By synchronizing Redis, we can have a Slave with the Master’s data synchronized in real-time. This way, if the Master fails, we can point to the Slave and keep working. Additionally, if we have a lot of traffic, we can balance the readings between the two servers.

We compile and install Redis:

MASTER

We bind the service to all IPs and assign an access password:

bind 0.0.0.0
requirepass PASSWORD

We apply the configuration:

SLAVE

We indicate to the Slave which is its Master and the associated password. Additionally, we assign an access password to itself:

bind 0.0.0.0
requirepass PASSWORD2
slaveof MASTER_IP 6379
masterauth PASSWORD

We check that it is synchronized:

# Replication
role:slave
master_host:MASTER_IP
master_port:6379
master_link_status:up