Redis-Sentinel

• Install Redis on Debian

1.Update Debian System Packages.

sudo apt update

2.Install Required Packages.

sudo apt install software-properties-common apt-transport-https curl ca-certificates -y

3.Install Redis with APT Debian Repository.

sudo apt install redis redis-server redis-tools redis-sentinel

4.Activate the redis-sentinel service to start on boot.

sudo systemctl enable redis-server --now

• Redis-1 Configuration

Edit /etc/redis/redis.conf

protected-mode yes
port 6379
masterauth complex-password-here
requirepass complex-password-here
bind redis-1-IP

• Redis-2 Configuration

Edit /etc/redis/redis.conf

protected-mode yes
port 6379
replicaof redis-1-IP 6379
masterauth complex-password-here
requirepass complex-password-here
bind redis-2-IP

• Redis-3 Configuration

Edit /etc/redis/redis.conf

protected-mode yes
port 6379
replicaof redis-1-IP 6379
masterauth a-very-complex-password-here
requirepass complex-password-here
bind redis-3-IP

• Redis-Sentinel-1 & Redis-Sentinel-2 & Redis-Sentinel-3 Configuration

Edit /etc/redis/sentinel.conf

port 26379
sentinel monitor mymaster redis-1-IP 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster complex-password-here
protected-mode no

Next

redis-cli -p 26379
127.0.0.1:26379> sentinel master mymaster

• Check Sentinels

Run this command To check the Redis sentinel information.

redis-cli -h redis-(1-2-3)-IP -p 26379
redis-IP:26379> info sentinel

OR

redis-cli -p 26379
redis-IP:26379> info sentinel

• Check Replication

Run this command To check the Redis replication information.

redis-cli -h redis-(1-2-3)-IP
redis-IP:6379> auth complex-password-here
OK
redis-IP:6379> info replication