doc,chart: add the both s3 nfs backup documents #735

Author: acekingke

charts/mysql-operator/crds/mysql.radondb.com_mysqlclusters.yaml

@@ -70,6 +70,15 @@ spec:
                 description: Represents the name of the secret that contains credentials
                   to connect to the storage provider to store backups.
                 type: string
+              bothS3NFS:
+                description: Specify that crontab job backup both on NFS and S3 storage.
+                properties:
+                  nfsSchedule:
+                    description: NFS schedule.
+                    type: string
+                  s3Schedule:
+                    type: string
+                type: object
               metricsOpts:
                 default:
                   enabled: false

docs/en-us/backup_cron.md

@@ -5,7 +5,7 @@ Contents
   - [Cron expression format](#cron-expression-format)
     - [Special characters](#special-characters)
     - [Predefined schedules](#predefined-schedules)
-
+ - [both cron backup for s3 and nfs](#both-s3-nfs)
 # Overview
 The scheduled backup is currently supported for both S3 and NFS backups. You can use the cron expression to specify the backup schedule. Set the `backupSchedule` parameter under the `spec` field in the YAML file of the cluster, for example:
 
@@ -64,4 +64,21 @@ You may use one of several pre-defined schedules in place of a cron expression.
 | @monthly               | Run once a month, midnight, first of month | 0 0 0 1 * *   |
 | @weekly                | Run once a week, midnight on Sunday        | 0 0 0 * * 0   |
 | @daily (or @midnight)  | Run once a day, midnight                   | 0 0 0 * * *   |
-| @hourly                | Run once an hour, beginning of hour        | 0 0 * * * *   |
+| @hourly                | Run once an hour, beginning of hour        | 0 0 * * * *   |
+
+# both cron backup for s3 and nfs
+if you have specified the `backupSecretName` , `nfsServerAddress` and `backupSchedule` , the operator will run nfs backup instead of s3 backup, but if you want backup them both, you should specify `bothS3NFS`
+field. it has two sub fields.
+* nfsSchedule: nfs' Cron expression, reference from [Predefined schedules](#Predefined-schedules)
+* s3Schedule:  s3's Cron expression,  reference from [Predefined schedules](#Predefined-schedules)
+for examples:
+```yaml
+... 
+spec:
+  replicas: 3
+  mysqlVersion: "5.7"
+  bothS3NFS: 
+    nfsSchedule: "0 0 0 * * *"
+    s3Schedule:  "0 0 2 * * *"
+  ...
+```

docs/zh-cn/backup_cron.md

@@ -5,7 +5,7 @@
   - [Cron 表达式格式](#cron-表达式格式)
     - [特殊字符](#特殊字符)
     - [预定义时间表](#预定义时间表)
-
+- [S3与NFS联合定时备份](#S3与NFS联合定时备份)
 # 简介
 目前，无论 S3 还是 NFS 备份，均支持定时备份，并支持使用 Cron 表达式来指定备份的时间策略。您只需直接在集群的 YAML 文件的 `spec` 下设置 `backupSchedule` 字段。例如：
 
@@ -67,3 +67,19 @@ spec:
 | @weekly                 | 每周执行一次，在周六和周日之间的夜晚 12 点执行 | 0 0 0 * * 0 |
 | @daily（或 @midnight）  | 每日执行一次，在夜晚 12 点执行                 | 0 0 0 * * * |
 | @hourly                 | 每小时执行一次，在第 1 分钟执行                | 0 0 * * * * |
+
+# S3与NFS联合定时备份
+同时配置了 `backupSecretName` 和 `nfsServerAddress` 以及 `backupSchedule` 情况下, 定时备份会优先使用 `nfs` 进行备份,而不会进行 S3 备份 如果您需要同时进行 `S3` 和 `nfs` 的定时备份, 需要新增 `bothS3NFS` 选项. 有如下两个子项:
+* nfsSchedule: nfs 备份Cron 表达式, 格式参见 [预定义时间表](#预定义时间表)
+* s3Schedule:  s3 备份Cron 表达式, 格式参见 [预定义时间表](#预定义时间表)
+示例:
+```yaml
+... 
+spec:
+  replicas: 3
+  mysqlVersion: "5.7"
+  bothS3NFS: 
+    nfsSchedule: "0 0 0 * * *"
+    s3Schedule:  "0 0 2 * * *"
+  ...
+```