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nginx-check's Introduction

Sensu NGINX Check

Table of Contents

Overview

The Sensu NGINX Check is a Sensu Check that provides access to basic NGINX status information.

Output Metrics

Name Type Description
nginx_active gauge The current number of active client connections including Waiting connections.
nginx_accepts counter The total number of accepted client connections.
nginx_handled counter The total number of handled connections. Generally, the parameter value is the same as accepts unless some resource limits have been reached.
nginx_requests counter The total number of client requests.
nginx_reading gauge The current number of connections where nginx is reading the request header.
nginx_writing gauge The current number of connections where nginx is writing the response back to the client.
nginx_waiting gauge The current number of idle client connections waiting for a request.

Usage Examples

Default usage, uses http://localhost:81/nginx_status:

nginx-check

Specify URL:

nginx-check --url 'http://localhost:8011/nginx_status' 

Specify host, port and status path individually:

nginx-check --hostname localhost --port 8011 --status-path nginx_status

Specify the HTTP timeout in seconds to prevent the plugin from blocking:

nginx-check --timeout 15

Usage:

nginx-check --help

Help Output

Performs on-demand metrics monitoring of NGINX instances

Usage:
  nginx-check [flags]
  nginx-check [command]

Available Commands:
  help        Help about any command
  version     Print the version number of this plugin

Flags:
  -h, --help                 help for nginx-check
      --hostname string      The NGINX hostname (default "localhost")
  -p, --port uint32          The NGINX port number (default 81)
      --status-path string   The NGINX status path (default "nginx_status")
  -t, --timeout uint32       The request timeout in seconds (0 for no timeout) (default 10)
  -u, --url string           The NGINX status path URL

Use "nginx-check [command] --help" for more information about a command.

Environment Variables

Argument Environment Variable
--hostname NGINX_CHECK_HOSTNAME
--port NGINX_CHECK_PORT
--status-path NGINX_CHECK_STATUS_PATH
--timeout NGINX_CHECK_TIMEOUT
--url NGINX_CHECK_URL

Configuration

Asset Registration

Sensu Assets are the best way to make use of this plugin. If you're not using an asset, please consider doing so! If you're using sensuctl 5.13 with Sensu Backend 5.13 or later, you can use the following command to add the asset:

sensuctl asset add sensu/nginx-check

If you're using an earlier version of sensuctl, you can find the asset on the [Bonsai Asset Index][https://bonsai.sensu.io/assets/sensu/nginx-check].

Check Definition

---
type: CheckConfig
api_version: core/v2
metadata:
  name: nginx-check
  namespace: default
spec:
  command: nginx-check --url 'http://localhost:81/nginx_status' --timeout 10
  subscriptions:
    - system
  runtime_assets:
    - sensu/nginx-check
  output_metric_format: prometheus_text

Installation from Source

The preferred way of installing and deploying this plugin is to use it as an Asset. If you would like to compile and install the plugin from source or contribute to it, download the latest version or create an executable script from this source.

From the local path of the nginx-check repository:

go build

Contributing

For more information about contributing to this plugin, see Contributing.

nginx-check's People

Contributors

fguimond avatar thoward avatar portertech avatar

Stargazers

Miah Johnson avatar Ulaş SAYGIN avatar

Watchers

Jef Spaleta avatar James Phillips avatar  avatar  avatar Eric Chlebek avatar Gustav Danielsson avatar Sandeep Tripathy avatar Hillary Fraley avatar  avatar Justin Henderson avatar

Forkers

isabella232

nginx-check's Issues

Initial Implementation

Overview

This Sensu plugin will perform on-demand monitoring of NGINX and NGINX+ instances. It will collect metrics in Prometheus format, emitting them on STDOUT. Additionally, it may perform analysis to determine the health of those instances, the results of which will be presented as one or more exit status levels.

References

Prior Art:

Misc Docs:

Configuration

  • --hostname the hostname (default: "localhost")
  • --port the port (default: 81)
  • --status_path the subpath to status endpoint (default: "nginx_status")
  • --url the url to the status endpoint in the form http://<hostname>:<port>/<status_path> (default: "http://localhost:81/nginx_status")

Configuration Logic & Validation

Either the --url option OR the individual --hostname, --port, and --status_path options must be set.

Metrics

All metrics should be output in Prometheus format.

MVP to light up the Sumo Logic Dashboard:

Metrics:

  • nginx_active
  • nginx_handled
  • nginx_accepts
  • nginx_requests
  • nginx_reading
  • nginx_writing
  • nginx_waiting

Tags:

  • server
  • port

For parity w/ Datadog, here's the list of metrics they produce (also available in CSV format).

Out of scope (for MVP):

  • NGINX+ support

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