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<p><a href="elma365-on-premises.html">BRIX On-Premises</a> &gt; <a href="infrastructure-preparation.html">Prepare infrastructure</a> &gt; Load balancer / Configure HAProxy for BRIX web&nbsp;</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">HAProxy configuration for BRIX web</span></h1>
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<p class="p_Normal">The architecture of a highly available BRIX cluster involves the interaction of BRIX application microservices within a resilient cluster. To evenly balance traffic between Kubernetes cluster servers, install a HAProxy configuration. This will ensure stable system operation in case of a failure.</p>
<h2 class="p_Heading2"><span class="f_Heading2">Example HAProxy configuration for BRIX web</span></h2>
<p class="p_Normal">This article presents a HAProxy configuration that balances client connections coming to <code><b>elma365.your_domain</b></code> between Kubernetes cluster servers.</p>
<p class="p_Normal">In order to create a HAProxy configuration for BRIX web, perform the following actions:</p>
<ol style="list-style-type:upper-roman">
<li value="1" class="p_Normal">Open the <code><b>haproxy.cfg</b></code> configuration file for editing using the following command:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid; margin: 0 0 0 34px;"><span class="f_CodeExample">sudo&nbsp;nano&nbsp;/etc/haproxy/haproxy.cfg</span></p>
<ol style="list-style-type:upper-roman" start="2">
<li value="2" class="p_Normal">Edit the <code><b>haproxy.cfg</b></code> configuration file:</li></ol>
<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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<td style="vertical-align:top; padding:0; border:none"><p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">###&nbsp;Web&nbsp;ELMA365&nbsp;###</span><br />
<span class="f_CodeExample">listen&nbsp;elma365_web</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;bind&nbsp;haproxy-server.your_domain:80</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;mode&nbsp;http</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;balance&nbsp;leastconn</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;no&nbsp;option&nbsp;http-use-htx</span><br />
<span class="f_CodeExample" style="color: #ffffff;">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="f_CodeExample">#&nbsp;http-use-htx&nbsp;is&nbsp;deprecated&nbsp;and&nbsp;ignored&nbsp;since&nbsp;Haproxy&nbsp;2.1</span><br />
<span class="f_CodeExample" style="color: #ffffff;">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="f_CodeExample">option&nbsp;forwardfor</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;option&nbsp;httpclose</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;server&nbsp;elma365-1&nbsp;elma365-1.your_domain:80&nbsp;check</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;server&nbsp;elma365-2&nbsp;elma365-2.your_domain:80&nbsp;check</span><br />
<span class="f_CodeExample">&nbsp;&nbsp;&nbsp;&nbsp;server&nbsp;elma365-3&nbsp;elma365-3.your_domain:80&nbsp;check</span><br />
<span class="f_CodeExample">###&nbsp;Web&nbsp;ELMA365&nbsp;###</span></p>
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<td style="vertical-align:top; padding:0; border:none"><p class="p_Normal" style="margin: 0 0 0 34px;">SSL can be enabled if OpenSSL support is embedded. 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>
<p class="p_Normal" style="margin: 0 0 0 34px;">&nbsp;<br />
If a directory name is used instead of a PEM file, all files found in that directory will be loaded in alphabetical order, except for files ending in <span style="font-weight: bold;">.issuer</span>, <span style="font-weight: bold;">.ocsp</span>, or <span style="font-weight: bold;">.sctl</span> (reserved solutions). </p>
<p class="p_Normal" style="margin: 0 0 0 34px;">&nbsp;<br />
In the <code><b>ca-file</b></code> parameter, specify the path to the PEM file containing the root certificate. Read more in the <span style="font-weight: bold;">Configuration Manual</span> for the HAProxy version used. Example for <a href="https://cbonte.github.io/haproxy-dconv/2.5/configuration.html#5.1-crt" target="_blank" class="weblink">HAProxy 2.5</a>:</p>
<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">### Web ELMA365 ###</span><br />
<span class="f_CodeExample">listen</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365_web</span><br />
<span class="f_CodeExample">  &nbsp; bind</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365.your_domain:443</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ssl</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">crt</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/elma365-server.your_domain.pem</span><br />
<span class="f_CodeExample">  &nbsp; mode</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">http</span><br />
<span class="f_CodeExample">  &nbsp; balance</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">leastconn</span><br />
<span class="f_CodeExample">  &nbsp; no</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">option</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">http-use-htx</span><br />
<span class="f_CodeExample" style="color: #ffffff;"> &nbsp; &nbsp; </span><span class="f_CodeExample"># http-use-htx is deprecated and ignored since Haproxy 2.1</span><br />
<span class="f_CodeExample" style="color: #ffffff;"> &nbsp; &nbsp; </span><span class="f_CodeExample">option</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">forwardfor</span><br />
<span class="f_CodeExample">  &nbsp; option httpclose</span><br />
<span class="f_CodeExample">  &nbsp; server</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-1</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-1.your_domain:443</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">check</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">inter</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">2s</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ssl</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">crt</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/elma365-server.your_domain.pem</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ca-file</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/rootCA_your_domain.pem</span><br />
<span class="f_CodeExample">  &nbsp; server</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-2</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-2.your_domain:443</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">check</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">inter</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">2s</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ssl</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">crt</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/elma365-server.your_domain.pem</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ca-file</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/rootCA_your_domain.pem</span><br />
<span class="f_CodeExample">  &nbsp; server</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-3</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">elma365-3.your_domain:443</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">check</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">inter</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">2s</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ssl</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">crt</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/elma365-server.your_domain.pem</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">ca-file</span><span class="f_CodeExample" style="color: #ffffff;"> </span><span class="f_CodeExample">/etc/haproxy/ssl/rootCA_your_domain.pem</span><br />
<span class="f_CodeExample">### Web ELMA365 ###</span></p>
</td>
</tr>
</table>
</div>
<ol style="list-style-type:upper-roman" start="3">
<li value="3" class="p_Normal">Restart HAProxy to apply changes:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid; margin: 0 0 0 34px;"><span class="f_CodeExample">sudo&nbsp;systemctl&nbsp;restart&nbsp;haproxy</span></p>
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