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Redis-Sentinel

· 2 min read
Mohammad Zakery

Redis-Sentinel​

Redis

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

Firewall​

caution

Always make changes to the firewall with caution.

Open the Redis ports in firewall.

tcp dport { 6379, 26379 } accept;