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| <div class="section" id="installation"> |
| <h1>Installation<a class="headerlink" href="#installation" title="Permalink to this headline">¶</a></h1> |
| <div class="contents local topic" id="contents"> |
| <ul class="simple"> |
| <li><p><a class="reference internal" href="#getting-airflow" id="id1">Getting Airflow</a></p></li> |
| <li><p><a class="reference internal" href="#requirements" id="id2">Requirements</a></p></li> |
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| <ul> |
| <li><p><a class="reference internal" href="#symbol-not-found-py-getargcargv" id="id8"><code class="docutils literal notranslate"><span class="pre">Symbol</span> <span class="pre">not</span> <span class="pre">found:</span> <span class="pre">_Py_GetArgcArgv</span></code></a></p></li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="section" id="getting-airflow"> |
| <h2><a class="toc-backref" href="#id1">Getting Airflow</a><a class="headerlink" href="#getting-airflow" title="Permalink to this headline">¶</a></h2> |
| <p>Airflow is published as <code class="docutils literal notranslate"><span class="pre">apache-airflow</span></code> package in PyPI. Installing it however might be sometimes tricky |
| because Airflow is a bit of both a library and application. Libraries usually keep their dependencies open and |
| applications usually pin them, but we should do neither and both at the same time. We decided to keep |
| our dependencies as open as possible (in <code class="docutils literal notranslate"><span class="pre">setup.cfg</span></code> and <code class="docutils literal notranslate"><span class="pre">setup.py</span></code>) so users can install different |
| version of libraries if needed. This means that from time to time plain <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">apache-airflow</span></code> will |
| not work or will produce unusable Airflow installation.</p> |
| <p>In order to have repeatable installation, however, starting from <strong>Airflow 1.10.10</strong> and updated in |
| <strong>Airflow 1.10.13</strong> we also keep a set of "known-to-be-working" constraint files in the |
| <code class="docutils literal notranslate"><span class="pre">constraints-master</span></code> and <code class="docutils literal notranslate"><span class="pre">constraints-1-10</span></code> orphan branches. |
| Those "known-to-be-working" constraints are per major/minor python version. You can use them as constraint |
| files when installing Airflow from PyPI. Note that you have to specify correct Airflow version |
| and python versions in the URL.</p> |
| <blockquote> |
| <div><p><strong>Prerequisites</strong></p> |
| <p>On Debian based Linux OS:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo apt-get update |
| sudo apt-get install build-essential |
| </pre></div> |
| </div> |
| </div></blockquote> |
| <ol class="arabic simple"> |
| <li><p>Installing just Airflow</p></li> |
| </ol> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>On November 2020, new version of PIP (20.3) has been released with a new, 2020 resolver. This resolver |
| does not yet work with Apache Airflow and might leads to errors in installation - depends on your choice |
| of extras. In order to install Airflow you need to either downgrade pip to version 20.2.4 |
| <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">upgrade</span> <span class="pre">--pip==20.2.4</span></code> or, in case you use Pip 20.3, you need to add option |
| <code class="docutils literal notranslate"><span class="pre">--use-deprecated</span> <span class="pre">legacy-resolver</span></code> to your pip install command.</p> |
| </div> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">AIRFLOW_VERSION</span><span class="o">=</span><span class="m">1</span>.10.14 |
| <span class="nv">PYTHON_VERSION</span><span class="o">=</span><span class="s2">"</span><span class="k">$(</span>python --version <span class="p">|</span> cut -d <span class="s2">" "</span> -f <span class="m">2</span> <span class="p">|</span> cut -d <span class="s2">"."</span> -f <span class="m">1</span>-2<span class="k">)</span><span class="s2">"</span> |
| <span class="c1"># For example: 3.6</span> |
| <span class="nv">CONSTRAINT_URL</span><span class="o">=</span><span class="s2">"https://raw.githubusercontent.com/apache/airflow/constraints-</span><span class="si">${</span><span class="nv">AIRFLOW_VERSION</span><span class="si">}</span><span class="s2">/constraints-</span><span class="si">${</span><span class="nv">PYTHON_VERSION</span><span class="si">}</span><span class="s2">.txt"</span> |
| <span class="c1"># For example: https://raw.githubusercontent.com/apache/airflow/constraints-1.10.14/constraints-3.6.txt</span> |
| pip install <span class="s2">"apache-airflow==</span><span class="si">${</span><span class="nv">AIRFLOW_VERSION</span><span class="si">}</span><span class="s2">"</span> --constraint <span class="s2">"</span><span class="si">${</span><span class="nv">CONSTRAINT_URL</span><span class="si">}</span><span class="s2">"</span> |
| |
| Please note that with respect to Python <span class="m">3</span> support, Airflow <span class="m">1</span>.10.14 has been |
| tested with Python <span class="m">3</span>.6, <span class="m">3</span>.7, and <span class="m">3</span>.8, but does not yet support Python <span class="m">3</span>.9. |
