ceph数据 导出,导入

admin

1.查看image中内容

[root@ceph-client u01]# lltotal 20-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txtdrwx------ 2 root root 16384 Nov 17 16:38 lost+found[root@ceph-client u01]# cat ceph.txt Learning ceph snap!

2.导出image

[root@ceph-client ~]# rbd export data /root/dataExporting image: 100% complete...done.

--iamge名称，和导出路径及文件名称

[root@ceph-client ~]# ll /root/data -rw-r--r-- 1 root root 53687091200 Nov 17 19:06 /root/data

#导出文件大小

[root@ceph-client ~]# du -sh /root/data533M/root/data

2.1将导出的文件再挂载到其他目录下

#查看导入文件类型

[root@ceph-client ~]# file datadata: Linux rev 1.0 ext4 filesystem data, UUID=4a65a4e0-419e-4826-bbce-ddbc28b8922b (needs journal recovery) (extents) (64bit) (large files) (huge files)

2.1.1查看空闲的loop设备

[root@ceph-client ~]# losetup -f/dev/loop0[root@ceph-client ~]# losetup /dev/looploop0         loop-control

2.1.2挂载

[root@ceph-client ~]# losetup /dev/loop0 data

2.1.3创建目录并挂载目录

[root@ceph-client ~]# mkdir /test_tmp[root@ceph-client ~]# mount /dev/loop0 /test_tmp/

2.1.4查看目录中文件，文件是对的

[root@ceph-client ~]# ll /test_tmp/total 20-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txtdrwx------ 2 root root 16384 Nov 17 16:38 lost+found[root@ceph-client ~]# cat /test_tmp/ceph.txt Learning ceph snap!

3.导入

3.1删除data image数据

: {% X9 g5 E9 n0 [0 f' S[root@ceph-client ~]# cd /u01[root@ceph-client u01]# lltotal 20-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txtdrwx------ 2 root root 16384 Nov 17 16:38 lost+found[root@ceph-client u01]# rm ceph.txt rm: remove regular file ‘ceph.txt’? yes[root@ceph-client u01]# lslost+found

3.2导入iamge备份文件

[root@ceph-client ~]# rbd import /root/data datarbd: image creation failedImporting image: 0% complete...failed.rbd: import failed: (17) File exists2016-11-17 19:15:36.314780 7fa190639d80 -1 librbd: rbd image data already exists

这里报错了，原因是：不能导入到相同的image中，然后导入到同一个pool中一个不存在的image中。

[root@ceph-client ~]# rbd import /root/data data02Importing image: 100% complete...done.

--data02是不存在的，在导入过程中ceph会自动创建image并导入数据，导入过程不是很快。

3.3查看新iamge data02信息

[root@ceph-client ~]# rbd info data02rbd image 'data02':size 51200 MB in 12800 objectsorder 22 (4096 kB objects)block_name_prefix: rbd_data.fbd22ae8944aformat: 2features: layering, exclusive-lock, object-map, fast-diff, deep-flattenflags:
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admin

1.查看image中内容
* W2 p1 x+ `0 V& n$ P[root@ceph-client u01]# ll
# I, J- D# z# w+ Ototal 20
. j$ u* T7 d* I8 o-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
: y' L3 C, e" {drwx------ 2 root root 16384 Nov 17 16:38 lost+found
' \: t+ K" s, D[root@ceph-client u01]# cat ceph.txt
1 k+ W  {5 H- Y- ^6 ?% \8 X/ iLearning ceph snap!
2.导出image
- B: V. L( \) Z" |
[root@ceph-client ~]# rbd export data /root/data
Exporting image: 100% complete...done.
--iamge名称，和导出路径及文件名称
( Q5 v: G8 _4 X. [2 I. `
[root@ceph-client ~]# ll /root/data
-rw-r--r-- 1 root root 53687091200 Nov 17 19:06 /root/data
#导出文件大小
$ P' Y) E, }0 g& F9 y# ?( x[root@ceph-client ~]# du -sh /root/data
$ G2 `4 s5 i- n) w+ I& u1 L6 j533M/root/data
$ _8 _7 f0 F* ]/ t1 ?& G7 P2.1将导出的文件再挂载到其他目录下

