RabbitMQ 仅限于一个从属

Question

在 AWS 上部署时，我遇到了 rabbitmq 的一个奇怪问题。

当我启动主服务器并将从服务器连接到它时，一切都很顺利，集群中有两个服务器。当我将第二个从服务器添加到主服务器时，它只是挂在 join_cluster 上，并将无限期等待而不会抛出任何错误。一旦我停止第一个从服务器，第二个从服务器就会立即加入。我找不到有这个问题的人或任何限制从服务器数量的设置。

这是我在主机文件中添加一个指向主服务器的 IP 条目后在两个从服务器上运行的步骤

rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl join_cluster rabbit@master
rabbitmqctl start_app

这是我的 rabbitmq.config 文件。

    [
 {rabbit,
  [
   {tcp_listeners, [{{ rabbitmq_amqp_port }}]},

   %% SSL listeners are configured in the same fashion as TCP listeners,
   %% including the option to control the choice of interface.
   %%
   %% {ssl_listeners, [5671]},

   %% Maximum time for AMQP 0-8/0-9/0-9-1 handshake (after socket connection
   %% and SSL handshake), in milliseconds.
   %%
   %% {handshake_timeout, 10000},

    {log_levels, [{connection, info}]},
    {loopback_users, [<<"{{ rabbitmq_loopback_user }}">>]},

   %% Configuring SSL.
   %% See http://www.rabbitmq.com/ssl.html for full documentation.
   %%
   %% {ssl_options, [{cacertfile,           "/path/to/testca/cacert.pem"},
   %%                {certfile,             "/path/to/server/cert.pem"},
   %%                {keyfile,              "/path/to/server/key.pem"},
   %%                {verify,               verify_peer},
   %%                {fail_if_no_peer_cert, false}]},
    {default_vhost,       <<"{{ rabbitmq_default_vhost }}">>},
    {default_user,        <<"{{ rabbitmq_default_user }}">>},
    {default_pass,        <<"{{ rabbitmq_default_pass }}">>},
    {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},
    {default_user_tags, [{{ rabbitmq_default_user_tags }}]},
    {channel_max, 128},

   %% Customising Socket Options.
   %%
   %% See (http://www.erlang.org/doc/man/inet.html#setopts-2) for
   %% further documentation.
   %%
   %% {tcp_listen_options, [binary,
   %%                       {packet,        raw},
   %%                       {reuseaddr,     true},
   %%                       {backlog,       128},
   %%                       {nodelay,       true},
   %%                       {exit_on_close, false}]},

    {vm_memory_high_watermark, {{ rabbitmq_high_watermark }} },
    {vm_memory_high_watermark_paging_ratio, {{ rabbitmq_high_watermark_paging }} },

   %% Set disk free limit (in bytes). Once free disk space reaches this
   %% lower bound, a disk alarm will be set - see the documentation
   %% listed above for more details.
   %%
   %% {disk_free_limit, 50000000},

      {disk_free_limit, {mem_relative, {{rabbitmq_disk_free_limit}} }}

   %% Make clustering happen *automatically* at startup - only applied
   %% to nodes that have just been reset or started for the first time.
   %% See http://www.rabbitmq.com/clustering.html#auto-config for
   %% further details.
   %%
   %% {cluster_nodes, {['[email protected]'], disc}},
  ]}
].

完整文章可在 rabbitmq 邮件列表上查看https://groups.google.com/forum/#!topic/rabbitmq-users/Mzb2EhFUD0w