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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; Databases &gt; <a href="discontinued-postgresql-support.html">Discontinued PostgreSQL support</a> / Updating PostgreSQL cluster 10 to 15</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">Updating PostgreSQL cluster 10 to 15</span></h1>
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<p class="p_Normal">When updating PostgreSQL to a major version, the pg_upgrade utility is used. This utility allows you to update the data stored in PostgreSQL data files to a newer version of PostgreSQL.</p>
<p class="p_Normal">Updating a PostgreSQL cluster consists of six steps:</p>
<ol style="list-style-type:decimal">
<li value="1" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#database-backup" class="topiclink">Database backup</a>.</li><li value="2" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#install-postgresql15" class="topiclink">Installation of PostgreSQL 15</a>.</li><li value="3" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#updating-data" class="topiclink">Updating data in the database directory</a>.</li><li value="4" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#starting-patroni-cluster" class="topiclink">Starting the Patroni cluster</a>.</li><li value="5" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#check-after-installing" class="topiclink">Post-installation check</a>.</li><li value="6" class="p_Normal"><a href="upgrading-postgresql-cluster-10-to-15.html#clear-old-data" class="topiclink">Cleaning up old data</a>.</li></ol>
<h2 class="p_Heading2"><a id="database-backup" class="hmanchor"></a><span class="f_Heading2">Step 1. Database backup</span></h2>
<p class="p_Normal">Before carrying out any actions related to the update, create a backup of the PostgreSQL data and configuration. Read more about how to do this in <a href="database-backup-and-recovery.html" class="topiclink">Backup and recover databases</a>.</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">начало&nbsp;внимание</span></p>
<p class="p_Normal">If there are third-party databases on the PostgreSQL server, backups of these databases should also be created.</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">конец&nbsp;внимание</span></p>
<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')">Backup of the PostgreSQL database without using the </a><span style="font-weight: bold;"><a class="dropdown-toggle" style="font-style: normal; font-weight: bold; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1')">elma365-backupper</a></span><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1')"> utility:</a></p>
<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;">
<tr>
<td style="vertical-align:top; padding:0; border:none"><p class="p_Normal">You can create an <code><b>elma365</b></code> database backup using <code><b>pg_dump</b></code> :</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;-u&nbsp;postgres&nbsp;pg_dump&nbsp;elma365&nbsp;-Fc&nbsp;&gt;&nbsp;path/to/elma365.bak&nbsp;</span></p>
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<h2 class="p_Heading2"><a id="install-postgresql15" class="hmanchor"></a><span class="f_Heading2">Step 2. Installation of PostgreSQL 15</span></h2>
<p class="p_Normal">Install PostgreSQL 15 on all nodes of the cluster where version 10 is installed:</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;apt&nbsp;install&nbsp;postgresql-15</span></p>
<h2 class="p_Heading2"><a id="updating-data" class="hmanchor"></a><span class="f_Heading2">Step 3. Updating data in the database directory</span></h2>
<ol style="list-style-type:upper-roman">
<li value="1" class="p_Normal" style="line-height: 1.20;">In the PostrgeSQL cluster, identify the Leader node::</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">patronictl&nbsp;-c&nbsp;/etc/patroni/config.yml&nbsp;list</span></p>
<ol style="list-style-type:upper-roman">
<li value="2" class="p_Normal" style="line-height: 1.20;">Stop Patroni on all PostrgeSQL cluster nodes::</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;systemctl&nbsp;stop&nbsp;patroni.service</span></p>
<ol style="list-style-type:upper-roman">
<li value="3" class="p_Normal" style="line-height: 1.20;">Stop PostgreSQL 10 and PostgreSQL 15 on all cluster nodes:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;systemctl&nbsp;stop&nbsp;postgresql@10&nbsp;postgresql@15</span></p>
<ol style="list-style-type:upper-roman">
<li value="4" class="p_Normal" style="line-height: 1.20;">Ensure that both PostgreSQL 10 and PostgreSQL 15 clusters are stopped:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">pg_lsclusters</span></p>
<ol style="list-style-type:upper-roman">
<li value="5" class="p_Normal" style="line-height: 1.20;">On the Leader node, perform a compatibility check of database configurations:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;-iu&nbsp;postgres&nbsp;/usr/lib/postgresql/15/bin/pg_upgrade&nbsp;\</span><br />
<span class="f_CodeExample">-o&nbsp;&quot;-c&nbsp;config_file=/etc/postgresql/10/main/postgresql.conf&quot;\</span><br />
<span class="f_CodeExample">-O&nbsp;&quot;-c&nbsp;config_file=/etc/postgresql/15/main/postgresql.conf&quot;&nbsp;\</span><br />
<span class="f_CodeExample">--old-datadir=/var/lib/postgresql/10/main/&nbsp;\</span><br />
<span class="f_CodeExample">--new-datadir=/var/lib/postgresql/15/main/&nbsp;\</span><br />
<span class="f_CodeExample">--old-bindir=/usr/lib/postgresql/10/bin&nbsp;\</span><br />
<span class="f_CodeExample">--new-bindir=/usr/lib/postgresql/15/bin&nbsp;--check</span></p>
<p class="p_Normal" style="line-height: 1.20;">where:</p>
<ul style="list-style-type:disc">
