Ceph Reef(18.2.X)的快照分層實戰案例

尹正杰發表於2024-08-29

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正傑

版權宣告：原創作品，謝絕轉載！否則將追究法律責任。

一.準備測試環境
- 1.建立儲存池
- 2.對儲存池啟用rbd功能
- 3.對儲存池進行環境初始化
- 4.建立塊裝置
- 5.建立塊裝置詳細資訊
- 6.對映塊裝置
- 7.格式化檔案系統
- 8.掛載磁碟並複製資料
- 9.解除安裝塊裝置並取消對映
二.服務端定製基礎快照並保護模式
- 1.建立基礎快照
- 2.將快照置於保護模式
- 3.被"保護"的快照是無法刪除的
三.基於快照進行克隆操作
- 1.基於基礎快照模板克隆新映象
- 2.檢視克隆的資訊
- 3.檢視基礎快照目標是否有子映象
四.客戶端掛載新映象進行讀寫測試
- 1.ceph141節點新增對映塊裝置測試，無需格式化
- 2.ceph142節點新增對映塊裝置測試，無需格式化
- 3.ceph143節點新增對映塊裝置測試，無需格式化
五.客戶端取消映象掛載
- 1.ceph141節點操作
- 2.ceph142節點操作
- 3.ceph143節點操作
六.刪除基礎映象的快照
- 1.子快照需要展平資料
- 2.取消保護基礎映象的快照保護
- 3.刪除基礎映象的快照
七客戶端再次對映測試
- 1.ceph141節點
- 2.ceph142節點
- 3.ceph143節點

一.準備測試環境

1.建立儲存池

[root@ceph141 ~]# ceph osd pool create yinzhengjie 2 2
pool 'yinzhengjie' created
[root@ceph141 ~]#

2.對儲存池啟用rbd功能

[root@ceph141 ~]# ceph osd pool application get yinzhengjie
{}
[root@ceph141 ~]# 
[root@ceph141 ~]# ceph osd pool application enable yinzhengjie rbd
enabled application 'rbd' on pool 'yinzhengjie'
[root@ceph141 ~]# 
[root@ceph141 ~]# ceph osd pool application get yinzhengjie
{
    "rbd": {}
}
[root@ceph141 ~]#

3.對儲存池進行環境初始化

[root@ceph141 ~]# rbd pool init yinzhengjie
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd pool stats yinzhengjie
Total Images: 0
Total Snapshots: 0
Provisioned Size: 0 B
[root@ceph141 ~]#

4.建立塊裝置

[root@ceph141 ~]# rbd create wordpress -s 4G  -p yinzhengjie

5.建立塊裝置詳細資訊

[root@ceph141 ~]# rbd ls -p yinzhengjie
wordpress
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd info yinzhengjie/wordpress
rbd image 'wordpress':
        size 4 GiB in 1024 objects
        order 22 (4 MiB objects)
        snapshot_count: 0
        id: ad4945cbcd9
        block_name_prefix: rbd_data.ad4945cbcd9
        format: 2
        features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
        op_features: 
        flags: 
        create_timestamp: Wed Aug 28 00:55:28 2024
        access_timestamp: Wed Aug 28 00:55:28 2024
        modify_timestamp: Wed Aug 28 00:55:28 2024
[root@ceph141 ~]#

6.對映塊裝置

[root@ceph141 ~]# rbd map yinzhengjie/wordpress
/dev/rbd0
[root@ceph141 ~]#

7.格式化檔案系統

[root@ceph141 ~]# mkfs.xfs /dev/rbd0 
meta-data=/dev/rbd0              isize=512    agcount=8, agsize=131072 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=1048576, imaxpct=25
         =                       sunit=16     swidth=16 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=16 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
Discarding blocks...Done.
[root@ceph141 ~]#

