ceph集群的OSD设备扩缩容实战指南
一.ceph集群的OSD设备扩容实战
1.添加osd的准备条件
为什么要添加OSD？
因为随着我们对ceph集群的使用，资源可能会被消耗殆尽，这个时候就得想法扩容集群资源，对于ceph存储资源的扩容，我们只需要添加相应的OSD节点即可。
添加OSD的准备条件:
我们需要单独添加一个新的节点并为其多添加2块500GB磁盘。
如果设备不存在，则参考如下操作。
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
[root@ceph144 ~]#
[root@ceph144 ~]# for i in `seq 0 2`; do echo "- - -" > /sys/class/scsi_host/host${i}/scan;done
[root@ceph144 ~]#
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
sdc 8:32 0 500G 0 disk
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
2.新增节点部署ceph软件包
1 备国内的软件源（含基础镜像软件源和epel源）
[root@ceph144 ~]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@ceph144 ~]# curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
2 所有节点配置ceph软件源
[root@ceph144 ~]# cat > /etc/yum.repos.d/ceph.repo << EOF
[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/\$basearch
gpgcheck=0
[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/noarch
gpgcheck=0
[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/SRPMS
gpgcheck=0
EOF
3 安装ceph环境的基础包
[root@ceph144 ~]# yum -y install ceph-osd
3.管理端添加osd设备前的状态查看
[root@ceph141 ~]# ceph -s
cluster:
id: 5821e29c-326d-434d-a5b6-c492527eeaad
health: HEALTH_OK
services:
mon: 3 daemons, quorum ceph141,ceph142,ceph143 (age 23h)
mgr: ceph141(active, since 22h), standbys: ceph143, ceph142
osd: 7 osds: 7 up (since 22h), 7 in (since 22h)
data:
pools: 3 pools, 96 pgs
objects: 74 objects, 114 MiB
usage: 7.8 GiB used, 1.9 TiB / 2.0 TiB avail
pgs: 96 active+clean
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 1.95319 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
[root@ceph141 ~]#
4.待添加节点的设备状态
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
sdc 8:32 0 500G 0 disk
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
5.ceph-deploy节点配置和待添加节点免密要登录
[root@harbor250 ~]# ssh-copy-id ceph144
6.ceph-deploy节点开始添加设备
[root@harbor250 ~]# cd /yinzhengjie/softwares/ceph-cluster
[root@harbor250 ceph-cluster]#
[root@harbor250 ceph-cluster]# ceph-deploy osd create ceph144 --data /dev/sdb # 添加ceph144节点的"/dev/sdb"磁盘设备
...
[ceph144][WARNIN] Running command: /bin/systemctl start ceph-osd@7
[ceph144][WARNIN] --> ceph-volume lvm activate successful for osd ID: 7
[ceph144][WARNIN] --> ceph-volume lvm create successful for: /dev/sdb
[ceph144][INFO ] checking OSD status...
[ceph144][DEBUG ] find the location of an executable
[ceph144][INFO ] Running command: /bin/ceph --cluster=ceph osd stat --format=json
[ceph_deploy.osd][DEBUG ] Host ceph144 is now ready for osd use.
[root@harbor250 ceph-cluster]#
[root@harbor250 ceph-cluster]# ceph-deploy osd create ceph144 --data /dev/sdc # 添加ceph144节点的"/dev/sdc"磁盘设备
...
[ceph144][WARNIN] Running command: /bin/systemctl start ceph-osd@8
[ceph144][WARNIN] --> ceph-volume lvm activate successful for osd ID: 8
[ceph144][WARNIN] --> ceph-volume lvm create successful for: /dev/sdc
[ceph144][INFO ] checking OSD status...
[ceph144][DEBUG ] find the location of an executable
[ceph144][INFO ] Running command: /bin/ceph --cluster=ceph osd stat --format=json
[ceph_deploy.osd][DEBUG ] Host ceph144 is now ready for osd use.
