$ docker --version
Docker version 20.10.12, build 20.10.12-0ubuntu4
$ docker run -it c92e3dc29000
root@fb45221ab9cd:/app# irb
irb(main):001:0> require 'redis'
irb(main):002:0> r=Redis.new
=> #<Redis client v4.7.1 for redis://host.docker.internal:6379/0>
お!!
irb(main):003:0> r.ping
Traceback (most recent call last):
:
Redis::CannotConnectError (Error connecting to Redis on host.docker.internal:6379 (SocketError))
ありゃー
ホストではサーバ走ってるんだけどねー
$ bundle exec irb
irb(main):001:0> require 'redis'
irb(main):002:0> r=Redis.new
=> #<Redis client v4.7.1 for redis://127.0.0.1:6379/0>
irb(main):003:0> r.ping
=> "PONG"
Follow
Dockerfileから見てたのかな
ENV REDIS_URL=${REDIS_URL:-redis://host.docker.internal:6379}
この行を消した子だと
$ docker run -it aef27f97f96c
root@8ee1bb005b2e:/app# irb
irb(main):001:0> require 'redis'
irb(main):002:0> r=Redis.new
=> #<Redis client v4.7.1 for redis://127.0.0.1:6379/0>
irb(main):003:0> r.ping
:
Redis::CannotConnectError (Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED))
うん。