nginx-prometheus-shiny-exporter
Description
This application collects custom formatted log from nginx via Syslog, counts all the data and exports metrics to Prometheus server.
┌───────┐ ┌─────────────────────────────────┐
│ nginx │───[ syslog/UDP ]───▸│ nginx-prometheus-shiny-exporter │
└───────┘ └─────────────────────────────────┘
▴
║
[ HTTP ]
║
▾
┌────────────┐
│ Prometheus │
└────────────┘
It works similar to nginx_request_exporter but written in Crystal.
Status
master
branch contains a production ready version. It is able to return a limited number of metrics. More ones will be added in future.
I use this application on Russian National Platform for Open Education https://openedu.ru
Installation
- Install Crystal
apt install build-essential pkg-config zlib1g-dev libssl-dev
make build
Usage
Create a virtual host:
log_format collect_status 'stts|$host|$status';
log_format collect_time 'reqt|$host|$request_time';
map $request_uri $is_not_static {
default 1;
"~^/media/" 0;
"~^/static/" 0;
}
server {
listen 127.0.0.1:8877 default_server;
access_log syslog:server=127.0.0.1:9467,tag=default collect_status;
access_log syslog:server=127.0.0.1:9467,tag=default collect_time;
access_log syslog:server=127.0.0.1:9467,tag=app collect_status if=$is_not_static;
access_log syslog:server=127.0.0.1:9467,tag=app collect_time if=$is_not_static;
location / {
# …
}
location /special/ {
access_log syslog:server=127.0.0.1:9467,tag=special collect_status;
access_log syslog:server=127.0.0.1:9467,tag=special collect_time;
# …
}
}
Do several requests and check the metrics:
$ curl -s http://localhost:9467/metrics
# HELP nginx_request_status A metric
# TYPE nginx_request_status counter
nginx_request_status{host="127.0.0.1",tag="default",status="404"} 2
nginx_request_status{host="127.0.0.1",tag="default",status="499"} 3
nginx_request_status{host="127.0.0.1",tag="default",status="503"} 2
nginx_request_status{host="127.0.0.1",tag="default",status="204"} 1
nginx_request_status_ranges{host="127.0.0.1",tag="default",range="100-399"} 1
nginx_request_status_ranges{host="127.0.0.1",tag="default",range="400-498"} 2
nginx_request_status_ranges{host="127.0.0.1",tag="default",range="499"} 3
nginx_request_status_ranges{host="127.0.0.1",tag="default",range="500-599"} 2
# HELP nginx_request_time A metric
# TYPE nginx_request_time counter
nginx_request_time_sum{host="127.0.0.1",tag="default"} 0.0
nginx_request_time_count{host="127.0.0.1",tag="default"} 8
Add to prometheus a block like this:
scrape_configs:
- job_name: nginx
scrape_interval: 5s
scrape_timeout: 5s
static_configs:
- targets:
- 192.0.2.8:9467
If you use Grafana, a sample dashboard can be found in contrib/
directory of the project.
FAQ
Q: Why shiny?
A: Because it is writen in Crystal
nginx-prometheus-shiny-exporter
- 6
- 1
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- 1
- almost 6 years ago
- July 31, 2018
MIT License
Sat, 23 Nov 2024 21:55:55 GMT