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| <h1>Source code for airflow.contrib.operators.docker_swarm_operator</h1><div class="highlight"><pre> |
| <span></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"># "License"); 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"># "AS IS" 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">'''</span> |
| <span class="sd">Run ephemeral Docker Swarm services</span> |
| <span class="sd">'''</span> |
| |
| <span class="kn">from</span> <span class="nn">docker</span> <span class="kn">import</span> <span class="n">types</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="kn">import</span> <span class="n">AirflowException</span> |
| <span class="kn">from</span> <span class="nn">airflow.operators.docker_operator</span> <span class="kn">import</span> <span class="n">DockerOperator</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.decorators</span> <span class="kn">import</span> <span class="n">apply_defaults</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.strings</span> <span class="kn">import</span> <span class="n">get_random_string</span> |
| |
| |
| <div class="viewcode-block" id="DockerSwarmOperator"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/docker_swarm_operator/index.html#airflow.contrib.operators.docker_swarm_operator.DockerSwarmOperator">[docs]</a><span class="k">class</span> <span class="nc">DockerSwarmOperator</span><span class="p">(</span><span class="n">DockerOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Execute a command as an ephemeral docker swarm service.</span> |
| <span class="sd"> Example use-case - Using Docker Swarm orchestration to make one-time</span> |
| <span class="sd"> scripts highly available.</span> |
| |
| <span class="sd"> A temporary directory is created on the host and</span> |
| <span class="sd"> mounted into a container to allow storing files</span> |
| <span class="sd"> that together exceed the default disk size of 10GB in a container.</span> |
| <span class="sd"> The path to the mounted directory can be accessed</span> |
| <span class="sd"> via the environment variable ``AIRFLOW_TMP_DIR``.</span> |
| |
| <span class="sd"> If a login to a private registry is required prior to pulling the image, a</span> |
| <span class="sd"> Docker connection needs to be configured in Airflow and the connection ID</span> |
| <span class="sd"> be provided with the parameter ``docker_conn_id``.</span> |
| |
| <span class="sd"> :param image: Docker image from which to create the container.</span> |
| <span class="sd"> If image tag is omitted, "latest" will be used.</span> |
| <span class="sd"> :type image: str</span> |
| <span class="sd"> :param api_version: Remote API version. Set to ``auto`` to automatically</span> |
| <span class="sd"> detect the server's version.</span> |
| <span class="sd"> :type api_version: str</span> |
| <span class="sd"> :param auto_remove: Auto-removal of the container on daemon side when the</span> |
| <span class="sd"> container's process exits.</span> |
| <span class="sd"> The default is False.</span> |
| <span class="sd"> :type auto_remove: bool</span> |
| <span class="sd"> :param command: Command to be run in the container. (templated)</span> |
| <span class="sd"> :type command: str or list</span> |
| <span class="sd"> :param docker_url: URL of the host running the docker daemon.</span> |
| <span class="sd"> Default is unix://var/run/docker.sock</span> |
| <span class="sd"> :type docker_url: str</span> |
| <span class="sd"> :param environment: Environment variables to set in the container. (templated)</span> |
| <span class="sd"> :type environment: dict</span> |
| <span class="sd"> :param force_pull: Pull the docker image on every run. Default is False.</span> |
| <span class="sd"> :type force_pull: bool</span> |
| <span class="sd"> :param mem_limit: Maximum amount of memory the container can use.</span> |
| <span class="sd"> Either a float value, which represents the limit in bytes,</span> |
| <span class="sd"> or a string like ``128m`` or ``1g``.</span> |
| <span class="sd"> :type mem_limit: float or str</span> |
| <span class="sd"> :param tls_ca_cert: Path to a PEM-encoded certificate authority</span> |
| <span class="sd"> to secure the docker connection.</span> |
| <span class="sd"> :type tls_ca_cert: str</span> |
| <span class="sd"> :param tls_client_cert: Path to the PEM-encoded certificate</span> |
| <span class="sd"> used to authenticate docker client.</span> |
| <span class="sd"> :type tls_client_cert: str</span> |
| <span class="sd"> :param tls_client_key: Path to the PEM-encoded key used to authenticate docker client.</span> |
| <span class="sd"> :type tls_client_key: str</span> |
| <span class="sd"> :param tls_hostname: Hostname to match against</span> |
| <span class="sd"> the docker server certificate or False to disable the check.</span> |
| <span class="sd"> :type tls_hostname: str or bool</span> |
| <span class="sd"> :param tls_ssl_version: Version of SSL to use when communicating with docker daemon.</span> |
| <span class="sd"> :type tls_ssl_version: str</span> |
| <span class="sd"> :param tmp_dir: Mount point inside the container to</span> |
| <span class="sd"> a temporary directory created on the host by the operator.</span> |
| <span class="sd"> The path is also made available via the environment variable</span> |
| <span class="sd"> ``AIRFLOW_TMP_DIR`` inside the container.</span> |
| <span class="sd"> :type tmp_dir: str</span> |
| <span class="sd"> :param user: Default user inside the docker container.</span> |
| <span class="sd"> :type user: int or str</span> |
| <span class="sd"> :param docker_conn_id: ID of the Airflow connection to use</span> |
| <span class="sd"> :type docker_conn_id: str</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@apply_defaults</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">image</span><span class="p">,</span> |
| <span class="o">*</span><span class="n">args</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| |
