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| <blockquote> |
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| <div class="section" id="bashoperator"> |
| <span id="howto-operator-bashoperator"></span><h1>BashOperator<a class="headerlink" href="#bashoperator" title="Permalink to this headline">¶</a></h1> |
| <p>Use the <a class="reference internal" href="../../_api/airflow/operators/bash_operator/index.html#airflow.operators.bash_operator.BashOperator" title="airflow.operators.bash_operator.BashOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">BashOperator</span></code></a> to execute |
| commands in a <a class="reference external" href="https://www.gnu.org/software/bash/">Bash</a> shell.</p> |
| <div class="example-block-wrapper docutils container"> |
| <p class="example-header example-header--with-button"><span class="example-title">airflow/example_dags/example_bash_operator.py</span><a class="example-header-button viewcode-button reference internal" href="../../_modules/airflow/example_dags/example_bash_operator.html"><span>View Source</span></a></p> |
| <div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">run_this</span> <span class="o">=</span> <span class="n">BashOperator</span><span class="p">(</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'run_after_loop'</span><span class="p">,</span> |
| <span class="n">bash_command</span><span class="o">=</span><span class="s1">'echo 1'</span><span class="p">,</span> |
| <span class="n">dag</span><span class="o">=</span><span class="n">dag</span><span class="p">,</span> |
| <span class="p">)</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="templating"> |
| <h2>Templating<a class="headerlink" href="#templating" title="Permalink to this headline">¶</a></h2> |
| <p>You can use <a class="reference internal" href="../../concepts.html#jinja-templating"><span class="std std-ref">Jinja templates</span></a> to parameterize the |
| <code class="docutils literal notranslate"><span class="pre">bash_command</span></code> argument.</p> |
| <div class="example-block-wrapper docutils container"> |
| <p class="example-header example-header--with-button"><span class="example-title">airflow/example_dags/example_bash_operator.py</span><a class="example-header-button viewcode-button reference internal" href="../../_modules/airflow/example_dags/example_bash_operator.html"><span>View Source</span></a></p> |
| <div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">also_run_this</span> <span class="o">=</span> <span class="n">BashOperator</span><span class="p">(</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'also_run_this'</span><span class="p">,</span> |
| <span class="n">bash_command</span><span class="o">=</span><span class="s1">'echo "run_id={{ run_id }} | dag_run={{ dag_run }}"'</span><span class="p">,</span> |
| <span class="n">dag</span><span class="o">=</span><span class="n">dag</span><span class="p">,</span> |
| <span class="p">)</span> |
| </pre></div> |
| </div> |
| </div> |
| </div> |
| <div class="section" id="troubleshooting"> |
| <h2>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline">¶</a></h2> |
| <div class="section" id="jinja-template-not-found"> |
| <h3>Jinja template not found<a class="headerlink" href="#jinja-template-not-found" title="Permalink to this headline">¶</a></h3> |
| <p>Add a space after the script name when directly calling a Bash script with |
| the <code class="docutils literal notranslate"><span class="pre">bash_command</span></code> argument. This is because Airflow tries to apply a Jinja |
| template to it, which will fail.</p> |
| <div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">t2</span> <span class="o">=</span> <span class="n">BashOperator</span><span class="p">(</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="s1">'bash_example'</span><span class="p">,</span> |
| |
| <span class="c1"># This fails with 'Jinja template not found' error</span> |
| <span class="c1"># bash_command="/home/batcher/test.sh",</span> |
| |
| <span class="c1"># This works (has a space after)</span> |
| <span class="n">bash_command</span><span class="o">=</span><span class="s2">"/home/batcher/test.sh "</span><span class="p">,</span> |
| <span class="n">dag</span><span class="o">=</span><span class="n">dag</span><span class="p">)</span> |
| </pre></div> |
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