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<h1>Source code for airflow.providers.ssh.hooks.ssh</h1><div class="highlight"><pre>
<span></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;Hook for SSH connections.&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">warnings</span>
<span class="kn">from</span> <span class="nn">base64</span> <span class="kn">import</span> <span class="n">decodebytes</span>
<span class="kn">from</span> <span class="nn">io</span> <span class="kn">import</span> <span class="n">StringIO</span>
<span class="kn">from</span> <span class="nn">select</span> <span class="kn">import</span> <span class="n">select</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">,</span> <span class="n">Tuple</span><span class="p">,</span> <span class="n">Type</span><span class="p">,</span> <span class="n">Union</span>
<span class="kn">import</span> <span class="nn">paramiko</span>
<span class="kn">from</span> <span class="nn">paramiko.config</span> <span class="kn">import</span> <span class="n">SSH_PORT</span>
<span class="kn">from</span> <span class="nn">sshtunnel</span> <span class="kn">import</span> <span class="n">SSHTunnelForwarder</span>
<span class="kn">from</span> <span class="nn">tenacity</span> <span class="kn">import</span> <span class="n">Retrying</span><span class="p">,</span> <span class="n">stop_after_attempt</span><span class="p">,</span> <span class="n">wait_fixed</span><span class="p">,</span> <span class="n">wait_random</span>
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span> <span class="o">&gt;=</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span>
<span class="kn">from</span> <span class="nn">functools</span> <span class="kn">import</span> <span class="n">cached_property</span>
<span class="k">else</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">cached_property</span> <span class="kn">import</span> <span class="n">cached_property</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.hooks.base</span> <span class="kn">import</span> <span class="n">BaseHook</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">airflow.utils.platform</span> <span class="kn">import</span> <span class="n">getuser</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">getpass</span> <span class="kn">import</span> <span class="n">getuser</span> <span class="c1"># type: ignore[misc]</span>
<div class="viewcode-block" id="TIMEOUT_DEFAULT"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.TIMEOUT_DEFAULT">[docs]</a><span class="n">TIMEOUT_DEFAULT</span> <span class="o">=</span> <span class="mi">10</span></div>
<div class="viewcode-block" id="SSHHook"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook">[docs]</a><span class="k">class</span> <span class="nc">SSHHook</span><span class="p">(</span><span class="n">BaseHook</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Hook for ssh remote execution using Paramiko.</span>
<span class="sd"> ref: https://github.com/paramiko/paramiko</span>
<span class="sd"> This hook also lets you create ssh tunnel and serve as basis for SFTP file transfer</span>
<span class="sd"> :param ssh_conn_id: :ref:`ssh connection id&lt;howto/connection:ssh&gt;` from airflow</span>
<span class="sd"> Connections from where all the required parameters can be fetched like</span>
<span class="sd"> username, password or key_file. Thought the priority is given to the</span>
<span class="sd"> param passed during init</span>
<span class="sd"> :param remote_host: remote host to connect</span>
<span class="sd"> :param username: username to connect to the remote_host</span>
<span class="sd"> :param password: password of the username to connect to the remote_host</span>
<span class="sd"> :param key_file: path to key file to use to connect to the remote_host</span>
<span class="sd"> :param port: port of remote host to connect (Default is paramiko SSH_PORT)</span>
<span class="sd"> :param conn_timeout: timeout (in seconds) for the attempt to connect to the remote_host.</span>
<span class="sd"> The default is 10 seconds. If provided, it will replace the `conn_timeout` which was</span>
<span class="sd"> predefined in the connection of `ssh_conn_id`.</span>
<span class="sd"> :param timeout: (Deprecated). timeout for the attempt to connect to the remote_host.</span>
<span class="sd"> Use conn_timeout instead.</span>
<span class="sd"> :param keepalive_interval: send a keepalive packet to remote host every</span>
<span class="sd"> keepalive_interval seconds</span>
<span class="sd"> :param banner_timeout: timeout to wait for banner from the server in seconds</span>
<span class="sd"> :param disabled_algorithms: dictionary mapping algorithm type to an</span>
<span class="sd"> iterable of algorithm identifiers, which will be disabled for the</span>
<span class="sd"> lifetime of the transport</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="c1"># List of classes to try loading private keys as, ordered (roughly) by most common to least common</span>
<span class="n">_pkey_loaders</span><span class="p">:</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">Type</span><span class="p">[</span><span class="n">paramiko</span><span class="o">.</span><span class="n">PKey</span><span class="p">]]</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">paramiko</span><span class="o">.</span><span class="n">RSAKey</span><span class="p">,</span>
<span class="n">paramiko</span><span class="o">.</span><span class="n">ECDSAKey</span><span class="p">,</span>
<span class="n">paramiko</span><span class="o">.</span><span class="n">Ed25519Key</span><span class="p">,</span>
<span class="n">paramiko</span><span class="o">.</span><span class="n">DSSKey</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">_host_key_mappings</span> <span class="o">=</span> <span class="p">{</span>
