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<h1>Source code for airflow.contrib.example_dags.example_gcp_function</h1><div class="highlight"><pre>
<span></span><span class="c1"># -*- coding: utf-8 -*-</span>
<span class="c1">#</span>
<span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span>
<span class="c1"># or more contributor license agreements. See the NOTICE file</span>
<span class="c1"># distributed with this work for additional information</span>
<span class="c1"># regarding copyright ownership. The ASF licenses this file</span>
<span class="c1"># to you under the Apache License, Version 2.0 (the</span>
<span class="c1"># &quot;License&quot;); you may not use this file except in compliance</span>
<span class="c1"># with the License. You may obtain a copy of the License at</span>
<span class="c1">#</span>
<span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="c1">#</span>
<span class="c1"># Unless required by applicable law or agreed to in writing,</span>
<span class="c1"># software distributed under the License is distributed on an</span>
<span class="c1"># &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span>
<span class="c1"># KIND, either express or implied. See the License for the</span>
<span class="c1"># specific language governing permissions and limitations</span>
<span class="c1"># under the License.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">Example Airflow DAG that displays interactions with Google Cloud Functions.</span>
<span class="sd">It creates a function and then deletes it.</span>
<span class="sd">This DAG relies on the following OS environment variables</span>
<span class="sd">https://airflow.apache.org/concepts.html#variables</span>
<span class="sd">* GCP_PROJECT_ID - Google Cloud Project to use for the Cloud Function.</span>
<span class="sd">* GCP_LOCATION - Google Cloud Functions region where the function should be</span>
<span class="sd"> created.</span>
<span class="sd">* GCF_ENTRYPOINT - Name of the executable function in the source code.</span>
<span class="sd">* and one of the below:</span>
<span class="sd"> * GCF_SOURCE_ARCHIVE_URL - Path to the zipped source in Google Cloud Storage</span>
<span class="sd"> * GCF_SOURCE_UPLOAD_URL - Generated upload URL for the zipped source and GCF_ZIP_PATH - Local path to</span>
<span class="sd"> the zipped source archive</span>
<span class="sd"> * GCF_SOURCE_REPOSITORY - The URL pointing to the hosted repository where the function</span>
<span class="sd"> is defined in a supported Cloud Source Repository URL format</span>
<span class="sd"> https://cloud.google.com/functions/docs/reference/rest/v1/projects.locations.functions#SourceRepository</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">from</span> <span class="nn">airflow</span> <span class="k">import</span> <span class="n">models</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.operators.gcp_function_operator</span> \
<span class="kn">import</span> <span class="nn">GcfFunctionDeployOperator</span><span class="o">,</span> <span class="nn">GcfFunctionDeleteOperator</span>
<span class="kn">from</span> <span class="nn">airflow.utils</span> <span class="k">import</span> <span class="n">dates</span>
<span class="c1"># [START howto_operator_gcf_common_variables]</span>
<span class="n">GCP_PROJECT_ID</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCP_PROJECT_ID&#39;</span><span class="p">,</span> <span class="s1">&#39;example-project&#39;</span><span class="p">)</span>
<span class="n">GCP_LOCATION</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCP_LOCATION&#39;</span><span class="p">,</span> <span class="s1">&#39;europe-west1&#39;</span><span class="p">)</span>
<span class="n">GCF_SHORT_FUNCTION_NAME</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCF_SHORT_FUNCTION_NAME&#39;</span><span class="p">,</span> <span class="s1">&#39;hello&#39;</span><span class="p">)</span><span class="o">.</span>\
<span class="n">replace</span><span class="p">(</span><span class="s2">&quot;-&quot;</span><span class="p">,</span> <span class="s2">&quot;_&quot;</span><span class="p">)</span> <span class="c1"># make sure there are no dashes in function name (!)</span>
<span class="n">FUNCTION_NAME</span> <span class="o">=</span> <span class="s1">&#39;projects/</span><span class="si">{}</span><span class="s1">/locations/</span><span class="si">{}</span><span class="s1">/functions/</span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span>
<span class="n">GCP_LOCATION</span><span class="p">,</span>
<span class="n">GCF_SHORT_FUNCTION_NAME</span><span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_common_variables]</span>
<span class="c1"># [START howto_operator_gcf_deploy_variables]</span>
<span class="n">GCF_SOURCE_ARCHIVE_URL</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCF_SOURCE_ARCHIVE_URL&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="n">GCF_SOURCE_UPLOAD_URL</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCF_SOURCE_UPLOAD_URL&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="n">GCF_SOURCE_REPOSITORY</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span>
<span class="s1">&#39;GCF_SOURCE_REPOSITORY&#39;</span><span class="p">,</span>
<span class="s1">&#39;https://source.developers.google.com/&#39;</span>
<span class="s1">&#39;projects/</span><span class="si">{}</span><span class="s1">/repos/hello-world/moveable-aliases/master&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">GCP_PROJECT_ID</span><span class="p">))</span>
<span class="n">GCF_ZIP_PATH</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCF_ZIP_PATH&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="n">GCF_ENTRYPOINT</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCF_ENTRYPOINT&#39;</span><span class="p">,</span> <span class="s1">&#39;helloWorld&#39;</span><span class="p">)</span>