| <span class="nb">super</span><span class="p">(</span><span class="n">DockerSwarmOperator</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">image</span><span class="o">=</span><span class="n">image</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">service</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <div class="viewcode-block" id="DockerSwarmOperator._run_image"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/docker_swarm_operator/index.html#airflow.contrib.operators.docker_swarm_operator.DockerSwarmOperator._run_image">[docs]</a> <span class="k">def</span> <span class="nf">_run_image</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Starting docker service from image </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">image</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">service</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cli</span><span class="o">.</span><span class="n">create_service</span><span class="p">(</span> |
| <span class="n">types</span><span class="o">.</span><span class="n">TaskTemplate</span><span class="p">(</span> |
| <span class="n">container_spec</span><span class="o">=</span><span class="n">types</span><span class="o">.</span><span class="n">ContainerSpec</span><span class="p">(</span> |
| <span class="n">image</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">image</span><span class="p">,</span> |
| <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">get_command</span><span class="p">(),</span> |
| <span class="n">env</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">environment</span><span class="p">,</span> |
| <span class="n">user</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">user</span> |
| <span class="p">),</span> |
| <span class="n">restart_policy</span><span class="o">=</span><span class="n">types</span><span class="o">.</span><span class="n">RestartPolicy</span><span class="p">(</span><span class="n">condition</span><span class="o">=</span><span class="s1">'none'</span><span class="p">),</span> |
| <span class="n">resources</span><span class="o">=</span><span class="n">types</span><span class="o">.</span><span class="n">Resources</span><span class="p">(</span><span class="n">mem_limit</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">mem_limit</span><span class="p">)</span> |
| <span class="p">),</span> |
| <span class="n">name</span><span class="o">=</span><span class="s1">'airflow-</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">get_random_string</span><span class="p">(),</span> |
| <span class="n">labels</span><span class="o">=</span><span class="p">{</span><span class="s1">'name'</span><span class="p">:</span> <span class="s1">'airflow__</span><span class="si">%s</span><span class="s1">__</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dag_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">)}</span> |
| <span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Service started: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">))</span> |
| |
| <span class="n">status</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="c1"># wait for the service to start the task</span> |
| <span class="k">while</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">cli</span><span class="o">.</span><span class="n">tasks</span><span class="p">(</span><span class="n">filters</span><span class="o">=</span><span class="p">{</span><span class="s1">'service'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">[</span><span class="s1">'ID'</span><span class="p">]}):</span> |
| <span class="k">continue</span> |
| <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> |
| |
| <span class="n">status</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cli</span><span class="o">.</span><span class="n">tasks</span><span class="p">(</span> |
| <span class="n">filters</span><span class="o">=</span><span class="p">{</span><span class="s1">'service'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">[</span><span class="s1">'ID'</span><span class="p">]}</span> |
| <span class="p">)[</span><span class="mi">0</span><span class="p">][</span><span class="s1">'Status'</span><span class="p">][</span><span class="s1">'State'</span><span class="p">]</span> |
| <span class="k">if</span> <span class="n">status</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'failed'</span><span class="p">,</span> <span class="s1">'complete'</span><span class="p">]:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Service status before exiting: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">status</span><span class="p">)</span> |
| <span class="k">break</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">auto_remove</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">cli</span><span class="o">.</span><span class="n">remove_service</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">[</span><span class="s1">'ID'</span><span class="p">])</span> |
| <span class="k">if</span> <span class="n">status</span> <span class="o">==</span> <span class="s1">'failed'</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">'Service failed: '</span> <span class="o">+</span> <span class="nb">repr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">))</span></div> |
| |
| <div class="viewcode-block" id="DockerSwarmOperator.on_kill"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/docker_swarm_operator/index.html#airflow.contrib.operators.docker_swarm_operator.DockerSwarmOperator.on_kill">[docs]</a> <span class="k">def</span> <span class="nf">on_kill</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">cli</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Removing docker service: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">[</span><span class="s1">'ID'</span><span class="p">])</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">cli</span><span class="o">.</span><span class="n">remove_service</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">service</span><span class="p">[</span><span class="s1">'ID'</span><span class="p">])</span></div></div> |
| </pre></div> |
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