<span class="s1">&#39;rsa&#39;</span><span class="p">:</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">RSAKey</span><span class="p">,</span>
<span class="s1">&#39;dss&#39;</span><span class="p">:</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">DSSKey</span><span class="p">,</span>
<span class="s1">&#39;ecdsa&#39;</span><span class="p">:</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">ECDSAKey</span><span class="p">,</span>
<span class="s1">&#39;ed25519&#39;</span><span class="p">:</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">Ed25519Key</span><span class="p">,</span>
<span class="p">}</span>
<div class="viewcode-block" id="SSHHook.conn_name_attr"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.conn_name_attr">[docs]</a> <span class="n">conn_name_attr</span> <span class="o">=</span> <span class="s1">&#39;ssh_conn_id&#39;</span></div>
<div class="viewcode-block" id="SSHHook.default_conn_name"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.default_conn_name">[docs]</a> <span class="n">default_conn_name</span> <span class="o">=</span> <span class="s1">&#39;ssh_default&#39;</span></div>
<div class="viewcode-block" id="SSHHook.conn_type"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.conn_type">[docs]</a> <span class="n">conn_type</span> <span class="o">=</span> <span class="s1">&#39;ssh&#39;</span></div>
<div class="viewcode-block" id="SSHHook.hook_name"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.hook_name">[docs]</a> <span class="n">hook_name</span> <span class="o">=</span> <span class="s1">&#39;SSH&#39;</span></div>
<span class="nd">@staticmethod</span>
<div class="viewcode-block" id="SSHHook.get_ui_field_behaviour"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.get_ui_field_behaviour">[docs]</a> <span class="k">def</span> <span class="nf">get_ui_field_behaviour</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span>
<span class="sd">&quot;&quot;&quot;Returns custom field behaviour&quot;&quot;&quot;</span>
<span class="k">return</span> <span class="p">{</span>
<span class="s2">&quot;hidden_fields&quot;</span><span class="p">:</span> <span class="p">[</span><span class="s1">&#39;schema&#39;</span><span class="p">],</span>
<span class="s2">&quot;relabeling&quot;</span><span class="p">:</span> <span class="p">{</span>
<span class="s1">&#39;login&#39;</span><span class="p">:</span> <span class="s1">&#39;Username&#39;</span><span class="p">,</span></div>
<span class="p">},</span>
<span class="p">}</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">ssh_conn_id</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">remote_host</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
<span class="n">username</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">password</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">key_file</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">port</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">timeout</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">conn_timeout</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="n">keepalive_interval</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">30</span><span class="p">,</span>
<span class="n">banner_timeout</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">30.0</span><span class="p">,</span>
<span class="n">disabled_algorithms</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
<span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ssh_conn_id</span> <span class="o">=</span> <span class="n">ssh_conn_id</span>
<span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span> <span class="o">=</span> <span class="n">remote_host</span>
<span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="o">=</span> <span class="n">username</span>
<span class="bp">self</span><span class="o">.</span><span class="n">password</span> <span class="o">=</span> <span class="n">password</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="o">=</span> <span class="n">key_file</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pkey</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="n">port</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="n">timeout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span> <span class="o">=</span> <span class="n">conn_timeout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">keepalive_interval</span> <span class="o">=</span> <span class="n">keepalive_interval</span>
<span class="bp">self</span><span class="o">.</span><span class="n">banner_timeout</span> <span class="o">=</span> <span class="n">banner_timeout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">disabled_algorithms</span> <span class="o">=</span> <span class="n">disabled_algorithms</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host_proxy_cmd</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Default values, overridable from Connection</span>
<span class="bp">self</span><span class="o">.</span><span class="n">compress</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">no_host_key_check</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">allow_host_key_change</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host_key</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">look_for_keys</span> <span class="o">=</span> <span class="kc">True</span>
<span class="c1"># Placeholder for deprecated __enter__</span>
<span class="bp">self</span><span class="o">.</span><span class="n">client</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">paramiko</span><span class="o">.</span><span class="n">SSHClient</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Use connection to override defaults</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">ssh_conn_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connection</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ssh_conn_id</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">login</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">password</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">password</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">password</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span>