<span class="n">GCF_RUNTIME</span> <span class="o">=</span> <span class="s1">&#39;nodejs6&#39;</span>
<span class="n">GCP_VALIDATE_BODY</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;GCP_VALIDATE_BODY&#39;</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_deploy_variables]</span>
<span class="c1"># [START howto_operator_gcf_deploy_body]</span>
<span class="n">body</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">&quot;name&quot;</span><span class="p">:</span> <span class="n">FUNCTION_NAME</span><span class="p">,</span>
<span class="s2">&quot;entryPoint&quot;</span><span class="p">:</span> <span class="n">GCF_ENTRYPOINT</span><span class="p">,</span>
<span class="s2">&quot;runtime&quot;</span><span class="p">:</span> <span class="n">GCF_RUNTIME</span><span class="p">,</span>
<span class="s2">&quot;httpsTrigger&quot;</span><span class="p">:</span> <span class="p">{}</span>
<span class="p">}</span>
<span class="c1"># [END howto_operator_gcf_deploy_body]</span>
<span class="c1"># [START howto_operator_gcf_default_args]</span>
<span class="n">default_args</span> <span class="o">=</span> <span class="p">{</span>
<span class="s1">&#39;start_date&#39;</span><span class="p">:</span> <span class="n">dates</span><span class="o">.</span><span class="n">days_ago</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="p">}</span>
<span class="c1"># [END howto_operator_gcf_default_args]</span>
<span class="c1"># [START howto_operator_gcf_deploy_variants]</span>
<span class="k">if</span> <span class="n">GCF_SOURCE_ARCHIVE_URL</span><span class="p">:</span>
<span class="n">body</span><span class="p">[</span><span class="s1">&#39;sourceArchiveUrl&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">GCF_SOURCE_ARCHIVE_URL</span>
<span class="k">elif</span> <span class="n">GCF_SOURCE_REPOSITORY</span><span class="p">:</span>
<span class="n">body</span><span class="p">[</span><span class="s1">&#39;sourceRepository&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
<span class="s1">&#39;url&#39;</span><span class="p">:</span> <span class="n">GCF_SOURCE_REPOSITORY</span>
<span class="p">}</span>
<span class="k">elif</span> <span class="n">GCF_ZIP_PATH</span><span class="p">:</span>
<span class="n">body</span><span class="p">[</span><span class="s1">&#39;sourceUploadUrl&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span>
<span class="n">default_args</span><span class="p">[</span><span class="s1">&#39;zip_path&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">GCF_ZIP_PATH</span>
<span class="k">elif</span> <span class="n">GCF_SOURCE_UPLOAD_URL</span><span class="p">:</span>
<span class="n">body</span><span class="p">[</span><span class="s1">&#39;sourceUploadUrl&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">GCF_SOURCE_UPLOAD_URL</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">Exception</span><span class="p">(</span><span class="s2">&quot;Please provide one of the source_code parameters&quot;</span><span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_deploy_variants]</span>
<span class="k">with</span> <span class="n">models</span><span class="o">.</span><span class="n">DAG</span><span class="p">(</span>
<span class="s1">&#39;example_gcp_function&#39;</span><span class="p">,</span>
<span class="n">default_args</span><span class="o">=</span><span class="n">default_args</span><span class="p">,</span>
<span class="n">schedule_interval</span><span class="o">=</span><span class="kc">None</span> <span class="c1"># Override to match your needs</span>
<span class="p">)</span> <span class="k">as</span> <span class="n">dag</span><span class="p">:</span>
<span class="c1"># [START howto_operator_gcf_deploy]</span>
<span class="n">deploy_task</span> <span class="o">=</span> <span class="n">GcfFunctionDeployOperator</span><span class="p">(</span>
<span class="n">task_id</span><span class="o">=</span><span class="s2">&quot;gcf_deploy_task&quot;</span><span class="p">,</span>
<span class="n">project_id</span><span class="o">=</span><span class="n">GCP_PROJECT_ID</span><span class="p">,</span>
<span class="n">location</span><span class="o">=</span><span class="n">GCP_LOCATION</span><span class="p">,</span>
<span class="n">body</span><span class="o">=</span><span class="n">body</span><span class="p">,</span>
<span class="n">validate_body</span><span class="o">=</span><span class="n">GCP_VALIDATE_BODY</span>
<span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_deploy]</span>
<span class="c1"># [START howto_operator_gcf_deploy_no_project_id]</span>
<span class="n">deploy2_task</span> <span class="o">=</span> <span class="n">GcfFunctionDeployOperator</span><span class="p">(</span>
<span class="n">task_id</span><span class="o">=</span><span class="s2">&quot;gcf_deploy2_task&quot;</span><span class="p">,</span>
<span class="n">location</span><span class="o">=</span><span class="n">GCP_LOCATION</span><span class="p">,</span>
<span class="n">body</span><span class="o">=</span><span class="n">body</span><span class="p">,</span>
<span class="n">validate_body</span><span class="o">=</span><span class="n">GCP_VALIDATE_BODY</span>
<span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_deploy_no_project_id]</span>
<span class="c1"># [START howto_operator_gcf_delete]</span>
<span class="n">delete_task</span> <span class="o">=</span> <span class="n">GcfFunctionDeleteOperator</span><span class="p">(</span>
<span class="n">task_id</span><span class="o">=</span><span class="s2">&quot;gcf_delete_task&quot;</span><span class="p">,</span>
<span class="n">name</span><span class="o">=</span><span class="n">FUNCTION_NAME</span>
<span class="p">)</span>
<span class="c1"># [END howto_operator_gcf_delete]</span>
<span class="n">deploy_task</span> <span class="o">&gt;&gt;</span> <span class="n">deploy2_task</span> <span class="o">&gt;&gt;</span> <span class="n">delete_task</span>
</pre></div>
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