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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 / High availability HAProxy</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">High availability HAProxy</span></h1>
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<!-- Placeholder for topic body. -->
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<p class="p_Normal">HAProxy is a high availability and load balancing tool. In the BRIX system architecture, HAProxy is utilized to construct a fault-tolerant design when organizing a high-availability BRIX cluster. Depending on the architecture being set up, the necessary HAProxy configuration is chosen. This article outlines the installation of HAProxy and keepalived for Ubuntu Linux 20.04 and 22.04.</p>
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<p class="p_Normal">Installation consists of six steps:</p>
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<ol style="list-style-type:decimal">
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<li value="1" class="p_Normal"><a href="fail-safe-haproxy.html#prepare-nodes" class="topiclink">Prepare nodes (servers)</a>.</li><li value="2" class="p_Normal"><a href="fail-safe-haproxy.html#install-haproxy" class="topiclink">Install HAProxy</a>.</li><li value="3" class="p_Normal"><a href="fail-safe-haproxy.html#install-keepalived" class="topiclink">Install keepalived</a>.</li><li value="4" class="p_Normal"><a href="fail-safe-haproxy.html#set-up-keepalived" class="topiclink">Configure keepalived</a>.</li><li value="5" class="p_Normal"><a href="fail-safe-haproxy.html#set-up-haproxy-configuration" class="topiclink">Basic HAProxy configuration</a>.</li><li value="6" class="p_Normal"><a href="fail-safe-haproxy.html#add-configurations" class="topiclink">Add configurations for BRIX components balancing</a>.</li></ol>
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<h2 class="p_Heading2"><a id="prepare-nodes" class="hmanchor"></a><span class="f_Heading2">Step 1: Prepare nodes (servers)</span></h2>
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<ol style="list-style-type:upper-roman">
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<li value="1" class="p_Normal">Create two nodes (servers) with sequentially numbered host name:</li></ol>
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<ul style="list-style-type:disc">
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<li class="p_Normal"><span style="font-weight: bold;">haproxy-server1.your_domain</span>, <span style="font-weight: bold;">192.168.1.1</span>;</li></ul>
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<ul style="list-style-type:disc">
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<li class="p_Normal"><span style="font-weight: bold;">haproxy-server2.your_domain</span>, <span style="font-weight: bold;">192.168.1.2</span>.</li></ul>
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<ol style="list-style-type:upper-roman" start="2">
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<li value="2" class="p_Normal">Create mappings for host names in the DNS server and add the corresponding A-record for the virtual IP.</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">haproxy-server.your_domain <-> 192.168.1.13.</span></p>
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<p class="p_Normal">If not possible, add the necessary records in <code><b>/etc/hosts</b></code>.</p>
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<ol style="list-style-type:upper-roman" start="3">
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<li value="3" class="p_Normal">Enable <code><b>net.ipv4.ip_nonlocal_bind, net.ipv4.ip_forward</b></code> kernel parameters by executing the following commands:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo echo net.ipv4.ip_nonlocal_bind=1 >> /etc/sysctl.conf</span><br />
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<span class="f_CodeExample">sudo echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf</span><br />
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<span class="f_CodeExample">sudo sysctl -p</span></p>
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<h2 class="p_Heading2"><a id="install-haproxy" class="hmanchor"></a><span class="f_Heading2">Step 2: Install HAProxy</span></h2>
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<ol style="list-style-type:upper-roman">
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<li value="1" class="p_Normal">Install HAProxy on all nodes with the command:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo apt install haproxy -y</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">Start the HAProxy service on all nodes and add it to autostart:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo systemctl enable --now haproxy</span></p>
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<h2 class="p_Heading2"><a id="install-keepalived" class="hmanchor"></a><span class="f_Heading2">Step 3: Install keepalived</span></h2>
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<p class="p_Normal">Install keepalived on all nodes:</p>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo apt update</span><br />
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<span class="f_CodeExample">sudo apt install keepalived</span></p>
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<h2 class="p_Heading2"><a id="set-up-keepalived" class="hmanchor"></a><span class="f_Heading2">Step 4: Configure keepalived</span></h2>
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<ol style="list-style-type:upper-roman">
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<li value="1" class="p_Normal">Create the keepalived directory:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo mkdir -p /usr/libexec/keepalived</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">Create the <code><b>haproxy_check.sh</b></code> script file for monitoring the HAProxy health:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo nano /usr/libexec/keepalived/haproxy_check.sh</span></p>
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<ol style="list-style-type:upper-roman" start="3">
