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| <div class="section" id="ssh-connection"> |
| <h1>SSH Connection<a class="headerlink" href="#ssh-connection" title="Permalink to this headline">¶</a></h1> |
| <p>The SSH connection type provides connection to use <a class="reference internal" href="../../_api/airflow/contrib/hooks/ssh_hook/index.html#airflow.contrib.hooks.ssh_hook.SSHHook" title="airflow.contrib.hooks.ssh_hook.SSHHook"><code class="xref py py-class docutils literal notranslate"><span class="pre">SSHHook</span></code></a> to run commands on a remote server using <a class="reference internal" href="../../_api/airflow/contrib/operators/ssh_operator/index.html#airflow.contrib.operators.ssh_operator.SSHOperator" title="airflow.contrib.operators.ssh_operator.SSHOperator"><code class="xref py py-class docutils literal notranslate"><span class="pre">SSHOperator</span></code></a> or transfer file from/to the remote server using <code class="xref py py-class docutils literal notranslate"><span class="pre">SFTPOperator</span></code>.</p> |
| <div class="section" id="configuring-the-connection"> |
| <h2>Configuring the Connection<a class="headerlink" href="#configuring-the-connection" title="Permalink to this headline">¶</a></h2> |
| <dl> |
| <dt>Host (required)</dt><dd><p>The Remote host to connect.</p> |
| </dd> |
| <dt>Username (optional)</dt><dd><p>The Username to connect to the remote_host.</p> |
| </dd> |
| <dt>Password (optional)</dt><dd><p>Specify the password of the username to connect to the remote_host.</p> |
| </dd> |
| <dt>Port (optional)</dt><dd><p>Port of remote host to connect. Default is 22.</p> |
| </dd> |
| <dt>Extra (optional)</dt><dd><p>Specify the extra parameters (as json dictionary) that can be used in ssh |
| connection. The following parameters out of the standard python parameters |
| are supported:</p> |
| <ul class="simple"> |
| <li><p><strong>key_file</strong> - Full Path of the private SSH Key file that will be used to connect to the remote_host.</p></li> |
| <li><p><strong>private_key</strong> - Content of the private key used to connect to the remote_host.</p></li> |
| <li><p><strong>timeout</strong> - An optional timeout (in seconds) for the TCP connect. Default is <code class="docutils literal notranslate"><span class="pre">10</span></code>.</p></li> |
| <li><p><strong>compress</strong> - <code class="docutils literal notranslate"><span class="pre">true</span></code> to ask the remote client/server to compress traffic; <code class="docutils literal notranslate"><span class="pre">false</span></code> to refuse compression. Default is <code class="docutils literal notranslate"><span class="pre">true</span></code>.</p></li> |
| <li><p><strong>no_host_key_check</strong> - Set to <code class="docutils literal notranslate"><span class="pre">false</span></code> to restrict connecting to hosts with no entries in <code class="docutils literal notranslate"><span class="pre">~/.ssh/known_hosts</span></code> (Hosts file). This provides maximum protection against trojan horse attacks, but can be troublesome when the <code class="docutils literal notranslate"><span class="pre">/etc/ssh/ssh_known_hosts</span></code> file is poorly maintained or connections to new hosts are frequently made. This option forces the user to manually add all new hosts. Default is <code class="docutils literal notranslate"><span class="pre">true</span></code>, ssh will automatically add new host keys to the user known hosts files.</p></li> |
| <li><p><strong>allow_host_key_change</strong> - Set to <code class="docutils literal notranslate"><span class="pre">true</span></code> if you want to allow connecting to hosts that has host key changed or when you get ‘REMOTE HOST IDENTIFICATION HAS CHANGED’ error. This wont protect against Man-In-The-Middle attacks. Other possible solution is to remove the host entry from <code class="docutils literal notranslate"><span class="pre">~/.ssh/known_hosts</span></code> file. Default is <code class="docutils literal notranslate"><span class="pre">false</span></code>.</p></li> |