[root@harbor250 ceph-cluster]#
7.查看客户端添加后的设备状态
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
└─ceph--c7502f61--dc1f--4e2a--b2e2--149810ab3351-osd--block--ec3ba06b--cacf--4392--820e--155c3b0b675d
253:2 0 500G 0 lvm
sdc 8:32 0 500G 0 disk
└─ceph--89678d7b--d0a0--49ed--87ba--341b254508ba-osd--block--1b134e65--ef8b--4464--932e--14bb23ebfc4e
253:3 0 500G 0 lvm
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
8.管理端再次查看osd状态
[root@ceph141 ~]# ceph -s
cluster:
id: 5821e29c-326d-434d-a5b6-c492527eeaad
health: HEALTH_OK
services:
mon: 3 daemons, quorum ceph141,ceph142,ceph143 (age 23h)
mgr: ceph141(active, since 22h), standbys: ceph143, ceph142
osd: 9 osds: 9 up (since 91s), 9 in (since 91s)
data:
pools: 3 pools, 96 pgs
objects: 74 objects, 114 MiB
usage: 10 GiB used, 2.9 TiB / 2.9 TiB avail
pgs: 96 active+clean
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 up 1.00000 1.00000
8 hdd 0.48830 osd.8 up 1.00000 1.00000
[root@ceph141 ~]#
二.ceph集群OSD设备的缩容实战
1.服务端找出osd对应的一串编码
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 up 1.00000 1.00000
8 hdd 0.48830 osd.8 up 1.00000 1.00000
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd dump | egrep "osd.7|osd.8"
osd.7 up in weight 1 up_from 548 up_thru 563 down_at 0 last_clean_interval [0,0) [v2:10.0.0.144:6800/12665,v1:10.0.0.144:6801/12665] [v2:10.0.0.144:6802/12665,v1:10.0.0.144:6803/12665] exists,up ec3ba06b-cacf-4392-820e-155c3b0b675d
osd.8 up in weight 1 up_from 564 up_thru 573 down_at 0 last_clean_interval [0,0) [v2:10.0.0.144:6808/13111,v1:10.0.0.144:6809/13111] [v2:10.0.0.144:6810/13111,v1:10.0.0.144:6811/13111] exists,up 1b134e65-ef8b-4464-932e-14bb23ebfc4e
[root@ceph141 ~]#
2.客户端查看编码是否对应
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
└─ceph--c7502f61--dc1f--4e2a--b2e2--149810ab3351-osd--block--ec3ba06b--cacf--4392--820e--155c3b0b675d
253:2 0 500G 0 lvm
sdc 8:32 0 500G 0 disk
└─ceph--89678d7b--d0a0--49ed--87ba--341b254508ba-osd--block--1b134e65--ef8b--4464--932e--14bb23ebfc4e
253:3 0 500G 0 lvm
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
3.服务端剔除OSD
1 单独开一个终端执行
[root@ceph142 ~]# ceph -w # 可以查看ceph的数据迁移情况，可以单独开一个终端执行
cluster:
id: 5821e29c-326d-434d-a5b6-c492527eeaad
health: HEALTH_OK
services:
mon: 3 daemons, quorum ceph141,ceph142,ceph143 (age 23h)
mgr: ceph141(active, since 22h), standbys: ceph143, ceph142
osd: 9 osds: 9 up (since 5m), 9 in (since 5m)
data:
pools: 3 pools, 96 pgs
objects: 74 objects, 114 MiB
usage: 10 GiB used, 2.9 TiB / 2.9 TiB avail
pgs: 96 active+clean
... # 当我们执行"ceph osd out ..."相关代码时，就会出现如下的所示信息。
2024-02-01 16:57:27.280545 mon.ceph141 [INF] Client client.admin marked osd.7 out, while it was still marked up
2024-02-01 16:57:32.497417 mon.ceph141 [WRN] Health check failed: Degraded data redundancy: 11/222 objects degraded (4.955%), 2 pgs degraded (PG_DEGRADED)