<span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">extra_options</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span>
<span class="k">if</span> <span class="s2">&quot;key_file&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;key_file&quot;</span><span class="p">)</span>
<span class="n">private_key</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;private_key&#39;</span><span class="p">)</span>
<span class="n">private_key_passphrase</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;private_key_passphrase&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">private_key</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pkey</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pkey_from_private_key</span><span class="p">(</span><span class="n">private_key</span><span class="p">,</span> <span class="n">passphrase</span><span class="o">=</span><span class="n">private_key_passphrase</span><span class="p">)</span>
<span class="k">if</span> <span class="s2">&quot;timeout&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span><span class="p">:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s1">&#39;Extra option `timeout` is deprecated.&#39;</span>
<span class="s1">&#39;Please use `conn_timeout` instead.&#39;</span>
<span class="s1">&#39;The old option `timeout` will be removed in a future version.&#39;</span><span class="p">,</span>
<span class="ne">DeprecationWarning</span><span class="p">,</span>
<span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">extra_options</span><span class="p">[</span><span class="s1">&#39;timeout&#39;</span><span class="p">])</span>
<span class="k">if</span> <span class="s2">&quot;conn_timeout&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">extra_options</span><span class="p">[</span><span class="s1">&#39;conn_timeout&#39;</span><span class="p">])</span>
<span class="k">if</span> <span class="s2">&quot;compress&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span> <span class="ow">and</span> <span class="nb">str</span><span class="p">(</span><span class="n">extra_options</span><span class="p">[</span><span class="s2">&quot;compress&quot;</span><span class="p">])</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;false&#39;</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">compress</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">host_key</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;host_key&quot;</span><span class="p">)</span>
<span class="n">no_host_key_check</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;no_host_key_check&quot;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">no_host_key_check</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">no_host_key_check</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">no_host_key_check</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s2">&quot;true&quot;</span>
<span class="k">if</span> <span class="n">host_key</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">no_host_key_check</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;Must check host key when provided&quot;</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">no_host_key_check</span> <span class="o">=</span> <span class="n">no_host_key_check</span>
<span class="k">if</span> <span class="p">(</span>
<span class="s2">&quot;allow_host_key_change&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span>
<span class="ow">and</span> <span class="nb">str</span><span class="p">(</span><span class="n">extra_options</span><span class="p">[</span><span class="s2">&quot;allow_host_key_change&quot;</span><span class="p">])</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;true&#39;</span>
<span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">allow_host_key_change</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">if</span> <span class="p">(</span>
<span class="s2">&quot;look_for_keys&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span>
<span class="ow">and</span> <span class="nb">str</span><span class="p">(</span><span class="n">extra_options</span><span class="p">[</span><span class="s2">&quot;look_for_keys&quot;</span><span class="p">])</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;false&#39;</span>
<span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">look_for_keys</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">if</span> <span class="s2">&quot;disabled_algorithms&quot;</span> <span class="ow">in</span> <span class="n">extra_options</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">disabled_algorithms</span> <span class="o">=</span> <span class="n">extra_options</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;disabled_algorithms&quot;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">host_key</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="n">host_key</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">&quot;ssh-&quot;</span><span class="p">):</span>
<span class="n">key_type</span><span class="p">,</span> <span class="n">host_key</span> <span class="o">=</span> <span class="n">host_key</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="kc">None</span><span class="p">)[:</span><span class="mi">2</span><span class="p">]</span>
<span class="n">key_constructor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_host_key_mappings</span><span class="p">[</span><span class="n">key_type</span><span class="p">[</span><span class="mi">4</span><span class="p">:]]</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">key_constructor</span> <span class="o">=</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">RSAKey</span>
