这篇文章主要介绍ceph中如何解决HEALTH_WARN too few PGs per OSD问题,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
执行ceph –s 发现集群状态并非ok,具体信息如下:
$ sudo ceph -s cluster 257faba1-f259-4164-a0f9-1726bd70b05a health HEALTH_WARN too few PGs per OSD (16 < min 30) monmap e1: 1 mons at {bdc217=192.168.13.217:6789/0} election epoch 2, quorum 0 bdc217 osdmap e50: 8 osds: 8 up, 8 in flags sortbitwise pgmap v119: 64 pgs, 1 pools, 0 bytes data, 0 objects 715 MB used, 27550 GB / 29025 GB avail 64 active+clean
由于是新配置的集群,只有一个pool
$ sudo ceph osd lspools 0 rbd,
查看rbd pool的PGS
$ sudo ceph osd pool get rbd pg_num pg_num: 64
pgs为64,因为是2副本的配置,所以当有8个osd的时候,每个osd上均分了64/8 *2=16个pgs,也就是出现了如上的错误 小于最小配置30个
解决办法:修改默认pool rbd的pgs
$ sudo ceph osd pool set rbd pg_num 128 set pool 0 pg_num to 128 $ sudo ceph -s cluster 257faba1-f259-4164-a0f9-1726bd70b05a health HEALTH_WARN 64 pgs stuck inactive 64 pgs stuck unclean pool rbd pg_num 128 > pgp_num 64 monmap e1: 1 mons at {bdc217=192.168.13.217:6789/0} election epoch 2, quorum 0 bdc217 osdmap e52: 8 osds: 8 up, 8 in flags sortbitwise pgmap v121: 128 pgs, 1 pools, 0 bytes data, 0 objects 715 MB used, 27550 GB / 29025 GB avail 64 active+clean 64 creating
发现需要把pgp_num也一并修改,默认两个pg_num和pgp_num一样大小均为64,此处也将两个的值都设为128
$ sudo ceph osd pool set rbd pgp_num 128 set pool 0 pgp_num to 128
最后查看集群状态,显示为OK,错误解决:
$ sudo ceph -s cluster 257faba1-f259-4164-a0f9-1726bd70b05a health HEALTH_OK monmap e1: 1 mons at {bdc217=192.168.13.217:6789/0} election epoch 2, quorum 0 bdc217 osdmap e54: 8 osds: 8 up, 8 in flags sortbitwise pgmap v125: 128 pgs, 1 pools, 0 bytes data, 0 objects 718 MB used, 27550 GB / 29025 GB avail 128 active+clean
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