无法使用Redis连接到单独的Docker容器

Question

I have redis exposed via a container:

service_redis 0.0.0.0:6379->6379/tcp

And I can even connect to it via redis-cli command with. But what I actually can't do, is to connect to via Go code (which also exists in a separate container, btw)

Here's how my client looks like:

opts := &redis.Options{
    Addr: addr,
    Password: pass,
    DB: db,
}


cli := redis.NewClient(opts)
fmt.Println(master.Ping().Err())
fmt.Println(slave.Get("REAL_KEY").String())

I've tried to put in the addr variable the following:

1. 0.0.0.0:6379 AND 127.0.0.1:6379. The response was e.g.:

<nil>
get REAL KEY: dial tcp 0.0.0.0:6379: connect: connection refused

1. service_redis:6379 with the following response:

<nil>
get REAL KEY: dial tcp: lookup service_redis on 169.254.169.254:53: no such host

How can I solve the problem and what did I wrong?

Answer 1

You could use something like this

docker-compose.yaml

web:
    build: .
    working_dir: /go/src
    ports:
     - "5000:5000"
    volumes:
     - .:/go/src
    links:
     - db
db:
    image: redis
    ports:
     - "6379:6379"

Its creating a link between you containers so they can communicate to eachother. If you don't want to use docker-compose.yaml then you could use the --link flag when building your image