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<li value="3" class="p_Normal">Add the health check script to the <code><b>haproxy_check.sh</b></code> file:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">#!/bin/bash</span><br />
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<span class="f_CodeExample">/bin/kill -0 $(cat /</span><span class="f_CodeExample" style="font-weight: bold;">var</span><span class="f_CodeExample">/run/haproxy.pid)</span></p>
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<ol style="list-style-type:upper-roman" start="4">
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<li value="4" class="p_Normal">Create the keepalived configuration file on each node:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo nano /etc/keepalived/keepalived.conf</span></p>
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<ol style="list-style-type:upper-roman" start="5">
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<li value="5" class="p_Normal">Add an example keepalived configuration for the <span style="font-weight: bold;">haproxy-server1.your_domain</span> node to the keepalived.conf file <code><b>keepalived.conf</b></code>:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">global_defs {</span><br />
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<span class="f_CodeExample"> router_id haproxy-server1</span><br />
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<span class="f_CodeExample"> enable_script_security</span><br />
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<span class="f_CodeExample"> script_user root</span><br />
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<span class="f_CodeExample">}</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">vrrp_script haproxy_check {</span><br />
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<span class="f_CodeExample"> script "/usr/libexec/keepalived/haproxy_check.sh"</span><br />
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<span class="f_CodeExample"> interval 2</span><br />
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<span class="f_CodeExample"> weight 2</span><br />
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<span class="f_CodeExample">}</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">vrrp_instance VI_1 {</span><br />
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<span class="f_CodeExample"> </span><span class="f_CodeExample" style="font-weight: bold;">interface</span><span class="f_CodeExample"> eth0</span><br />
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<span class="f_CodeExample"> virtual_router_id 101</span><br />
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<span class="f_CodeExample"> priority 100</span><br />
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<span class="f_CodeExample"> advert_int 2</span><br />
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<span class="f_CodeExample"> state MASTER</span><br />
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<span class="f_CodeExample"> virtual_ipaddress {</span><br />
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<span class="f_CodeExample"> 192.168.1.13</span><br />
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<span class="f_CodeExample"> }</span><br />
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<span class="f_CodeExample"> track_script {</span><br />
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<span class="f_CodeExample"> haproxy_check</span><br />
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<span class="f_CodeExample"> }</span><br />
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<span class="f_CodeExample"> authentication {</span><br />
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<span class="f_CodeExample"> auth_type PASS</span><br />
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<span class="f_CodeExample"> auth_pass SecretPassword</span><br />
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<span class="f_CodeExample"> }</span><br />
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<span class="f_CodeExample">}</span></p>
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<ol style="list-style-type:upper-roman" start="6">
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<li value="6" class="p_Normal">Add an example keepalived configuration for the <span style="font-weight: bold;">haproxy-server2.your_domain</span> node to the keepalived.conf file <code><b>keepalived.conf</b></code>:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">global_defs {</span><br />
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<span class="f_CodeExample"> router_id haproxy-server2</span><br />
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<span class="f_CodeExample"> enable_script_security</span><br />
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<span class="f_CodeExample"> script_user root</span><br />
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<span class="f_CodeExample">}</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">vrrp_script haproxy_check {</span><br />
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<span class="f_CodeExample"> script "/usr/libexec/keepalived/haproxy_check.sh"</span><br />
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<span class="f_CodeExample"> interval 2</span><br />
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<span class="f_CodeExample"> weight 2</span><br />
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<span class="f_CodeExample">}</span><br />
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<span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">vrrp_instance VI_1 {</span><br />
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<span class="f_CodeExample"> </span><span class="f_CodeExample" style="font-weight: bold;">interface</span><span class="f_CodeExample"> eth0</span><br />
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<span class="f_CodeExample"> virtual_router_id 101</span><br />
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||||
<span class="f_CodeExample"> priority 90</span><br />
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<span class="f_CodeExample"> advert_int 2</span><br />
