Redis connection refused when using traefik - redis

Question

I'm having a hard time trying to configure one redis container for all my applications using traefik. This is my configuration:
1 - Docker compose for Traefik and Redis:
version: '2'
services:
proxy:
container_name: traefik
image: traefik:1.3.6-alpine
command: --docker
ports:
- 80:80
volumes:
- /var/run/docker.sock:/var/run/docker.sock
- ./traefik.toml:/traefik.toml
networks:
- proxy
labels:
- traefik.frontend.rule=Host:monitor.company.dev
- traefik.port=8080
redis:
container_name: main_redis
image: redis:3.2
restart: always
volumes:
- ./data/redis:/data
networks:
- proxy
labels:
- traefik.backend=main-redis
- traefik.default.protocol=http
- traefik.frontend.rule=Host:main-redis.company.dev
- traefik.docker.network=proxy
- traefik.port=6379
networks:
proxy:
external: true
2 - Docker compose for my PHP Application.
version: '2'
services:
...
php:
container_name: myapp_php
build: ./docker/php # php:7.1-fpm base image
networks:
- internal
- proxy
labels:
- traefik.enable=false
- traefik.docker.network=proxy
expose:
- 9000
networks:
proxy:
external: true
internal:
external: false
I tried to connect my php application to main-redis.company.dev on both ports 6379 and 80 but I get a Redis::connect(): connect() failed: Connection refused message.
I also changed these stuff in my redis.conf:
Commented the line with bind 127.0.0.1
And changed protected-mode to no
My docker containers are staying in the same network, so I think it should work. Anyone knows why am I having this problem?

Answer 1

2022 UPDATE to #djeeg answer
For some time now you can use TCP mode for your routers. To do that you need to define the labels with TCP instead of HTTP
labels:
- "traefik.enable=true"
- "traefik.tcp.routers.redis.rule=HostSNI(`redis.example.com`)"
- "traefik.tcp.routers.redis.entrypoints=redis" //6379 entrypoint
- "traefik.tcp.routers.redis.tls.certresolver=myresolver" //let's encrypt resolver
- "traefik.tcp.routers.redis.service=redis"
- "traefik.tcp.services.redis.loadbalancer.server.port=6379"
once you got that working in order to connect assuming you are using TSL you will get error Error: Protocol error, got "H" as reply type byte.
To prevent this you need to do things.
Allow for tls connection in the connection string
Setup SNI for your DNS name or provide public certificate file via cert pr cacert
redis-cli -u redis://redis.example.com:6379 --tls --sni redis.example.com

Answer 2

First off, remove the traefik labels from your redis service definition, traefik is currently (Nov 2017) a HTTP proxy, so you can't expose the endpoint like that
See here:
https://github.com/containous/traefik/issues/10
https://github.com/containous/traefik/issues/1611
Then to connect the php service to the redis service, that looks like you are trying to do that within the same docker instance (rather than externally)
Instead of main-redis.company.dev:6379, it should be like on of these:
redis:6379
main_redis:6379
%PROJECT_NAME%_redis:6379
depending upon how you are deploying the container