#查看导入文件类型

0 I, k5 h3 A% V" O- H$ `2 ][root@ceph-client ~]# file data
data: Linux rev 1.0 ext4 filesystem data, UUID=4a65a4e0-419e-4826-bbce-ddbc28b8922b (needs journal recovery) (extents) (64bit) (large files) (huge files)
2.1.1查看空闲的loop设备
& R' j: K3 m6 h9 N1 W
[root@ceph-client ~]# losetup -f
/dev/loop0
[root@ceph-client ~]# losetup /dev/loop
$ H5 W: Z6 M6 I( Z3 x4 A- xloop0         loop-control
2.1.2挂载
" K) z: C# M, T1 D7 k, N7 e
" \  ]3 E4 h/ q0 e& z% O[root@ceph-client ~]# losetup /dev/loop0 data
% E! j* f: m+ j2.1.3创建目录并挂载目录

9 [2 |& w# D: @: N[root@ceph-client ~]# mkdir /test_tmp
5 m+ H2 O9 u- Q[root@ceph-client ~]# mount /dev/loop0 /test_tmp/
2.1.4查看目录中文件，文件是对的
' u4 v& k3 K5 C" ]3 T[root@ceph-client ~]# ll /test_tmp/
; m% Z/ {7 T& e  W  H: E( j$ vtotal 20
& s9 T! D0 p, H" J9 ~( q-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
$ o3 x: m( l/ _% e* E* {drwx------ 2 root root 16384 Nov 17 16:38 lost+found
7 n' }, e$ r; E6 W4 q7 ?$ u[root@ceph-client ~]# cat /test_tmp/ceph.txt
Learning ceph snap!
3.导入
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, c) e$ ?8 b& Q' I. v  b7 x' l3.1删除data image数据
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[root@ceph-client ~]# cd /u01
[root@ceph-client u01]# ll
1 n5 S( ^) M6 a0 g3 B2 h; ftotal 20
  ?5 H8 B7 m" w& ?7 j-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
  \# b3 P. L" C& A, bdrwx------ 2 root root 16384 Nov 17 16:38 lost+found
[root@ceph-client u01]# rm ceph.txt
rm: remove regular file ‘ceph.txt’? yes
[root@ceph-client u01]# ls
$ D3 X/ i/ U( ]0 N. v$ Clost+found
3.2导入iamge备份文件
1 z* q  Z/ I' X% r
[root@ceph-client ~]# rbd import /root/data data
rbd: image creation failed
Importing image: 0% complete...failed.
! `' a% |* {5 a; M+ wrbd: import failed: (17) File exists
2016-11-17 19:15:36.314780 7fa190639d80 -1 librbd: rbd image data already exists
2 r  u* \) G- \# \# U9 A& K这里报错了，原因是：不能导入到相同的image中，然后导入到同一个pool中一个不存在的image中。
[root@ceph-client ~]# rbd import /root/data data02
0 B. k9 \/ e3 F, K4 I5 W& d- t/ J4 [Importing image: 100% complete...done.
$ V. x- ^4 }5 E1 Y: `% S--data02是不存在的，在导入过程中ceph会自动创建image并导入数据，导入过程不是很快。
: q1 J$ [$ s  _1 g# x
$ c+ p! f  o, o1 `+ o& D3 b3.3查看新iamge data02信息
8 d6 I3 R* K* C7 t+ d- P" {3 N- P& M# \
[root@ceph-client ~]# rbd info data02
, j4 S8 b5 v, O* J: ^rbd image 'data02':
1 n0 J0 I$ o8 v* i) o$ e3 zsize 51200 MB in 12800 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.fbd22ae8944a
9 L7 S% k- m+ H: Q6 _: Eformat: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
flags: