Ceph Luminous版本创建OSD无法激活问题

一.问题描述

部署ceph的Luminous之ceph-12.2.10版本，在其中一个集群节点部署OSD时，发现命令执行完毕后，集群中并没有将格式化的盘加入到OSD中，也没有任何报错，问题如下：

[root@k8s-node2 ceph]# ceph-disk prepare --bluestore /dev/sdb
Creating new GPT entries.
Setting name!
partNum is 0
REALLY setting name!
The operation has completed successfully.
Setting name!
partNum is 1
REALLY setting name!
The operation has completed successfully.
The operation has completed successfully.
meta-data=/dev/sdb1              isize=2048   agcount=4, agsize=6400 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=25600, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=864, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.

执行完毕后，结果如下：

[root@k8s-node2 ceph]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   40G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   39G  0 part
  ├─centos-root 253:0    0   37G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   20G  0 disk
├─sdb1            8:17   0  100M  0 part
└─sdb2            8:18   0 19.9G  0 part
sdc               8:32   0   30G  0 disk
sr0              11:0    1  906M  0 rom

发现OSD并没有挂载成功

二.问题解决

对比集群的其它节点，查看配置文件没有问题，查看bootstrap-osd目录，发现此目录为空：

[root@k8s-node2 ceph]# ll -a /var/lib/ceph/bootstrap-osd/
total 4
drwxr-x---  2 root root  26 Dec 10 01:26 .
drwxr-x--- 12 ceph ceph 166 Dec 10 04:14 ..

将集群主节点的ceph.keyring文件复制到此目录下，执行OSD的集群命令：

[root@k8s-node2 ceph]# ceph-disk activate /dev/sdb1
Created symlink from /run/systemd/system/ceph-osd.target.wants/ceph-osd@4.service to /usr/lib/systemd/system/ceph-osd@.service.

OSD激活成功：

[root@k8s-node2 ceph]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   40G  0 disk
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   39G  0 part
  ├─centos-root 253:0    0   37G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   20G  0 disk
├─sdb1            8:17   0  100M  0 part /var/lib/ceph/osd/ceph-4
└─sdb2            8:18   0 19.9G  0 part
sdc               8:32   0   30G  0 disk
sr0              11:0    1  906M  0 rom