| </pre></div> |
| </div> |
| <ol class="arabic simple" start="2"> |
| <li><p>Installing with extras (for example postgres, google)</p></li> |
| </ol> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>On November 2020, new version of PIP (20.3) has been released with a new, 2020 resolver. This resolver |
| does not yet work with Apache Airflow and might leads to errors in installation - depends on your choice |
| of extras. In order to install Airflow you need to either downgrade pip to version 20.2.4 |
| <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">upgrade</span> <span class="pre">--pip==20.2.4</span></code> or, in case you use Pip 20.3, you need to add option |
| <code class="docutils literal notranslate"><span class="pre">--use-deprecated</span> <span class="pre">legacy-resolver</span></code> to your pip install command.</p> |
| </div> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">AIRFLOW_VERSION</span><span class="o">=</span><span class="m">1</span>.10.14 |
| <span class="nv">PYTHON_VERSION</span><span class="o">=</span><span class="s2">"</span><span class="k">$(</span>python --version <span class="p">|</span> cut -d <span class="s2">" "</span> -f <span class="m">2</span> <span class="p">|</span> cut -d <span class="s2">"."</span> -f <span class="m">1</span>-2<span class="k">)</span><span class="s2">"</span> |
| <span class="nv">CONSTRAINT_URL</span><span class="o">=</span><span class="s2">"https://raw.githubusercontent.com/apache/airflow/constraints-</span><span class="si">${</span><span class="nv">AIRFLOW_VERSION</span><span class="si">}</span><span class="s2">/constraints-</span><span class="si">${</span><span class="nv">PYTHON_VERSION</span><span class="si">}</span><span class="s2">.txt"</span> |
| pip install <span class="s2">"apache-airflow[postgres,google]==</span><span class="si">${</span><span class="nv">AIRFLOW_VERSION</span><span class="si">}</span><span class="s2">"</span> --constraint <span class="s2">"</span><span class="si">${</span><span class="nv">CONSTRAINT_URL</span><span class="si">}</span><span class="s2">"</span> |
| </pre></div> |
| </div> |
| <p>Most of the extras are linked to a corresponding providers package. For example "amazon" extra |
| has a corresponding <code class="docutils literal notranslate"><span class="pre">apache-airflow-providers-amazon</span></code> providers package to be installed. When you install |
| Airflow with such extras, the necessary provider packages are installed automatically (latest versions from |
| PyPI for those packages). However you can freely upgrade and install provider packages independently from |
| the main Airflow installation.</p> |
| </div> |
| <div class="section" id="requirements"> |
| <h2><a class="toc-backref" href="#id2">Requirements</a><a class="headerlink" href="#requirements" title="Permalink to this headline">¶</a></h2> |
| <p>You need certain system level requirements in order to install Airflow. Those are requirements that are known |
| to be needed for Linux system (Tested on Ubuntu Buster LTS) :</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo apt-get install -y --no-install-recommends <span class="se">\</span> |
| freetds-bin <span class="se">\</span> |
| krb5-user <span class="se">\</span> |
| ldap-utils <span class="se">\</span> |
| libffi6 <span class="se">\</span> |
| libsasl2-2 <span class="se">\</span> |
| libsasl2-modules <span class="se">\</span> |
| libssl1.1 <span class="se">\</span> |
| locales <span class="se">\</span> |
| lsb-release <span class="se">\</span> |
| sasl2-bin <span class="se">\</span> |
| sqlite3 <span class="se">\</span> |
| unixodbc |
| </pre></div> |
| </div> |
| <p>You also need database client packages (Postgres or MySQL) if you want to use those databases.</p> |
| <p>If the <code class="docutils literal notranslate"><span class="pre">airflow</span></code> command is not getting recognized (can happen on Windows when using WSL), then |
| ensure that <code class="docutils literal notranslate"><span class="pre">~/.local/bin</span></code> is in your <code class="docutils literal notranslate"><span class="pre">PATH</span></code> environment variable, and add it in if necessary:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">PATH</span><span class="o">=</span><span class="nv">$PATH</span>:~/.local/bin |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="extra-packages"> |
| <span id="installation-extra-packages"></span><h2><a class="toc-backref" href="#id3">Extra Packages</a><a class="headerlink" href="#extra-packages" title="Permalink to this headline">¶</a></h2> |
| <p>The <code class="docutils literal notranslate"><span class="pre">apache-airflow</span></code> PyPI basic package only installs what's needed to get started. |
| Subpackages can be installed depending on what will be useful in your |
| environment. For instance, if you don't need connectivity with Postgres, |
| you won't have to go through the trouble of installing the <code class="docutils literal notranslate"><span class="pre">postgres-devel</span></code> |
| yum package, or whatever equivalent applies on the distribution you are using.</p> |
| <p>Behind the scenes, Airflow does conditional imports of operators that require |
| these extra dependencies.</p> |
| <p>For the list of the subpackages and what they enable, see: <a class="reference internal" href="extra-packages-ref.html"><span class="doc">Extra Packages Reference</span></a>.</p> |
