openstack 上已经使用的镜像因需要改变相关配置，无法删除，使用rbd export 导出镜像，并修改镜像内容，rbd import恢复镜像...

admin

[root@controller1 ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0              11:0    1 1024M  0 rom  
vda             252:0    0   80G  0 disk
├─vda1          252:1    0    1G  0 part /boot
; `) N+ t$ D& K+ q8 E└─vda2          252:2    0   79G  0 part
4 G8 t4 u4 M- n# _' j" I6 X  ├─centos-swap 253:0    0   16G  0 lvm  [SWAP]
  └─centos-root 253:1    0   63G  0 lvm  /
+ a9 l$ }/ T: m* l9 s. Qloop0             7:0    0  1.8G  0 loop
loop1             7:1    0  1.8G  0 loop
[root@controller1 ~]# lvs
  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root centos -wi-ao----  63.00g                                                   
  swap centos -wi-ao---- <16.00g                                                   
) B6 L! j' ^5 f* ~9 b[root@controller1 ~]# vgchange -an
2 `0 C7 f( ^8 V2 b
: O: Q3 j: i2 q
3 M) b8 @9 y! D  C, t  Logical volume centos/swap in use.
  Can't deactivate volume group "centos" with 2 open logical volume(s)
7 Q+ g3 V$ P. g9 g7 ~$ o[root@controller1 ~]#
[root@controller1 ~]#
[root@controller1 ~]# kpartx -dv /dev/loop0
[root@controller1 ~]# kpartx -dv /dev/loop1
# z$ m0 ?! g' _* M* P2 ~[root@controller1 ~]# losetup -a
3 P9 ?! \0 T  C" V! g, U/dev/loop0: [64769]:67234908 (/usr/src/39a2e9a9-2ce5-454a-bd66-47f15eeb11ea-out (deleted))
/dev/loop1: [64769]:67234908 (/usr/src/39a2e9a9-2ce5-454a-bd66-47f15eeb11ea-out (deleted))
+ ]# g& J1 q. k+ G$ @' W( L1 {[root@controller1 ~]# losetup -d /dev/loop1
[root@controller1 ~]# losetup -d /dev/loop0
) A! M: t- A1 A" b[root@controller1 ~]# losetup -a
[root@controller1 ~]#
[root@controller1 ~]#
% m2 e( L3 r. O2 f3 X[root@controller1 ~]#
  t7 T  s, ~1 g) r, \* @2 \* {[root@controller1 ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
& P$ E% p( v1 Nsr0              11:0    1 1024M  0 rom  
vda             252:0    0   80G  0 disk
# ]. _3 ~) H  d" d) n# e6 f├─vda1          252:1    0    1G  0 part /boot
' P. S% Q. W9 |* G$ s' h; ^└─vda2          252:2    0   79G  0 part
1 y% e5 }$ F4 E: E  ├─centos-swap 253:0    0   16G  0 lvm  [SWAP]
  └─centos-root 253:1    0   63G  0 lvm  /

admin

再次使用rbd导入数据：

[root@controller1 src]# rbd import centos7.9.raw hdd-8T-volumes/volume-7339c495-25dd-44a3-b0cb-3b00cd59e070
Importing image: 100% complete...done.
执行扩容：
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-7339c495-25dd-44a3-b0cb-3b00cd59e070
Resizing image: 100% complete...done.
[root@controller1 src]# rbd info hdd-8T-volumes/volume-7339c495-25dd-44a3-b0cb-3b00cd59e070
rbd image 'volume-7339c495-25dd-44a3-b0cb-3b00cd59e070':
         size 50 GiB in 12800 objects
         order 22 (4 MiB objects)
/ H  a  \7 r! ]" [2 ~3 ]         snapshot_count: 0
& g4 ~! f8 z' j/ J         id: 9eb6a0f364b72b
         block_name_prefix: rbd_data.9eb6a0f364b72b
         format: 2
% `- _' j. ]+ ?. q, A         features: layering
* X; g4 l% w. c* i- w; u" N+ h; ?" N         op_features:
         flags:
         create_timestamp: Fri Jun 17 17:06:55 2022
$ W4 w8 R2 {9 E  t8 _7 P         access_timestamp: Fri Jun 17 17:06:55 2022
! b4 |, a: L3 A& j         modify_timestamp: Fri Jun 17 17:06:55 2022

