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Docker搭建RabbitMQ Cluster默认集群

2019-04-19  本文已影响48人  凌雲木

RabbitMQ普通集群
以Dcker搭建的三个队列服务器节点为例


集群配置:一主二从

集群节点在Docker中使用RabbitMQ镜像安装在Docker容器中。容器可以当做一个"轻量级虚拟机",若想访问容器中安装的RabbitMQ,必须把容器的IP端口映射到宿主的IP端口上。这样可通过宿主的IP和端口访问容器中安装的RabbitMQ

Docker的安装可参考之前的文章Ubuntu18.04 安装Docker或者Docker windows安装并启用镜像加速

一 安装rabbitmq镜像:

root@ubuntu:~# docker pull rabbitmq:3.7.14-management
3.7.14-management: Pulling from library/rabbitmq
898c46f3b1a1: Pull complete 
63366dfa0a50: Pull complete 
041d4cd74a92: Pull complete 
6e1bee0f8701: Pull  
d258c5276992: Pull complete 
53e0310df735: Pull complete 
3e509242f4d8: Pull complete 
6e84ccce1c4b: Pull complete 
d18b386cefd0: Pull complete 
90234284e5e4: Pull complete 
3b8f534027af: Pull complete 
746a89596145: Pull complete 
Digest: sha256:a4fcfc7cf432899ffb0f70870460e51587efd4b94f3a1a7bc764c2cd177d99da
Status: Downloaded newer image for rabbitmq:3.7.14-management

二 查看docker安装的镜像

root@ubuntu:~# docker images
REPOSITORY             TAG                      IMAGE ID            CREATED             SIZE
rabbitmq               3.7.14-management        ac01c753758c        3 days ago          213MB
microsoft/dotnet       latest                   389d91a8617b        3 months ago        1.74GB
microsoft/dotnet       2.1-aspnetcore-runtime   e56d8091e0bf        3 months ago        253MB
portainer/portainer    latest                   a01958db7424        4 months ago        72.2MB
hello-world            latest                   4ab4c602aa5e        7 months ago        1.84kB
microsoft/aspnetcore   latest                   db030c19e94b        8 months ago        347MB

三 安装RabbitMQ服务器 rabbit1

root@ubuntu:~# docker run -d --hostname rabbit1 --name myrabbit1 -p 15672:15672 -p 5672:5672 -e RABBITMQ_ERLANG_COOKIE='rabbitcookie' rabbitmq:3.7.14-management
d12ed618ff284efa36aa14fb8d5601e84c3cbf054f915f77da518408784b9e31

参数说明:

-d: 后台进程运行

hostname: RabbitMQ服务机名称

name: 容器名称

-p port:port 本地端口(宿主):容器端口

-p 15672:15672 把容器的15672端口映射到本地端口(宿主)端口15672

-p 5672:5672把容器的5672端口映射到本地端口(宿主)端口5672

四 安装RabbitMQ服务器 rabbit2

注意点:
多个容器之间使用“--link”连接,此属性不能少;link允许容器之间可以通信

启动完成之后,使用:docker ps 查看docker容器中RabbitMq服务器的运行情况。

root@ubuntu:~# docker ps
CONTAINER ID        IMAGE                        COMMAND                  CREATED             STATUS              PORTS                                                                                        NAMES
538b9e21eaed        rabbitmq:3.7.14-management   "docker-entrypoint.s…"   3 minutes ago       Up 3 minutes        4369/tcp, 5671/tcp, 15671-15672/tcp, 25672/tcp, 0.0.0.0:5673->5672/tcp                       myrabbit2
d12ed618ff28        rabbitmq:3.7.14-management   "docker-entrypoint.s…"   5 minutes ago       Up 5 minutes        4369/tcp, 5671/tcp, 0.0.0.0:5672->5672/tcp, 15671/tcp, 25672/tcp, 0.0.0.0:15672->15672/tcp   myrabbit1
a0cc894e9cbb        portainer/portainer          "/portainer"             2 months ago        Up About an hour    0.0.0.0:9000->9000/tcp                                                                       upbeat_cray
39e5dce75509        qwemvc:1.0                   "dotnet WebApplicati…"   3 months ago        Up About an hour    0.0.0.0:60005->60005/tcp                                                                     fcjcontiner3

四 安装RabbitMQ服务器 rabbit3

五 把队列服务器加入到集群中

1 设置节点 rabbit1

进入到节点中执行命令:
docker exec -it myrabbit1 bash
rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl start_app
exit

root@ubuntu:~# docker exec -it myrabbit1 bash
root@rabbit1:/# rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbit1 ...
root@rabbit1:/# rabbitmqctl reset
Resetting node rabbit@rabbit1 ...
root@rabbit1:/# rabbitmqctl start_app
Starting node rabbit@rabbit1 ...
 completed with 3 plugins.
root@rabbit1:/# exit
exit
root@ubuntu:~# 

