Ceph Luminous，我想念什么？

Question

对于之前的 Jewel 版本，我没有遇到任何问题。我创建了一个 5 个虚拟机的测试集群，全部使用 Centos 7 以及 Ceph 的 Nautilus 版本。 1 个 vm 是监视器，3 个是 OSD 和 1 个是管理员经理。集群部署OK，健康OK，但是创建MDS和pools后...

ceph -s
  cluster:
    id:     87c90336-38bc-4ec2-bcde-2629e1e7b12f
    health: HEALTH_WARN
            Reduced data availability: 42 pgs inactive, 43 pgs peering

  services:
    mon: 1 daemons, quorum ceph1-mon (age 8m)
    mgr: ceph1-admin(active, since 8m)
    mds: cephfs:1 {0=ceph1-osd=up:active} 1 up:standby
    osd: 3 osds: 3 up (since 7m), 3 in (since 20h)

  data:
    pools:   2 pools, 128 pgs
    objects: 18 objects, 2.6 KiB
    usage:   2.1 GiB used, 78 GiB / 80 GiB avail
    pgs:     32.812% pgs unknown
             67.188% pgs not active
             86 peering
             42 unknown

体检中..

ceph health detail 
HEALTH_WARN Reduced data availability: 42 pgs inactive, 43 pgs peering
PG_AVAILABILITY Reduced data availability: 42 pgs inactive, 43 pgs peering
    pg 9.0 is stuck peering for 254.671721, current state peering, last acting [0,1,2]
    pg 9.1 is stuck peering for 254.671732, current state peering, last acting [0,2,1]
    pg 9.4 is stuck peering for 254.670850, current state peering, last acting [0,1,2]
    pg 9.5 is stuck inactive for 234.575775, current state unknown, last acting []
    pg 9.7 is stuck inactive for 234.575775, current state unknown, last acting []
    pg 9.8 is stuck inactive for 234.575775, current state unknown, last acting []

输出真的很长。许多 PG 处于非活动状态或对等。我用过这个配置：

#ceph.conf
[global]
fsid = 87c90336-38bc-4ec2-bcde-2629e1e7b12f
mon_initial_members = ceph1-mon
mon_host = 10.2.0.117
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
mon_allow_pool_delete = true
mon_max_pg_per_osd = 128
osd max pg per osd hard ratio = 10 # < default is 2, try to set at least 5. It will be

我用这些命令创建了 OSD：

ceph-deploy --overwrite-conf osd create --data /dev/vdb ceph1-osd
ceph-deploy --overwrite-conf osd create --data /dev/vdb ceph2-osd
ceph-deploy --overwrite-conf osd create --data /dev/vdb ceph3-osd

我已经使用这些命令创建了 MDS：

ceph-deploy mds create ceph1-osd
ceph-deploy mds create ceph2-osd
ceph-deploy mds create ceph3-osd

对于池和文件系统，我使用了这些命令：

ceph osd pool create cephfs_data 64
ceph osd pool create cephfs_metadata 64
ceph fs new cephfs cephfs_metadata cephfs_data

怎么了？

Answer 1

在大多数情况下，此类 peering/unknown PG 与连接问题有关。监视器和 OSD 是否能够相互访问？可能是防火墙问题或一些错误的路由导致了问题？

此外，OSD 和监视器日志也值得一试。日志中是否有错误（肯定是）？

检查所有这些将指导您解决问题。

另见 Ceph troubleshooting guide。

Ceph Luminous，我想念什么？

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