Nginx – How to configure Python Script to run as a daemon

daemonnginxUbuntu

I have a couple webservers sitting behind a loadbalancer, and i found "watcher.py" here: https://github.com/splitbrain/Watcher

I chose this script for several reasons: recursive through folders, lots of triggering options

Anyways, I will be using this to sync web content between load balanced servers. Is there a way to ensure that this script will run at bootup?

Best Answer

I've found the easiest way to handle applications like this is to install supervisord and then use that to start, monitor, and collect output from the your script.

Here's a sample supervisor config file:

[program:watcher]
command = /usr/bin/python /path/to/watcher.py
stdout_logfile = /var/log/watcher-stdout.log
stdout_logfile_maxbytes = 10MB
stdout_logfile_backups = 5
stderr_logfile = /var/log/watcher-stderr.log
stderr_logfile_maxbytes = 10MB
stderr_logfile_backups = 5

Correct way in new versions of nginx

Turn out my first answer to this question was correct at certain time, but it turned into another pitfall - to stay up to date please check Taxing rewrite pitfalls

I have been corrected by many SE users, so the credit goes to them, but more importantly, here is the correct code:

server {
       listen         80;
       server_name    my.domain.com;
       return         301 https://$server_name$request_uri;
}

server {
       listen         443 ssl;
       server_name    my.domain.com;
       # add Strict-Transport-Security to prevent man in the middle attacks
       add_header Strict-Transport-Security "max-age=31536000" always; 

       [....]
}

Ubuntu – console-kit-daemon – can it be stopped

ConsoleKit manages console logins in graphical mode (i.e. with gdm or equivalent); if your server doesn't have those, you don't need it, but then it won't be started anyway. Also, you may be interested in this question.

But you don't really have 60 instances taking 20% of RAM each. The ConsoleKit daemon is multithreaded, and htop shows a separate line for each thread. It's really one process and there's a single copy of that memory; you can confirm that with ps wwu -C console-kit-daemon.

Additionally, the memory usage shown by htop includes code memory, some of which is likely to be shared with other processes using the same dynamic libraries.

Best Answer

Related Solutions

NGINX Redirect – How to Rewrite All HTTP Requests to HTTPS While Maintaining Sub-Domain

Correct way in new versions of nginx

Ubuntu – console-kit-daemon – can it be stopped

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