<span class="n">decoded_host_key</span> <span class="o">=</span> <span class="n">decodebytes</span><span class="p">(</span><span class="n">host_key</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">&#39;utf-8&#39;</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host_key</span> <span class="o">=</span> <span class="n">key_constructor</span><span class="p">(</span><span class="n">data</span><span class="o">=</span><span class="n">decoded_host_key</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">no_host_key_check</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s1">&#39;Parameter `timeout` is deprecated.&#39;</span>
<span class="s1">&#39;Please use `conn_timeout` instead.&#39;</span>
<span class="s1">&#39;The old option `timeout` will be removed in a future version.&#39;</span><span class="p">,</span>
<span class="ne">DeprecationWarning</span><span class="p">,</span>
<span class="n">stacklevel</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="k">else</span> <span class="n">TIMEOUT_DEFAULT</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pkey</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_file</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span>
<span class="s2">&quot;Params key_file and private_key both provided. Must provide no more than one.&quot;</span>
<span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">&quot;Missing required param: remote_host&quot;</span><span class="p">)</span>
<span class="c1"># Auto detecting username values from system</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">username</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">debug</span><span class="p">(</span>
<span class="s2">&quot;username to ssh to host: </span><span class="si">%s</span><span class="s2"> is not specified for connection id&quot;</span>
<span class="s2">&quot; </span><span class="si">%s</span><span class="s2">. Using system&#39;s default provided by getpass.getuser()&quot;</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ssh_conn_id</span><span class="p">,</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="o">=</span> <span class="n">getuser</span><span class="p">()</span>
<span class="n">user_ssh_config_filename</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="s1">&#39;~/.ssh/config&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isfile</span><span class="p">(</span><span class="n">user_ssh_config_filename</span><span class="p">):</span>
<span class="n">ssh_conf</span> <span class="o">=</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">SSHConfig</span><span class="p">()</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">user_ssh_config_filename</span><span class="p">)</span> <span class="k">as</span> <span class="n">config_fd</span><span class="p">:</span>
<span class="n">ssh_conf</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">config_fd</span><span class="p">)</span>
<span class="n">host_info</span> <span class="o">=</span> <span class="n">ssh_conf</span><span class="o">.</span><span class="n">lookup</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">)</span>
<span class="k">if</span> <span class="n">host_info</span> <span class="ow">and</span> <span class="n">host_info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;proxycommand&#39;</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host_proxy_cmd</span> <span class="o">=</span> <span class="n">host_info</span><span class="p">[</span><span class="s1">&#39;proxycommand&#39;</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">password</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_file</span><span class="p">):</span>
<span class="k">if</span> <span class="n">host_info</span> <span class="ow">and</span> <span class="n">host_info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;identityfile&#39;</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="o">=</span> <span class="n">host_info</span><span class="p">[</span><span class="s1">&#39;identityfile&#39;</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="ow">or</span> <span class="n">SSH_PORT</span>
<span class="nd">@cached_property</span>
<div class="viewcode-block" id="SSHHook.host_proxy"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.host_proxy">[docs]</a> <span class="k">def</span> <span class="nf">host_proxy</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Optional</span><span class="p">[</span><span class="n">paramiko</span><span class="o">.</span><span class="n">ProxyCommand</span><span class="p">]:</span>
<span class="n">cmd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_proxy_cmd</span>
<span class="k">return</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">ProxyCommand</span><span class="p">(</span><span class="n">cmd</span><span class="p">)</span> <span class="k">if</span> <span class="n">cmd</span> <span class="k">else</span> <span class="kc">None</span></div>
<div class="viewcode-block" id="SSHHook.get_conn"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.get_conn">[docs]</a> <span class="k">def</span> <span class="nf">get_conn</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">SSHClient</span><span class="p">:</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Opens a ssh connection to the remote host.</span>
<span class="sd"> :rtype: paramiko.client.SSHClient</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">&#39;Creating SSH client for conn_id: </span><span class="si">%s</span><span class="s1">&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">ssh_conn_id</span><span class="p">)</span>
