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由于磁盘 3 (数据磁盘)磁盘空间不足而导致 OnCommand Unified Manager 数据库损坏

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适用场景

适用于集群模式 ONTAP 的 OnCommand Unified Manager

问题描述

Unified Manager MySQL 服务无法启动。  由于 MySQL 不会启动所有其他服务,因此也无法启动。
 
在 MySQL error.log 中查看,您将看到记录的以下内容:
20XX-0X-18T04:11:30.978630Z 17096 [ERROR] Disk is full writing './unified-manager.~rec~' (Errcode: 16727840 - No space left on device). Waiting for someone to free space...

如果 MySQL 服务可能会在发生损坏后启动,您可能会在 MySQL error.log 文件中看到以下内容:
=====
20XX-0X -28T20:20:42.887959Z 17309 [ERROR] MYSQL_BIN_LOG::open failed to sync the index file.
20XX-0X -28T20:20:42.889354Z 17309 [ERROR] /usr/sbin/mysqld: Binary logging not possible. Message: Either disk is full or file system is read only while rotating the binlog. Aborting the server.
=====

如果 MySQL 服务能够启动, MySQL 将尝试自行恢复 / 修复,但由于已损坏,无法恢复。
=====
20XX-0X-28T20:20:44.383042Z 0 [Note] InnoDB: Starting crash recovery.
20XX-0X-28T20:20:44.399480Z 0 [Warning] InnoDB: Database page corruption or a failed file read of page [page id: space=23589, page number=2]. Trying to recover it from the doublewrite buffer.
20XX-0X-28T20:20:44.399563Z 0 [Note] InnoDB: Recovered page [page id: space=23589, page number=2] from the doublewrite buffer.
20XX-0X-28T20:20:44.399602Z 0 [Warning] InnoDB: Database page corruption or a failed file read of page [page id: space=23589, page number=3]. Trying to recover it from the doublewrite buffer.
20XX-0X-28T20:20:44.405526Z 0 [Warning] InnoDB: 16384 bytes should have been written. Only 8192 bytes written. Retrying for the remaining bytes.
20XX-0X-28T20:20:44.408596Z 0 [Warning] InnoDB: Retry attempts for writing partial data failed.
 =====


您也可以通过检查磁盘 3/ 数据磁盘上的可用空间量进行确认。

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注意:从 Unified Manager 7.2 及更高版本开始,一旦磁盘容量达到大约 85% , Unified Manager 将向已配置的电子邮件地址发送警报。  此警报旨在为管理员提供足够的时间来扩展磁盘,以及在发生损坏之前扩展磁盘 3 分区。
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注意:从 Unified Manager 7.3 及更高版本开始,只有 Unified Manager 的 OVA 版本会在磁盘空间达到 95% 的已用空间时停止采集服务。  此操作旨在减少写入数据库的信息量。请注意,停止采集服务不会停止对 MySQL 数据库的所有写入,因为 OCIE 服务器服务和 MySQL 服务仍在运行。 

 

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