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<meta property="og:description" content="集群特点 RabbitMQ节点不完全拷贝。所以其他非所有者节点只知道队列的元数据，和指向该队列节点的指针。 集群节点类型 内存节点 磁盘节点 如果集群只有一个磁盘节点，当该节点宕机时，集群仍然运行，但是不能创建Queue，Exchange，Binding， 也不能增加用户，更改权限，集群节点删除和增加也不行。因此为了集群的健壮，应两个磁盘节点。 基于Docker测试集群部署 Docker是现在很流行的容器化技术，它部署方便，资源消耗小。Docker的学习可以查看Docker从入门到实践 首先获取RabbitMQ镜像 docker pull rabbitmq:3-management 利用刚刚获取的镜像启动三个RabbitMQ容器。用docker ps查看是否启动成功。 docker run -d --hostname rabbit1 --name rabbitmq-cluster1 -p 15672:15672 -p 5672:5672 -e RABBITMQ_ERLANG_COOKIE=&#39;rabbitcookie …" />
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<meta name="twitter:description" content="集群特点 RabbitMQ节点不完全拷贝。所以其他非所有者节点只知道队列的元数据，和指向该队列节点的指针。 集群节点类型 内存节点 磁盘节点 如果集群只有一个磁盘节点，当该节点宕机时，集群仍然运行，但是不能创建Queue，Exchange，Binding， 也不能增加用户，更改权限，集群节点删除和增加也不行。因此为了集群的健壮，应两个磁盘节点。 基于Docker测试集群部署 Docker是现在很流行的容器化技术，它部署方便，资源消耗小。Docker的学习可以查看Docker从入门到实践 首先获取RabbitMQ镜像 docker pull rabbitmq:3-management 利用刚刚获取的镜像启动三个RabbitMQ容器。用docker ps查看是否启动成功。 docker run -d --hostname rabbit1 --name rabbitmq-cluster1 -p 15672:15672 -p 5672:5672 -e RABBITMQ_ERLANG_COOKIE=&#39;rabbitcookie …">

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                <a href="./rabbitmqxi-lie-di-san-pian.html">
                    RabbitMQ系列第三篇
                    <small class="subtitle">
                        分布式部署
                    </small>
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                <h4>集群特点</h4>
<p>RabbitMQ节点不完全拷贝。所以其他非所有者节点只知道队列的元数据，和指向该队列节点的指针。</p>
<p><img alt="集群特点" src="./images/rabbitmq-cluster-feature.png"></p>
<h4>集群节点类型</h4>
<ul>
<li>内存节点</li>
<li>磁盘节点</li>
</ul>
<p>如果集群只有一个磁盘节点，当该节点宕机时，集群仍然运行，但是不能创建Queue，Exchange，Binding，
也不能增加用户，更改权限，集群节点删除和增加也不行。因此为了集群的健壮，应两个磁盘节点。</p>
<h4>基于Docker测试集群部署</h4>
<p>Docker是现在很流行的容器化技术，它部署方便，资源消耗小。Docker的学习可以查看<a href="https://yeasy.gitbooks.io/docker_practice/network/linking.html">Docker从入门到实践</a></p>
<p>首先获取RabbitMQ镜像</p>
<div class="highlight"><pre><span></span>docker pull rabbitmq:3-management
</pre></div>


<p>利用刚刚获取的镜像启动三个RabbitMQ容器。用<code>docker ps</code>查看是否启动成功。</p>
<div class="highlight"><pre><span></span>docker run -d --hostname rabbit1 --name rabbitmq-cluster1 -p <span class="m">15672</span>:15672 -p <span class="m">5672</span>:5672 -e <span class="nv">RABBITMQ_ERLANG_COOKIE</span><span class="o">=</span><span class="s1">&#39;rabbitcookie&#39;</span> rabbitmq:3-management
docker run -d --hostname rabbit2 --name rabbitmq-cluster2 -p <span class="m">15673</span>:15672 -p <span class="m">5673</span>:5672 -e <span class="nv">RABBITMQ_ERLANG_COOKIE</span><span class="o">=</span><span class="s1">&#39;rabbitcookie&#39;</span> rabbitmq:3-management
docker run -d --hostname rabbit3 --name rabbitmq-cluster3 -p <span class="m">15674</span>:15672 -p <span class="m">5674</span>:5672 -e <span class="nv">RABBITMQ_ERLANG_COOKIE</span><span class="o">=</span><span class="s1">&#39;rabbitcookie&#39;</span> rabbitmq:3-management
</pre></div>


<p>创建bridge网络模型</p>
<div class="highlight"><pre><span></span>xufan in ~ λ docker network create my-net
da548bf4ff7d59a9b5bea3ca1b15a54ec4eb6474cf13c7023617ee505632c7db
xufan in ~ λ docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
a537e2bf0f6e        allspark_default    bridge              <span class="nb">local</span>
be294ecd2c06        bridge              bridge              <span class="nb">local</span>
13a3502ca0b7        host                host                <span class="nb">local</span>
da548bf4ff7d        my-net              bridge              <span class="nb">local</span>
74271d3b1ef4        none                null                <span class="nb">local</span>
</pre></div>


<p>将上面创建的三个容器连接到自定义的网络my-net上。</p>
<div class="highlight"><pre><span></span>docker network connect my-net rabbitmq-cluster1
docker network connect my-net rabbitmq-cluster2
docker network connect my-net rabbitmq-cluster3
</pre></div>


<p>执行<code>docker exec -it rabbitmq-cluster1 bash</code>进入第1个容器，ping其他两台容器看看是否网络正常联通。如果没有ping命令，可安装<a href="https://stackoverflow.com/questions/39901311/docker-ubuntu-bash-ping-command-not-found">iputils-ping</a></p>
<p>在第2，3个节点执行下面命令加入集群</p>
<div class="highlight"><pre><span></span>rabbitmqctl stop_app
rabbitmqctl reset
rabbitmqctl join_cluster rabbit@rabbit1
rabbitmqctl start_app
</pre></div>


<p>有时会执行失败，后面再抽时间分析下具体原因和解决思路。</p>
<h4>镜像队列</h4>
<p>默认，RabbitMQ集群的队列和消息只存储在一个单一的节点（宣布它的节点）。如果这个节点挂掉，它的Queue和Message都将丢失（Exchange和Binding三个节点都有，因此不会丢失）。因此，RabbitMQ支持镜像队列。每个镜像队列高可用有一个主队列，然后一个或多个从队列。所有的操作先传给主队列，主队列再分发给从队列。如Publisher分发一个消息，只有消息成功分发给所有从队列，才会得到确认。Customer消费消息，不管它连接的是哪个节点，都会转到主节点。镜像队列提升了高可用，但是没有负载均衡的效果（所有节点做相同的工作）</p>


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