<span class="n">client</span> <span class="o">=</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">SSHClient</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">allow_host_key_change</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">warning</span><span class="p">(</span>
<span class="s2">&quot;Remote Identification Change is not verified. &quot;</span>
<span class="s2">&quot;This won&#39;t protect against Man-In-The-Middle attacks&quot;</span>
<span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">client</span><span class="o">.</span><span class="n">load_system_host_keys</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">no_host_key_check</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">warning</span><span class="p">(</span><span class="s2">&quot;No Host Key Verification. This won&#39;t protect against Man-In-The-Middle attacks&quot;</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_key</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">client_host_keys</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="n">get_host_keys</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">==</span> <span class="n">SSH_PORT</span><span class="p">:</span>
<span class="n">client_host_keys</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_key</span><span class="o">.</span><span class="n">get_name</span><span class="p">(),</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_key</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">client_host_keys</span><span class="o">.</span><span class="n">add</span><span class="p">(</span>
<span class="sa">f</span><span class="s2">&quot;[</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="si">}</span><span class="s2">]:</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">port</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_key</span><span class="o">.</span><span class="n">get_name</span><span class="p">(),</span> <span class="bp">self</span><span class="o">.</span><span class="n">host_key</span>
<span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">pass</span> <span class="c1"># will fallback to system host keys if none explicitly specified in conn extra</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">no_host_key_check</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">allow_host_key_change</span><span class="p">:</span>
<span class="c1"># Default is RejectPolicy</span>
<span class="n">client</span><span class="o">.</span><span class="n">set_missing_host_key_policy</span><span class="p">(</span><span class="n">paramiko</span><span class="o">.</span><span class="n">AutoAddPolicy</span><span class="p">())</span>
<span class="n">connect_kwargs</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span>
<span class="n">hostname</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">,</span>
<span class="n">username</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">username</span><span class="p">,</span>
<span class="n">timeout</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">conn_timeout</span><span class="p">,</span>
<span class="n">compress</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">compress</span><span class="p">,</span>
<span class="n">port</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">port</span><span class="p">,</span>
<span class="n">sock</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">host_proxy</span><span class="p">,</span>
<span class="n">look_for_keys</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">look_for_keys</span><span class="p">,</span>
<span class="n">banner_timeout</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">banner_timeout</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">password</span><span class="p">:</span>
<span class="n">password</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">password</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<span class="n">connect_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">password</span><span class="o">=</span><span class="n">password</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pkey</span><span class="p">:</span>
<span class="n">connect_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">pkey</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">pkey</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_file</span><span class="p">:</span>
<span class="n">connect_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">key_filename</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">key_file</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">disabled_algorithms</span><span class="p">:</span>
<span class="n">connect_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">disabled_algorithms</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">disabled_algorithms</span><span class="p">)</span>
<span class="n">log_before_sleep</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">retry_state</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="s2">&quot;Failed to connect. Sleeping before retry attempt </span><span class="si">%d</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">retry_state</span><span class="o">.</span><span class="n">attempt_number</span>
<span class="p">)</span>
<span class="k">for</span> <span class="n">attempt</span> <span class="ow">in</span> <span class="n">Retrying</span><span class="p">(</span>
<span class="n">reraise</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">wait</span><span class="o">=</span><span class="n">wait_fixed</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span> <span class="o">+</span> <span class="n">wait_random</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="p">),</span>
<span class="n">stop</span><span class="o">=</span><span class="n">stop_after_attempt</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span>
<span class="n">before_sleep</span><span class="o">=</span><span class="n">log_before_sleep</span><span class="p">,</span>
