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| 导读 | 今天检查 ceph 集群，发现有 pg 丢失, 本文就给大家介绍一下解决方法。 |
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 的想想信息。
[root@k8snode001 ~]# ceph pg dump_json pools |grep 2.2b
dumped all
2.2b 2487 1 1 0 1 9533198403 3048 3048 active+recovery_unfound+degraded 2020-07-23 08:56:07.669903 10373'5448370 10373:7312614 [14,22,4] 14 [14,22,4] 14 10371'5437258 2020-07-23 08:56:06.637012 10371'5437258 2020-07-23 08:56:06.637012 0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 rbd4. 尝试恢复 pg 2.2b 丢失地块
[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 delete6. 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
正文完
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