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<p class="caption"><span class="caption-text">Content</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../index.html">Home</a></li>
<li class="toctree-l1"><a class="reference internal" href="../project.html">Project</a></li>
<li class="toctree-l1"><a class="reference internal" href="../license.html">License</a></li>
<li class="toctree-l1"><a class="reference internal" href="../start/index.html">Quick Start</a></li>
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Upgrading from 1.10 to 2</a><ul class="current">
<li class="toctree-l2 current"><a class="current reference internal" href="#">Upgrade Check Script</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#getting-the-airflow-upgrade-check-package">Getting the Airflow Upgrade Check Package</a></li>
<li class="toctree-l3"><a class="reference internal" href="#running-the-airflow-upgrade-check-package">Running the Airflow Upgrade Check Package</a></li>
<li class="toctree-l3"><a class="reference internal" href="#understanding-what-is-being-checked">Understanding what is being checked</a></li>
<li class="toctree-l3"><a class="reference internal" href="#applying-the-recommendations">Applying the Recommendations</a></li>
<li class="toctree-l3"><a class="reference internal" href="#turning-off-checks">Turning off checks</a></li>
<li class="toctree-l3"><a class="reference internal" href="#adding-custom-checks">Adding custom checks</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-1-switch-to-python-3">Step 1: Switch to Python 3</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-2-upgrade-to-1-10-15">Step 2: Upgrade to 1.10.15</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-3-run-the-upgrade-check-scripts">Step 3: Run the Upgrade check scripts</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-4-switch-to-backport-providers">Step 4: Switch to Backport Providers</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-5-upgrade-airflow-dags">Step 5: Upgrade Airflow DAGs</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-6-upgrade-configuration-settings">Step 6: Upgrade Configuration settings</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#step-7-upgrade-to-airflow-2">Step 7: Upgrade to Airflow 2</a></li>
<li class="toctree-l2"><a class="reference internal" href="index.html#appendix">Appendix</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../tutorial.html">Tutorial</a></li>
<li class="toctree-l1"><a class="reference internal" href="../tutorial_taskflow_api.html">Tutorial on the Taskflow API</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../concepts/index.html">Concepts</a></li>
<li class="toctree-l1"><a class="reference internal" href="../executor/index.html">Executor</a></li>
<li class="toctree-l1"><a class="reference internal" href="../dag-run.html">DAG Runs</a></li>
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<blockquote>
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<div class="section" id="upgrade-check-script">
<h1>Upgrade Check Script<a class="headerlink" href="#upgrade-check-script" 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-the-airflow-upgrade-check-package" id="id1">Getting the Airflow Upgrade Check Package</a></p></li>
<li><p><a class="reference internal" href="#running-the-airflow-upgrade-check-package" id="id2">Running the Airflow Upgrade Check Package</a></p></li>
<li><p><a class="reference internal" href="#understanding-what-is-being-checked" id="id3">Understanding what is being checked</a></p></li>
<li><p><a class="reference internal" href="#applying-the-recommendations" id="id4">Applying the Recommendations</a></p></li>
<li><p><a class="reference internal" href="#turning-off-checks" id="id5">Turning off checks</a></p></li>
<li><p><a class="reference internal" href="#adding-custom-checks" id="id6">Adding custom checks</a></p></li>
</ul>
</div>
<div class="section" id="getting-the-airflow-upgrade-check-package">
<span id="upgrade-check"></span><h2><a class="toc-backref" href="#id1">Getting the Airflow Upgrade Check Package</a><a class="headerlink" href="#getting-the-airflow-upgrade-check-package" title="Permalink to this headline"></a></h2>
<p>Apache Airflow is published as <code class="docutils literal notranslate"><span class="pre">apache-airflow</span></code> package in PyPI. The Upgrade Check Script is part of a
separate Python Package, since it is separate from the core Apache Airflow package and is only needed for
a period of time and specifically only for upgrading from Airflow 1.10 releases to Airflow 2.0.</p>
<p>While there has been a lot of work put into making this upgrade as easy as possible, there are some
changes which are compatible between Airflow 1.10 and Airflow 2.0. In order to make this as simple to
navigate, we recommend that people first upgrade to the latest release in the 1.10 series (at the
time of writing: 1.10.15) and then to download this package and run the script as detailed below.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Only <code class="docutils literal notranslate"><span class="pre">pip</span></code> installation is currently officially supported.</p>
<p>While they are some successes with using other tools like <a class="reference external" href="https://python-poetry.org/">poetry</a> or
<a class="reference external" href="https://pypi.org/project/pip-tools/">pip-tools</a>, they do not share the same workflow as
<code class="docutils literal notranslate"><span class="pre">pip</span></code> - especially when it comes to constraint vs. requirements management.
