Deploying Redis Sentinel with Portainer and Integrating It into Spring Boot

The article introduces Portainer as a graphical Docker management tool and shows how to install it via a simple docker-compose -f portainer.yml up command, then run it in detached mode with docker-compose -f portainer.yml up -d .

It then demonstrates a practical deployment of Redis Sentinel using Portainer: a master node, two slave nodes, and three sentinel nodes are defined in redis-cluster.yml and redis-sentinel.yml Docker‑compose files, with careful port mappings and password settings.

After creating a custom bridge network named redis-sentinel , the containers are attached to this network to isolate them from other services. The guide shows how to join containers to the network via Portainer’s UI.

Sentinel configuration files are provided, illustrating how to monitor the master, set authentication, and define failover parameters. The article explains testing the setup by stopping the master container and observing automatic promotion of a slave.

For Spring Boot integration, the tutorial adds spring-boot-starter-data-redis and commons-pool2 dependencies, explains why Lettuce is preferred over Jedis, and shows the relevant Maven snippets.

The Spring Boot configuration uses spring.redis.sentinel properties to point to the sentinel nodes, includes password settings, and configures a Lettuce connection pool (max‑idle, max‑active, min‑idle, max‑wait).

Code examples demonstrate injecting RedisTemplate , defining a simple DTO, and creating REST endpoints for setting and getting string keys, followed by test screenshots confirming successful read/write operations through the sentinel cluster.