CentOS 7.2 下 RabbitMQ 集群搭建

实验环境：

操作系统为 CentOS 7.2

IP hostName

• 192.168.190.132 node132
• 192.168.190.139 node139
• 192.168.190.140 node140

RabbitMQ相关端口

•4369 (epmd)
•5672, 5671 (AMQP 0-9-1 and 1.0 without and with TLS)
•25672. This port used by Erlang distribution for inter-node and CLI tools communication and is allocated from a dynamic range (limited to a single port by default, computed as AMQP port + 20000). Seenetworking guide for details.
•15672 (if management plugin is enabled)
•61613, 61614 (if STOMP is enabled)

•1883, 8883 (if MQTT is enabled)

相应端口开启防火墙设置

添加EPEL源

[root@node139 ~]# rpm -Uvh https://dl.Fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

Retrieving https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

warning: /var/tmp/rpm-tmp.2hDPSr: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY

Preparing… ################################# [100%]

Updating / installing…

 1:epel-release-7-8 ################################# [100%]

添加Erlang源

[root@node139 ~]# rpm -Uvh http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm

Retrieving http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm

Preparing… ################################# [100%]

Updating / installing…

 1:erlang-solutions-1.0-1 ################################# [100%]

–2016-11-29 06:34:38– http://packages.erlang-solutions.com/rpm/centos/erlang_solutions.repo

Resolving packages.erlang-solutions.com (packages.erlang-solutions.com)… 31.172.186.53

Connecting to packages.erlang-solutions.com (packages.erlang-solutions.com)|31.172.186.53|:80… connected.

HTTP request sent, awaiting response… 200 OK

Length: 245

Saving to: ‘erlang_solutions.repo’

100%[==========================================================================>] 245 –.-K/s in 0s

2016-11-29 06:34:39 (27.5 MB/s) – ‘erlang_solutions.repo’ saved [245/245]

安装RabbitMQ

软件版本：http://www.rabbitmq.com/releases/rabbitmq-server

[root@node139 ~]# wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.6/rabbitmq-server-3.6.6-1.el7.noarch.rpm

[root@node139 ~]# rpm –import https://www.rabbitmq.com/rabbitmq-signing-key-public.asc

[root@node139 ~]# yum install rabbitmq-server-3.6.6-1.el7.noarch.rpm

启动服务

[root@node139 ~]# systemctl enable rabbitmq-server.service

[root@node139 ~]# systemctl start rabbitmq-server.service

启用RabbitMQ监控插件

[root@node139 ~]# rabbitmq-plugins enable rabbitmq_management

The following plugins have been enabled:

 mochiweb

 webmachine

 rabbitmq_web_dispatch

 amqp_client

 rabbitmq_management_agent

 rabbitmq_management

Applying plugin configuration to rabbit@node139… started 6 plugins.

[root@node139 ~]# netstat -apn | grep 15672

tcp 0 0 0.0.0.0:15672 0.0.0.0:* LISTEN 4119/beam.smp

RabbitMQ用户管理

添加用户（用户名root，密码admin）

[root@node139 ~]# rabbitmqctl add_user admin admin

设置用户角色（设置admin用户为管理员角色）

[root@node139 ~]# rabbitmqctl set_user_tags admin administrator

Setting tags for user “admin” to [administrator] …

设置用户权限（设置admin用户配置、写、读的权限）

[root@node139 ~]# rabbitmqctl set_permissions -p / admin “.*” “.*” “.*”

Setting permissions for user “admin” in vhost “/” …

删除用户（删除guest用户）

[root@node139 ~]# rabbitmqctl delete_user guest

RabbitMQ集群配置

集群配置在单机配置完成的基础上进行

以下以node140为例，node132需要做同样的操作
•添加/etc/hosts条目

在node132、node139、node140里的/etc/hosts文件中分别添加：

192.168.190.132 node132
192.168.190.139 node139
192.168.190.140 node140

 
•设置每个节点Cookie

Rabbitmq的集群是依赖于erlang的集群来工作的，所以必须先构建起erlang的集群环境。Erlang的集群中各节点是通过一个magic cookie来实现的，这个cookie存放在 /var/lib/rabbitmq/.erlang.cookie 中，文件是400的权限。所以必须保证各节点cookie保持一致，否则节点之间就无法通信

[root@node140 /]# echo -n “AZVOCZYZZBVFLBPTBXU” > /var/lib/rabbitmq/.erlang.cookie

[root@node140 ~]# chown rabbitmq:root /var/lib/rabbitmq/.erlang.cookie

[root@node140 /]# chmod 600 /var/lib/rabbitmq/.erlang.cookie

[root@node140 /]# cat /var/lib/rabbitmq/.erlang.cookie

AZVOCZYZZBVFLBPTBXU

启动服务

[root@node140 ~]# systemctl start rabbitmq-server.service

[root@node140 ~]# rabbitmq-server -detached

开通防火墙

[root@node140 ~]# firewall-cmd –permanent –add-port={4369/tcp,25672/tcp}

success

[root@node140 ~]# firewall-cmd –reload

success

•加入集群

默认是磁盘节点，如果是内存节点的话，需要加–ram参数

[root@node140 ~]# rabbitmqctl stop_app

Stopping node rabbit@node140 …

[root@node140 ~]# rabbitmqctl join_cluster rabbit@node139

Clustering node rabbit@node140 with rabbit@node139 …

[root@node140 ~]# rabbitmqctl start_app

Starting node rabbit@node140 …

•设置镜像策略

[root@node140 ~]# rabbitmqctl set_policy ha-all “^” ‘{“ha-mode”:”all”,”ha-sync-mode”:”automatic”}’

Setting policy “ha-all” for pattern “^” to “{\”ha-mode\”:\”all\”,\”ha-sync-mode\”:\”automatic\”}” with priority “0” …

启用RabbitMQ监控插件

cluster搭建起来后若在web管理工具中rabbitmq_management的Overview的Nodes部分看到”Node statistics not available”的信息，说明在该节点上web管理插件还未启用。

[root@node140 ~]# rabbitmq-plugins enable rabbitmq_management

集群配置好后，可以在 RabbitMQ 任意节点上执行下面的命令来查看是否集群配置成功。

[root@node140 ~]# rabbitmqctl cluster_status

其它节点需要做同样的操作

登录站点http://192.168.190.139:15672/

安装中遇到的问题：

这个/var/lib/rabbitmq/.erlang.cookie文件需要修改文件所有者和文件的权限为rw，否则rabbitmq服务无法启动；