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<a href="https://gitea.bnkops.com/admin/changemaker.lite/src/branch/main/mkdocs/docs/services/postgresql.md" title="Edit this page" class="md-content__button md-icon" rel="edit">
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<h1 id="postgresql-database">PostgreSQL Database<a class="headerlink" href="#postgresql-database" title="Permanent link">&para;</a></h1>
<p>Reliable database backend for applications.</p>
<h2 id="overview">Overview<a class="headerlink" href="#overview" title="Permanent link">&para;</a></h2>
<p>PostgreSQL is a powerful, open-source relational database system. In Changemaker Lite, it serves as the backend database for Listmonk and can be used by other applications requiring persistent data storage.</p>
<h2 id="features">Features<a class="headerlink" href="#features" title="Permanent link">&para;</a></h2>
<ul>
<li>ACID compliance</li>
<li>Advanced SQL features</li>
<li>JSON/JSONB support</li>
<li>Full-text search</li>
<li>Extensibility</li>
<li>High performance</li>
<li>Reliability and data integrity</li>
</ul>
<h2 id="access">Access<a class="headerlink" href="#access" title="Permanent link">&para;</a></h2>
<ul>
<li><strong>Default Port</strong>: 5432</li>
<li><strong>Host</strong>: <code>listmonk-db</code> (internal container name)</li>
<li><strong>Database</strong>: Set via <code>POSTGRES_DB</code> environment variable</li>
<li><strong>Username</strong>: Set via <code>POSTGRES_USER</code> environment variable</li>
<li><strong>Password</strong>: Set via <code>POSTGRES_PASSWORD</code> environment variable</li>
</ul>
<h2 id="configuration">Configuration<a class="headerlink" href="#configuration" title="Permanent link">&para;</a></h2>
<h3 id="environment-variables">Environment Variables<a class="headerlink" href="#environment-variables" title="Permanent link">&para;</a></h3>
<ul>
<li><code>POSTGRES_USER</code>: Database username</li>
<li><code>POSTGRES_PASSWORD</code>: Database password </li>
<li><code>POSTGRES_DB</code>: Database name</li>
</ul>
<h3 id="health-checks">Health Checks<a class="headerlink" href="#health-checks" title="Permanent link">&para;</a></h3>
<p>The PostgreSQL container includes health checks to ensure the database is ready before dependent services start.</p>
<h3 id="data-persistence">Data Persistence<a class="headerlink" href="#data-persistence" title="Permanent link">&para;</a></h3>
<p>Database data is stored in a Docker volume (<code>listmonk-data</code>) to ensure persistence across container restarts.</p>
<h2 id="connecting-to-the-database">Connecting to the Database<a class="headerlink" href="#connecting-to-the-database" title="Permanent link">&para;</a></h2>
<h3 id="from-host-machine">From Host Machine<a class="headerlink" href="#from-host-machine" title="Permanent link">&para;</a></h3>
<p>You can connect to PostgreSQL from your host machine using:</p>
<div class="language-bash highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a>psql<span class="w"> </span>-h<span class="w"> </span>localhost<span class="w"> </span>-p<span class="w"> </span><span class="m">5432</span><span class="w"> </span>-U<span class="w"> </span><span class="o">[</span>username<span class="o">]</span><span class="w"> </span>-d<span class="w"> </span><span class="o">[</span>database<span class="o">]</span>
</span></code></pre></div>
<h3 id="from-other-containers">From Other Containers<a class="headerlink" href="#from-other-containers" title="Permanent link">&para;</a></h3>
<p>Other containers can connect using the internal hostname <code>listmonk-db</code> on port 5432.</p>
<h2 id="backup-and-restore">Backup and Restore<a class="headerlink" href="#backup-and-restore" title="Permanent link">&para;</a></h2>
<h3 id="backup">Backup<a class="headerlink" href="#backup" title="Permanent link">&para;</a></h3>
<div class="language-bash highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a>docker<span class="w"> </span><span class="nb">exec</span><span class="w"> </span>listmonk-db<span class="w"> </span>pg_dump<span class="w"> </span>-U<span class="w"> </span><span class="o">[</span>username<span class="o">]</span><span class="w"> </span><span class="o">[</span>database<span class="o">]</span><span class="w"> </span>&gt;<span class="w"> </span>backup.sql
</span></code></pre></div>
<h3 id="restore">Restore<a class="headerlink" href="#restore" title="Permanent link">&para;</a></h3>
<div class="language-bash highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a>docker<span class="w"> </span><span class="nb">exec</span><span class="w"> </span>-i<span class="w"> </span>listmonk-db<span class="w"> </span>psql<span class="w"> </span>-U<span class="w"> </span><span class="o">[</span>username<span class="o">]</span><span class="w"> </span><span class="o">[</span>database<span class="o">]</span><span class="w"> </span>&lt;<span class="w"> </span>backup.sql
</span></code></pre></div>
<h2 id="monitoring">Monitoring<a class="headerlink" href="#monitoring" title="Permanent link">&para;</a></h2>
<p>Monitor database health and performance through:
- Container logs: <code>docker logs listmonk-db</code>
- Database metrics and queries
- Connection monitoring</p>
<h2 id="security-considerations">Security Considerations<a class="headerlink" href="#security-considerations" title="Permanent link">&para;</a></h2>
<ul>
<li>Use strong passwords</li>
<li>Regularly update PostgreSQL version</li>
<li>Monitor access logs</li>
<li>Implement regular backups</li>
<li>Consider network isolation</li>
</ul>
<h2 id="official-documentation">Official Documentation<a class="headerlink" href="#official-documentation" title="Permanent link">&para;</a></h2>
<p>For comprehensive PostgreSQL documentation:
- <a href="https://www.postgresql.org/docs/">PostgreSQL Documentation</a>
- <a href="https://hub.docker.com/_/postgres">Docker PostgreSQL Image</a></p>
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