| </ul> |
| <p>Example “extras” field:</p> |
| <div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span> |
| <span class="nt">"key_file"</span><span class="p">:</span> <span class="s2">"/home/airflow/.ssh/id_rsa"</span><span class="p">,</span> |
| <span class="nt">"timeout"</span><span class="p">:</span> <span class="s2">"10"</span><span class="p">,</span> |
| <span class="nt">"compress"</span><span class="p">:</span> <span class="s2">"false"</span><span class="p">,</span> |
| <span class="nt">"no_host_key_check"</span><span class="p">:</span> <span class="s2">"false"</span><span class="p">,</span> |
| <span class="nt">"allow_host_key_change"</span><span class="p">:</span> <span class="s2">"false"</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>When specifying the connection as URI (in AIRFLOW_CONN_* variable) you should specify it |
| following the standard syntax of connections, where extras are passed as parameters |
| of the URI (note that all components of the URI should be URL-encoded).</p> |
| <p>Example connection string with <code class="docutils literal notranslate"><span class="pre">key_file</span></code> (path to key file provided in connection):</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>ssh://user:pass@localhost:22?timeout<span class="o">=</span><span class="m">10</span><span class="p">&</span><span class="nv">compress</span><span class="o">=</span>false<span class="p">&</span><span class="nv">no_host_key_check</span><span class="o">=</span>false<span class="p">&</span><span class="nv">allow_host_key_change</span><span class="o">=</span>true<span class="p">&</span><span class="nv">key_file</span><span class="o">=</span>%2Fhome%2Fairflow%2F.ssh%2Fid_rsa |
| </pre></div> |
| </div> |
| <p>Example connection string with <code class="docutils literal notranslate"><span class="pre">private_key</span></code> (actual private key provided in connection):</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nb">export</span> <span class="nv">AIRFLOW_CONN_SSH_SERVER</span><span class="o">=</span><span class="s1">'SSH://127.0.0.1?private_key=-----BEGIN+RSA+PRIVATE+KEY-----%0AMIIEpAIBAAKCAQEAvYUM9xouSUtCKMwm%2FkogT4r3Y%2Bh7H0IPnd7DF9sKCHt9FPJ%2B%0ALaQNX%2FRgnOoPf5ySN42A1nmqv4WX5AKdjEYMIJzN2g2whnol8RVjzP4s2Ao%2B%2BWJ9%0AKstey85CQUgjWFO57ye3TyhbfMZI3fBqDX5RjgkgAZmUpKmv6ttSiCfdgGxLweD7%0ADZexlAjuSfr7i0UZWBIbSKJdePMnWGvZZO%2BGerGlOIKs%2Bqx5agMbNJqDhWn0u8OV%0ACMANhc0yaUAbN08Pjac94%2FxmZPHASytrBmTGd6zYcuzOyxwK8KHMeLUagByT3u7l%0AvWcVyRx8FAXkl7nGF2SQZ0z3JLhmdWMSXuc1AQIDAQABAoIBAQC8%2Bp1REVQyVc8k%0A612%2Bl5%2FccU%2F62elb4%2F26iFS1xv8cMjcp2hwj2sBTfFWSYnsN3syWhI2CUFQJImex%0AP0Jmi7qwEmvaEWiCz%2B5hldisoo%2BI5b6h4qm5MI3YYFYEzrAf9W0kos%2FRKQcBRp%2BG%0AX6MAzYL5RPQbZE%2BqWmJGqGiFyGrBEISl%2FMdoaqSJewTRLHwDtbD9lt4WRPUO%2Font%0A%2FUKwOu3i9z5hMQm9HJJLuKr3hl5jmjJbJUg50a7fjVJzr52VfxH73Z%2Fst40fD3x4%0AH1DHGbX4ar9JOYvhzdXkuxyNXvoglJUIOiAk23Od8q9xOMQAITuwkc1QaVRXwiE7%0Aw41lMC8ZAoGBAOB9PEFyzGwYZgiReOQsAJrlwT7zsY053OGSXAeoLC2OzyLNb8v7%0AnKy2qoTMwxe9LHUDDAp6I8btprvLq35Y72iCbGg0ZK5fIYv%2Bt03NjvOOl1zEuUny%0A5xGe1IvP4YgMQuVMVw5dj11Jmna5eW3oFXlyOQrlth9hrexuI%2BG25qwvAoGBANgf%0AOhy%2FofyIgrIGwaRbgg55rlqViLNGFcJ6I3dVlsRqFxND4PvQZZWfCN3LhIGgI8cT%0AN6hFGPR9QrsmXe3eHM7%2FUpMk53oiPD9E0MemPtQh2AFPUb%2BznqxrXNGvtww6xYBM%0AKYLXcQVn%2FKELwwMYw3F0HGKgCFF0XthV34f%2Bt%2FXPAoGBALVLjqEQlBTsM2LSEP68%0AppRx3nn3lrmGNGMbryUj5OG6BoCFxrbG8gXt05JCR4Bhb4jkOBIyB7i87r2VQ19b%0AdaVCR0h0n6bO%2FymvQNwdmUgLLSRnX3hgKcpqKh7reKlFtbS2zUu1tXVSXuNo8K8Z%0AElatL3Ikh8uaODrLzECaVHpTAoGAXcReoC58h2Zq3faUeUzChqlAfki2gKF9u1zm%0AmlXmDd3BmTgwGtD14g6X%2BDLekKb8Htk1oqooA5t9IlmpExT1BtI7719pltHXtdOT%0AiauVQtBUOW1CmJvD0ibapJdKIeI14k4pDH2QqbnOH8lMmMFbupOX5SptsXl91Pqc%0A%2BxIGmn0CgYBOL2o0Sn%2F8d7uzAZKUBG1%2F0eFr4j6wYwWajVDFOfbJ7WdIf5j%2BL3nY%0A3440i%2Fb2NlEE8nLPDl6cwiOtwV0XFkoiF3ctHvutlhGBxAKHetIxIsnQk7vXqgfP%0AnhsgNypNAQXbxe3gjJEb4Fzw3Ufz3mq5PllYtXKhc%2Bmc4%2B3sN5uGow%3D%3D%0A-----END+RSA+PRIVATE+KEY-----%0A'</span> |
| </pre></div> |
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