<li class="p_Normal"><code><b>/usr/lib/postgresql/10/bin</b></code> and <code><b>/usr/lib/postgresql/15/bin</b></code> are the paths to the binary files of PostgreSQL versions 10 and 15;</li><li class="p_Normal"><code><b>/var/lib/postgresql/10/main</b></code> and <code><b>/var/lib/postgresql/15/main</b></code> are the paths to the data directories.</li></ul>
<ol style="list-style-type:upper-roman">
<li value="6" class="p_Normal" style="line-height: 1.20;">On the Leader node, transfer data from PostgreSQL 10 to PostgreSQL 15:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;-iu&nbsp;postgres&nbsp;/usr/lib/postgresql/15/bin/pg_upgrade&nbsp;\</span><br />
<span class="f_CodeExample">-o&nbsp;&quot;-c&nbsp;config_file=/etc/postgresql/10/main/postgresql.conf&quot;&nbsp;\</span><br />
<span class="f_CodeExample">-O&nbsp;&quot;-c&nbsp;config_file=/etc/postgresql/15/main/postgresql.conf&quot;&nbsp;\</span><br />
<span class="f_CodeExample">--old-datadir=/var/lib/postgresql/10/main/&nbsp;\</span><br />
<span class="f_CodeExample">--new-datadir=/var/lib/postgresql/15/main/&nbsp;\</span><br />
<span class="f_CodeExample">--old-bindir=/usr/lib/postgresql/10/bin&nbsp;\</span><br />
<span class="f_CodeExample">--new-bindir=/usr/lib/postgresql/15/bin</span></p>
<p class="p_Normal">where:</p>
<ul style="list-style-type:disc">
<li class="p_Normal"><code><b>/usr/lib/postgresql/10/bin</b></code> and <code><b>/usr/lib/postgresql/15/bin</b></code> are the paths to the binary files of PostgreSQL versions 10 and 15;</li><li class="p_Normal"><code><b>/var/lib/postgresql/10/main</b></code> and <code><b>/var/lib/postgresql/15/main</b></code> are the paths to the data directories.</li></ul>
<h2 class="p_Heading2"><a id="starting-patroni-cluster" class="hmanchor"></a><span class="f_Heading2">Step 4. Starting the Patroni cluster</span></h2>
<ol style="list-style-type:upper-roman">
<li value="1" class="p_Normal" style="line-height: 1.20;">Open the Patroni configuration file on the path to PostgreSQL 15:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;nano&nbsp;/etc/patroni/config.yml</span></p>
<ol style="list-style-type:upper-roman">
<li value="2" class="p_Normal" style="line-height: 1.20;">Replace parameters <code><b>data_dir</b></code>, <code><b>bin_dir</b></code> and <code><b>config_dir</b></code> on each PostgreSQL cluster node, for example:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">...</span><br />
<span class="f_CodeExample">data_dir:&nbsp;/var/lib/postgresql/15/main</span><br />
<span class="f_CodeExample">bin_dir:&nbsp;/usr/lib/postgresql/15/bin</span><br />
<span class="f_CodeExample">config_dir:&nbsp;/etc/postgresql/15/main</span><br />
<span class="f_CodeExample">...</span></p>
<ol style="list-style-type:upper-roman">
<li value="3" class="p_Normal">Get the name of the PostgreSQL 10 cluster:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;cat&nbsp;/etc/patroni/config.yml&nbsp;|&nbsp;grep&nbsp;&quot;scope&quot;&nbsp;|&nbsp;awk&nbsp;'{&nbsp;print&nbsp;$2&nbsp;}'</span></p>
<ol style="list-style-type:upper-roman">
<li value="4" class="p_Normal">On the Leader node in Patroni, remove the PostgreSQL 10 cluster:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">patronictl&nbsp;-c&nbsp;/etc/patroni/config.yml&nbsp;remove&nbsp;postgres-cluster</span></p>
<p class="p_Normal">where:</p>
<ul style="list-style-type:disc">
<li class="p_Normal"><code><b>postgres-cluster</b></code> is the name of the PostgreSQL 10 cluster obtained in the previous step.</li></ul>
<ol style="list-style-type:upper-roman">
<li value="5" class="p_Normal">Start Patroni on the Leader node:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;systemctl&nbsp;start&nbsp;patroni.service</span></p>
<ol style="list-style-type:upper-roman">
<li value="6" class="p_Normal">On Replica nodes, delete the PostgreSQL 15 data directory:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;rm&nbsp;-rf&nbsp;/var/lib/postgresql/15/main</span></p>
<ol style="list-style-type:upper-roman">
<li value="7" class="p_Normal">On Replica nodes, start Patroni:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;systemctl&nbsp;start&nbsp;patroni.service</span></p>
<h2 class="p_Heading2"><a id="check-after-installing" class="hmanchor"></a><span class="f_Heading2">Step 5. Post-installation check</span></h2>
<ol style="list-style-type:upper-roman">
<li value="1" class="p_Normal">Check the status of the cluster:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">patronictl&nbsp;-c&nbsp;/etc/patroni/config.yml&nbsp;list</span></p>
<ol style="list-style-type:upper-roman">
<li value="2" class="p_Normal" style="line-height: 1.20;">Ensure that PostgreSQL 15 is running correctly and the data is accessible. </li><li value="3" class="p_Normal" style="line-height: 1.20;">For database optimization, execute the command on the Leader node:</li></ol>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;-u&nbsp;postgres&nbsp;/usr/lib/postgresql/15/bin/vacuumdb&nbsp;--all&nbsp;--analyze-in-stages</span></p>
<h2 class="p_Heading2"><a id="clear-old-data" class="hmanchor"></a><span class="f_Heading2">Step 6. Cleaning up old data</span></h2>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">начало&nbsp;внимание</span></p>
<p class="p_Normal">Before starting the cleaning process, ensure you have a backup of the data and configuration.</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">конец&nbsp;внимание</span></p>
<p class="p_Normal">If necessary, after successful updating and checking PostgreSQL 15, you can clean up old data:</p>
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">sudo&nbsp;-u&nbsp;postgres&nbsp;./delete_old_cluster.sh</span></p>
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