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<title data-rh="true">Configure an external PostgreSQL database | Langflow Documentation</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.langflow.org/Configuration/configuration-custom-database"><meta data-rh="true" property="og:locale" content="en"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Configure an external PostgreSQL database | Langflow Documentation"><meta data-rh="true" name="description" content="Langflow's default database is SQLite, but you can configure Langflow to use PostgreSQL instead."><meta data-rh="true" property="og:description" content="Langflow's default database is SQLite, but you can configure Langflow to use PostgreSQL instead."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.langflow.org/Configuration/configuration-custom-database"><link data-rh="true" rel="alternate" href="https://docs.langflow.org/Configuration/configuration-custom-database" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.langflow.org/Configuration/configuration-custom-database" hreflang="x-default"><link rel="preconnect" href="https://www.google-analytics.com">
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ms-px-[8px] ms-text-xs ms-text-gray-400 ms-transition-all disabled:ms-bg-opacity-10"><span>CTRL</span><span>K</span></div></button><div></div></div></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0"><div class="docsWrapper_hBAB"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docRoot_UBD9"><main class="docMainContainer_TBSr docMainContainerEnhanced_lQrH"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Configure an external PostgreSQL database</h1></header><style>[data-ch-theme="github-dark"] { --ch-t-colorScheme: dark;--ch-t-foreground: #c9d1d9;--ch-t-background: #0d1117;--ch-t-lighter-inlineBackground: #0d1117e6;--ch-t-editor-background: #0d1117;--ch-t-editor-foreground: #c9d1d9;--ch-t-editor-lineHighlightBackground: #6e76811a;--ch-t-editor-rangeHighlightBackground: #ffffff0b;--ch-t-editor-infoForeground: #3794FF;--ch-t-editor-selectionBackground: #264F78;--ch-t-focusBorder: #1f6feb;--ch-t-tab-activeBackground: #0d1117;--ch-t-tab-activeForeground: #c9d1d9;--ch-t-tab-inactiveBackground: #010409;--ch-t-tab-inactiveForeground: #8b949e;--ch-t-tab-border: #30363d;--ch-t-tab-activeBorder: #0d1117;--ch-t-editorGroup-border: #30363d;--ch-t-editorGroupHeader-tabsBackground: #010409;--ch-t-editorLineNumber-foreground: #6e7681;--ch-t-input-background: #0d1117;--ch-t-input-foreground: #c9d1d9;--ch-t-input-border: #30363d;--ch-t-icon-foreground: #8b949e;--ch-t-sideBar-background: #010409;--ch-t-sideBar-foreground: 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<p>Langflow's default database is <a href="https://www.sqlite.org/docs.html" target="_blank" rel="noopener noreferrer">SQLite</a>, but you can configure Langflow to use PostgreSQL instead.</p>
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<p>This guide will walk you through the process of setting up an external database for Langflow by replacing the default SQLite connection string <code>sqlite:///./langflow.db</code> with PostgreSQL.</p>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="prerequisite">Prerequisite<a href="#prerequisite" class="hash-link" aria-label="Direct link to Prerequisite" title="Direct link to Prerequisite"></a></h2>
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<ul>
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<li>A <a href="https://www.pgadmin.org/download/" target="_blank" rel="noopener noreferrer">PostgreSQL</a> database</li>
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</ul>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="connect-langflow-to-postgresql">Connect Langflow to PostgreSQL<a href="#connect-langflow-to-postgresql" class="hash-link" aria-label="Direct link to Connect Langflow to PostgreSQL" title="Direct link to Connect Langflow to PostgreSQL"></a></h2>
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<p>To connect Langflow to PostgreSQL, follow these steps.</p>
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<ol>
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<li>Find your PostgreSQL database's connection string.
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It looks like <code>postgresql://user:password@host:port/dbname</code>.
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For example, if you started PostgreSQL with this Docker command:</li>
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</ol>
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<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>docker run --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -d -p 5432:5432 postgres</span></div></div><br></code></div></div>
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<p>Your connection string would be <code>postgresql://some-postgres:mysecretpassword@localhost:5432/postgres</code>.</p>
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<ol start="2">
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<li>Create a <code>.env</code> file for configuring Langflow.</li>
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</ol>
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<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>touch .env</span></div></div><br></code></div></div>
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<ol start="3">
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<li>To set the database URL environment variable, add it to your <code>.env</code> file:</li>
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</ol>
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<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>LANGFLOW_DATABASE_URL="postgresql://user:password@localhost:5432/dbname"</span></div></div><br></code></div></div>
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<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_BuS1"><p>The Langflow project includes a <a href="https://github.com/langflow-ai/langflow/blob/main/.env.example" target="_blank" rel="noopener noreferrer"><code>.env.example</code></a> file to help you get started.
