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| <div class="section" id="managing-connections"> |
| <h1>Managing Connections<a class="headerlink" href="#managing-connections" title="Permalink to this headline">¶</a></h1> |
| <p>Airflow needs to know how to connect to your environment. Information |
| such as hostname, port, login and passwords to other systems and services is |
| handled in the <code class="docutils literal notranslate"><span class="pre">Admin->Connections</span></code> section of the UI. The pipeline code you |
| will author will reference the ‘conn_id’ of the Connection objects.</p> |
| <img alt="../../_images/connections.png" src="../../_images/connections.png" /> |
| <p>Connections can be created and managed using either the UI or environment |
| variables.</p> |
| <p>See the <a class="reference internal" href="../../concepts.html#concepts-connections"><span class="std std-ref">Connections Concepts</span></a> documentation for |
| more information.</p> |
| <div class="section" id="creating-a-connection-with-the-ui"> |
| <h2>Creating a Connection with the UI<a class="headerlink" href="#creating-a-connection-with-the-ui" title="Permalink to this headline">¶</a></h2> |
| <p>Open the <code class="docutils literal notranslate"><span class="pre">Admin->Connections</span></code> section of the UI. Click the <code class="docutils literal notranslate"><span class="pre">Create</span></code> link |
| to create a new connection.</p> |
| <img alt="../../_images/connection_create.png" src="../../_images/connection_create.png" /> |
| <ol class="arabic simple"> |
| <li><p>Fill in the <code class="docutils literal notranslate"><span class="pre">Conn</span> <span class="pre">Id</span></code> field with the desired connection ID. It is |
| recommended that you use lower-case characters and separate words with |
| underscores.</p></li> |
| <li><p>Choose the connection type with the <code class="docutils literal notranslate"><span class="pre">Conn</span> <span class="pre">Type</span></code> field.</p></li> |
| <li><p>Fill in the remaining fields. See |
| <a class="reference internal" href="#manage-connections-connection-types"><span class="std std-ref">Connection Types</span></a> for a description of the fields |
| belonging to the different connection types.</p></li> |
| <li><p>Click the <code class="docutils literal notranslate"><span class="pre">Save</span></code> button to create the connection.</p></li> |
| </ol> |
| </div> |
| <div class="section" id="editing-a-connection-with-the-ui"> |
| <h2>Editing a Connection with the UI<a class="headerlink" href="#editing-a-connection-with-the-ui" title="Permalink to this headline">¶</a></h2> |
| <p>Open the <code class="docutils literal notranslate"><span class="pre">Admin->Connections</span></code> section of the UI. Click the pencil icon next |
| to the connection you wish to edit in the connection list.</p> |
| <img alt="../../_images/connection_edit.png" src="../../_images/connection_edit.png" /> |
| <p>Modify the connection properties and click the <code class="docutils literal notranslate"><span class="pre">Save</span></code> button to save your |
| changes.</p> |
| </div> |
| <div class="section" id="creating-a-connection-with-environment-variables"> |
| <h2>Creating a Connection with Environment Variables<a class="headerlink" href="#creating-a-connection-with-environment-variables" title="Permalink to this headline">¶</a></h2> |
| <p>Connections in Airflow pipelines can be created using environment variables. |
| The environment variable needs to have a prefix of <code class="docutils literal notranslate"><span class="pre">AIRFLOW_CONN_</span></code> for |
| Airflow with the value in a URI format to use the connection properly.</p> |
| <p>When referencing the connection in the Airflow pipeline, the <code class="docutils literal notranslate"><span class="pre">conn_id</span></code> |
| should be the name of the variable without the prefix. For example, if the |
| <code class="docutils literal notranslate"><span class="pre">conn_id</span></code> is named <code class="docutils literal notranslate"><span class="pre">postgres_master</span></code> the environment variable should be |
| named <code class="docutils literal notranslate"><span class="pre">AIRFLOW_CONN_POSTGRES_MASTER</span></code> (note that the environment variable |
| must be all uppercase).</p> |
| <p>Airflow assumes the value returned from the environment variable to be in a URI |
| format (e.g.``postgres://user:password@localhost:5432/master`` or |
| <code class="docutils literal notranslate"><span class="pre">s3://accesskey:secretkey@S3</span></code>). The underscore character is not allowed |
| in the scheme part of URI, so it must be changed to a hyphen character |
| (e.g. <cite>google-compute-platform</cite> if <cite>conn_type</cite> is <cite>google_compute_platform</cite>). |
| Query parameters are parsed to one-dimensional dict and then used to fill extra.</p> |
| </div> |
| <div class="section" id="connection-types"> |
| <span id="manage-connections-connection-types"></span><h2>Connection Types<a class="headerlink" href="#connection-types" title="Permalink to this headline">¶</a></h2> |
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