| </div> |
| <div class="section" id="provider-packages"> |
| <span id="installation-provider-packages"></span><h2><a class="toc-backref" href="#id4">Provider packages</a><a class="headerlink" href="#provider-packages" title="Permalink to this headline">¶</a></h2> |
| <p>Unlike Apache Airflow 1.10, the Airflow 2.0 is delivered in multiple, separate, but connected packages. |
| The core of Airflow scheduling system is delivered as <code class="docutils literal notranslate"><span class="pre">apache-airflow</span></code> package and there are around |
| 60 providers packages which can be installed separately as so called "Airflow Provider packages". |
| The default Airflow installation doesn't have many integrations and you have to install them yourself.</p> |
| <p>You can even develop and install your own providers for Airflow. For more information, |
| see: <a class="reference external" href="/docs/apache-airflow-providers/index.html" title="(in apache-airflow-providers vmaster)"><span>Provider packages</span></a></p> |
| <p>For the list of the provider packages and what they enable, see: <a class="reference external" href="/docs/apache-airflow-providers/packages-ref.html" title="(in apache-airflow-providers vmaster)"><span>Providers packages reference</span></a>.</p> |
| </div> |
| <div class="section" id="initializing-airflow-database"> |
| <h2><a class="toc-backref" href="#id5">Initializing Airflow Database</a><a class="headerlink" href="#initializing-airflow-database" title="Permalink to this headline">¶</a></h2> |
| <p>Airflow requires a database to be initialized before you can run tasks. If |
| you're just experimenting and learning Airflow, you can stick with the |
| default SQLite option. If you don't want to use SQLite, then take a look at |
| <a class="reference internal" href="howto/initialize-database.html"><span class="doc">Initializing a Database Backend</span></a> to setup a different database.</p> |
| <p>After configuration, you'll need to initialize the database before you can |
| run tasks:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>airflow db init |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="docker-image"> |
| <h2><a class="toc-backref" href="#id6">Docker image</a><a class="headerlink" href="#docker-image" title="Permalink to this headline">¶</a></h2> |
| <p>Airflow is also distributed as a Docker image (OCI Image). For more information, see: <a class="reference internal" href="production-deployment.html"><span class="doc">Production Deployment</span></a></p> |
| </div> |
| <div class="section" id="troubleshooting"> |
| <h2><a class="toc-backref" href="#id7">Troubleshooting</a><a class="headerlink" href="#troubleshooting" title="Permalink to this headline">¶</a></h2> |
| <p>This section describes how to troubleshoot installation issues.</p> |
| <div class="section" id="symbol-not-found-py-getargcargv"> |
| <h3><a class="toc-backref" href="#id8"><code class="docutils literal notranslate"><span class="pre">Symbol</span> <span class="pre">not</span> <span class="pre">found:</span> <span class="pre">_Py_GetArgcArgv</span></code></a><a class="headerlink" href="#symbol-not-found-py-getargcargv" title="Permalink to this headline">¶</a></h3> |
| <p>If you see <code class="docutils literal notranslate"><span class="pre">Symbol</span> <span class="pre">not</span> <span class="pre">found:</span> <span class="pre">_Py_GetArgcArgv</span></code> while starting or importing Airflow, this may mean that you are using an incompatible version of Python. |
| For a homebrew installed version of Python, this is generally caused by using Python in <code class="docutils literal notranslate"><span class="pre">/usr/local/opt/bin</span></code> rather than the Frameworks installation (e.g. for <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">3.7</span></code>: <code class="docutils literal notranslate"><span class="pre">/usr/local/opt/python@3.7/Frameworks/Python.framework/Versions/3.7</span></code>).</p> |
| <p>The crux of the issue is that a library Airflow depends on, <code class="docutils literal notranslate"><span class="pre">setproctitle</span></code>, uses a non-public Python API |
| which is not available from the standard installation <code class="docutils literal notranslate"><span class="pre">/usr/local/opt/</span></code> (which symlinks to a path under <code class="docutils literal notranslate"><span class="pre">/usr/local/Cellar</span></code>).</p> |
| <p>An easy fix is just to ensure you use a version of Python that has a dylib of the Python library available. For example:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="c1"># Note: these instructions are for python3.7 but can be loosely modified for other versions</span> |
| brew install python@3.7 |
| virtualenv -p /usr/local/opt/python@3.7/Frameworks/Python.framework/Versions/3.7/bin/python3 .toy-venv |
| <span class="nb">source</span> .toy-venv/bin/activate |
| pip install apache-airflow |
| python |
| >>> import setproctitle |
| <span class="c1"># Success!</span> |
| </pre></div> |
| </div> |
| <p>Alternatively, you can download and install Python directly from the <a class="reference external" href="https://www.python.org/">Python website</a>.</p> |
| </div> |
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