<span class="p">):</span>
<span class="k">with</span> <span class="n">attempt</span><span class="p">:</span>
<span class="n">client</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="o">**</span><span class="n">connect_kwargs</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">keepalive_interval</span><span class="p">:</span>
<span class="c1"># MyPy check ignored because &quot;paramiko&quot; isn&#39;t well-typed. The `client.get_transport()` returns</span>
<span class="c1"># type &quot;Optional[Transport]&quot; and item &quot;None&quot; has no attribute &quot;set_keepalive&quot;.</span>
<span class="n">client</span><span class="o">.</span><span class="n">get_transport</span><span class="p">()</span><span class="o">.</span><span class="n">set_keepalive</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">keepalive_interval</span><span class="p">)</span> <span class="c1"># type: ignore[union-attr]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">client</span> <span class="o">=</span> <span class="n">client</span>
<span class="k">return</span> <span class="n">client</span></div>
<div class="viewcode-block" id="SSHHook.__enter__"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.__enter__">[docs]</a> <span class="k">def</span> <span class="fm">__enter__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="s1">&#39;SSHHook&#39;</span><span class="p">:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s1">&#39;The contextmanager of SSHHook is deprecated.&#39;</span>
<span class="s1">&#39;Please use get_conn() as a contextmanager instead.&#39;</span>
<span class="s1">&#39;This method will be removed in Airflow 2.0&#39;</span><span class="p">,</span>
<span class="n">category</span><span class="o">=</span><span class="ne">DeprecationWarning</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span></div>
<div class="viewcode-block" id="SSHHook.__exit__"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.__exit__">[docs]</a> <span class="k">def</span> <span class="fm">__exit__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">exc_type</span><span class="p">,</span> <span class="n">exc_val</span><span class="p">,</span> <span class="n">exc_tb</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">client</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">client</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">client</span> <span class="o">=</span> <span class="kc">None</span></div>
<div class="viewcode-block" id="SSHHook.get_tunnel"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.get_tunnel">[docs]</a> <span class="k">def</span> <span class="nf">get_tunnel</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span> <span class="n">remote_port</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">remote_host</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">&quot;localhost&quot;</span><span class="p">,</span> <span class="n">local_port</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>
<span class="p">)</span> <span class="o">-&gt;</span> <span class="n">SSHTunnelForwarder</span><span class="p">:</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Creates a tunnel between two hosts. Like ssh -L &lt;LOCAL_PORT&gt;:host:&lt;REMOTE_PORT&gt;.</span>
<span class="sd"> :param remote_port: The remote port to create a tunnel to</span>
<span class="sd"> :param remote_host: The remote host to create a tunnel to (default localhost)</span>
<span class="sd"> :param local_port: The local port to attach the tunnel to</span>
<span class="sd"> :return: sshtunnel.SSHTunnelForwarder object</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="n">local_port</span><span class="p">:</span>
<span class="n">local_bind_address</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">int</span><span class="p">],</span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">,</span> <span class="n">local_port</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">local_bind_address</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">,)</span>
<span class="n">tunnel_kwargs</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span>
<span class="n">ssh_port</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">port</span><span class="p">,</span>
<span class="n">ssh_username</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">username</span><span class="p">,</span>
<span class="n">ssh_pkey</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">pkey</span><span class="p">,</span>
<span class="n">ssh_proxy</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">host_proxy</span><span class="p">,</span>
<span class="n">local_bind_address</span><span class="o">=</span><span class="n">local_bind_address</span><span class="p">,</span>
<span class="n">remote_bind_address</span><span class="o">=</span><span class="p">(</span><span class="n">remote_host</span><span class="p">,</span> <span class="n">remote_port</span><span class="p">),</span>
<span class="n">logger</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">password</span><span class="p">:</span>
<span class="n">password</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">password</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
<span class="n">tunnel_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span>
<span class="n">ssh_password</span><span class="o">=</span><span class="n">password</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">tunnel_kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span>
<span class="n">host_pkey_directories</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">client</span> <span class="o">=</span> <span class="n">SSHTunnelForwarder</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">remote_host</span><span class="p">,</span> <span class="o">**</span><span class="n">tunnel_kwargs</span><span class="p">)</span>
