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    <p>A scalable pure-logging approach (as in using only system logging components) can be implemented using <a href="http://www.balabit.com/network-security/syslog-ng" rel="nofollow">syslog-ng</a></p> <p>syslog-ng is syslog++, so it will not break any syslog configurations and logging if you already have some. Installation on Ubuntu is straightforward:</p> <pre><code>sudo apt-get install syslog-ng </code></pre> <p>for installation on windows, refer:<a href="http://www.syslog.org/logged/running-syslog-ng-on-windows/" rel="nofollow">http://www.syslog.org/logged/running-syslog-ng-on-windows/</a></p> <p>Multiple django applications or multiple servers log to syslog-ng which uses UDP or TCP (depending on your configuration) to send it to a central syslog-ng server which logs it on that machine. You can use a basic regex to identify the application in syslog-ng and route it accordingly.</p> <p><strong>Django logging configuration</strong></p> <pre><code>'syslog-verbose': { 'format': 'myapp %(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s' } 'ConcurrentLogHandler':{ 'level': 'DEBUG', 'class': 'logging.handlers.SysLogHandler', 'formatter': 'syslog-verbose', }, </code></pre> <p>Note the "myapp" string added to the formatter to identify the application by syslog-ng.</p> <p>You can even configure nginx, apache and other servers to log to syslog-ng. E.g. for apache:</p> <pre><code>CustomLog "| /usr/bin/logger -t 'apache' -u /var/run/apache_access_log.socket" combined </code></pre> <p><strong>Syslog-ng client configuration</strong></p> <p>Append this to the end of /etc/syslog-ng/syslog-ng.conf</p> <pre><code>filter filter_loghostclient { program("^myapp$"); }; destination dest_loghostclient { tcp("destination_logserver.example.com" port (514)); }; log { source(s_all); filter(filter_loghostclient); destination(dest_loghostclient); }; source s_apache_access { #apache access logs getting written directly to a socket (as described above) unix-stream("/var/run/apache_access_log.socket" max-connections(512) keep-alive(yes)); }; log{ source(s_apache_access); destination(dest_loghostclient); }; filter f_apache_err { #Apache error logs program("apache") and level(err); }; log{ source(s_all); filter(f_apache_err); destination(dest_loghostclient); }; </code></pre> <p><strong>Syslog-ng aggregator configuration</strong></p> <p>Append the following to the syslog-ng config file on destination_logserver.example.com</p> <pre><code>source src_loghostserver { tcp(port(514) keep-alive(yes) max_connections(1000)); }; destination dest_loghostserver { file("/var/log/myproject/request_\$R_YEAR\$R_MONTH\$R_DAY.log"); }; log { source(src_loghostserver); destination(dest_loghostserver); }; </code></pre>
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