Apache Exporter for Prometheus

Exports apache mod_status statistics via HTTP for Prometheus consumption.

An update of the apache_exporter script from https://github.com/neezgee/apache_exporter to work with the latest Prometheus go-lang API (as at October 2016 - 1.3beta).

Building

Checkout to a local directory:

git clone https://github.com/craigmj/apache_exporter.git

cd into the directory and, with an installed version of golang (https://golang.org):

cd apache_exporter
./build.sh

You should now have a working bin/apache_exporter

Installation (systemd)

Once the binary is built, you need to auto-start it on your box.

With my apache_exporter checked out to /opt/apache_exporter, create this systemd unit script in /lib/systemd/system/apache_exporter.service

[Unit]
Description=apache_exporter exports apache stats to prometheus
[Install]
WantedBy=multi-user.target
[Service]
Type=simple
ExecStart=/opt/apache_exporter/bin/apache_exporter

Start apache_exporter:

sudo systemctl daemon-reload
sudo systemctl enable apache_exporter.service
sudo systemctl start apache_exporter.service

Check on it:

sudo systemctl status apache_exporter.service

Installation (prometheus)

I add this to the scrape_configs section of my prometheus.yml file:

- job_name: "apache"
  scrape_interval: "15s"
  static_configs:
  - targets: ['localhost:9117']

(see prometheus.yml for my example prometheus.yml file)

Installation (original article)

The original code suggested:

"With working golang environment it can be built with go get. There is a good article with build HOWTO and usage example."

Note, though, that the prometheus config described on this link does not work with the latest (as at October 2016) version of prometheus (1.3beta).

Help on flags:

  -insecure
    	Ignore server certificate if using https (default false)
  -log.level value
    	Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal, panic]. (default info)
  -scrape_uri string
    	URI to apache stub status page (default "http://localhost/server-status/?auto")
  -telemetry.address string
    	Address on which to expose metrics. (default ":9117")
  -telemetry.endpoint string
    	Path under which to expose metrics. (default "/metrics")

Tested on Apache 2.2 and Apache 2.4.