predisHow can I set up a Redis failover using PHP?
Setting up a Redis failover using PHP is relatively straight forward. First, you will need to set up two Redis instances, one as the primary and the other as the failover.
Once the two instances are up and running, you can use the phpredis
library to connect to the primary instance.
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
Next, you can use the addServer
method to add the failover instance.
$redis->addServer('127.0.0.1', 6380);
Finally, you can use the setOption
method to set the Redis::OPT_SLAVE_FAILOVER
option to Redis::FAILOVER_DISTRIBUTE
in order to enable the failover feature.
$redis->setOption(Redis::OPT_SLAVE_FAILOVER, Redis::FAILOVER_DISTRIBUTE);
Now your Redis failover is set up and ready to use.
Parts of code explained:
$redis = new Redis();
- This creates a new Redis instance.$redis->connect('127.0.0.1', 6379);
- This connects to the primary Redis instance.$redis->addServer('127.0.0.1', 6380);
- This adds the failover instance.$redis->setOption(Redis::OPT_SLAVE_FAILOVER, Redis::FAILOVER_DISTRIBUTE);
- This sets theRedis::OPT_SLAVE_FAILOVER
option toRedis::FAILOVER_DISTRIBUTE
in order to enable the failover feature.
## Helpful links
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