<span class="k">return</span> <span class="n">client</span></div>
<div class="viewcode-block" id="SSHHook.create_tunnel"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.create_tunnel">[docs]</a> <span class="k">def</span> <span class="nf">create_tunnel</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span> <span class="n">local_port</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">remote_port</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span> <span class="n">remote_host</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="s2">&quot;localhost&quot;</span>
<span class="p">)</span> <span class="o">-&gt;</span> <span class="n">SSHTunnelForwarder</span><span class="p">:</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Creates tunnel for SSH connection [Deprecated].</span>
<span class="sd"> :param local_port: local port number</span>
<span class="sd"> :param remote_port: remote port number</span>
<span class="sd"> :param remote_host: remote host</span>
<span class="sd"> :return:</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s1">&#39;SSHHook.create_tunnel is deprecated, Please&#39;</span>
<span class="s1">&#39;use get_tunnel() instead. But please note that the&#39;</span>
<span class="s1">&#39;order of the parameters have changed&#39;</span>
<span class="s1">&#39;This method will be removed in Airflow 2.0&#39;</span><span class="p">,</span>
<span class="n">category</span><span class="o">=</span><span class="ne">DeprecationWarning</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_tunnel</span><span class="p">(</span><span class="n">remote_port</span><span class="p">,</span> <span class="n">remote_host</span><span class="p">,</span> <span class="n">local_port</span><span class="p">)</span></div>
<span class="k">def</span> <span class="nf">_pkey_from_private_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">private_key</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">passphrase</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">PKey</span><span class="p">:</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Creates appropriate paramiko key for given private key</span>
<span class="sd"> :param private_key: string containing private key</span>
<span class="sd"> :return: ``paramiko.PKey`` appropriate for given key</span>
<span class="sd"> :raises AirflowException: if key cannot be read</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">private_key</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot;</span><span class="se">\n</span><span class="s2">&quot;</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span> <span class="o">&lt;</span> <span class="mi">2</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Key must have BEGIN and END header/footer on separate lines.&#39;</span><span class="p">)</span>
<span class="k">for</span> <span class="n">pkey_class</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pkey_loaders</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">pkey_class</span><span class="o">.</span><span class="n">from_private_key</span><span class="p">(</span><span class="n">StringIO</span><span class="p">(</span><span class="n">private_key</span><span class="p">),</span> <span class="n">password</span><span class="o">=</span><span class="n">passphrase</span><span class="p">)</span>
<span class="c1"># Test it actually works. If Paramiko loads an openssh generated key, sometimes it will</span>
<span class="c1"># happily load it as the wrong type, only to fail when actually used.</span>
<span class="n">key</span><span class="o">.</span><span class="n">sign_ssh_data</span><span class="p">(</span><span class="sa">b</span><span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">key</span>
<span class="k">except</span> <span class="p">(</span><span class="n">paramiko</span><span class="o">.</span><span class="n">ssh_exception</span><span class="o">.</span><span class="n">SSHException</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">):</span>
<span class="k">continue</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span>
<span class="s1">&#39;Private key provided cannot be read by paramiko.&#39;</span>
<span class="s1">&#39;Ensure key provided is valid for one of the following&#39;</span>
<span class="s1">&#39;key formats: RSA, DSS, ECDSA, or Ed25519&#39;</span>
<span class="p">)</span>
<div class="viewcode-block" id="SSHHook.exec_ssh_client_command"><a class="viewcode-back" href="../../../../../_api/airflow/providers/ssh/hooks/ssh/index.html#airflow.providers.ssh.hooks.ssh.SSHHook.exec_ssh_client_command">[docs]</a> <span class="k">def</span> <span class="nf">exec_ssh_client_command</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span>
<span class="n">ssh_client</span><span class="p">:</span> <span class="n">paramiko</span><span class="o">.</span><span class="n">SSHClient</span><span class="p">,</span>
<span class="n">command</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span>
<span class="n">get_pty</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span>
<span class="n">environment</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span><span class="p">],</span>
<span class="n">timeout</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">],</span>
<span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">bytes</span><span class="p">,</span> <span class="nb">bytes</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="s2">&quot;Running command: </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span>
<span class="c1"># set timeout taken as params</span>
<span class="n">stdin</span><span class="p">,</span> <span class="n">stdout</span><span class="p">,</span> <span class="n">stderr</span> <span class="o">=</span> <span class="n">ssh_client</span><span class="o">.</span><span class="n">exec_command</span><span class="p">(</span>
