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

+ v) n1 U- C! H; h! X# ~/ b6 C! W[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:

admin

1.查看image中内容
4 O. o4 @% b) `5 G4 m[root@ceph-client u01]# ll
- Z/ c- \+ X/ Z# i. Z& D2 ]total 20
) U2 C0 s( K, x4 k; r% @-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
! l) k/ Z! t0 c/ adrwx------ 2 root root 16384 Nov 17 16:38 lost+found
6 |# v7 p+ b2 z[root@ceph-client u01]# cat ceph.txt
Learning ceph snap!
3 n& }% i9 I3 @  `2.导出image

( Z. G! M2 P2 N% f5 F' n5 v[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

[root@ceph-client ~]# ll /root/data
# M1 X$ j/ [& B6 j-rw-r--r-- 1 root root 53687091200 Nov 17 19:06 /root/data
#导出文件大小
4 t0 f- R6 G: i; l) L[root@ceph-client ~]# du -sh /root/data
- C/ ~% G+ y0 W533M/root/data
$ m0 I; J: b, K2 P- W. r2.1将导出的文件再挂载到其他目录下
' T* `& I8 t8 h; C/ a  u. D
#查看导入文件类型

- V* M" u3 ]1 d& w  Q[root@ceph-client ~]# file data
9 \$ V+ I  P! d2 y4 Q& \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

[root@ceph-client ~]# losetup -f
/dev/loop0
[root@ceph-client ~]# losetup /dev/loop
: D; Y& s$ m8 Cloop0         loop-control
' K% ^% B1 ^1 c: r9 ]2.1.2挂载

: z, E6 L( I; Z. H$ U0 e[root@ceph-client ~]# losetup /dev/loop0 data
2.1.3创建目录并挂载目录

$ I4 k. e) I6 ^) y" r# K5 r$ E[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
2 J+ K" T7 |$ V! Z3 u2 X; f. A[root@ceph-client ~]# ll /test_tmp/
total 20
! y& B% m8 E) i! G7 b% n1 @8 E-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
drwx------ 2 root root 16384 Nov 17 16:38 lost+found
- Y+ f# d6 n0 V5 a0 L+ B[root@ceph-client ~]# cat /test_tmp/ceph.txt
Learning ceph snap!
& L2 }3 ^+ g  u# q+ S* g9 U) h4 h3.导入
8 H) e* y6 f0 y7 {" z% q$ R5 C0 k
0 J2 Y& R- G8 c5 z6 p5 P3.1删除data image数据

: u- |8 t- o" p3 I[root@ceph-client ~]# cd /u01
[root@ceph-client u01]# ll
2 l* e7 e9 Y4 y  ctotal 20
- h4 i' D9 X, `( N  |3 h" s" m-rw-r--r-- 1 root root    20 Nov 17 16:40 ceph.txt
drwx------ 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
lost+found
3 I# i1 L* [5 b& Z2 Q3.2导入iamge备份文件

[root@ceph-client ~]# rbd import /root/data data
rbd: image creation failed
Importing image: 0% complete...failed.
rbd: import failed: (17) File exists
+ k+ L  l: A- `/ X, l- x2 {% c2016-11-17 19:15:36.314780 7fa190639d80 -1 librbd: rbd image data already exists
  l( A$ z4 ]4 x+ O# p+ f" M+ p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
Importing 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。
) V# S3 j4 q% x
3.3查看新iamge data02信息
( B$ l% k; T" N0 v8 z5 _! s$ H
: E2 @- i+ h: x[root@ceph-client ~]# rbd info data02
6 w$ z( `3 a8 Xrbd image 'data02':
. c7 @# s- l% s3 osize 51200 MB in 12800 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.fbd22ae8944a
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
flags: