今天检查ceph集群，发现有pg丢失，于是就有了本文~~~
1.查看集群状态 [root@k8snode001 ~]# ceph health detail HEALTH_ERR 1/973013 objects unfound (0.000%); 17 scrub errors; Possible data damage: 1 pg recovery_unfound, 8 pgs inconsistent, 1 pg repair; Degraded data redundancy: 1/2919039 objects degraded (0.000%), 1 pg degraded OBJECT_UNFOUND 1/973013 objects unfound (0.000%) pg 2.2b has 1 unfound objects OSD_SCRUB_ERRORS 17 scrub errors PG_DAMAGED Possible data damage: 1 pg recovery_unfound, 8 pgs inconsistent, 1 pg repair pg 2.2b is active+recovery_unfound+degraded, acting [14,22,4], 1 unfound pg 2.44 is active+clean+inconsistent, acting [14,8,21] pg 2.73 is active+clean+inconsistent, acting [25,14,8] pg 2.80 is active+clean+scrubbing+deep+inconsistent+repair, acting [4,8,14] pg 2.83 is active+clean+inconsistent, acting [14,13,6] pg 2.ae is active+clean+inconsistent, acting [14,3,2] pg 2.c4 is active+clean+inconsistent, acting [8,21,14] pg 2.da is active+clean+inconsistent, acting [23,14,15] pg 2.fa is active+clean+inconsistent, acting [14,23,25] PG_DEGRADED Degraded data redundancy: 1/2919039 objects degraded (0.000%), 1 pg degraded pg 2.2b is active+recovery_unfound+degraded, acting [14,22,4], 1 unfound从输出发现pg 2.2b is active+recovery_unfound+degraded, acting [14,22,4], 1 unfound
现在我们来查看pg 2.2b，看看这个pg得想想信息。
可以看到它现在只有一个副本
2.查看pg map [root@k8snode001 ~]# ceph pg map 2.2b osdmap e10373 pg 2.2b (2.2b) -> up [14,22,4] acting [14,22,4]从pg map可以看出，pg 2.2b分布到osd [14,22,4]上
3.查看存储池状态 [root@k8snode001 ~]# ceph osd pool stats k8s-1 pool k8s-1 id 2 1/1955664 objects degraded (0.000%) 1/651888 objects unfound (0.000%) client io 271 KiB/s wr, 0 op/s rd, 52 op/s wr [root@k8snode001 ~]# ceph osd pool ls detail|grep k8s-1 pool 2 'k8s-1' replicated size 3 min_size 1 crush_rule 0 object_hash rjenkins pg_num 256 pgp_num 256 last_change 88 flags hashpspool,selfmanaged_snaps stripe_width 0 application rbd 4.尝试恢复pg 2.2b丢失的块 [root@k8snode001 ~]# ceph pg repair 2.2b如果一直修复不成功，可以查看卡住PG的具体信息，主要关注recovery_state，命令如下
[root@k8snode001 ~]# ceph pg 2.2b query { "...... "recovery_state": [ { "name": "Started/Primary/Active", "enter_time": "2020-07-21 14:17:05.855923", "might_have_unfound": [], "recovery_progress": { "backfill_targets": [], "waiting_on_backfill": [], "last_backfill_started": "MIN", "backfill_info": { "begin": "MIN", "end": "MIN", "objects": [] }, "peer_backfill_info": [], "backfills_in_flight": [], "recovering": [], "pg_backend": { "pull_from_peer": [], "pushing": [] } }, "scrub": { "scrubber.epoch_start": "10370", "scrubber.active": false, "scrubber.state": "INACTIVE", "scrubber.start": "MIN", "scrubber.end": "MIN", "scrubber.max_end": "MIN", "scrubber.subset_last_update": "0'0", "scrubber.deep": false, "scrubber.waiting_on_whom": [] } }, { "name": "Started", "enter_time": "2020-07-21 14:17:04.814061" } ], "agent_state": {} }如果repair修复不了；两种解决方案，回退旧版或者直接删除
5.解决方案 回退旧版 [root@k8snode001 ~]# ceph pg 2.2b mark_unfound_lost revert 直接删除 [root@k8snode001 ~]# ceph pg 2.2b mark_unfound_lost delete 6.验证我这里直接删除了，然后ceph集群重建pg,稍等会再看，pg状态变为active+clean
[root@k8snode001 ~]# ceph pg 2.2b query { "state": "active+clean", "snap_trimq": "[]", "snap_trimq_len": 0, "epoch": 11069, "up": [ 12, 22, 4 ],再次查看集群状态
[root@k8snode001 ~]# ceph health detail HEALTH_OK