RabbitMQ 集群：无法将从节点加入到主节点答案

【问题标题】：RabbitMQ clustering: Can't join slave node to masterRabbitMQ 集群：无法将从节点加入到主节点
【发布时间】：2020-08-06 14:05:23
【问题描述】：

我有两个 RabbitMQ 节点在不同的服务器上使用 docker：

rabbitmq-1.myhost.com（主） rabbitmq-2.myhost.com（从属）

我尝试加入从属到主创建一个两节点集群：

root@rabbitmq-2:/#  rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbitmq-2 ...
root@rabbitmq-2:/# rabbitmqctl join_cluster rabbit@rabbitmq-1.myhost.com

但我明白了：

root@rabbitmq-2:/# rabbitmqctl join_cluster rabbitmq-1.myhost.com
Clustering node rabbit@rabbitmq-2 with rabbitmq-1.myhost.com
Error:
{:badarg, [{:rpc, :rpcify_exception, 2, [file: 'rpc.erl', line: 467]}, {:rpc, :call, 5, [file: 'rpc.erl', line: 410]}, {:lists, :foldl, 3, [file: 'lists.erl', line: 1263]}, {:rabbit_mnesia, :discover_cluster, 1, [file: 'src/rabbit_mnesia.erl', line: 804]}, {:rabbit_mnesia, :join_cluster, 2, [file: 'src/rabbit_mnesia.erl', line: 236]}]}

编辑：我在添加上一行之前复制了我的 /etc/hosts：

root@rabbitmq-2:/# cat /etc/hosts

127.0.0.1localhost

::1 localhost ip6-localhost ip6-loopback

fe00::0 ip6-localnet

ff00::0 ip6-mcastprefix

ff02::1 ip6-allnodes

XX.XX.XX.XX rabbitmq-1.myhost.com rabbitmq-1

YY.YY.YY.YY rabbitmq-2.myhost.com rabbitmq-2

但是当我启动我的 docker 容器时我得到了这个：

Attaching to rabbitmq-2

rabbitmq-2 | 11:02:14.540 [error]

rabbitmq-2 |

rabbitmq-2 | BOOT FAILED

rabbitmq-2 | ===========

rabbitmq-2 | 11:02:14.542 [error] BOOT FAILED

rabbitmq-2 | 11:02:14.543 [error] ===========

rabbitmq-2 | 11:02:14.543 [error] ERROR: epmd error for host rabbitmq-2: address (cannot connect to host/port)

rabbitmq-2 | ERROR: epmd error for host rabbitmq-2: address (cannot connect to host/port)

【问题讨论】：

标签： docker docker-compose rabbitmq debian rabbitmqctl

【解决方案1】：

我终于把两个 IP 与别名（rabbitmq-1 和 rabbitmq-2）添加到 /etc/hosts 并在从节点（rabbitmqctl-2）中使用这些命令：

rabbitmqctl stop_app

rabbitmqctl reset

rabbitmqctl join_cluster rabbit@rabbitmq-1

rabbitmqctl start_app

rabbitmqctl cluster_status

【讨论】：