openstack上cinder backup备份

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Cinder Backup备份
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cinder 备份提供了三种驱动服务： Ceph，TSM，Swift 其中默认备份驱动服务为swift

cinder 驱动服务的配置在cinder.conf文件中

backup_driver=cinder.backup.drivers.swift

Ceph的配置

backup_driver = cinder.backup.drivers.cephbackup_ceph_conf=/etc/ceph/ceph.confbackup_ceph_user = cinderbackup_ceph_chunk_size = 134217728backup_ceph_pool = backupsbackup_ceph_stripe_unit = 0backup_ceph_stripe_count = 0配置 Nova 来挂载 Ceph RBD 块设备

为了挂载 Cinder 块设备（块设备或者启动卷），必须告诉 Nova 挂载设备时使用的用户和 uuid 。libvirt会使用该用户来和 Ceph 集群进行连接和认证。

rbd_user = cinderrbd_secret_uuid = 457eb676-33da-42ec-9a8c-9293d545c337

' f. i* X. k/ ?/ a' U/ a完整版Ceph的配置：backup_driver = cinder.backup.drivers.cephbackup_ceph_conf=/etc/ceph/ceph.confbackup_ceph_user = cinderbackup_ceph_chunk_size = 134217728backup_ceph_pool = backupsbackup_ceph_stripe_unit = 0backup_ceph_stripe_count = 0
rbd_user = cinder
rbd_secret_uuid = 457eb676-33da-42ec-9a8c-9293d545c337
9 ]% t3 g7 _; dTSM的配置
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9 P/ a) Y% Z# R6 ?backup_driver = cinder.backup.drivers.tsmbackup_tsm_compression = True     (BoolOpt) 启用或禁用压缩备份backup_tsm_password = password     (StrOpt)  运行TSM用户的密码（节点密码）backup_tsm_volume_prefix = backup     (StrOpt) 当备份到TSM时备份标识id的卷前缀
Swift的配置
" _* s% c6 Q- F1 @+ |backup_driver = cinder.backup.drivers.swiftbackup_swift_url = http://localhost:8080/v1/AUTHbackup_swift_auth = per_userbackup_swift_user = <None>backup_swift_key = <None>backup_swift_container = volumebackupsbackup_swift_object_size = 52428800backup_swift_retry_attempts = 3backup_swift_retry_backoff = 2backup_compression_algorithm = zlib

代码分析

backup（/cinder/backup/）  /cinder/backup/__init__.py：指定并导入cinder-backup的API类；  /cinder/backup/api.py：处理所有与卷备份服务相关的请求；class API(base.Base):卷备份管理的接口API,主要定义了卷的备份相关的三个操作的API：    create：实现卷的备份的建立；    delete：实现删除卷的备份；    restore：实现恢复备份；这三个操作都需要通过backup_rpcapi定义的RPC框架类的远程调用来实现；/cinder/backup/driver.py:所有备份驱动类的基类；class BackupDriver(base.Base):所有备份驱动类的基类；/cinder/backup/manager.py：卷备份的管理操作的实现；class BackupManager(manager.SchedulerDependentManager):块存储设备的备份管理；继承自类 SchedulerDependentManager；主要实现的是三个远程调用的方法：   create_backup：实现卷的备份的建立（对应api.py中的creat方法）；   restore_backup：实现恢复备份（对应api.py中的restore方法）；   delete_backup：实现删除卷的备份（对应api.py中的delete方法）；/cinder/backup/drivers/ceph.py：ceph备份服务实现；   class CephBackupDriver(BackupDriver):Ceph对象存储的Cinder卷备份类；这个类确认备份Cinder卷到Ceph对象存储系统；/cinder/backup/drivers/swift.py：用swift作为后端的备份服务的实现；   class SwiftBackupDriver(BackupDriver):用swift作为后端的备份服务的各种管理操作实现类；/cinder/backup/drivers/tsm.py：IBM Tivoli存储管理（TSM）的备份驱动类；   class TSMBackupDriver(BackupDriver):实现了针对TSM驱动的卷备份的备份、恢复和删除等操作；
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具体操作

创建卷cinder create --display-name volume1 1备份卷cinder backup-create --container volumes_backup --display-name backuptoswift volume1恢复卷cinder backup-restore --volume-id cb0fe233-f9b6-4303-8a61-c31c863ef7ce volume1删除卷cinder backup-delete 1b9237a4-b384-4c8e-ad05-2e2dfd0c698c

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