admin

[root@controller1 src]# rbd import RHEL-Server-7.9.raw hdd-8T-volumes/volume-33620503-4d89-4bbe-86
Importing image: 100% complete...done.
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-33620503-4d89-4bbe-864b-c1a53b
Resizing image: 100% complete...done.
[root@controller1 src]# rbd -p hdd-8T-volumes ls |grep 56bcafeb-5519-4060-bfe1-fddd0f0f924d
volume-56bcafeb-5519-4060-bfe1-fddd0f0f924d
2 G9 y) m, ?+ s  i[root@controller1 src]# rbd rename hdd-8T-volumes/volume-56bcafeb-5519-4060-bfe1-fddd0f0f924d hdd-8T-volumes/volume-56bcafeb-5519-4060-bfe1-fddd0f0f924d-bak
[root@controller1 src]# rbd import RHEL-Server-7.9.raw hdd-8T-volumes/volume-56bcafeb-5519-4060-bfe1-fddd0f0f924d
5 i5 {! i7 N+ n  W1 i. ?* IImporting image: 100% complete...done.
0 R. w1 U- L2 T! k, T9 M[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/56bcafeb-5519-4060-bfe1-fddd0f0f924d
4 G& z: S$ O- S# v9 Q* z9 Y3 `rbd: error opening image 56bcafeb-5519-4060-bfe1-fddd0f0f924d: (2) No such file or directory
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-56bcafeb-5519-4060-bfe1-fddd0f0f924d
' S& B; E) b/ P& VResizing image: 100% complete...done.
[root@controller1 src]# rbd -p hdd-8T-volumes ls |grep 417435d6-c3a3-4c16-a760-eca8971d0582
volume-417435d6-c3a3-4c16-a760-eca8971d0582
[root@controller1 src]# rbd rename hdd-8T-volumes/volume-417435d6-c3a3-4c16-a760-eca8971d0582 hdd-8T-volumes/volume-417435d6-c3a3-4c16-a760-eca8971d0582-bak
[root@controller1 src]# rbd import RHEL-Server-7.9.raw hdd-8T-volumes/volume-417435d6-c3a3-4c16-a760-eca8971d0582
Importing image: 100% complete...done.
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-417435d6-c3a3-4c16-a760-eca8971d0582
! I/ U, R0 {4 f6 pResizing image: 100% complete...done.
* u2 M4 L9 g7 p* @% c& l) Z7 I[root@controller1 src]# rbd -p hdd-8T-volumes ls |grep 02874dba-f58e-45f3-8188-789ba2aa9883
7 g2 r1 j- K4 P% ?: X$ Ivolume-02874dba-f58e-45f3-8188-789ba2aa9883
0 l- L# B( G# v5 I2 ~# P[root@controller1 src]# rbd rename hdd-8T-volumes/volume-02874dba-f58e-45f3-8188-789ba2aa9883 hdd-8T-volumes/volume-02874dba-f58e-45f3-8188-789ba2aa9883-bak
; u# j; B  o  X; o) |[root@controller1 src]# rbd import RHEL-Server-7.9.raw hdd-8T-volumes/volume-02874dba-f58e-45f3-8188-789ba2aa9883
. O+ k  ^7 ]% K  AImporting image: 100% complete...done.
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-02874dba-f58e-45f3-8188-789ba2aa9883
/ c5 k( }7 m- [+ IResizing image: 100% complete...done.
/ |% o, C4 c7 X2 F1 [[root@controller1 src]# rbd -p hdd-8T-volumes ls |grep 7bd514c6-39c2-40c9-87ad-6eb86c9994b2
0 v% g9 }2 g  Bvolume-7bd514c6-39c2-40c9-87ad-6eb86c9994b2
[root@controller1 src]# rbd rename hdd-8T-volumes/volume-7bd514c6-39c2-40c9-87ad-6eb86c9994b2 hdd-8T-volumes/volume-7bd514c6-39c2-40c9-87ad-6eb86c9994b2-bak
[root@controller1 src]# rbd import RHEL-Server-7.9.raw hdd-8T-volumes/volume-7bd514c6-39c2-40c9-87ad-6eb86c9994b2
  e* I# ^" q- V8 tImporting image: 100% complete...done.
[root@controller1 src]# rbd resize --size 50G hdd-8T-volumes/volume-7bd514c6-39c2-40c9-87ad-6eb86c9994b2
Resizing image: 100% complete...done.