2024-02-01 16:57:38.912016 mon.ceph141 [INF] Health check cleared: PG_DEGRADED (was: Degraded data redundancy: 11/222 objects degraded (4.955%), 2 pgs degraded)
2024-02-01 16:57:38.912062 mon.ceph141 [INF] Cluster is now healthy
2024-02-01 16:58:29.198849 mon.ceph141 [INF] Client client.admin marked osd.8 out, while it was still marked up
2024-02-01 16:58:33.044142 mon.ceph141 [WRN] Health check failed: Reduced data availability: 1 pg peering (PG_AVAILABILITY)
2024-02-01 16:58:33.044162 mon.ceph141 [WRN] Health check failed: Degraded data redundancy: 36/222 objects degraded (16.216%), 7 pgs degraded (PG_DEGRADED)
2024-02-01 16:58:38.462308 mon.ceph141 [WRN] Health check update: Reduced data availability: 6 pgs peering (PG_AVAILABILITY)
2024-02-01 16:58:39.469179 mon.ceph141 [WRN] Health check update: Degraded data redundancy: 1 pg degraded (PG_DEGRADED)
2024-02-01 16:58:39.469198 mon.ceph141 [INF] Health check cleared: PG_AVAILABILITY (was: Reduced data availability: 6 pgs peering)
2024-02-01 16:58:42.549459 mon.ceph141 [INF] Health check cleared: PG_DEGRADED (was: Degraded data redundancy: 1 pg degraded)
2024-02-01 16:58:42.549485 mon.ceph141 [INF] Cluster is now healthy
...
2 再次单独开一个终端执行
[root@ceph141 ~]# ceph osd out osd.7 # 当剔除OSD时，权重会变为0
marked out osd.7.
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd out osd.8
marked out osd.8.
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 up 0 1.00000
8 hdd 0.48830 osd.8 up 0 1.00000
[root@ceph141 ~]#
4.客户端的osd节点停止osd相关进程
[root@ceph144 ~]# ps -ef | grep ceph
root 12299 1 0 16:48 ? 00:00:00 /usr/bin/python2.7 /usr/bin/ceph-crash
ceph 12665 1 0 16:50 ? 00:00:05 /usr/bin/ceph-osd -f --cluster ceph --id 7 --setuser ceph --setgroup ceph
ceph 13111 1 0 16:51 ? 00:00:05 /usr/bin/ceph-osd -f --cluster ceph --id 8 --setuser ceph --setgroup ceph
root 13242 12245 0 17:00 pts/1 00:00:00 grep --color=auto ceph
[root@ceph144 ~]#
[root@ceph144 ~]#
[root@ceph144 ~]# systemctl disable --now ceph-osd@7
[root@ceph144 ~]#
[root@ceph144 ~]# systemctl disable --now ceph-osd@8
[root@ceph144 ~]#
[root@ceph144 ~]# ps -ef | grep ceph
root 12299 1 0 16:48 ? 00:00:00 /usr/bin/python2.7 /usr/bin/ceph-crash
root 13293 12245 0 17:00 pts/1 00:00:00 grep --color=auto ceph
[root@ceph144 ~]#
5.服务端再次查看OSD状态
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 down 0 1.00000
8 hdd 0.48830 osd.8 down 0 1.00000
[root@ceph141 ~]#
6.在管理节点删除osd
1 删除osd认证密钥
[root@ceph141 ~]# ceph auth del osd.7
updated
[root@ceph141 ~]#
[root@ceph141 ~]# ceph auth del osd.8
updated
[root@ceph141 ~]#
2 删除osd，注意观察osd的状态为DNE
[root@ceph141 ~]# ceph osd rm 7
removed osd.7
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd rm 8
removed osd.8
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 DNE 0
8 hdd 0.48830 osd.8 DNE 0
[root@ceph141 ~]#
7.客户端解除ceph对磁盘的占用
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
└─ceph--c7502f61--dc1f--4e2a--b2e2--149810ab3351-osd--block--ec3ba06b--cacf--4392--820e--155c3b0b675d
253:2 0 500G 0 lvm
