Centos 7 backup and restore Redis data
Sep 02, 2024 pm 02:02 PM
Redis is an in-memory key-value cache and store (i.e. database) that can also be saved permanently to disk. In this article, you will learn how to back up and restore your redis database on Centos 7.
By default, Redis data will be saved to a .rdb file on disk, which is a point-in-time snapshot of the Redis data set. Snapshots are taken at specified intervals, so they're perfect for backups.
In Centos 7 and other Linux distributions, the Redis database directory is /var/lib/redis by default. However, if you have changed the redis storage location, you can find it by typing:
[root@renwolecom ~]# find / -name *rdb 使用redis-cli管理工具進入數(shù)據(jù)庫： [root@renwolecom ~]# redis-cli 由于大部分數(shù)據(jù)都運行在內(nèi)存中，redis只會每隔一段時間保存一次，為獲取最新副本，請執(zhí)行以下命令： 10.10.204.64:6379> save OK (1.02s) 另外，如果Redis設(shè)置了用戶認證，就需要先驗證，再保存，例如： 10.10.204.64:6379> auth RenwoleQxl5qpKHrh9khuTW 10.10.204.64:6379> save 之后進行備份即可，例如： [root@renwolecom ~]# cp /var/lib/redis/dump.rdb /apps/redis-backup-20180129
Restoring a backup requires you to replace the existing Redis database file with the recovery file. To ensure that the original data files are not damaged, we recommend restoring to a new Redis server if possible.
Stop the Redis database. Once stopped, the Redis database is offline.
[root@renwolecom ~]# systemctl stop redis 如果恢復到原始Redis服務器，請重命名當前數(shù)據(jù)文件，之后再進行恢復： [root@renwolecom ~]# mv /var/lib/redis/dump.rdb /var/lib/redis/dump.rdb.old [root@renwolecom ~]# cp -p /apps/redis-backup-20180129/dump.rdb /var/lib/redis/dump.rdb 設(shè)置dump.rdb文件權(quán)限，拷貝過來的數(shù)據(jù)文件，可能不具備Redis用戶及讀取權(quán)限，需要手動賦予： [root@renwolecom ~]# chown redis:redis /var/lib/redis/dump.rdb [root@renwolecom ~]# chmod 660 /var/lib/redis/dump.rdb 啟動redis [root@renwolecom ~]# systemctl start redis 大功告成！現(xiàn)在你可以登錄redis核實數(shù)據(jù)了。
Note:
According to requirements, close AOF, and AOF tracks each write operation to the Redis database. Since we are trying to restore from a point-in-time backup, we don't want Redis to recreate the operations stored in its AOF files.
Whether AOF is enabled can be known by viewing the file:
[root@renwolecom ~]# ls /var/lib/redis/
If you see a file with the .aof suffix, it means you have AOF enabled.
Rename the .aof file,
[root@renwolecom ~]# mv /var/lib/redis/*.aof /var/lib/redis/appendonly.aof.old
If you have multiple .aof files, please name them separately.
Edit your Redis configuration file to temporarily turn off AOF:
[root@renwolecom ~]# vim /etc/redis/redis.conf appendonly no
The above is the detailed content of Centos 7 backup and restore Redis data. For more information, please follow other related articles on the PHP Chinese website!
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