab.guru/) 之类的 Web 工具。
+
 <!--
 ## CronJob Limitations