# Nginx Virtual Host Traffic Input Plugin

This plugin gathers metrics from the [Nginx web server][nginx] using the
[external virtual host traffic status module][vhts_module]. This module provides
access to virtual host status information containing the current status of
servers, upstreams and caches, similar to the live activity monitoring of
Nginx plus. For module configuration details please see the
[module documentation][module_doc].

⭐ Telegraf v1.9.0
🏷️ server, web
💻 all

[nginx]: https://www.nginx.com
[vhts_module]: https://github.com/vozlt/nginx-module-vts
[module_doc]: https://github.com/vozlt/nginx-module-vts#synopsis

## Global configuration options <!-- @/docs/includes/plugin_config.md -->

Plugins support additional global and plugin configuration settings for tasks
such as modifying metrics, tags, and fields, creating aliases, and configuring
plugin ordering. See [CONFIGURATION.md][CONFIGURATION.md] for more details.

[CONFIGURATION.md]: ../../../docs/CONFIGURATION.md#plugins

## Configuration

```toml @sample.conf
# Read Nginx virtual host traffic status module information (nginx-module-vts)
[[inputs.nginx_vts]]
  ## An array of ngx_http_status_module or status URI to gather stats.
  urls = ["http://localhost/status", "http+unix:///var/run/nginx.sock:/status"]

  ## HTTP response timeout (default: 5s)
  response_timeout = "5s"

  ## Optional TLS Config
  # tls_ca = "/etc/telegraf/ca.pem"
  # tls_cert = "/etc/telegraf/cert.pem"
  # tls_key = "/etc/telegraf/key.pem"
  ## Use TLS but skip chain & host verification
  # insecure_skip_verify = false
```

## Metrics

- nginx_vts_connections
  - active
  - reading
  - writing
  - waiting
  - accepted
  - handled
  - requests
- nginx_vts_server, nginx_vts_filter
  - requests
  - request_time
  - in_bytes
  - out_bytes
  - response_1xx_count
  - response_2xx_count
  - response_3xx_count
  - response_4xx_count
  - response_5xx_count
  - cache_miss
  - cache_bypass
  - cache_expired
  - cache_stale
  - cache_updating
  - cache_revalidated
  - cache_hit
  - cache_scarce
- nginx_vts_upstream
  - requests
  - request_time
  - response_time
  - in_bytes
  - out_bytes
  - response_1xx_count
  - response_2xx_count
  - response_3xx_count
  - response_4xx_count
  - response_5xx_count
  - weight
  - max_fails
  - fail_timeout
  - backup
  - down
- nginx_vts_cache
  - max_bytes
  - used_bytes
  - in_bytes
  - out_bytes
  - miss
  - bypass
  - expired
  - stale
  - updating
  - revalidated
  - hit
  - scarce

### Tags

- nginx_vts_connections
  - source
  - port
- nginx_vts_server
  - source
  - port
  - zone
- nginx_vts_filter
  - source
  - port
  - filter_name
  - filter_key
- nginx_vts_upstream
  - source
  - port
  - upstream
  - upstream_address
- nginx_vts_cache
  - source
  - port
  - zone

## Example Output

Using this configuration:

```toml
[[inputs.nginx_vts]]
  ## An array of Nginx status URIs to gather stats.
  urls = ["http://localhost/status"]
```

When run with:

```sh
./telegraf -config telegraf.conf -input-filter nginx_vts -test
```

It produces:

```shell
nginx_vts_connections,source=localhost,port=80,host=localhost waiting=30i,accepted=295333i,handled=295333i,requests=6833487i,active=33i,reading=0i,writing=3i 1518341521000000000
nginx_vts_server,zone=example.com,port=80,host=localhost,source=localhost cache_hit=158915i,in_bytes=1935528964i,out_bytes=6531366419i,response_2xx_count=809994i,response_4xx_count=16664i,cache_bypass=0i,cache_stale=0i,cache_revalidated=0i,requests=2187977i,response_1xx_count=0i,response_3xx_count=1360390i,cache_miss=2249i,cache_updating=0i,cache_scarce=0i,request_time=13i,response_5xx_count=929i,cache_expired=0i 1518341521000000000
nginx_vts_server,host=localhost,source=localhost,port=80,zone=* requests=6775284i,in_bytes=5003242389i,out_bytes=36858233827i,cache_expired=318881i,cache_updating=0i,request_time=51i,response_1xx_count=0i,response_2xx_count=4385916i,response_4xx_count=83680i,response_5xx_count=1186i,cache_bypass=0i,cache_revalidated=0i,cache_hit=1972222i,cache_scarce=0i,response_3xx_count=2304502i,cache_miss=408251i,cache_stale=0i 1518341521000000000
nginx_vts_filter,filter_key=FI,filter_name=country,port=80,host=localhost,source=localhost request_time=0i,in_bytes=139701i,response_3xx_count=0i,out_bytes=2644495i,response_1xx_count=0i,cache_expired=0i,cache_scarce=0i,requests=179i,cache_miss=0i,cache_bypass=0i,cache_stale=0i,cache_updating=0i,cache_revalidated=0i,cache_hit=0i,response_2xx_count=177i,response_4xx_count=2i,response_5xx_count=0i 1518341521000000000
nginx_vts_upstream,port=80,host=localhost,upstream=backend_cluster,upstream_address=127.0.0.1:6000,source=localhost fail_timeout=10i,backup=false,request_time=31i,response_5xx_count=1081i,response_2xx_count=1877498i,max_fails=1i,in_bytes=2763336289i,out_bytes=19470265071i,weight=1i,down=false,response_time=31i,response_1xx_count=0i,response_4xx_count=76125i,requests=3379232i,response_3xx_count=1424528i 1518341521000000000
nginx_vts_cache,source=localhost,port=80,host=localhost,zone=example stale=0i,used_bytes=64334336i,miss=394573i,bypass=0i,expired=318788i,updating=0i,revalidated=0i,hit=689883i,scarce=0i,max_bytes=9223372036854775296i,in_bytes=1111161581i,out_bytes=19175548290i 1518341521000000000
```
