postgresql 10数据库备份 pg_probackup 简明教程

测试环境说明

OS：CentOS Linux release 7.3.1611 (Core) X64

PG：pg10 beta3 source install

pg_probackup: 2.0.3 source install

建立归档备份目录

[postgres@masterdb ~]# mkdir /backupdir

[postgres@masterdb ~]# chown postgres.postgres -R /backupdir

数据库参数配置

### - Archiving - ###

archive_mode = on              

archive_command = 'pg_probackup archive-push -B /backupdir --instance pg10 --wal-file-path %p --wal-file-name %f'

### default ###

max_wal_senders = 10

hot_standby = on

full_page_writes = on

初始化备份目录

[postgres@masterdb ~]# su - postgres

[postgres@masterdb ~]$ pg_probackup init -B /backupdir

INFO: Backup catalog '/backupdir' successfully inited

添加备份实例目录

[postgres@masterdb ~]$ pg_probackup add-instance -B /backupdir -D /pgdata10/ --instance pg10

INFO: Instance 'pg10' successfully inited

显示备份实例配置

[postgres@masterdb ~]$ pg_probackup show-config -B /backupdir --instance pg10

#Backup instance info

PGDATA = /pgdata10/

system-identifier = 6460633300993501667

#Connection parameters:

PGDATABASE = postgres

#Replica parameters:

#Logging parameters:

#Retention parameters:

#Compression parameters:

compress-algorithm = none

compress-level = 6

[postgres@masterdb ~]$ pg_probackup backup -B /backupdir -b full --instance pg10

INFO: wait for pg_stop_backup()

INFO: Backup OVKYC7 completed

[postgres@masterdb ~]$ 

增量备份

[postgres@masterdb ~]$ pg_probackup backup -B /backupdir -b PAGE --instance pg10

INFO: wait for LSN 0/4000028 in archived WAL segment /backupdir/wal/pg10/000000010000000000000004

INFO: Backup OVKYME completed

显示备份

[postgres@masterdb ~]$ pg_probackup show -B /backupdir

BACKUP INSTANCE 'pg10'

===============================================================================================================================

 Instance    ID      Recovery time        Mode    WAL      Current/Parent TLI    Time    Data    Start LSN    Stop LSN   Status  

 pg10        OVKYME  2017-09-01 10:51:56  PAGE    ARCHIVE    1 / 0                 8s  4407kB   0/4000028    0/50000F0   OK      

 pg10        OVKYC7  2017-09-01 10:45:57  FULL    ARCHIVE    1 / 0                17s    31MB   0/2000060    0/2000198   OK      

验证备份

[postgres@masterdb ~]$ pg_probackup validate -B /backupdir --instance pg10

INFO: Validate backups of the instance 'pg10'

INFO: Validate backup OVKYME

INFO: backup validation completed successfully

INFO: Validate backup OVKYC7

INFO: All backups are valid

[postgres@masterdb ~]$

恢复备份

[postgres@masterdb pgdata10]$ pg_probackup restore -B /backupdir --instance pg10 -D /pgdata10/

配置保存期限

[postgres@masterdb ~]$ pg_probackup set-config -B /backupdir --instance pg10 --retention-redundancy 2 --retention-window 7

retention-redundancy = 2

retention-window = 7

并行备份

full

[postgres@masterdb ~]$ pg_probackup backup -B /backupdir --instance pg10 -b FULL -j 4

INFO: Backup OVL360 completed

incremental

[postgres@masterdb ~]$ pg_probackup backup -B /backupdir --instance pg10 -b page  -j 6

INFO: wait for LSN 0/B000028 in archived WAL segment /backupdir/wal/pg10/00000002000000000000000B

INFO: Backup OVL3BK completed

[postgres@masterdb ~]$ pg_probackup show -B /backupdir --instance pg10 

 pg10        OVL3BK  2017-09-01 12:33:24  PAGE    ARCHIVE    2 / 1                 6s  4417kB   0/B000028    0/C0000F0   OK      

 pg10        OVL360  2017-09-01 12:30:11  FULL    ARCHIVE    2 / 1                13s    31MB   0/9000060    0/9000198   OK      

restore

[postgres@masterdb ~]$ pg_probackup restore -B /backupdir --instance pg10 -D /pgdata10/ -j 6

INFO: Restore of backup OVL3BK completed.

[postgres@masterdb ~]$ pg_probackup show -B /backupdir --instance pg10 -D /pgdata10

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本文转自 pgmia 51CTO博客，原文链接:http://blog.51cto.com/heyiyi/1961899