8.掛載磁碟並複製資料

[root@ceph141 ~]# mount /dev/rbd0 /mnt/
[root@ceph141 ~]# 
[root@ceph141 ~]# cp /etc/os-release /mnt/
[root@ceph141 ~]# 
[root@ceph141 ~]# cp /etc/hosts /mnt/
[root@ceph141 ~]# 
[root@ceph141 ~]# ll /mnt/
total 12
drwxr-xr-x  2 root root   37 Aug 28 20:31 ./
drwxr-xr-x 21 root root 4096 Aug 21 20:54 ../
-rw-r--r--  1 root root  283 Aug 28 20:31 hosts
-rw-r--r--  1 root root  386 Aug 28 20:31 os-release
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped
id  pool         namespace  image      snap  device   
0   yinzhengjie             wordpress  -     /dev/rbd0
[root@ceph141 ~]#

9.解除安裝塊裝置並取消對映

[root@ceph141 ~]# umount /mnt 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd unmap /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped
[root@ceph141 ~]#

二.服務端定製基礎快照並保護模式

1.建立基礎快照

[root@ceph141 ~]# rbd snap ls yinzhengjie/wordpress
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd snap create yinzhengjie/wordpress@clonewp01
Creating snap: 100% complete...done.
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd snap ls yinzhengjie/wordpress
SNAPID  NAME       SIZE   PROTECTED  TIMESTAMP               
     4  clonewp01  4 GiB             Wed Aug 28 20:40:06 2024
[root@ceph141 ~]#

2.將快照置於保護模式

[root@ceph141 ~]# rbd snap protect yinzhengjie/wordpress@clonewp01
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd snap ls yinzhengjie/wordpress  # 很明顯，當前映象的clonewp01快照已經被咱們保護起來了
SNAPID  NAME       SIZE   PROTECTED  TIMESTAMP               
     4  clonewp01  4 GiB  yes        Wed Aug 28 20:40:06 2024
[root@ceph141 ~]#

3.被"保護"的快照是無法刪除的

[root@ceph141 ~]# rbd snap rm yinzhengjie/wordpress@clonewp01
Removing snap: 0% complete...failed.
2024-08-28T22:13:23.313+0800 7fcb7f7fe640 -1 librbd::Operations: snapshot is protected
rbd: snapshot 'clonewp01' is protected from removal.
[root@ceph141 ~]#

三.基於快照進行克隆操作

1.基於基礎快照模板克隆新映象

[root@ceph141 ~]# ceph osd pool ls
.mgr
yinzhengjie-rbd
yinzhengjie
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd ls -p yinzhengjie
wordpress
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd ls -p yinzhengjie-rbd
k8s
[root@ceph141 ~]#  
[root@ceph141 ~]# rbd clone  yinzhengjie/wordpress@clonewp01 yinzhengjie/wp01
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd clone  yinzhengjie/wordpress@clonewp01 yinzhengjie-rbd/wp02  # 克隆時塊裝置可以不在同一個儲存池，但是使用時可能會存在問題。
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd clone  yinzhengjie/wordpress@clonewp01 yinzhengjie/wp03
[root@ceph141 ~]#

2.檢視克隆的資訊

[root@ceph141 ~]# rbd ls -p yinzhengjie-rbd -l
NAME  SIZE   PARENT                           FMT  PROT  LOCK
k8s   5 GiB                                     2            
wp02  4 GiB  yinzhengjie/wordpress@clonewp01    2            
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd ls -p yinzhengjie -l
NAME                 SIZE   PARENT                           FMT  PROT  LOCK
wordpress            4 GiB                                     2            
wordpress@clonewp01  4 GiB                                     2  yes       
wp01                 4 GiB  yinzhengjie/wordpress@clonewp01    2    
wp03                 4 GiB  yinzhengjie/wordpress@clonewp01    2                    
[root@ceph141 ~]#

3.檢視基礎快照目標是否有子映象

[root@ceph141 ~]# rbd children yinzhengjie/wordpress@clonewp01 
yinzhengjie/wp01
yinzhengjie/wp03
yinzhengjie-rbd/wp02
[root@ceph141 ~]#

四.客戶端掛載新映象進行讀寫測試

溫馨提示:
    經過我測試發現如果將多個塊裝置在同一個節點無法掛載的情況，報錯: "wrong fs type, bad option, bad superblock on /dev/rbd1, missing codepage or helper program, or other error."
    要解決這個問題，可以將3個塊裝置分別掛載到不同的節點測試即可。本案例就時將3個塊裝置分別掛載到不同的節點測試。我測試的版本是Reef 18.2.4。

