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[zh]: Add warning about using unsupported CRON_TZ 

Signed-off-by: cndoit18 <cndoit18@outlook.com>
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cndoit18 2021-11-18 11:23:00 +08:00
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47
content/zh/docs/concepts/workloads/controllers/cron-jobs.md
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@ -19,8 +19,6 @@ A _CronJob_ creates {{< glossary_tooltip term_id="job" text="Jobs" >}} on a repe
One CronJob object is like one line of a _crontab_ (cron table) file. It runs a job periodically
on a given schedule, written in [Cron](https://en.wikipedia.org/wiki/Cron) format.
In addition, the CronJob schedule supports timezone handling, you can specify the timezone by adding "CRON_TZ=<time zone>" at the beginning of the CronJob schedule, and it is recommended to always set `CRON_TZ`.
-->
_CronJob_ 创建基于时隔重复调度的 {{< glossary_tooltip term_id="job" text="Jobs" >}}。
@ -28,8 +26,6 @@ _CronJob_ 创建基于时隔重复调度的 {{< glossary_tooltip term_id="job" t
它用 [Cron](https://en.wikipedia.org/wiki/Cron) 格式进行编写，
并周期性地在给定的调度时间执行 Job。
另外，CronJob 调度支持时区处理，你可以通过在 CronJob schedule 字段的开头添加 "CRON_TZ=<time zone>" 指定时区，且建议始终设置 `CRON_TZ`。
<!--
All **CronJob** `schedule:` times are based on the timezone of the
@ -47,6 +43,24 @@ that the cron job controller uses.
那么为该容器所设置的时区将会决定 Cron Job 的控制器所使用的时区。
{{< /caution >}}
<!--
The [v1 CronJob API](/docs/reference/kubernetes-api/workload-resources/cron-job-v1/)
does not officially support setting timezone as explained above.
Setting variables such as `CRON_TZ` or `TZ` is not officially supported by the Kubernetes project.
`CRON_TZ` or `TZ` is an implementation detail of the internal library being used
for parsing and calculating the next Job creation time. Any usage of it is not
recommended in a production cluster.
-->
{{< caution >}}
如 [v1 CronJob API](/zh/docs/reference/kubernetes-api/workload-resources/cron-job-v1/) 所述，官方并不支持设置时区。
Kubernetes 项目官方并不支持设置如 `CRON_TZ` 或者 `TZ` 等变量。
`CRON_TZ` 或者 `TZ` 是用于解析和计算下一个 Job 创建时间所使用的内部库中一个实现细节。
不建议在生产集群中使用它。
{{< /caution>}}
<!--
When creating the manifest for a CronJob resource, make sure the name you provide
is a valid [DNS subdomain name](/docs/concepts/overview/working-with-objects/names#dns-subdomain-names).
@ -96,16 +110,15 @@ This example CronJob manifest prints the current time and a hello message every
### Cron 时间表语法
```
# ┌────────────────── 时区 (可选)
# | ┌───────────── 分钟 (0 - 59)
# | │ ┌───────────── 小时 (0 - 23)
# | │ │ ┌───────────── 月的某天 (1 - 31)
# | │ │ │ ┌───────────── month (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）
# | │ │ │ │ │
# | │ │ │ │ │
# | │ │ │ │ │
# CRON_TZ=UTC * * * * *
# ┌───────────── 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）
# │ │ │ │ │
# │ │ │ │ │
# │ │ │ │ │
# * * * * *
```
```
@ -138,11 +151,11 @@ This example CronJob manifest prints the current time and a hello message every
| @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(in UTC):
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（UTC 时间）：
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：
`CRON_TZ=UTC 0 0 13 * 5`
`0 0 13 * 5`
<!--
To generate CronJob schedule expressions, you can also use web tools like [crontab.guru](https://crontab.guru/).