对MySQL进行逻辑卷备份与恢复
ZRM 我之前我介绍过，这里就不多少了。以下是关于用mysql-zrm 来测试 基于LVM 逻辑卷管理的数据库全库备份。
我这里用的是SUN 的VBOX 虚拟机来做的测试，基于Red Hat AS 5.3。
1. 先建立逻辑卷。
fdisk 我就不介绍了，这里演示下怎么用创建逻辑卷以及怎么用LVM来备份MySQL 数据库。
# pvcreate /dev/hdb5
Physical volume "/dev/hdb5" successfully created
# vgcreate VolGroup01 /dev/hdb5
Volume group "VolGroup01" successfully created
用来存放数据。
# lvcreate -L 800M -n mysqldata /dev/VolGroup01
Logical volume "test1" created
用来存放日志。
# lvcreate -L 200M -n mysqlbinlog /dev/VolGroup01
Logical volume "test2" created
以下则是显示创建的LVM的信息:
# pvdisplay /dev/hdb5
--- Physical volume ---
PV Name /dev/hdb5
VG Name VolGroup01
PV Size 1.99 GB / not usable 2.12 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 509
Free PE 259
Allocated PE 250
PV UUID 6aeXEj-MDLY-7k3B-332y-qpZX-CiIX-ME1CZy
# vgdisplay /dev/VolGroup01
--- Volume group ---
VG Name VolGroup01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No37
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.99 GB
PE Size 4.00 MB
Total PE 509
Alloc PE / Size 250 / 1000.00 MB
FreePE / Size 259 / 1.01 GB
VG UUID ux2a6e-DGQX-E05p-I0IP-75zq-TW22-M1jF2x
# lvdisplay /dev/VolGroup01
--- Logical volume ---
LV Name /dev/VolGroup01/mysqldata
VG Name VolGroup01
LV UUID KFMFgG-HhXt-1xSq-VbVh-fb20-75Am-Ag6EIP
LV Write Access read/write
LV Status available
# open 1
LV Size 800.00 MB
Current LE 200
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Name /dev/VolGroup01/mysqlbinlog
VG Name VolGroup01
LV UUID urvM12-yw24-9GT7-rWsm-kaL4-GKNd-z0deZP
LV Write Access read/write
LV Status available
# open 1
LV Size 200.00 MB
Current LE 50
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
随系统自动加载。
# Add the following new lines to /etc/fstab.
/dev/VolGroup01/mysqldata /var/lib/mysql/data ext3
defaults 0 0
/dev/VolGroup01/mysqlbinlog /var/lib/mysql/binlog ext3
defaults 0 0
2. 以下是配置文件：
backup-level=0
backup-mode=raw
lvm-snapshot=10M
snapshot-plugin="/usr/share/mysql-zrm/plugins/lvm-snapshot.pl"
backup-type=regular
destination=/var/lib/mysql-zrm
all-databases=1
user="backup"
password="123456"
port=3306
socket=/var/lib/mysql/mysql.sock
mysql-binpath="/usr/bin"
mysql-binlog-path="/var/lib/mysql/binlog"
verbose=1
mailto="david.yang@actionsky.com"
html-reports=backup-status-info, backup-app-performance-info
~
3. 现在可以备份了：
# mysql-zrm-backup --backup-set=ytt
...
Wed Apr 15 07:20:22 2009: ytt:backup:INFO: Locking tables and creating
snapshot
Wed Apr 15 07:20:22 2009: ytt:backup:INFO: "/usr/bin"/mysql -e "flush tables
with read lock; flush logs; show master status;system
(/usr/share/mysql-zrm/plugins/lvm-snapshot.pl --action create-snapshot --dev
/dev/VolGroup01/mysqldata --size 10M --sname zrm3pItp8EAx4 --directory
/var/lib/mysql-zrm/ytt/20090415072018/ZRM_MOUNTS/zrm3pItp8EAx4
>/tmp/zrm3pItp8EAx4.log 2>&1 );system
>(/usr/share/mysql-zrm/plugins/lvm-snapshot.pl --action create-snapshot --dev
>/dev/VolGroup01/mysqlbinlog --size 10M --sname zrmeQrLWt8M2E --directory
>/var/lib/mysql-zrm/ytt/20090415072018/ZRM_MOUNTS/zrmeQrLWt8M2E
>>/tmp/zrmeQrLWt8M2E.log 2>&1 ); unlock tables;"
Wed Apr 15 07:20:25 2009: ytt:backup:INFO: File Position Binlog_Do_DB
Binlog_Ignore_DB
mysql.000010 98
Wed Apr 15 07:20:25 2009: ytt:backup:INFO: Output of command: 'Locking tables
and creating snapshot' is {
Rounding up size to full physical extent 12.00 MB
Logical volume "zrm3pItp8EAx4" created
}
Wed Apr 15 07:20:25 2009: ytt:backup:INFO: Output of command: 'Locking tables
and creating snapshot' is {
Rounding up size to full physical extent 12.00 MB
Logical volume "zrmeQrLWt8M2E" created
Wed Apr 15 07:20:34 2009: ytt:backup:INFO:
innodb-data=/var/lib/mysql/data/ibdata1;
Wed Apr 15 07:20:34 2009: ytt:backup:INFO:
innodb-logs=/var/lib/mysql/binlog/ib_logfile*
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: raw-databases-snapshot=test mysql t_girl
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: PHASE END: Creating snapshot based backup
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: PHASE START: Calculating backupsize & checksums
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: next-binlog=mysql.000010
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: backup-size=54.83 MB
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: PHASE END: Calculating backup size& checksums
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: read-locks-time=00:00:03
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: flush-logs-time=00:00:00
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: backup-time=00:00:16
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: backup-status=Backup succeeded
Wed Apr 15 07:20:34 2009: ytt:backup:INFO: Backup succeeded
4. 以下是恢复过程：
# mysql-zrm-restore --backup-set=ytt--source-directory=/var/lib/mysql-zrm/ytt/20090415072018
Wed Apr 15 07:21:04 2009: ytt:restore:INFO: Shutting down MySQL
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: cp -p
"/var/lib/mysql-zrm/ytt/20090415072018//var/lib/mysql/binlog/ib_logfile0" "/var/lib/mysql/binlog"
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: Restored innodb log '/var/lib/mysql/binlog/ib_logfile0'
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: cp -p "/var/lib/mysql-zrm/ytt/20090415072018//var/lib/mysql/binlog/ib_logfile1"
"/var/lib/mysql/binlog"
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: Restored innodb log '/var/lib/mysql/binlog/ib_logfile1'
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: cp -p "/var/lib/mysql-zrm/ytt/20090415072018//var/lib/mysql/data/ibdata1"
"/var/lib/mysql/data"
Wed Apr 15 07:21:06 2009: ytt:restore:INFO: Restored innodb data file '/var/lib/mysql/data/ibdata1'
Wed Apr 15 07:21:10 2009: ytt:restore:INFO: Restored database from raw backup:mysql
Wed Apr 15 07:21:10 2009: ytt:restore:INFO: cp -p "/var/lib/mysql-zrm/ytt/20090415072018/t_girl/db.opt" "/var/lib/mysql/data/t_girl"
Wed Apr 15 07:21:10 2009: ytt:restore:INFO: cp -p "/var/lib/mysql-zrm/ytt/20090415072018/t_girl/http_auth.frm" "/var/lib/mysql/data/t_girl"
Wed Apr 15 07:21:10 2009: ytt:restore:INFO: Restored database from raw backup:t_girl
Wed Apr 15 07:21:10 2009: ytt:restore:INFO: Restore done in 7 seconds.
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