1.ceph141節點新增對映塊裝置測試，無需格式化

[root@ceph141 ~]# rbd showmapped 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd map yinzhengjie/wp01
/dev/rbd0
[root@ceph141 ~]#  
[root@ceph141 ~]# mkdir -pv /yinzhengjie/data/wp01
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp01   -     /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# mount /dev/rbd0 /yinzhengjie/data/wp01/
[root@ceph141 ~]# 
[root@ceph141 ~]# ll /yinzhengjie/data/wp01/
total 12
drwxr-xr-x 2 root root   37 Aug 28 20:31 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:44 ../
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph141 ~]# 
[root@ceph141 ~]# cp /etc/fstab /etc/hostname /yinzhengjie/data/wp01/
[root@ceph141 ~]# 
[root@ceph141 ~]# ll /yinzhengjie/data/wp01/
total 20
drwxr-xr-x 2 root root   66 Aug 28 21:45 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:44 ../
-rw-r--r-- 1 root root  657 Aug 28 21:45 fstab
-rw-r--r-- 1 root root    8 Aug 28 21:45 hostname
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph141 ~]#

2.ceph142節點新增對映塊裝置測試，無需格式化

[root@ceph142 ~]# rbd showmapped 
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd map yinzhengjie-rbd/wp02
/dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd showmapped 
id  pool             namespace  image  snap  device   
0   yinzhengjie-rbd             wp02   -     /dev/rbd0
[root@ceph142 ~]#  
[root@ceph142 ~]# mkdir -pv /yinzhengjie/data/wp02
[root@ceph142 ~]# 
[root@ceph142 ~]# mount /dev/rbd0 /yinzhengjie/data/wp02/
[root@ceph142 ~]#  
[root@ceph142 ~]# ll /yinzhengjie/data/wp02/
total 12
drwxr-xr-x 2 root root   37 Aug 28 21:48 ./
drwxr-xr-x 3 root root 4096 Aug 28 21:48 ../
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph142 ~]# 
[root@ceph142 ~]# rm -f /yinzhengjie/data/wp02/os-release 
[root@ceph142 ~]# 
[root@ceph142 ~]# ll /yinzhengjie/data/wp02/
total 8
drwxr-xr-x 2 root root   19 Aug 28 21:48 ./
drwxr-xr-x 3 root root 4096 Aug 28 21:48 ../
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
[root@ceph142 ~]#

3.ceph143節點新增對映塊裝置測試，無需格式化

[root@ceph143 ~]# rbd showmapped 
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd map yinzhengjie/wp03
/dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp03   -     /dev/rbd0
[root@ceph143 ~]#  
[root@ceph143 ~]# mkdir -pv /yinzhengjie/data/wp03
[root@ceph143 ~]# 
[root@ceph143 ~]# mount /dev/rbd0 /yinzhengjie/data/wp03
[root@ceph143 ~]# 
[root@ceph143 ~]# ll /yinzhengjie/data/wp03
total 12
drwxr-xr-x 2 root root   37 Aug 28 20:31 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:50 ../
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph143 ~]# 
[root@ceph143 ~]# cp /etc/netplan/00-installer-config.yaml /yinzhengjie/data/wp03
[root@ceph143 ~]# 
[root@ceph143 ~]# ll /yinzhengjie/data/wp03
total 16
drwxr-xr-x 2 root root   69 Aug 28 21:51 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:50 ../
-rw------- 1 root root  367 Aug 28 21:51 00-installer-config.yaml
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph143 ~]#

五.客戶端取消映象掛載

1.ceph141節點操作

[root@ceph141 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp01   -     /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# umount /yinzhengjie/data/wp01 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd unmap /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped 
[root@ceph141 ~]#

2.ceph142節點操作

[root@ceph142 ~]# rbd showmapped 
id  pool             namespace  image  snap  device   
0   yinzhengjie-rbd             wp02   -     /dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# umount /yinzhengjie/data/wp02 
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd unmap /dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd showmapped 
[root@ceph142 ~]#

3.ceph143節點操作

[root@ceph143 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp03   -     /dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# umount /yinzhengjie/data/wp03 
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd unmap /dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd showmapped 
[root@ceph143 ~]#

