ruby-on-rails - 在 Vagrant 机器上连接到 Redis

Question

我试图解决从 Rails 服务器连接到 Redis 服务器时出现的这个错误，两者都在 Vagrant VM 中运行:

Redis::CannotConnectError: Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED)

我认为，我可以通过以下方式验证 Redis 服务器是否正在运行:

ps aux | grep redis
redis      839  0.1  0.1  35140  1840 ?        Ssl  00:21   0:00 /usr/local/bin/redis-server *:6379 
vagrant   1220  0.0  0.0  11676   952 pts/0    R+   00:22   0:00 grep --color=auto redis

sudo netstat -tnlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:6379            0.0.0.0:*               LISTEN      839/redis-server *:
tcp        0      0 0.0.0.0:57102           0.0.0.0:*               LISTEN      778/rpc.statd
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      507/rpcbind
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      725/sshd
tcp6       0      0 :::6379                 :::*                    LISTEN      839/redis-server *:
tcp6       0      0 :::111                  :::*                    LISTEN      507/rpcbind
tcp6       0      0 :::22                   :::*                    LISTEN      725/sshd
tcp6       0      0 :::49667                :::*                    LISTEN      778/rpc.statd

我的 redis.conf 中有这个:

# Accept connections on the specified port, default is 6379.
# If port 0 is specified Redis will not listen on a TCP socket.
port 6379

# If you want you can bind a single interface, if the bind option is not
# specified all the interfaces will listen for incoming connections.
#
bind 127.0.0.1

和 Vagrantfile:

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.box = "ubuntu-12.04-amd64"

  # THE URL FROM WHERE THE 'CONFIG.VM.BOX' BOX WILL BE FETCHED IF IT
  # DOESN'T ALREADY EXIST ON THE USER'S SYSTEM.
  config.vm.box_url = "http://files.vagrantup.com/precise64.box"

  config.vm.network "forwarded_port", guest: 6379, host: 6379, auto_correct: true

  config.vm.provider "virtualbox" do |v|
    v.customize ["modifyvm", :id, "--memory", "1024"]
    v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
  end

  config.vm.provision "shell", path: "init.sh"
end

我尝试关注 canonical entry但我没有取得任何进展。这可能是我忽略的显而易见的事情。有人可以为我指出正确的方向吗？我还可以尝试什么？

编辑:完整错误信息:

$redis = Redis.new(:host => '127.0.0.1', :port => 6379)
=> #<Redis client v3.2.2 for redis://127.0.0.1:6379/0>
$redis.set('a', 'b')
Redis::CannotConnectError: Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED)

编辑:注释掉绑定(bind) 127.0.0.1 并能够从 redis 框 ping 但 Rails 仍然没有运气:

redis-cli -h 127.0.0.1 ping
PONG

Answer 1

我明白了，我需要使用我的 VM (VirtualBox) 适配器的 IP 地址才能让它在我的 Windows 机器上运行。这有效:

$redis = Redis.new(:host => '192.168.56.1', :port => 6379)
=> #<Redis client v3.2.2 for redis://192.168.56.1:6379/0>
$redis.set('a', 'b')
=> "OK"
$redis.get('a')
=> "b"