红帽全球峰会3.2.4. 识别故障排除 PG
如前文所述，放置组不一定只是一个问题，因为它的状态不是 active+clean。通常，Ceph 自我修复的功能在 PG 卡住时可能无法正常工作。卡住的状态包括：
- unclean ：放置组包含不会复制所需次数的对象。它们应该正在恢复。
-
Inactive ：放置组无法处理读取和写入，因为它们正在等待具有最新数据的 OSD 返回
up。 -
stale ： PG 处于未知状态，因为托管它们的 OSD 暂时尚未报告给 monitor 集群，并且可以使用
mon osd report timeout设置进行配置。
要识别卡住的 PG，请执行以下操作：
ceph pg dump_stuck {inactive|unclean|stale|undersized|degraded [inactive|unclean|stale|undersized|degraded...]} {<int>}
# ceph pg dump_stuck {inactive|unclean|stale|undersized|degraded [inactive|unclean|stale|undersized|degraded...]} {<int>}
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