Rspamd does not connect to Redis

[setfire2]

Summary

The Rspamd inside the container does not connet to Redis in another container. The redis-cli inside the Rspamd container does connect.

Steps to reproduce

This happens when executing rspamd configwizard

[tiredofit/rspamd:1.7.8 20:03:52 /] $ rspamadm configwizard
...
Do you wish to set Redis servers?[Y/n]: 
Input read only servers separated by `,` [default: localhost]: 172.22.0.8
Input write only servers separated by `,` [default: 172.22.0.8]: 
Do you have any username set for your Redis (ACL SETUSER and Redis 6.0+)[y/N]: y
Enter Redis username:rspamd
Enter Redis password:rspamdpw
Do you have any specific database for your Redis?[y/N]: y
Enter Redis database:0
Do you want to setup dkim signing feature?[y/N]: 
cannot prepare redis connection (authentication or db selection failure): Operation timed out
Cannot connect to Redis server

The connection with redis-cli works:

[tiredofit/rspamd:1.7.8 20:09:01 /] $ redis-cli -h 172.22.0.8
172.22.0.8:6379> AUTH rspamd rspamdpw
OK
172.22.0.8:6379> SELECT 0
OK
172.22.0.8:6379> KEYS *
(empty array)

I tried this with version 7 as well as with version 6 images of Redis.

What is the expected correct behavior?

The Rspamd configwizard should be able to connect to Redis

Environment

• Image version / tag: tiredofit/rspamd:1.7.8

• Host OS: Ubuntu 22.04.3 LTS

• docker-compose.yaml:

version: "3.6"
services:

  rspamd:
    container_name: "rspamd"
    image: "tiredofit/rspamd:1.7.8"
    restart: "unless-stopped"
    hostname: "rspamd"
    expose:
      - "11332/tcp"
      - "11333/tcp"
      - "11334/tcp"
    networks:
      - "docker-internal"
    extra_hosts:
      - "host.docker.internal:host-gateway"
    environment:
      TZ: "Europe/Berlin"
    volumes:
      - "/container/rspamd/conf:/usr/share/rspamd/config/"
      - "/container/rspamd/data:/var/lib/rspamd"
    depends_on:
      - "redis"
    logging:
      options:
        max-size: "5m"
        max-file: "2"

  redis:
    container_name: "redis"
    image: "redis:7.2.3"
    restart: "unless-stopped"
    hostname: "redis"
    expose:
      - "6379/tcp"
      #    ports:
      #      - "172.17.0.1:9085:80"
    networks:
      - "docker-internal"
    extra_hosts:
      - "host.docker.internal:host-gateway"
    environment:
      TZ: "Europe/Berlin"
    volumes:
      - "/container/redis/data:/data"
      - "/container/redis/conf:/usr/local/etc/redis/"
    entrypoint: redis-server /usr/local/etc/redis/redis.conf
    logging:
      options:
        max-size: "5m"
        max-file: "2"

networks:
  docker-internal:
    name: "docker-internal"
    driver: "bridge"

Possible fixes