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Updates the readme to be more readable/usable #16

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169 changes: 128 additions & 41 deletions README.md
Original file line number Diff line number Diff line change
@@ -1,5 +1,19 @@
[![Bonsai Asset Badge](https://img.shields.io/badge/Sensu%20Prometheus%20Collector-Download%20Me-brightgreen.svg?colorB=89C967&logo=sensu)](https://bonsai.sensu.io/assets/sensu/sensu-prometheus-collector) [![Build Status](https://travis-ci.org/sensu/sensu-prometheus-collector.svg?branch=master)](https://travis-ci.org/sensu/sensu-prometheus-collector)
## Sensu Prometheus Collector

- [Overview](#overview)
- [Usage examples](#usage-examples)
- [Configuration](#configuration)
- [Sensu Go](#sensu-go)
- [Asset definition](#asset-definition)
- [Check definition(s)](#check-definitions)
- [Sensu Core](#sensu-core)
- [Check definition](#check-definition)
- [Handler definition](#handler-definition)
- [Installation from source and contributing](#installation-from-source-and-contributing)

### Overview

The Sensu Prometheus Collector is a Sensu Check Plugin that collects
metrics from a Prometheus exporter or the Prometheus query API. The
collected metrics are outputted to STDOUT in one of three formats,
Expand All @@ -12,48 +26,8 @@ one or more time-series databases, for example InfluxDB and/or
Graphite! Instrument your applications with the Prometheus libraries
and immediately begin collecting your metrics with Sensu!

### Installation

Download the latest version of the `sensu-prometheus-collector` binary
from
[Releases](https://github.com/portertech/sensu-prometheus-collector/releases).

### Configuration

Example Sensu 1.x check definition:

```
{
"checks": {
"prometheus_metrics": {
"type": "metric",
"command": "sensu-prometheus-collector -exporter-url http://localhost:8080/metrics",
"subscribers": ["app_tier"],
"interval": 10,
"handler": "influx"
}
}
}
```

Example Sensu 1.x handler definition:

```
{
"handlers": {
"influx": {
"type": "udp",
"mutator": "only_check_output",
"socket": {
"host": "influx.example.com",
"port": 8189
}
}
}
}
```
### Usage examples

### Usage Examples

Help:

Expand Down Expand Up @@ -102,3 +76,116 @@ Prometheus query API:
$ sensu-prometheus-collector -prom-url http://localhost:9090 -prom-query up
up,instance=localhost:9090,job=prometheus value=1 1506991495
```

### Asset registration

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

`sensuctl asset add sensu/sensu-prometheus-collector`

If you're using an earlier version of sensuctl, you can download the asset definition from [this project's Bonsai Asset Index page](https://bonsai.sensu.io/assets/sensu/sensu-prometheus-collector).

### Configuration

#### Sensu Go

##### Asset definition
```yaml
---
type: Asset
api_version: core/v2
metadata:
name: sensu-prometheus-collector_linux_amd64
labels:
annotations:
io.sensu.bonsai.url: https://bonsai.sensu.io/assets/sensu/sensu-prometheus-collector
io.sensu.bonsai.api_url: https://bonsai.sensu.io/api/v1/assets/sensu/sensu-prometheus-collector
io.sensu.bonsai.tier: Supported
io.sensu.bonsai.version: 1.1.6
io.sensu.bonsai.namespace: sensu
io.sensu.bonsai.name: sensu-prometheus-collector
io.sensu.bonsai.tags: check
spec:
url: https://assets.bonsai.sensu.io/ef812286f59de36a40e51178024b81c69666e1b7/sensu-prometheus-collector_1.1.6_linux_amd64.tar.gz
sha512: a70056ca02662fbf2999460f6be93f174c7e09c5a8b12efc7cc42ce1ccb5570ee0f328a2dd8223f506df3b5972f7f521728f7bdd6abf9f6ca2234d690aeb3808
filters:
- entity.system.os == 'linux'
- entity.system.arch == 'amd64'
```

##### Check definition

```yaml
---
type: CheckConfig
api_version: core/v2
metadata:
name: sensu-prom-metrics
namespace: default
spec:
check_hooks: null
command: sensu-prometheus-collector -exporter-url http://localhost:9182/metrics
output_metric_format: influxdb_line
output_metric_handlers:
- influxdb
runtime_assets:
- sensu/sensu-prometheus-collector
stdin: false
subdue: null
subscriptions:
- linux
timeout: 5
ttl: 0
```

#### Sensu Core

##### Check definition

```
{
"checks": {
"prometheus_metrics": {
"type": "metric",
"command": "sensu-prometheus-collector -exporter-url http://localhost:8080/metrics",
"subscribers": ["app_tier"],
"interval": 10,
"handler": "influx"
}
}
}
```

##### Handler definition

```
{
"handlers": {
"influx": {
"type": "udp",
"mutator": "only_check_output",
"socket": {
"host": "influx.example.com",
"port": 8189
}
}
}
}
```


## Installation from source and contributing

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 of the sensu-CHANGEME from [releases][1]
or create an executable script from this source.

From the local path of the sensu-prometheus-collector repository:

```
go build -o /usr/local/bin/sensu-prometheus-collector main.go
```

If you'd like to contribute to this plugin, see https://github.com/sensu/sensu-go/blob/master/CONTRIBUTING.md

[1]: https://github.com/sensu/sensu-prometheus-collector/releases
[2]: #asset-registration