sdc 8:32 0 500G 0 disk
└─ceph--89678d7b--d0a0--49ed--87ba--341b254508ba-osd--block--1b134e65--ef8b--4464--932e--14bb23ebfc4e
253:3 0 500G 0 lvm
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
[root@ceph144 ~]# dmsetup status
ceph--89678d7b--d0a0--49ed--87ba--341b254508ba-osd--block--1b134e65--ef8b--4464--932e--14bb23ebfc4e: 0 1048567808 linear
centos-swap: 0 4194304 linear
centos-root: 0 35643392 linear
ceph--c7502f61--dc1f--4e2a--b2e2--149810ab3351-osd--block--ec3ba06b--cacf--4392--820e--155c3b0b675d: 0 1048567808 linear
[root@ceph144 ~]#
[root@ceph144 ~]# dmsetup remove ceph--89678d7b--d0a0--49ed--87ba--341b254508ba-osd--block--1b134e65--ef8b--4464--932e--14bb23ebfc4e
[root@ceph144 ~]#
[root@ceph144 ~]# dmsetup remove ceph--c7502f61--dc1f--4e2a--b2e2--149810ab3351-osd--block--ec3ba06b--cacf--4392--820e--155c3b0b675d
[root@ceph144 ~]#
[root@ceph144 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk
sdc 8:32 0 500G 0 disk
sr0 11:0 1 4.5G 0 rom
[root@ceph144 ~]#
8.管理端清除osd的DNE状态，从crush中移除
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 2.92978 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0.97659 host ceph144
7 hdd 0.48830 osd.7 DNE 0
8 hdd 0.48830 osd.8 DNE 0
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd crush remove osd.7
removed item id 7 name 'osd.7' from crush map
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd crush remove osd.8
removed item id 8 name 'osd.8' from crush map
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 1.95319 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0 host ceph144
[root@ceph141 ~]#
9.管理端移除主机
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 1.95319 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
-9 0 host ceph144
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd crush remove ceph144
removed item id -9 name 'ceph144' from crush map
[root@ceph141 ~]#
[root@ceph141 ~]# ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 1.95319 root default
-3 0.48830 host ceph141
0 hdd 0.19530 osd.0 up 1.00000 1.00000
1 hdd 0.29300 osd.1 up 1.00000 1.00000
-5 0.97659 host ceph142
2 hdd 0.19530 osd.2 up 1.00000 1.00000
3 hdd 0.29300 osd.3 up 1.00000 1.00000
4 hdd 0.48830 osd.4 up 1.00000 1.00000
-7 0.48830 host ceph143
5 hdd 0.19530 osd.5 up 1.00000 1.00000
6 hdd 0.29300 osd.6 up 1.00000 1.00000
[root@ceph141 ~]#
10.验证集群状态，发现集群数据缩容成功
[root@ceph141 ~]# ceph -s
cluster:
id: 5821e29c-326d-434d-a5b6-c492527eeaad
health: HEALTH_OK
services:
mon: 3 daemons, quorum ceph141,ceph142,ceph143 (age 23h)
mgr: ceph141(active, since 22h), standbys: ceph143, ceph142
osd: 7 osds: 7 up (since 6m), 7 in (since 8m)
data:
pools: 3 pools, 96 pgs
objects: 74 objects, 114 MiB
usage: 7.8 GiB used, 1.9 TiB / 2.0 TiB avail
pgs: 96 active+clean
[root@ceph141 ~]#
当你的才华还撑不起你的野心的时候，你就应该静下心来学习。当你的能力还驾驭不了你的目标的时候，你就应该沉下心来历练。问问自己，想要怎样的人生。
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