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||||
<span class="f_CodeExample"> state BACKUP</span><br />
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||||
<span class="f_CodeExample"> virtual_ipaddress {</span><br />
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||||
<span class="f_CodeExample"> 192.168.1.13</span><br />
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||||
<span class="f_CodeExample"> }</span><br />
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||||
<span class="f_CodeExample"> track_script {</span><br />
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||||
<span class="f_CodeExample"> haproxy_check</span><br />
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||||
<span class="f_CodeExample"> }</span><br />
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<span class="f_CodeExample"> authentication {</span><br />
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||||
<span class="f_CodeExample"> auth_type PASS</span><br />
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||||
<span class="f_CodeExample"> auth_pass SecretPassword</span><br />
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||||
<span class="f_CodeExample"> }</span><br />
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<span class="f_CodeExample">}</span></p>
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<p class="p_Normal">Where:</p>
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<ul style="list-style-type:disc">
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<li class="p_Normal"><code><b>router_id</b></code> is the router ID, a unique value on each node;</li><li class="p_Normal"><code><b>script_user</b></code> is the user running VRRP scripts;</li><li class="p_Normal"><code><b>interface</b></code> is the interface name to which keepalived will be attached;</li><li class="p_Normal"><code><b>virtual_router_id</b></code> is the virtual router ID, a shared value on all nodes;</li><li class="p_Normal"><code><b>priority</b></code> is the priority of nodes within the virtual route;</li><li class="p_Normal"><code><b>state</b></code> is the node role type in the virtual router;</li><li class="p_Normal"><code><b>virtual_ipaddress</b></code> is the virtual IP;</li><li class="p_Normal"><code><b>auth_type</b></code> is the authentication type in the virtual router;</li><li class="p_Normal"><code><b>auth_pass</b></code> is the password.</li></ul>
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<ol style="list-style-type:upper-roman" start="7">
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<li value="7" class="p_Normal">Restart keepalived on all nodes:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo systemctl restart keepalived</span></p>
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<h2 class="p_Heading2"><a id="set-up-haproxy-configuration" class="hmanchor"></a><span class="f_Heading2">Step 5: Basic HAProxy configuration</span></h2>
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<ol style="list-style-type:upper-roman">
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||||
<li value="1" class="p_Normal">Move the default configuration file:</li></ol>
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||||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo mv /etc/haproxy/haproxy.cfg{,.original}</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">Create and open a new configuration file for editing:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo nano /etc/haproxy/haproxy.cfg</span></p>
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<p class="p_Normal"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1')">Example of basic HAProxy configuration for the haproxy.cfg file</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 0;"><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">Basic configuration section describes the parameters of the HAProxy server operation: operating mode, timeouts, connection count, enabling the web interface, etc.</p>
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<p class="p_Normal">The example provides the necessary configuration for the HAProxy server operation. For more details on the used parameters, refer to the official <a href="http://docs.haproxy.org/" class="weblink">HAProxy Documentation</a>.</p>
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||||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">global</span><br />
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||||
<span class="f_CodeExample"> maxconn 100000</span><br />
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||||
<span class="f_CodeExample"> log /dev/log local0</span><br />
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||||
<span class="f_CodeExample"> log /dev/log local1 notice</span><br />
|
||||
<span class="f_CodeExample"> chroot /</span><span class="f_CodeExample" style="font-weight: bold;">var</span><span class="f_CodeExample">/lib/haproxy</span><br />
|
||||
<span class="f_CodeExample"> stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners</span><br />
|
||||
<span class="f_CodeExample"> stats timeout 30s</span><br />
|
||||
<span class="f_CodeExample"> user haproxy</span><br />
|
||||
<span class="f_CodeExample"> group haproxy</span><br />
|
||||
<span class="f_CodeExample"> daemon</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">defaults</span><br />
|
||||
<span class="f_CodeExample"> mode tcp</span><br />
|
||||
<span class="f_CodeExample"> log global</span><br />
|
||||
<span class="f_CodeExample"> retries 2</span><br />
|
||||
<span class="f_CodeExample"> timeout queue 5s</span><br />
|
||||
<span class="f_CodeExample"> timeout connect 5s</span><br />
|
||||
<span class="f_CodeExample"> timeout client 60m</span><br />
|
||||
<span class="f_CodeExample"> timeout server 60m</span><br />
|
||||
<span class="f_CodeExample"> timeout check 15s</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">listen stats</span><br />
|
||||
<span class="f_CodeExample"> mode http</span><br />
|
||||
<span class="f_CodeExample"> bind haproxy-server.your_domain:7000</span><br />
|
||||
