ceph官网的ceph块设备(二）——快照相关

一）快照基础命令

网址：http://ceph.sptty.com/rbd/rbd-snapshot/

1. 创建快照

# rbd snap create yhcpool/yhctest@yhctestsnap

2.查询rbd镜像

# rbd snap ls yhcpool/yhctest

SNAPID NAME SIZE

4 yhctestsnap 512 MB

3.快照回滚

命令：

rbd snap rollback {pool-name}/{image-name}@{snap-name}

验证：

# rbd snap create yhcpool/yhctest@yhctestsnap2

# rbd snap ls yhcpool/yhctest

SNAPID NAME SIZE

4 yhctestsnap 512 MB

5 yhctestsnap2 512 MB

# rbd snap rollback yhcpool/yhctest@yhctestsnap

Rolling back to snapshot: 99% complete...2017-01-04 16:30:24.041936 7fdd93fff700 -1 librbd::object_map::LockRequest: failed to lock object map: (17) File exists

Rolling back to snapshot: 100% complete...done.

4.删除快照

命令：

rbd snap rm {pool-name}/{image-name}@{snap-name}

验证：

# rbd snap ls yhcpool/yhctest

SNAPID NAME SIZE

4 yhctestsnap 512 MB

5 yhctestsnap2 512 MB

# rbd snap rm yhcpool/yhctest@yhctestsnap

# rbd snap ls yhcpool/yhctest

SNAPID NAME SIZE

5 yhctestsnap2 512 MB

5.清除快照

删除某个rbd镜像的所有快照。

命令：

rbd snap purge {pool-name}/{image-name}

验证：

# rbd snap ls yhcpool/yhctest

SNAPID NAME SIZE

5 yhctestsnap2 512 MB

7 yhctestsnap3 512 MB

# rbd snap purge yhcpool/yhctest

Removing all snapshots: 100% complete...done.

# rbd snap ls yhcpool/yhctest

 

二）分层

1.保护快照

命令：

rbd snap protect {pool-name}/{image-name}@{snapshot-name}

验证：

# rbd snap protect yhcpool/yhctest@yhctestsnap1

注意：快照被保护后，不能被删除

# rbd snap rm yhcpool/yhctest@yhctestsnap1

rbd: snapshot 'yhctestsnap1' is protected from removal.

2017-01-04 17:02:20.966119 7f7ef6402700 -1 librbd::Operations: snapshot is protected

 

2.克隆快照

命令：

rbd clone {pool-name}/{parent-image}@{snap-name} {pool-name}/{child-image-name}

验证：

#rbd clone yhcpool/yhctest@yhctestsnap1 yhcpool/yhctestclone

 

3.取消快照保护

命令：

rbd snap unprotect {pool-name}/{image-name}@{snapshot-name}

验证：

# rbd snap unprotect yhcpool/yhctest@yhctestsnap1

4.查看快照的子孙

命令：

rbd children {pool-name}/{image-name}@{snapshot-name}

验证：

# rbd children yhcpool/yhctest@yhctestsnap1

yhcpool/yhctestclone

 

5.拍平克隆镜像

命令：

rbd flatten {pool-name}/{image-name}

验证：

# rbd info yhcpool/yhctestclone

rbd image 'yhctestclone':

size 512 MB in 128 objects

order 22 (4096 kB objects)

block_name_prefix: rbd_data.3f0cd2eb141f2

format: 2

features: layering, exclusive-lock, object-map, fast-diff, deep-flatten

flags:

parent: yhcpool/yhctest@yhctestsnap1

overlap: 512 MB

# rbd flatten yhcpool/yhctestclone

Image flatten: 100% complete...done.

# rbd info yhcpool/yhctestclone

rbd image 'yhctestclone':

size 512 MB in 128 objects

order 22 (4096 kB objects)

block_name_prefix: rbd_data.3f0cd2eb141f2

format: 2

features: layering, exclusive-lock, object-map, fast-diff, deep-flatten

flags: