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<p><a href="elma365-on-premises.html">BRIX On-Premises</a> > <a href="infrastructure-preparation.html">Prepare infrastructure</a> > Load balancer / Configure HAProxy for RabbitMQ</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">Configure HAProxy for RabbitMQ</span></h1>
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<p class="p_Normal">Highly available BRIX cluster architecture involves the interaction of BRIX application microservices with a RabbitMQ message broker cluster. To evenly balance traffic between RabbitMQ cluster servers, install a HAProxy configuration. This will ensure stable system operation in case of a failure.</p>
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<h2 class="p_Heading2"><span class="f_Heading2">Example of a HAProxy configuration for RabbitMQ</span></h2>
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<p class="p_Normal">This configuration is prepared for load balancing traffic in a RabbitMQ cluster deployed according to the instructions in <a href="configure-rabbitmq.html" class="topiclink">RabbitMQ cluster</a>. HAProxy is used for this, providing the following:</p>
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<ul style="list-style-type:disc">
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<li class="p_Normal">Balancing client connections (AMQP) coming to <code><b>haproxy-server.your_domain:5672</b></code> across the cluster servers.</li><li class="p_Normal">Proxying client connections to the RabbitMQ web interface (HTTP-based API) coming to<span style="font-weight: bold;"> </span><code><b>haproxy-server.your_domain:15672</b></code>.</li></ul>
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<p class="p_Normal">In order to create a HAProxy configuration for RabbitMQ, follow these steps:</p>
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<ol style="list-style-type:upper-roman">
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<li value="1" class="p_Normal">Open the <code><b>haproxy.cfg</b></code> configuration file for editing using the following command:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid; margin: 0 0 0 34px;"><span class="f_CodeExample">sudo nano /etc/haproxy/haproxy.cfg</span></p>
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<ol style="list-style-type:upper-roman" start="2">
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<li value="2" class="p_Normal">Edit the <code><b>haproxy.cfg</b></code> configuration file:</li></ol>
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<p class="p_Normal" style="margin: 0 0 0 34px;"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1')">Configuration example:</a></p>
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<div id="TOGGLE0186A1" class="dropdown-toggle-body" style="text-align: left; text-indent: 0; line-height: 1.80; padding: 0 0 0 0; margin: 0 0 0 34px;"><table style="border:none; border-spacing:0;">
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<tr>
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<td style="vertical-align:top; padding:0; border:none"><p class="p_CodeExample" style="line-height: 1.80; white-space: normal; page-break-inside: auto; margin: 0 0 0 34px;"><span class="f_CodeExample">### RabbitMQ ###</span><br />
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<span class="f_CodeExample">listen rabbitmq</span><br />
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<span class="f_CodeExample"> bind haproxy-server.your_domain:5672</span><br />
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<span class="f_CodeExample"> mode tcp</span><br />
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<span class="f_CodeExample"> balance roundrobin</span><br />
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<span class="f_CodeExample"> server rabbitmq-server1 rabbitmq-server1.your_domain:5672 check inter 2s rise 2 fall 3</span><br />
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<span class="f_CodeExample"> server rabbitmq-server2 rabbitmq-server2.your_domain:5672 check inter 2s rise 2 fall 3</span><br />
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<span class="f_CodeExample"> server rabbitmq-server3 rabbitmq-server3.your_domain:5672 check inter 2s rise 2 fall 3</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">listen rabbitmq_management</span><br />
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<span class="f_CodeExample"> bind haproxy-server.your_domain:15672</span><br />
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<span class="f_CodeExample"> balance source</span><br />
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<span class="f_CodeExample"> server rabbitmq-server1 rabbitmq-server1.your_domain:15672 check inter 2s</span><br />
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<span class="f_CodeExample"> server rabbitmq-server2 rabbitmq-server2.your_domain:15672 check inter 2s</span><br />
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<span class="f_CodeExample"> server rabbitmq-server3 rabbitmq-server3.your_domain:15672 check inter 2s</span><br />
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<span class="f_CodeExample">### RabbitMQ ###</span></p>