Installing via <code class="docutils literal notranslate"><span class="pre">Poetry</span></code> or <code class="docutils literal notranslate"><span class="pre">pip-tools</span></code> is not currently supported.</p>
<p>If you wish to install airflow using those tools you should use the constraint files and convert
them to appropriate format and workflow that your tool requires.</p>
</div>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>pip install apache-airflow-upgrade-check
</pre></div>
</div>
<p>This will install the latest version of the Airflow Upgrade check package.</p>
</div>
<div class="section" id="running-the-airflow-upgrade-check-package">
<h2><a class="toc-backref" href="#id2">Running the Airflow Upgrade Check Package</a><a class="headerlink" href="#running-the-airflow-upgrade-check-package" title="Permalink to this headline"></a></h2>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>airflow upgrade_check
</pre></div>
</div>
<p>This will print out to the screen a number of actions that should be taken before upgrading the Airflow
release to 2.0.0 or higher.</p>
<p>The exit code of the command will be 0 (success) if no problems are found in running the command, or 1 if
problems were encountered in running the check.</p>
<p>A sample output as a result of a successful run of the upgrade check is shown below.</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="o">==============================================</span> <span class="nv">STATUS</span> <span class="o">============================================</span>
Check <span class="k">for</span> latest versions of apache-airflow and checker..................................SUCCESS
Remove airflow.AirflowMacroPlugin class..................................................SUCCESS
Chain between DAG and operator not allowed...............................................SUCCESS
Connection.conn_id is not unique.........................................................SUCCESS
Connection.conn_type is not nullable.....................................................SUCCESS
Fernet is enabled by default.............................................................FAIL
GCP service account key deprecation......................................................SUCCESS
Changes <span class="k">in</span> import paths of hooks, operators, sensors and others..........................FAIL
Users must delete deprecated configs <span class="k">for</span> KubernetesExecutor..............................FAIL
Legacy UI is deprecated by default.......................................................SUCCESS
Logging configuration has been moved to new section......................................FAIL
Removal of Mesos Executor................................................................SUCCESS
Users must <span class="nb">set</span> a kubernetes.pod_template_file value......................................FAIL
SendGrid email uses old airflow.contrib module...........................................SUCCESS
Changes <span class="k">in</span> import path of remote task handlers...........................................SUCCESS
Jinja Template Variables cannot be undefined.............................................FAIL
Found <span class="m">7</span> problems.
<span class="o">==========================================</span> <span class="nv">RECOMMENDATIONS</span> <span class="o">========================================</span>
Fernet is enabled by default
----------------------------
The fernet mechanism is enabled by default to increase the security of the default installation.
Problems:
<span class="m">1</span>. fernet_key <span class="k">in</span> airflow.cfg must be explicitly <span class="nb">set</span> empty as fernet mechanism is enabledby default. This means that the apache-airflow<span class="o">[</span>crypto<span class="o">]</span> extra-packages are always installed.However, this requires that your operating system has libffi-dev installed.
Changes <span class="k">in</span> import paths of hooks, operators, sensors and others
---------------------------------------------------------------
Many hooks, operators and other classes has been renamed and moved. Those changes were part of unifying names and imports paths as described <span class="k">in</span> AIP-21.
The contrib folder has been replaced by providers directory and packages:
https://github.com/apache/airflow#backport-packages
Problems:
<span class="m">1</span>. Using <span class="sb">``</span>airflow.operators.python_operator.PythonOperator<span class="sb">``</span> will be replaced by <span class="sb">``</span>airflow.operators.python.PythonOperator<span class="sb">``</span>. Affected file:
</pre></div>
</div>
<p>The following sections describe what is being done and how to apply the recommendations shown above.