六.刪除基礎映象的快照

1.子快照需要展平資料

溫馨提示:
      底層是將基礎映象的快照資料複製到子快照中，這個速度取決於映象的大小

[root@ceph141 ~]# rbd children yinzhengjie/wordpress@clonewp01 # 注意，此處我故意不對"yinzhengjie/wp03"的進行展平。
yinzhengjie/wp01
yinzhengjie/wp03
yinzhengjie-rbd/wp02
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd flatten yinzhengjie/wp01
Image flatten: 100% complete...done.
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd flatten yinzhengjie-rbd/wp02
Image flatten: 100% complete...done.
[root@ceph141 ~]# 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd children yinzhengjie/wordpress@clonewp01  # 很明顯，此處基礎快照僅有一個我沒有展平的子快照啦～
yinzhengjie/wp03
[root@ceph141 ~]#

2.取消保護基礎映象的快照保護

[root@ceph141 ~]# rbd snap unprotect yinzhengjie/wordpress@clonewp01. # 很明顯，如果不展平子快照，這裡就不允許取消保護 
2024-08-28T22:09:04.182+0800 7f880530a640 -1 librbd::SnapshotUnprotectRequest: cannot unprotect: at least 1 child(ren) [d4495e828556] in pool 'yinzhengjie'
2024-08-28T22:09:04.182+0800 7f8805b0b640 -1 librbd::SnapshotUnprotectRequest: encountered error: (16) Device or resource busy
2024-08-28T22:09:04.182+0800 7f8805b0b640 -1 librbd::SnapshotUnprotectRequest: 0x55e0d195abd0 should_complete_error: ret_val=-16
rbd: unprotecting snap failed: 2024-08-28T22:09:04.190+0800 7f880530a640 -1 librbd::SnapshotUnprotectRequest: 0x55e0d195abd0 should_complete_error: ret_val=-16
(16) Device or resource busy
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd flatten yinzhengjie/wp03
Image flatten: 100% complete...done.
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd children yinzhengjie/wordpress@clonewp01  # Duang，此處看不到有子快照啦。
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd snap unprotect yinzhengjie/wordpress@clonewp01  # Duang，可以取消保護啦！
[root@ceph141 ~]#

3.刪除基礎映象的快照

[root@ceph141 ~]# rbd snap ls yinzhengjie/wordpress
SNAPID  NAME       SIZE   PROTECTED  TIMESTAMP               
     4  clonewp01  4 GiB             Wed Aug 28 20:40:06 2024
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd snap rm yinzhengjie/wordpress@clonewp01
Removing snap: 100% complete...done.
[root@ceph141 ~]#  
[root@ceph141 ~]# rbd snap ls yinzhengjie/wordpress  # Duang，快照刪除成功啦！
[root@ceph141 ~]#

七客戶端再次對映測試

溫馨提示:
      經過測試發現，儘管刪除了基礎映象的快照，並不會影響子映象的使用喲～

1.ceph141節點

[root@ceph141 ~]# rbd showmapped 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd map yinzhengjie/wp01
/dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# mount /dev/rbd0  /yinzhengjie/data/wp01/
[root@ceph141 ~]# 
[root@ceph141 ~]# ll /yinzhengjie/data/wp01/
total 20
drwxr-xr-x 2 root root   66 Aug 28 21:45 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:44 ../
-rw-r--r-- 1 root root  657 Aug 28 21:45 fstab
-rw-r--r-- 1 root root    8 Aug 28 21:45 hostname
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph141 ~]#  
[root@ceph141 ~]# rm -f /yinzhengjie/data/wp01/h*
[root@ceph141 ~]# 
[root@ceph141 ~]# ll /yinzhengjie/data/wp01/
total 12
drwxr-xr-x 2 root root   37 Aug 28 22:22 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:44 ../
-rw-r--r-- 1 root root  657 Aug 28 21:45 fstab
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph141 ~]# 
[root@ceph141 ~]# umount /yinzhengjie/data/wp01 
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp01   -     /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd unmap /dev/rbd0
[root@ceph141 ~]# 
[root@ceph141 ~]# rbd showmapped 
[root@ceph141 ~]#

