nginx-vts-exporter

Simple server that scrapes Nginx vts stats and exports them via HTTP for Prometheus consumption

Table of Contents

• Dependency
• Download
• Compile
  • build binary
  • build docker image
• Run
  • run binary
  • run docker image
• Environment variables
• Metrics
  • Server main
  • Server zones
  • Upstreams

Dependency

• nginx-module-vts
• Prometheus
• Golang

Download

Binary can be downloaded from Releases page.

Compile

build binary

make

build docker image

make docker

Docker Hub Image

docker pull sophos/nginx-vts-exporter:latest

It can be used directly instead of having to build the image yourself. (Docker Hub sophos/nginx-vts-exporter)

Run

run binary

nohup /bin/nginx-vts-exporter -nginx.scrape_uri=http://localhost/status/format/json

run docker

docker run  -ti --rm --env NGINX_STATUS="http://localhost/status/format/json" sophos/nginx-vts-exporter

Environment variables

This image is configurable using different env variables

Variable name	Default	Description
NGINX_STATUS	http://localhost/status/format/json	Nginx JSON format status page
METRICS_ENDPOINT	/metrics	Metrics endpoint exportation URI
METRICS_ADDR	:9913	Metrics exportation address:port
METRICS_NS	nginx	Prometheus metrics Namespaces

Metrics

Documents about exposed Prometheus metrics.

For details on the underlying metrics please see nginx-module-vts

For grafana dashboard please see nginx-vts-exporter dashboard

Server main

Metrics details

Nginx data	Name	Exposed informations
Connections	{NAMESPACE}_server_connections	status [active, reading, writing, waiting, accepted, handled]

Metrics output example

# Server Connections
nginx_server_connections{status="accepted"} 70606

Server zones

Metrics details

Nginx data	Name	Exposed informations
Requests	{NAMESPACE}_server_requests	code [2xx, 3xx, 4xx, 5xx, total], host (or domain name)
Bytes	{NAMESPACE}_server_bytes	direction [in, out], host (or domain name)
Cache	{NAMESPACE}_server_cache	status [bypass, expired, hit, miss, revalidated, scarce, stale, updating], host (or domain name)

Metrics output example

# Server Requests
nginx_server_requests{code="1xx",host="test.domain.com"} 0

# Server Bytes
nginx_server_bytes{direction="in",host="test.domain.com"} 21

# Server Cache
nginx_server_cache{host="test.domain.com",status="bypass"} 2

Upstreams

Metrics details

Nginx data	Name	Exposed informations
Requests	{NAMESPACE}_upstream_requests	code [2xx, 3xx, 4xx, 5xx and total], upstream (or upstream name)
Bytes	{NAMESPACE}_upstream_bytes	direction [in, out], upstream (or upstream name)
Response time	{NAMESPACE}_upstream_response	backend (or server), in_bytes, out_bytes, upstream (or upstream name)

Metrics output example

# Upstream Requests
nginx_upstream_requests{code="1xx",upstream="XXX-XXXXX-3000"} 0

# Upstream Bytes
nginx_upstream_bytes{direction="in",upstream="XXX-XXXXX-3000"} 0

# Upstream Response time
nginx_upstream_response{backend="10.2.15.10:3000",upstream="XXX-XXXXX-3000"} 99