【Linux】【Services】【MessageQueue】搭建高可用rabbitMQ

1. 简介

1.1. 官方网站： https://www.rabbitmq.com/

1.2. 配置文档：https://docs.openstack.org/ha-guide/shared-messaging.html#rabbitmq-configure

2. 安装与配置：

功能与组件	机器名	服务IP	管理IP	Processor Cores	RAM	Storage	备注
Mongo/Redis/RabbitMQ/Memorycached	HCTJOSCACHE01	10.30.2.45	172.16.0.45
Mongo/Redis/RabbitMQ/Memorycached	HCTJOSCACHE02	10.30.2.46	172.16.0.46
Mongo/Redis/RabbitMQ/Memorycached	HCTJOSCACHE03	10.30.2.47	172.16.0.47

2.1. 安装：在每个节点上都做

直接使用yum安装，openstack的yum源中会提供安装包

yum install rabbitmq-server

启动服务（确认cookie文件已经生成）

 ~]# systemctl start rabbitmq-server
 ~]# ll /var/lib/rabbitmq/.erlang.cookie
-r-------- 1 rabbitmq rabbitmq 20 Dec  6 00:00 /var/lib/rabbitmq/.erlang.cookie

创建用户

#前面的openstack是用户名，后面的openstack是密码
rabbitmqctl add_user openstack openstack

Creating user "openstack" ...

赋权限

rabbitmqctl set_permissions openstack ".*" ".*" ".*"
 
Setting permissions for user "openstack" in vhost "/" ...

停止rabbitMQ

systemctl stop rabbitmq-server

2.2. 配置

在节点01上，把cookie文件scp到另外两个节点上

scp /var/lib/rabbitmq/.erlang.cookie root@hctjoscache02:/var/lib/rabbitmq/.erlang.cookie
scp /var/lib/rabbitmq/.erlang.cookie root@hctjoscache03:/var/lib/rabbitmq/.erlang.cookie

在节点02/03上分别修改权限

# chown rabbitmq:rabbitmq /var/lib/rabbitmq/.erlang.cookie
# chmod 400 /var/lib/rabbitmq/.erlang.cookie

在节点01上启动服务并查看集群状态

[root@hctjoscache01 yum.repos.d]# systemctl start rabbitmq-server.service
[root@hctjoscache01 yum.repos.d]# rabbitmqctl cluster_status
Cluster status of node rabbit@hctjoscache01 ...
[{nodes,[{disc,[rabbit@hctjoscache01]}]},
 {running_nodes,[rabbit@hctjoscache01]},
 {cluster_name,<<"rabbit@hctjoscache01.hccos.cn">>},
 {partitions,[]},
 {alarms,[{rabbit@hctjoscache01,[]}]}]

在节点02和03上启动服务，停止本机服务，加入01的集群（成功加入以后，再启动服务就不用执行stop_app了）

[root@hctjoscache02 ~]# systemctl start rabbitmq-server
[root@hctjoscache02 ~]# rabbitmqctl stop_app
Stopping node rabbit@hctjoscache02 ...
[root@hctjoscache02 ~]# rabbitmqctl join_cluster --ram rabbit@hctjoscache01
Clustering node rabbit@hctjoscache02 with rabbit@hctjoscache01 ...

[root@hctjoscache03 ~]# systemctl start rabbitmq-server
[root@hctjoscache03 ~]# rabbitmqctl stop_app
Stopping node rabbit@hctjoscache03 ...
[root@hctjoscache03 ~]# rabbitmqctl join_cluster --ram rabbit@hctjoscache01
Clustering node rabbit@hctjoscache03 with rabbit@hctjoscache01 ...

在01节点上查看状态

[root@hctjoscache01 yum.repos.d]# rabbitmqctl cluster_status
Cluster status of node rabbit@hctjoscache01 ...
[{nodes,[{disc,[rabbit@hctjoscache01]},
         {ram,[rabbit@hctjoscache03,rabbit@hctjoscache02]}]},
 {running_nodes,[rabbit@hctjoscache01]},
 {cluster_name,<<"rabbit@hctjoscache01.hccos.cn">>},
 {partitions,[]},
 {alarms,[{rabbit@hctjoscache01,[]}]}]

配置一下ha的模式，我没太明白官方文档中的意思，不过看起来是说这样配置的话可以实现HA模式，消息可以镜像到其他的节点

rabbitmqctl set_policy ha-all '^(?!amq\.).*' '{"ha-mode": "all"}'