HAProxy Exporter for Prometheus (fork)

This is a simple server that scrapes HAProxy stats and exports them via HTTP for Prometheus consumption.

Note: since HAProxy 2.0.0, the official source includes a Prometheus exporter module that can be built into your binary with a single flag during build time and offers an exporter-free Prometheus endpoint. More information down below.

Getting Started

To run it:

./haproxy_exporter [flags]

Help on flags:

./haproxy_exporter --help

For more information check the source code documentation. All of the core developers are accessible via the Prometheus Developers mailinglist.

Usage

HTTP stats URL

Specify custom URLs for the HAProxy stats port using the --haproxy.scrape-uri flag. For example, if you have set stats uri /baz,

haproxy_exporter --haproxy.scrape-uri="http://localhost:5000/baz?stats;csv"

Or to scrape a remote host:

haproxy_exporter --haproxy.scrape-uri="http://haproxy.example.com/haproxy?stats;csv"

Note that the ;csv is mandatory (and needs to be quoted).

If your stats port is protected by basic auth, add the credentials to the scrape URL:

haproxy_exporter  --haproxy.scrape-uri="http://user:pass@haproxy.example.com/haproxy?stats;csv"

You can also scrape HTTPS URLs. Certificate validation is enabled by default, but you can disable it using the --haproxy.ssl-verify=false flag:

haproxy_exporter --no-haproxy.ssl-verify --haproxy.scrape-uri="https://haproxy.example.com/haproxy?stats;csv"

Unix Sockets

As alternative to localhost HTTP a stats socket can be used. Enable the stats socket in HAProxy with for example:

stats socket /run/haproxy/admin.sock mode 660 level admin

The scrape URL uses the 'unix:' scheme:

haproxy_exporter --haproxy.scrape-uri=unix:/run/haproxy/admin.sock

The scrape URL uses the 'unix:' scheme with nbproc > 1 :

haproxy_exporter  --haproxy.scrape-uri=unix:/var/lib/haproxy/stats --web.listen-address=0.0.0.0:10001 --haproxy.nbproc=3

where /var/lib/haproxy/stats is mask for sockets, app will use /var/lib/haproxy/stats1, /var/lib/haproxy/stats2, /var/lib/haproxy/stats3 files for nbproc=3 and so on

Docker

To run the haproxy exporter as a Docker container, run:

docker run -p 9101:9101 quay.io/prometheus/haproxy-exporter:v0.9.0 --haproxy.scrape-uri="http://user:pass@haproxy.example.com/haproxy?stats;csv"

Development

Building

make build

Testing

make test

License

Apache License 2.0, see LICENSE.

Alternatives

Official Prometheus exporter

As of 2.0.0, HAProxy includes a Prometheus exporter module that can be built into your binary during build time.

To build with the official Prometheus exporter module, make with the following EXTRA_OBJS flag:

make TARGET=linux-glibc EXTRA_OBJS="contrib/prometheus-exporter/service-prometheus.o"

Once built, you can enable and configure the Prometheus endpoint from your haproxy.cfg file as a typical frontend:

frontend stats
    bind *:8404
    http-request use-service prometheus-exporter if { path /metrics }
    stats enable
    stats uri /stats
    stats refresh 10s

For more infromation, see this official blog post.