<span class="n">command</span><span class="o">=</span><span class="n">command</span><span class="p">,</span>
<span class="n">get_pty</span><span class="o">=</span><span class="n">get_pty</span><span class="p">,</span>
<span class="n">timeout</span><span class="o">=</span><span class="n">timeout</span><span class="p">,</span>
<span class="n">environment</span><span class="o">=</span><span class="n">environment</span><span class="p">,</span>
<span class="p">)</span>
<span class="c1"># get channels</span>
<span class="n">channel</span> <span class="o">=</span> <span class="n">stdout</span><span class="o">.</span><span class="n">channel</span>
<span class="c1"># closing stdin</span>
<span class="n">stdin</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">channel</span><span class="o">.</span><span class="n">shutdown_write</span><span class="p">()</span>
<span class="n">agg_stdout</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">&#39;&#39;</span>
<span class="n">agg_stderr</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">&#39;&#39;</span>
<span class="c1"># capture any initial output in case channel is closed already</span>
<span class="n">stdout_buffer_length</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">in_buffer</span><span class="p">)</span>
<span class="k">if</span> <span class="n">stdout_buffer_length</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">agg_stdout</span> <span class="o">+=</span> <span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv</span><span class="p">(</span><span class="n">stdout_buffer_length</span><span class="p">)</span>
<span class="c1"># read from both stdout and stderr</span>
<span class="k">while</span> <span class="ow">not</span> <span class="n">channel</span><span class="o">.</span><span class="n">closed</span> <span class="ow">or</span> <span class="n">channel</span><span class="o">.</span><span class="n">recv_ready</span><span class="p">()</span> <span class="ow">or</span> <span class="n">channel</span><span class="o">.</span><span class="n">recv_stderr_ready</span><span class="p">():</span>
<span class="n">readq</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">select</span><span class="p">([</span><span class="n">channel</span><span class="p">],</span> <span class="p">[],</span> <span class="p">[],</span> <span class="n">timeout</span><span class="p">)</span>
<span class="k">for</span> <span class="n">recv</span> <span class="ow">in</span> <span class="n">readq</span><span class="p">:</span>
<span class="k">if</span> <span class="n">recv</span><span class="o">.</span><span class="n">recv_ready</span><span class="p">():</span>
<span class="n">line</span> <span class="o">=</span> <span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">recv</span><span class="o">.</span><span class="n">in_buffer</span><span class="p">))</span>
<span class="n">agg_stdout</span> <span class="o">+=</span> <span class="n">line</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="n">line</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">&#39;utf-8&#39;</span><span class="p">,</span> <span class="s1">&#39;replace&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">strip</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">))</span>
<span class="k">if</span> <span class="n">recv</span><span class="o">.</span><span class="n">recv_stderr_ready</span><span class="p">():</span>
<span class="n">line</span> <span class="o">=</span> <span class="n">stderr</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv_stderr</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">recv</span><span class="o">.</span><span class="n">in_stderr_buffer</span><span class="p">))</span>
<span class="n">agg_stderr</span> <span class="o">+=</span> <span class="n">line</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="n">line</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">&#39;utf-8&#39;</span><span class="p">,</span> <span class="s1">&#39;replace&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">strip</span><span class="p">(</span><span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">))</span>
<span class="k">if</span> <span class="p">(</span>
<span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">exit_status_ready</span><span class="p">()</span>
<span class="ow">and</span> <span class="ow">not</span> <span class="n">stderr</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv_stderr_ready</span><span class="p">()</span>
<span class="ow">and</span> <span class="ow">not</span> <span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv_ready</span><span class="p">()</span>
<span class="p">):</span>
<span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">shutdown_read</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span>
<span class="c1"># there is a race that when shutdown_read has been called and when</span>
<span class="c1"># you try to close the connection, the socket is already closed</span>
<span class="c1"># We should ignore such errors (but we should log them with warning)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">&quot;Ignoring exception on close&quot;</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">break</span>
<span class="n">stdout</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">stderr</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">exit_status</span> <span class="o">=</span> <span class="n">stdout</span><span class="o">.</span><span class="n">channel</span><span class="o">.</span><span class="n">recv_exit_status</span><span class="p">()</span>
<span class="k">return</span> <span class="n">exit_status</span><span class="p">,</span> <span class="n">agg_stdout</span><span class="p">,</span> <span class="n">agg_stderr</span></div></div>
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