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You can copy the contents of this file into your own <code>.env</code> file and replace the example values with your own preferred settings.
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Replace the value for <code>LANGFLOW_DATABASE_URL</code> with your PostgreSQL connection string.</p></div></div>
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<ol start="4">
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<li>Run Langflow with the <code>.env</code> file:</li>
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</ol>
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<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>langflow run --env-file .env</span></div></div><br></code></div></div>
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<ol start="5">
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<li>In Langflow, create traffic by running a flow.</li>
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<li>Inspect your PostgreSQL deployment's tables and activity.
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You will see new tables and traffic created.</li>
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</ol>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="example-langflow-and-postgresql-docker-composeyml">Example Langflow and PostgreSQL docker-compose.yml<a href="#example-langflow-and-postgresql-docker-composeyml" class="hash-link" aria-label="Direct link to Example Langflow and PostgreSQL docker-compose.yml" title="Direct link to Example Langflow and PostgreSQL docker-compose.yml"></a></h2>
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<p>The Langflow project includes a <a href="https://github.com/langflow-ai/langflow/blob/main/docker_example/docker-compose.yml" target="_blank" rel="noopener noreferrer"><code>docker-compose.yml</code></a> file for quick deployment with PostgreSQL.</p>
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<p>This configuration launches Langflow and PostgreSQL containers, with Langflow pre-configured to use the PostgreSQL database. Customize the database credentials as needed.</p>
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<p>To start the services, navigate to the <code>/docker_example</code> directory, and then run <code>docker-compose up</code>.</p>
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<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span>services:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> langflow:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> image: langflow-ai/langflow:latest</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> environment:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> - LANGFLOW_DATABASE_URL=postgresql://user:password@postgres:5432/langflow</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> depends_on:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> - postgres</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> postgres:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> image: postgres:15</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> environment:</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> - POSTGRES_USER=user</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> - POSTGRES_PASSWORD=password</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> - POSTGRES_DB=langflow</span></div></div><br></code></div></div></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#prerequisite" class="table-of-contents__link toc-highlight">Prerequisite</a></li><li><a href="#connect-langflow-to-postgresql" class="table-of-contents__link toc-highlight">Connect Langflow to PostgreSQL</a></li><li><a href="#example-langflow-and-postgresql-docker-composeyml" class="table-of-contents__link toc-highlight">Example Langflow and PostgreSQL docker-compose.yml</a></li></ul></div></div></div></div></main></div></div></div><div id="ms-floating-button" class="ms-fixed ms-bottom-4 ms-right-8 ms-z-[100] ms-flex ms-flex-col ms-items-end hover:ms-cursor-pointer"><div class="ms-relative ms-mb-4"><div style="background-color:#f6f6f6" class="ms-absolute -ms-bottom-1 ms-right-6 -ms-z-10 ms-h-4 ms-w-4 ms-rotate-45"></div><div style="background-color:#f6f6f6" class="ms-z-10 ms-flex ms-items-center ms-justify-center ms-rounded-lg ms-px-3 ms-py-2"><p style="color:#000000;margin:0" class="ms-text-sm">Hi, how can I help you?</p></div></div><div style="background-color:#f6f6f6" class="ms-flex ms-h-16 ms-w-16 ms-flex-col ms-items-center ms-justify-center ms-self-end ms-rounded-full ms-p-2 ms-transition"><div class="ms-rotate-0 ms-flex ms-h-full ms-w-full ms-transform ms-cursor-pointer ms-items-center ms-justify-center ms-rounded-full ms-transition-all ms-delay-75 ms-duration-100 ms-ease-in-out"><div style="color:#000000;font-size:22px;width:48px;height:48px;margin:0px;padding:0px;display:flex;align-items:center;justify-content:center;text-align:center"><img src="/img/langflow-icon-black-transparent.svg" srcdark="" style="width:40px"></div></div></div><div></div></div></div>
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