KingbaseES V8R3集群备份恢复案例之--- timingbackup备份

案例说明：

KingbaseES V8R3集群自带了timingbackup.sh的脚本，可以通过一个脚本执行逻辑和物理备份，逻辑备份采用sys_dump，物理备份适用sys_basebackup，本案例详细记录了脚本的使用。

适用版本：

KingbaseES V8R3

1、查看数据库归档配置

[kingbase@node101 bin]$ cat ../data/kingbase.conf |grep -i archive_
archive_command = 'test ! -f /home/kingbase/cluster/HAR3/archivedir/%f && cp %p /home/kingbase/cluster/HAR3/archivedir/%f'
archive_mode=on
archive_dest='/home/kingbase/cluster/HAR3/archivedir

2、配置备份配置文件

1）脚本文件存储路径

[kingbase@node101 r3_cluster_backup]$ pwd
/home/kingbase/cluster/HAR3/db/kb_scripts/kb_backup/r3_cluster_backup
[root@node101 r3_cluster_backup]# ls -lh
total 16K
-rwxr-xr-x 1 kingbase kingbase 1.1K Oct 25 11:31 backup.conf
-rwxr-xr-x 1 kingbase kingbase 9.9K Oct 25 14:08 timingbackup.sh

2）配置backup.conf文件

Tips：备份需要在主库上执行，并且脚本需要root用户执行。

[kingbase@node101 r3_cluster_backup]$ cat backup.conf |grep -v ^#|grep -v ^$
kb_path=/home/kingbase/cluster/HAR3/db/bin/
cron_user=kingbase
cron_day=1
cron_hour=2
db_host=127.0.0.1
db_port=54321
db_user=SYSTEM
pass_encryption=0
db_pass=123456
backup_path=/data/kingbase/r3_bk
archive_path=/home/kingbase/cluster/HAR3/archivedir
db_list='prod'   # 逻辑备份需要指定备份的数据库
keep_day=7
physical_keep_backup_file_num=3
logical_keep_backup_file_num=7
backup_mode=both  # both执行逻辑和物理备份，logical逻辑备份，physical物理备份。

3、执行备份脚本

Tips：备份根据backup.conf的配置，执行相应的备份，并且在备份结束时，自动清理冗余的历史备份和归档日志。

[root@node101 r3_cluster_backup]# sh timingbackup.sh backup
Tue Oct 25 11:49:31 CST 2022 backup begin...
Tue Oct 25 11:49:31 CST 2022 logical backup and tar logical_backup_20221025114931.tar.gz done.
Tue Oct 25 11:49:31 CST 2022 remove backup file by retention strategy done.
Tue Oct 25 11:49:35 CST 2022 physical backup and tar physical_backup_20221025114931.tar.gz done.
Tue Oct 25 11:49:35 CST 2022 remove backup file by retention strategy done.
Tue Oct 25 11:49:35 CST 2022 remove archives done.
Tue Oct 25 11:49:35 CST 2022 backup done.

查看备份结果：

4、归档日志的清理

Tips：在执行sys_basebackup后，在wal归档日志目录下，创建backup的wal日志文件，然后调用sys_archiveclean工具清理backup以前的wal日志。

1、查看归档日志信息

[kingbase@node101 sys_xlog]$ ls -lh
total 273M

-rw------- 1 kingbase kingbase  16M Oct 25 11:48 00000001000000000000000D
-rw------- 1 kingbase kingbase  16M Oct 25 11:48 00000001000000000000000E
-rw------- 1 kingbase kingbase  16M Oct 25 11:49 00000001000000000000000F
-rw------- 1 kingbase kingbase  16M Oct 25 11:49 000000010000000000000010
-rw------- 1 kingbase kingbase  306 Oct 25 11:49 000000010000000000000010.00000028.backup
-rw------- 1 kingbase kingbase  16M Oct 25 11:49 000000010000000000000011

2、查看备份日志backup.log

.......
Tue Oct 25 11:49:31 CST 2022 /home/kingbase/cluster/HAR3/db/bin//sys_dump -h 127.0.0.1 -p 54321 -U SYSTEM -W ****** -Fc -f /data/kingbase/r3_bk/logical/PROD_20221025114931.dmp PROD
Tue Oct 25 11:49:31 CST 2022 rm -fr --interactive=never *_20221025114931.dmp
Tue Oct 25 11:49:31 CST 2022 /home/kingbase/cluster/HAR3/db/bin//sys_basebackup -h127.0.0.1 -p 54321 -U SYSTEM -W ****** -F p -X stream -D  /data/kingbase/r3_bk/physical/20221025114931_data
sys_archivecleanup: keep WAL file "/home/kingbase/cluster/HAR3/archivedir/000000010000000000000010" and later
sys_archivecleanup: removing file "/home/kingbase/cluster/HAR3/archivedir/00000001000000000000000E"
sys_archivecleanup: removing file "/home/kingbase/cluster/HAR3/archivedir/00000001000000000000000F"

如下图所示，wal日志清理：

5、总结

1、此脚本对于逻辑备份，需要指定数据库备份，对于数据库发生变化的实例，要及时更新backup.conf配置。

2、物理备份采用sys_basebackup，不支持增量备份，对于数据量大的环境，要谨慎使用，增量备份需要使用sys_rman执行。