I am unable to connect (timeout) to a dockerized redis server¹ which was started with the command of:

docker run -it --rm -p 6379:6379 redis:alpine

I've tried to start the server with configs:

set bind to 0.0.0.0
protected-mode no

I am however able to connect to my redis server with another docker container with the following command:

docker run -it --rm redis:alpine redis-cli -h host.docker.internal -p 6379

and also tried configuring the same parameters through cli as well.

When I try to connect the connection times out, I tried with both internal ip

172.17.0.x

and with the internal domain name:

host.docker.internal

to no avail. Further note that I was able to connect to redis server when installed with

brew install redis

on the host.

What am I missing, how can I resolve the issue so that I can connect to redis-server that is within a docker container from the container's host?

Environment details

OS: MacOS Monterey Version: 12.6 (21G115)

Docker version 20.10.17, build 100c701

^{1 _{More specifically I've tried with both rdcli -h host.docker.internal in the mac terminal and also on application side with StackExchange.Redis.}}

CodePudding user response：

More specifically I've tried with both rdcli -h host.docker.internal in the mac terminal

The host.docker.internal is a DNS name to access the docker host from inside a container. It's a bad practice to use this inside one container to talk to another container. Instead you'd create a network, create both containers in that network, and use the container name to connect. When that's done, the port doesn't even need to be published.

From the host, that's when you connect to the published port. Since the container is deployed with -p 6379:6379, you should be able to access that port from the hostname of your host, or localhost on that host:

rdcli -h localhost