<span class="f_CodeExample"> stats enable</span><br />
|
||||
<span class="f_CodeExample"> stats uri /</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### Web ELMA365 ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### Web ELMA365 ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### PostgreSQL ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### PostgreSQL ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### RabbitMQ ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### RabbitMQ ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### S3 MinIO ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### S3 MinIO ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### Docs Server ###</span><br />
|
||||
<span class="f_CodeExample"> </span><br />
|
||||
<span class="f_CodeExample">### Docs Server ###</span></p>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
</div>
|
||||
<ol style="list-style-type:upper-roman" start="3">
|
||||
<li value="3" class="p_Normal">Restart HAProxy:</li></ol>
|
||||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo systemctl restart haproxy</span></p>
|
||||
<h2 class="p_Heading2"><a id="add-configurations" class="hmanchor"></a><span class="f_Heading2">Step 6: Add configurations for BRIX components balancing</span></h2>
|
||||
<p class="p_Normal">BRIX component configurations are added to the <code><b>haproxy.cfg</b></code> file as needed. </p>
|
||||
<p class="p_Normal">Depending on the architecture being set up, add configurations:</p>
|
||||
<ul style="list-style-type:disc">
|
||||
<li class="p_Normal"><a href="haproxy-postgresql.html" class="topiclink">HAProxy for PostgreSQL</a>.</li><li class="p_Normal"><a href="haproxy-rabbitmq.html" class="topiclink">HAProxy for RabbitMQ</a>.</li><li class="p_Normal"><a href="haproxy-redis.html" class="topiclink">HAProxy for Redis Sentinel</a>.</li><li class="p_Normal"><a href="haproxy-s3-minio.html" class="topiclink">HAProxy for S3 Minio</a>.</li><li class="p_Normal"><a href="haproxy-web-elma365.html" class="topiclink">HAProxy for BRIX web</a>.</li><li class="p_Normal"><a href="haproxy-docs-server.html" class="topiclink">HAProxy for document server</a>.</li></ul>
|
||||
|
||||
<div class="bottom-nav">
|
||||
|
||||
<a id="prev-link" class="topic__navi_prev" href="haproxy-load-balance.html">
|
||||
<span class="bottom-nav__arrow bottom-nav__arrow--prev"></span> <span
|
||||
class="bottom-nav__link">haproxy-load-balance.html</span>
|
||||
</a>
|
||||
|
||||
|
||||
<a id="next-link" class="topic__navi_next" href="haproxy-postgresql.html">
|
||||
<span class="bottom-nav__link">haproxy-postgresql.html</span> <span
|
||||
class="bottom-nav__arrow bottom-nav__arrow--next"></span>
|
||||
</a>
|
||||
|
||||
</div>
|
||||
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|
||||
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|
||||
|
||||
</section>
|
||||
</div>
|
||||
<aside class="article__sidebar" style="display:none">
|
||||
<input type="checkbox" />
|
||||
<div class="article__arrow"></div>
|
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<div class="table-of-contents elma365-right" id="toc2Content">
|
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<h3 class="h3-toc">In this topic</h3>
|
||||
<nav id="toc2"></nav>
|
||||
</div>
|
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</aside>
|
||||
</div>
|
||||
</article>
|
||||
</main>
|
||||
<footer class="footer">
|
||||
<div class="footer-container">
|
||||
<div class="footer-mobile">
|
||||
|
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<ul class="footer-mobile__list"><li><a href="https://brix365.com/en/" target="_blank">BRIX</a></li><li><a href="https://tssdk.brix365.com/en/latest/" target="_blank">SDK</a></li><li><a href="https://api.brix365.com/en/" target="_blank">API</a></li></ul><ul class="footer-mobile__list"><li><a href="https://brix365.com/en/help/platform/get-trial.html">Platform</a></li><li><a href="https://brix365.com/en/help/ecm/ecm-functions.html">ECM</a></li><li><a href="https://brix365.com/en/help/service/service-functions.html">Service</a></li><li><a href="https://brix365.com/en/help/projects/projects-functions.html">Projects</a></li></ul>
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|
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|
||||
</div>
|
||||
<div class="footer-wrap">
|
||||
|
||||
<div><span class="mobile-question-popup">Send feedback</span><form method="POST" action class="question__popup question-xs" id="question__popup"><div class="question-wrap"><span class="close"></span><span class="title">Ask a question</span><label for="help_question" style="display: none;"></label><textarea name="help_question" id="help_question"></textarea><input type="submit" value="Send"></div></form><div class="hidden fade-in question-success-xs">Sent</div></div>
|
||||
|
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<div class="footer-flex-b">
|
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<span class="footer-copy">© 2025 BRIX</span>
|
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<ul class="footer-list">
|
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|
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<li class="footer-item">
|
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<a href="#" class="arrow-top" style="display: block;"></a>
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</li>
|
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|
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</ul>
|
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</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
</footer>
|
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<iframe name="hmnavigation" style="display:none!important"></iframe>
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<script src="./jquery-ui.js"></script>
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<script type="text/javascript">
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HMInitToggle('TOGGLE0186A1','hm.type','dropdown','hm.state','0');
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</html>
|
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Reference in New Issue
Block a user