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</td>
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</tr>
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</table>
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</div>
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<p class="p_Normal" style="margin: 0 0 0 34px;"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A2')">Example of a HAProxy configuration with SSL</a></p>
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<div id="TOGGLE0186A2" class="dropdown-toggle-body" style="text-align: left; text-indent: 0; line-height: 1.80; padding: 0 0 0 0; margin: 0 0 0 34px;"><table style="border:none; border-spacing:0;">
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<tr>
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<td style="vertical-align:top; padding:0; border:none"><p class="p_Normal" style="margin: 0 0 0 34px;">Enabling SSL is possible if OpenSSL support is built in. In the <code><b>crt</b></code> parameter, specify the path to the PEM file containing the required certificates and associated private keys (<a href="fullchain-sertificate.html" class="topiclink">fullchain certificate</a>). If the file does not contain a private key, HAProxy will attempt to load the key from the same path with a <span style="font-weight: bold;">.key</span> suffix.</p>
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<p class="p_Normal" style="margin: 0 0 0 34px;"> </p>
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<p class="p_Normal" style="margin: 0 0 0 34px;">If a directory name is used instead of a PEM file, all files found in that directory will be loaded in alphabetical order, excluding files ending in <span style="font-weight: bold;">.issuer</span>, <span style="font-weight: bold;">.ocsp</span>, and <span style="font-weight: bold;">.sctl</span> (reserved solutions).</p>
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<p class="p_Normal" style="margin: 0 0 0 34px;"> </p>
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<p class="p_Normal" style="margin: 0 0 0 34px;">In the <code><b>ca-file</b></code> parameter, specify the path to the PEM file containing the root certificate. For more details, refer to the <span style="font-weight: bold;">Configuration Manual</span> for the used version of HAProxy. Example for <a href="https://cbonte.github.io/haproxy-dconv/2.5/configuration.html#5.1-crt" class="weblink">HAProxy 2.5</a>:<br />
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</p>
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<p class="p_CodeExample" style="line-height: 1.80; white-space: normal; page-break-inside: auto; margin: 0 0 0 34px;"><span class="f_CodeExample">### RabbitMQ ###</span><br />
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<span class="f_CodeExample">listen rabbitmq</span><br />
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<span class="f_CodeExample"> bind haproxy-server.your_domain:5671 ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem</span><br />
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<span class="f_CodeExample"> mode tcp</span><br />
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<span class="f_CodeExample"> balance roundrobin</span><br />
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<span class="f_CodeExample"> server rabbitmq-server1 rabbitmq-server1.your_domain:5671 check inter 2s rise 2 fall 3 ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample"> server rabbitmq-server2 rabbitmq-server2.your_domain:5671 check inter 2s rise 2 fall 3 ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample"> server rabbitmq-server3 rabbitmq-server3.your_domain:5671 check inter 2s rise 2 fall 3 ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">listen rabbitmq_management</span><br />
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<span class="f_CodeExample"> bind haproxy-server.your_domain:15671 ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem</span><br />
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<span class="f_CodeExample"> balance source</span><br />
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<span class="f_CodeExample"> server rabbitmq-server1 rabbitmq-server1.your_domain:15671 check inter 2s ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample"> server rabbitmq-server2 rabbitmq-server2.your_domain:15671 check inter 2s ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample"> server rabbitmq-server3 rabbitmq-server3.your_domain:15671 check inter 2s ssl crt /etc/haproxy/ssl/haproxy-server.your_domain.pem ca-file /etc/haproxy/ssl/rootCA.your_domain.pem</span><br />
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<span class="f_CodeExample">### RabbitMQ ###</span></p>
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</td>
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<ol style="list-style-type:upper-roman" start="3">
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<li value="3" class="p_Normal">Restart HAProxy to apply changes:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid; margin: 0 0 0 34px;"><span class="f_CodeExample">sudo systemctl restart haproxy</span></p>
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