Rest API Unable to connect to Redis inside Docker

I'm having trouble connecting my Spring Boot application to Redis in a Docker environment. While my application connects successfully to PostgreSQL in the same Docker network, Redis connections fail with:

Can you help me to fix this issue, so with that my API application will be able to send requests to Redis even inside the Docker.

Obs: If I run my Rest API application locally (not in docker) and I call any endpoint that use Redis, it works as expected, the issue is only inside docker.

message:

{
    "apiPath": "uri=/v1/devices/38",
    "errorCode": "INTERNAL_SERVER_ERROR",
    "errorMessage": "Unable to connect to Redis",
    "errorTime": "2025-03-28T16:57:26.309001832"
}

docker-compose:

version: '3.8'

services:
  postgres:
    image: postgres:latest
    environment:
      POSTGRES_DB: devicedb
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: admin
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U admin"]
      interval: 30s
      timeout: 10s
      retries: 5

  redis:
    image: "redis"
    ports:
      - "6379:6379"
    command: redis-server --appendonly yes --requirepass admin  # Added password requirement
    healthcheck:
      test: ["CMD", "redis-cli", "-a", "admin", "ping"]  # Added auth for healthcheck
      interval: 30s
      timeout: 10s
      retries: 5

  app:
    build: .
    ports:
      - "8080:8080"
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    environment:
      SPRING_DATASOURCE_URL: jdbc:postgresql://postgres:5432/devicedb
      SPRING_DATASOURCE_USERNAME: admin
      SPRING_DATASOURCE_PASSWORD: admin
      SPRING_REDIS_HOST: redis
      SPRING_REDIS_PORT: 6379
      SPRING_REDIS_PASSWORD: admin 

volumes:
  postgres_data:

application.properties

spring.application.name=ManageDevices

server.port=8080
server.address=0.0.0.0

spring.datasource.url=jdbc:postgresql://postgres:5432/devicedb
spring.datasource.username=admin
spring.datasource.password=admin
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=update

spring.redis.host=redis
spring.redis.port=6379
spring.redis.password=admin

The problem is that you are trying to connect to a redis container without bridging your host network with the container.

either add a network property or use localhost:

networks:
  app-net:
    driver: bridge

you then add a network property for bother services

networks:
  - app-net

after that you'll be able to connect from your application using the container name redis or using 127.0.0.1