2.ceph142節點

[root@ceph142 ~]# rbd showmapped 
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd map yinzhengjie-rbd/wp02
/dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd showmapped 
id  pool             namespace  image  snap  device   
0   yinzhengjie-rbd             wp02   -     /dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# mount /dev/rbd0 /yinzhengjie/data/wp02/
[root@ceph142 ~]# 
[root@ceph142 ~]# ll /yinzhengjie/data/wp02/
total 8
drwxr-xr-x 2 root root   19 Aug 28 21:48 ./
drwxr-xr-x 3 root root 4096 Aug 28 21:48 ../
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
[root@ceph142 ~]# 
[root@ceph142 ~]# cp /etc/hostname /yinzhengjie/data/wp02/
[root@ceph142 ~]# 
[root@ceph142 ~]# ll /yinzhengjie/data/wp02/
total 12
drwxr-xr-x 2 root root   35 Aug 28 22:24 ./
drwxr-xr-x 3 root root 4096 Aug 28 21:48 ../
-rw-r--r-- 1 root root    8 Aug 28 22:24 hostname
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
[root@ceph142 ~]# 
[root@ceph142 ~]# umount /yinzhengjie/data/wp02 
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd unmap /dev/rbd0
[root@ceph142 ~]# 
[root@ceph142 ~]# rbd showmapped 
[root@ceph142 ~]#

3.ceph143節點

[root@ceph143 ~]# rbd showmapped 
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd map yinzhengjie/wp03
/dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd showmapped 
id  pool         namespace  image  snap  device   
0   yinzhengjie             wp03   -     /dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# mount /dev/rbd0 /yinzhengjie/data/wp03/
[root@ceph143 ~]# 
[root@ceph143 ~]# ll /yinzhengjie/data/wp03/
total 16
drwxr-xr-x 2 root root   69 Aug 28 21:51 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:50 ../
-rw------- 1 root root  367 Aug 28 21:51 00-installer-config.yaml
-rw-r--r-- 1 root root  283 Aug 28 20:31 hosts
-rw-r--r-- 1 root root  386 Aug 28 20:31 os-release
[root@ceph143 ~]# 
[root@ceph143 ~]# rm -f /yinzhengjie/data/wp03/*os*
[root@ceph143 ~]# 
[root@ceph143 ~]# ll /yinzhengjie/data/wp03/
total 8
drwxr-xr-x 2 root root   38 Aug 28 22:26 ./
drwxr-xr-x 6 root root 4096 Aug 28 21:50 ../
-rw------- 1 root root  367 Aug 28 21:51 00-installer-config.yaml
[root@ceph143 ~]# 
[root@ceph143 ~]# umount /yinzhengjie/data/wp03 
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd unmap /dev/rbd0
[root@ceph143 ~]# 
[root@ceph143 ~]# rbd showmapped 
[root@ceph143 ~]#

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Ceph Reef(18.2.X)的快照分層實戰案例

一.準備測試環境

1.建立儲存池

2.對儲存池啟用rbd功能

3.對儲存池進行環境初始化

4.建立塊裝置

5.建立塊裝置詳細資訊

6.對映塊裝置

7.格式化檔案系統

8.掛載磁碟並複製資料

9.解除安裝塊裝置並取消對映

二.服務端定製基礎快照並保護模式

1.建立基礎快照

2.將快照置於保護模式

3.被"保護"的快照是無法刪除的

三.基於快照進行克隆操作

1.基於基礎快照模板克隆新映象

2.檢視克隆的資訊

3.檢視基礎快照目標是否有子映象

四.客戶端掛載新映象進行讀寫測試

1.ceph141節點新增對映塊裝置測試，無需格式化

2.ceph142節點新增對映塊裝置測試，無需格式化

3.ceph143節點新增對映塊裝置測試，無需格式化

五.客戶端取消映象掛載

1.ceph141節點操作

2.ceph142節點操作

3.ceph143節點操作

六.刪除基礎映象的快照

1.子快照需要展平資料

2.取消保護基礎映象的快照保護

3.刪除基礎映象的快照

七 客戶端再次對映測試

1.ceph141節點

2.ceph142節點

3.ceph143節點

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