Nginx Request Exporter for Prometheus

This is a Prometheus exporter for Nginx requests.

In contrast to existing exporters nginx_request_exporter does not scrape the stub status module for server status but records statistics for HTTP requests.

By default nginx_request_exporter listens on port 9147 for HTTP requests.

Installation

Using go get

go get github.com/markuslindenberg/nginx_request_exporter

Using Docker

docker pull markuslindenberg/nginx_request_exporter
docker run --rm -p 9147:9147 -p 9514:9514/udp markuslindenberg/nginx_request_exporter

Configuration

nginx_request_exporter consumes access log records using the syslog protocol. Nginx needs to be configured to log to nginx_request_exporter's syslog port. To enable syslog logging add a access_log statement to your Nginx configuration:

access_log syslog:server=127.0.0.1:9514 prometheus;

Log format

nginx_request_exporter uses a custom log format that needs to be defined in the http context.

The format has to only include key/value pairs:

• A key/value pair delimited by a colon denotes a metric name&value
• A key/value pair delimited by a equal sign denotes a label name&value that is added to all metrics.

Example:

log_format prometheus 'time:$request_time status=$status host="$host" method="$request_method" upstream="$upstream_addr"';

Multiple metrics can be recorded and all variables available in Nginx can be used. Currently nginx_request_exporter has to be restarted when the log format is changed.