2 设置节点 rabbit2,加入到集群:

docker exec -it myrabbit2 bash
rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl join_cluster --ram rabbit@rabbit1
rabbitmqctl start_app
exit

root@ubuntu:~# docker exec -it myrabbit2 bash
root@rabbit2:/# rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbit2 ...
root@rabbit2:/# rabbitmqct2 stop_app
bash: rabbitmqct2: command not found
root@rabbit2:/# rabbitmqctl stop_app
Stopping rabbit application on node rabbit@rabbit2 ...
root@rabbit2:/# rabbitmqctl reset
Resetting node rabbit@rabbit2 ...
root@rabbit2:/# rabbitmqctl join_cluster --ram rabbit@rabbit1
Clustering node rabbit@rabbit2 with rabbit@rabbit1
root@rabbit2:/# rabbitmqctl start_app
Starting node rabbit@rabbit2 ...
 completed with 3 plugins.
root@rabbit2:/# exit
exit

参数“--ram”表示设置为内存节点,忽略次参数默认为磁盘节点。

3 设置节点 rabbit3加入到集群:

docker exec -it myrabbit3 bash
rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl join_cluster -- rabbit@rabbit1
rabbitmqctl start_app
exit

设置好之后,进入任意队列服务器节点查看集群情况
使用命令rabbitmqctl cluster_status

root@rabbit3:/# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbit3 ...
[{nodes,[{disc,[rabbit@rabbit1]},{ram,[rabbit@rabbit3,rabbit@rabbit2]}]},
 {running_nodes,[rabbit@rabbit2,rabbit@rabbit1,rabbit@rabbit3]},
 {cluster_name,<<"rabbit@rabbit1">>},
 {partitions,[]},
 {alarms,[{rabbit@rabbit2,[]},{rabbit@rabbit1,[]},{rabbit@rabbit3,[]}]}]
root@rabbit3:/#

使用http://物理机ip:15672 进行访问了,默认账号密码是guest/guest,效果如下图:


image.png

六 其他

要想知道Erlang Cookie位置,首先要取得RabbitMQ启动日志里面的home dir路径,作为根路径。使用:“docker logs 容器名称

root@ubuntu:~# docker logs myrabbit1

  ##  ##
  ##  ##      RabbitMQ 3.7.14. Copyright (C) 2007-2019 Pivotal Software, Inc.
  ##########  Licensed under the MPL.  See https://www.rabbitmq.com/
  ######  ##
  ##########  Logs: <stdout>

              Starting broker...
2019-04-16 02:57:31.142 [info] <0.216.0> 
 Starting RabbitMQ 3.7.14 on Erlang 21.3.4
 Copyright (C) 2007-2019 Pivotal Software, Inc.
 Licensed under the MPL.  See https://www.rabbitmq.com/
2019-04-16 02:57:31.154 [info] <0.216.0> 
 node           : rabbit@rabbit1
 home dir       : /var/lib/rabbitmq
 config file(s) : /etc/rabbitmq/rabbitmq.conf
 cookie hash    : l7FRc4s6MFrXQLBiUlLnOA==
 log(s)         : <stdout>
 database dir   : /var/lib/rabbitmq/mnesia/rabbit@rabbit1

root@ubuntu:~# docker logs myrabbit2
2019-04-16 03:00:07.689 [info] <0.216.0> 
 Starting RabbitMQ 3.7.14 on Erlang 21.3.4
 Copyright (C) 2007-2019 Pivotal Software, Inc.
 Licensed under the MPL.  See https://www.rabbitmq.com/

  ##  ##
  ##  ##      RabbitMQ 3.7.14. Copyright (C) 2007-2019 Pivotal Software, Inc.
  ##########  Licensed under the MPL.  See https://www.rabbitmq.com/
  ######  ##
  ##########  Logs: <stdout>

              Starting broker...
2019-04-16 03:00:07.698 [info] <0.216.0> 
 node           : rabbit@rabbit2
 home dir       : /var/lib/rabbitmq
 config file(s) : /etc/rabbitmq/rabbitmq.conf
 cookie hash    : l7FRc4s6MFrXQLBiUlLnOA==
 log(s)         : <stdout>
 database dir   : /var/lib/rabbitmq/mnesia/rabbit@rabbit2

所以Erlang Cookie的全部路径就是“/var/lib/rabbitmq/.erlang.cookie”。
获取到第一个RabbitMQ的Erlang Cookie之后,只需要把这个文件复制到其他RabbitMQ节点即可。

物理机和容器之间复制命令如下:

容器复制文件到物理机:docker cp 容器名称:容器目录 物理机目录
root@ubuntu:~# docker cp myrabbit1:/var/lib/rabbitmq/.erlang.cookie /home/fcj/Desktop

物理机复制文件到容器:docker cp 物理机目录 容器名称:容器目录
docker cp /home/fcj/Desktop/.erlang.cookie myrabbit1:/var/lib/rabbitmq
设置Erlang Cookie文件权限:“chmod 600 /var/lib/rabbitmq/.erlang.cookie”。

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