NGINX access logs are defined using the log_format directive. Background – Quick Overview of NGINX Access Log Configuration For ease of reading, we’ll refer to NGINX throughout. In this article, we show how to selectively log transactions based on various criteria, and how to use that knowledge to sample data points about requests in a quick and lightweight way.Įxcept as noted, this post applies to both NGINX Open Source and NGINX Plus. This might be necessary for compliance or security purposes, but for a busy website, the volume of data generated can be overwhelming. Such logs are known as access logs, and you can fine‑tune the detail that is recorded for different services or locations with a customizable log‑file format.īy default, NGINX logs every transaction it processes. error_log /var/In case of an error, the message is written to only one error log, the one closest to the level where the error has appeared.NGINX can record a very detailed log of every transaction it processes.
In the next example, messages of crit, alert, and emerg levels will be logged. This will instruct Nginx to log all messages of type warn and more severe log level crit, alert, and emerg messages. You can configure error logging using the following syntax: error_log /path/to/log_file log_level įor example: error_log /var/log/nginx/error_log warn and configurations in the lower levels override the configurations inherited from the higher levels.Configurations in the main context are always inherited by lower levels in the order above.The error_log directive is used to specify the log file, and it can be used in the main, http, mail, stream, server, location context (in that order). The default log file is log/error.log, but it is normally located in /var/log/nginx/ on Linux distributions. These issues fall under different severity levels: debug, info, notice, warn, error (this is the default level and works globally), crit, alert, or emerg. In case Nginx experiences any glitches, it records information concerning them in the error log. The following are more advanced logging configurations examples, which are useful for log formats that contain compression-related variables and for creating compressed log files: access_log /var/log/nginx/custom_log custom buffer 32k access_log /path/to/log.gz compression gzip flush=5m Configuring Error Logs in Nginx
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