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楼主 |
发表于 2018-9-28 12:03:27
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1.查看image中内容. E: j* M3 H0 q! l/ a& [6 `% Z& u3 ?& j
[root@ceph-client u01]# ll
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-rw-r--r-- 1 root root 20 Nov 17 16:40 ceph.txt1 Z/ S, X4 W e9 h) g
drwx------ 2 root root 16384 Nov 17 16:38 lost+found2 g! B8 d2 p: M2 |+ ]
[root@ceph-client u01]# cat ceph.txt
# z" \* L* H; w6 D0 S0 o' eLearning ceph snap!. f0 d) w+ ^* L- P0 d( k
2.导出image
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' c5 M; o1 i- L: u8 B0 m& c" C1 U[root@ceph-client ~]# rbd export data /root/data
5 I* r z8 U1 p7 `, _( C8 k h" jExporting image: 100% complete...done.3 S2 w& T$ z7 w% n& p1 ~' D1 W
--iamge名称，和导出路径及文件名称
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* g2 |% X) @# G# _6 @[root@ceph-client ~]# ll /root/data " M2 j: X. N6 N1 C+ |% m+ ]8 d
-rw-r--r-- 1 root root 53687091200 Nov 17 19:06 /root/data3 `! H* x0 h- b U
#导出文件大小* r: O% @- j- c/ f1 q( c
[root@ceph-client ~]# du -sh /root/data
" y# j$ ^2 d: f533M/root/data
3 n6 {) ~! u k5 H4 E6 f5 X2.1将导出的文件再挂载到其他目录下
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#查看导入文件类型
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[root@ceph-client ~]# file data+ o6 H$ `7 u4 e) B+ l, Y- e0 p
data: Linux rev 1.0 ext4 filesystem data, UUID=4a65a4e0-419e-4826-bbce-ddbc28b8922b (needs journal recovery) (extents) (64bit) (large files) (huge files)- e% V$ P" |8 ^5 C0 f6 \: ^
2.1.1查看空闲的loop设备7 `4 H- o) R7 x3 D
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[root@ceph-client ~]# losetup -f
! c8 E7 T% M7 o4 m6 n8 @0 A7 z! e$ W/dev/loop0
1 @, X: ^ [" Y" l5 Q[root@ceph-client ~]# losetup /dev/loop
- R- z' x& D* W. r: G. Y+ N: O9 H0 Dloop0 loop-control& w0 Y- D1 F2 x0 Z3 }( e( s" {
2.1.2挂载
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$ D4 M/ r; b/ v, x7 _% q! [+ _, }[root@ceph-client ~]# losetup /dev/loop0 data# w6 y& ?8 t2 ^( Z- P$ a) p
2.1.3创建目录并挂载目录) v+ \% T' a8 ~3 R8 e l- R
* l; X' I+ U4 r2 e$ K[root@ceph-client ~]# mkdir /test_tmp7 x: i0 l0 p" w$ O
[root@ceph-client ~]# mount /dev/loop0 /test_tmp/1 e- ~2 p+ z' G/ E4 U. v, g
2.1.4查看目录中文件，文件是对的; [8 e! ]3 W) _1 p+ ~
[root@ceph-client ~]# ll /test_tmp/
. |. }0 _; d- ^" `1 ptotal 20
3 p2 l2 p$ W6 c7 i0 y% D+ e-rw-r--r-- 1 root root 20 Nov 17 16:40 ceph.txt
& Q) s- O! }" s: t8 D9 i3 ddrwx------ 2 root root 16384 Nov 17 16:38 lost+found2 C; h- p3 ?' X4 a' `+ ^% P7 L. L
[root@ceph-client ~]# cat /test_tmp/ceph.txt 1 u4 g9 N6 T o0 C' g
Learning ceph snap!2 ?2 V! O" Q0 X
3.导入5 n0 \6 w0 |9 [; l! w7 ?
" o. v5 w- ^. I9 x# q+ @/ @3.1删除data image数据
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[root@ceph-client ~]# cd /u01
% X, M7 c( E; F7 M[root@ceph-client u01]# ll$ o+ G' f# M# |5 h( o
total 20
. g3 h8 r% `+ }-rw-r--r-- 1 root root 20 Nov 17 16:40 ceph.txt' g7 f4 z4 v" P! g8 ^% T
drwx------ 2 root root 16384 Nov 17 16:38 lost+found$ M3 S$ ^+ |: h, e+ V" I
[root@ceph-client u01]# rm ceph.txt
5 g, l' Z2 ^6 j- x/ M% Brm: remove regular file ‘ceph.txt’? yes. [) ^% ~: M: a) Q# @4 _
[root@ceph-client u01]# ls* B# n# V( H, s) s( T% N V. G
lost+found! k+ Z3 |/ A, T
3.2导入iamge备份文件
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4 w B5 s' z" L5 I4 n5 r[root@ceph-client ~]# rbd import /root/data data! N. p, N* C W( L$ W) |
rbd: image creation failed y5 Y' y/ M- ?) w, T2 a
Importing image: 0% complete...failed.
: k$ Y1 O/ n9 brbd: import failed: (17) File exists
! R# X7 c4 Q0 _+ B2016-11-17 19:15:36.314780 7fa190639d80 -1 librbd: rbd image data already exists
4 i: B$ C) q( k0 ~; r1 j8 }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。
- k7 n3 Z- d' {$ b/ ][root@ceph-client ~]# rbd import /root/data data02% N5 |3 ^' U; t# ]4 t
Importing image: 100% complete...done.
0 O2 D3 g9 B! [, K6 g. s8 ?--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。1 ^) e. i- D, H
- ^% P1 S q6 N& J9 S; Z ^& ?3.3查看新iamge data02信息1 Z5 u4 y- D2 W& k$ W
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[root@ceph-client ~]# rbd info data02* G |' L9 D+ p O c: s* a( U+ _% N! Z
rbd image 'data02':
" X* r* ^0 o+ H0 E5 M4 j5 ksize 51200 MB in 12800 objects
* K- U9 Z x! T, `) eorder 22 (4096 kB objects)+ U/ i0 Z6 E0 { ~
block_name_prefix: rbd_data.fbd22ae8944a
$ `* O# s2 s$ \# F6 Hformat: 2
" V1 H, h# c! c5 {features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
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发表于 2018-9-28 12:02:43