spring-boot-version: 3.2.4

redis config:

spring:
  data:
    redis:
      host: [docker-server-name]
      port: 6379

no password, so error message is: io.lettuce.core.RedisConnectionException: Unable to connect to [docker-server-name]/:6379

but use local env file ,just change host: localhost is ok

eg:

spring:
  data:
    redis:
      host: localhost
      port: 6379

important： spring-boot version: 3.0.4

spring:
  data:
    redis:
      host: [docker-server-name]
      port: 6379

this config is ok

Comment From: wilkinsona

Thanks for the report but I don't think this is a Spring Boot problem. It's clear from the error message that the correct configuration has been passed into Lettuce as it knows to try to connect to [docker-server-name] on port 6379. Exactly how it uses that configuration to connect to Redis is out of Spring Boot's control. I would guess that there's a networking or Docker DNS problem such that [docker-server-name] isn't being resolved to the correct IP.