Please note that the above results shown are only a partial set, where only the first
two of the seven problems identified are shown in the section above. In reality,
all the problems are shown on the screen.</p>
</div>
<div class="section" id="understanding-what-is-being-checked">
<h2><a class="toc-backref" href="#id3">Understanding what is being checked</a><a class="headerlink" href="#understanding-what-is-being-checked" title="Permalink to this headline"></a></h2>
<p>The Upgrade Check checks the configuration data from airflow.cfg, the meta data from the Airflow
database, as well as the DAGs which have been set up in the current Airflow environment.</p>
<p>Using the above results as an example, there are two specific problems which have
been identified.</p>
<p>The first problem is identified in the configuration file airflow.cfg where the current configuration
option for the fernet_key is no longer acceptable and needs to be changed. This is because as of
Airflow 2.0, the fernet_key cannot be left empty, but needs to have a defined value. Examining the
problematic airflow.cfg and searching for the fernet_key entries would show the following:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">fernet_key</span> <span class="o">=</span>
</pre></div>
</div>
<p>The second problem was identified in one of the DAGs. In this case, this import
statement for the <code class="docutils literal notranslate"><span class="pre">PythonOperator</span></code> needs to be changed, since the location is different
in Airflow 2.0. Examining the DAG file would probably show the following:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">airflow.operators.python_operator</span> <span class="kn">import</span> <span class="n">PythonOperator</span>
</pre></div>
</div>
<p>We will discuss how to fix these and make them compatible with Airflow 2.0 in the next
section.</p>
</div>
<div class="section" id="applying-the-recommendations">
<h2><a class="toc-backref" href="#id4">Applying the Recommendations</a><a class="headerlink" href="#applying-the-recommendations" title="Permalink to this headline"></a></h2>
<p>In most cases, the Recommendations result section of the Upgrade check contains
enough information to make the change.</p>
<p>For the first problem identified above with respect to the fernet_key, the solution is
to enter a valid value in the Airflow Configuration file airflow.cfg for the fernet_key.</p>
<p>For the second problem, looking at the source of the DAG file and changing the import
statement for the Python Operator to be as follows will make this DAG work in Airflow 2.0.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">airflow.operators.python</span> <span class="kn">import</span> <span class="n">PythonOperator</span>
</pre></div>
</div>
<p>However, at the time of writing, this is incompatible in Airflow 1.10.15. So, this change
can only be made while moving to Airflow 2.0.</p>
</div>
<div class="section" id="turning-off-checks">
<h2><a class="toc-backref" href="#id5">Turning off checks</a><a class="headerlink" href="#turning-off-checks" title="Permalink to this headline"></a></h2>
<p>Advanced Airflow users or those with multiple Airflow deployments may want to
customize the Upgrade Checks to their environment by turning off certain
checks which are not applicable to them. An example of this is users with
Airflow deployments not using the <code class="docutils literal notranslate"><span class="pre">KubernetesPodOperator</span></code> may want to turn off upgrade
checks related to the <code class="docutils literal notranslate"><span class="pre">KubernetesPodOperator</span></code>.</p>
<p>This can be done by creating an “upgrade config file” in YAML as shown below:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ignored_rules</span><span class="p">:</span>
<span class="o">-</span> <span class="n">PodTemplateFileRule</span>
</pre></div>
</div>
<p>To use this configuration file (named <code class="docutils literal notranslate"><span class="pre">upgrade-configuration.yaml</span></code> for this
example) while running the upgrade check script, use the following command syntax:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>airflow upgrade_check --config<span class="o">=</span>./upgrade-configuration.yaml
</pre></div>
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</div>
<div class="section" id="adding-custom-checks">
<h2><a class="toc-backref" href="#id6">Adding custom checks</a><a class="headerlink" href="#adding-custom-checks" title="Permalink to this headline"></a></h2>
<p>Advanced Airflow users or those with multiple Airflow deployments may also
want to add additional upgrade checks for specific elements in their
environment whether it is DAGs or configuration related.</p>
<p>These additional checks should be defined in a Python class and added as
<code class="docutils literal notranslate"><span class="pre">custom_rules</span></code> in the “upgrade config file” as shown below:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">custom_rules</span><span class="p">:</span>
<span class="o">-</span> <span class="n">path</span><span class="o">.</span><span class="n">CustomCheckClass1</span>
<span class="o">-</span> <span class="n">path</span><span class="o">.</span><span class="n">CustomCheckClass2</span>
</pre></div>
</div>
<p>Now, invoke the upgrade check script using this configuration file as shown
below (the config file is named <code class="docutils literal notranslate"><span class="pre">upgrade-configuration.yaml</span></code> in
this example):</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>airflow upgrade_check --config<span class="o">=</span>./upgrade-configuration.yaml
</pre></div>
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<li><a class="reference internal" href="#">Upgrade Check Script</a><ul>
<li><a class="reference internal" href="#getting-the-airflow-upgrade-check-package">Getting the Airflow Upgrade Check Package</a></li>
<li><a class="reference internal" href="#running-the-airflow-upgrade-check-package">Running the Airflow Upgrade Check Package</a></li>
<li><a class="reference internal" href="#understanding-what-is-being-checked">Understanding what is being checked</a></li>
<li><a class="reference internal" href="#applying-the-recommendations">Applying the Recommendations</a></li>
<li><a class="reference internal" href="#turning-off-checks">Turning off checks</a></li>
<li><a class="reference internal" href="#adding-custom-checks">Adding custom checks</a></li>
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