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PORun python script as daemon at boot time (Ubuntu)
 

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  1. PORun python script as daemon at boot time (Ubuntu)
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    <p>I've created small web server using werkzeug and I'm able to run it in usual python way with <code>python my_server.py</code>. Pages load, everything works fine. Now I want to start it when my pc boots. What's the easiest way to do that? I've been struggling with upstart but it doesn't seem to "live in a background" cuz after I execute <code>start my_server</code> I immediately receive <code>kernel: [ 8799.793942] init: my_server main process (7274) terminated with status 1</code></p> <p>my_server.py:</p> <pre><code>... if __name__ == '__main__': from werkzeug.serving import run_simple app = create_app() run_simple('0.0.0.0', 4000, app) </code></pre> <p>upstart configuration file my_server.conf:</p> <pre><code>description "My service" author "Some Dude &lt;blah@foo.com&gt;" start on runlevel [2345] stop on runlevel [016] exec /path/to/my_server.py start on startup </code></pre> <p>Any Ideas how to make it work? Or any other better way to daemonize the script?</p> <p><strong>Update:</strong> I believe the problem lies within <code>my_server.py</code>. It doesn't seem to initiate the webserver (method <code>run_simple()</code>) in the first place. What steps should be taken to make .py file be run by task handler such as upstart?</p> <ul> <li>Place shebang as first line <code>#!/usr/bin/env python</code></li> <li>Allow execution permissions <code>chmod 755</code></li> <li>Start the daemon with superuser rights (to be absolutely sure no permission restrictions prevents it from starting)</li> <li>Make sure all python libraries are there!</li> <li><em>Something else?</em></li> </ul> <p><strong>Solved:</strong> The problem was with missing python dependencies. When starting the script through task manager (e.g. <code>upstart</code> or <code>start-stop-daemon</code>) no errors are thrown. Need to be absolutely sure that pythonpath contains everything you need.</p>
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    1. COTry runlevels 235 and form which user you run server you use 4000 priviliged ports which requires admin's rigths.
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    2. COI run it as superuser and changing runlevel to 235 didn't help.
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    3. COIs it possible that dependency services of your app is not yet started? like some database?
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