How to implement automatic backup of Redis database in PHP

With the wide application of Redis database in Internet applications, more and more enterprises and developers have begun to pay attention to the backup and protection of Redis database. Automatic backup is an effective means to ensure the security of Redis. This article will introduce how to use PHP to implement automatic backup of the Redis database.

1. Redis database backup

Redis is an open source key-value database. It not only supports basic data types, but also supports complex data structures, such as lists, hash tables and Collection etc. Redis backup can be achieved through RDB and AOF.

RDB backup: Snapshot the Redis data set to the disk within the specified time interval. The backup process will not affect the normal operation of Redis. But RDB backup requires some disk space.

AOF backup: Record all write commands executed by Redis in the form of logs. When Redis is restarted, the original data set is reconstructed based on the logs. AOF backup can ensure data integrity, but recovery time may be time-consuming.

We can choose the appropriate backup method according to actual needs. Next we will introduce how to use PHP to implement automatic backup of Redis database.

2. PHP realizes automatic backup of Redis

1. Install Redis extension

Before using PHP to operate Redis, you need to install the Redis extension first. You can download the Redis extension source code from the official website (http://pecl.php.net/package/redis), and then install it according to the following steps:

(1) Unzip the source code package

tar - zxvf redis-x.x.x.tgz

(2) Enter the Redis extension directory

cd redis-x.x.x

(3) Compile and install the extension

phpize
./configure
make && make install

(4) Add Redis extension configuration

extension=redis.so

2. in the php.ini file Write a backup script

The following is a sample code for using PHP to implement automatic backup of the Redis database. First, we need to define the Redis connection parameters and backup file storage path:

$redis_host = '127.0. 0.1';
$redis_port = 6379;
$redis_auth = 'password';
$backup_dir = '/data/redis_backup/';

Then we define two functions, one with For performing RDB backup, one for performing AOF backup:

//Performing RDB backup
function redis_rdb_backup($backup_dir, $redis_host, $redis_port, $redis_auth) {

$redis = new Redis();
//连接Redis
$redis->connect($redis_host, $redis_port);
//认证
$redis->auth($redis_auth);
//执行RDB备份命令
$result = $redis->save();
if ($result) {
    //将备份文件移动到指定目录
    $filename = date('YmdHis').'.rdb';
    $backup_file = $backup_dir.$filename;
    rename('/var/lib/redis/dump.rdb', $backup_file);
    return $filename;
} else {
    return false;
}

}

//Perform AOF backup
function redis_aof_backup($backup_dir, $redis_host, $redis_port, $redis_auth) {

$redis = new Redis();
//连接Redis
$redis->connect($redis_host, $redis_port);
//认证
$redis->auth($redis_auth);
//执行BGSAVE命令
$redis->bgSave();
while ($redis->lastSave() == false) {
    //等待备份完成
    sleep(1);
}
//将备份文件移动到指定目录
$filename = date('YmdHis').'.aof';
$backup_file = $backup_dir.$filename;
rename('/var/lib/redis/appendonly.aof', $backup_file);
return $filename;

}

Finally we define a scheduled task , execute backup scripts regularly, such as RDB backup at 2 a.m. every day, and AOF backup at 2 a.m. every Sunday:

//Execute backup regularly
$rdb_backup_time = '0 2 *'; //Perform RDB backup at 2 am every day
$aof_backup_time = '0 2 0'; //Perform AOF backup at 2 am every Sunday
//Add scheduled task
exec('echo "'.$rdb_backup_time.' /usr/bin/php /data/backup.php rdb >> /var/log/crontab.log 2>&1" >> /var/ spool/cron/root');
exec('echo "'.$aof_backup_time.' /usr/bin/php /data/backup.php aof >> /var/log/crontab.log 2>&1 ">> /var/spool/cron/root');

3. Summary

Redis database backup is an important means to ensure data security, and automatic backup can effectively reduce backups Operator workload and risk of misoperation. This article introduces the method of using PHP to realize automatic backup of Redis database. I hope it will be helpful to readers in backing up Redis database in actual work.

The above is the detailed content of How to implement automatic backup of Redis database in PHP. For more information, please follow other related articles on the PHP Chinese website!