# AdguardHome Prometheus Exporter

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This is a Prometheus exporter for [AdguardHome](https://github.com/AdguardTeam/AdguardHome)'s Raspberry PI ad blocker.
It is based on the famous pihole-exporter [available here](https://github.com/eko/pihole-exporter/)

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## Prerequisites

* [Go](https://golang.org/doc/)

## Installation

### Download binary

You can download the latest version of the binary built for your architecture here:

* Architecture **i386** [
    [Darwin](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-darwin-386) /
    [Linux](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-linux-386) /
    [Windows](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-windows-386.exe)
]
* Architecture **amd64** [
    [Darwin](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-darwin-amd64) /
    [Linux](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-linux-amd64) /
    [Windows](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-windows-amd64.exe)
]
* Architecture **armv7** [
    [Linux](https://github.com/ebrianne/adguard-exporter/releases/latest/download/adguard_exporter-linux-arm)
]

### From sources

Optionally, you can download and build it from the sources. You have to retrieve the project sources by using one of the following way:
```bash
$ go get -u github.com/ebrianne/adguard-exporter
# or
$ git clone https://github.com/ebrianne/adguard-exporter.git
```

Install the needed vendors:

```
$ GO111MODULE=on go mod vendor
```

Then, build the binary (here, an example to run on Raspberry PI ARM architecture):
```bash
$ GOOS=linux GOARCH=arm GOARM=7 go build -o adguard_exporter .
```

## Usage

In order to run the exporter, type the following command (arguments are optional):

Using a password

```bash
$ ./adguard_exporter -adguard_hostname 192.168.1.10 -adguard_username admin -adguard_password qwerty
```

```bash
2020/11/02 18:17:02 ---------------------------------------
2020/11/02 18:17:02 - AdGuard Home exporter configuration -
2020/11/02 18:17:02 ---------------------------------------
2020/11/02 18:17:02 AdguardProtocol : http
2020/11/02 18:17:02 AdguardHostname : 192.168.1.10
2020/11/02 18:17:02 AdguardPort : 80
2020/11/02 18:17:02 AdguardUsername : admin
2020/11/02 18:17:02 AdGuard Authentication Method : AdguardPassword
2020/11/02 18:17:02 Port : 9617
2020/11/02 18:17:02 Interval : 10s
2020/11/02 18:17:02 ---------------------------------------
2020/11/02 18:17:02 New Prometheus metric registered: avg_processing_time
2020/11/02 18:17:02 New Prometheus metric registered: num_dns_queries
2020/11/02 18:17:02 New Prometheus metric registered: num_blocked_filtering
2020/11/02 18:17:02 New Prometheus metric registered: num_replaced_parental
2020/11/02 18:17:02 New Prometheus metric registered: num_replaced_safebrowsing
2020/11/02 18:17:02 New Prometheus metric registered: num_replaced_safesearch
2020/11/02 18:17:02 New Prometheus metric registered: top_queried_domains
2020/11/02 18:17:02 New Prometheus metric registered: top_blocked_domains
2020/11/02 18:17:02 New Prometheus metric registered: top_clients
2020/11/02 18:17:02 Starting HTTP server
2020/11/02 18:17:13 New tick of statistics: 737 ads blocked / 6492 total DNS queries
```

Once the exporter is running, you also have to update your `prometheus.yml` configuration to let it scrape the exporter:

```yaml
scrape_configs:
  - job_name: 'adguard'
    static_configs:
      - targets: ['localhost:9617']
```

## Available CLI options
```bash
# Interval of time the exporter will fetch data from Adguard
  -interval duration (optional) (default 10s)

# Hostname of the Raspberry PI where Adguard is installed
  -adguard_hostname string (optional) (default "127.0.0.1")

# Username to login to Adguard Home
  -adguard_username string (optional)

# Password defined on the Adguard interface
  -adguard_password string (optional)

# Port to be used for the exporter
  -port string (optional) (default "9617")
```

## Available Prometheus metrics

| Metric name                       | Description                                                          |
|:---------------------------------:|----------------------------------------------------------------------|
| adguard_avg_processing_time       | This represent the average DNS query processing time                 |
| adguard_num_blocked_filtering     | This represent the number of blocked DNS queries                     |
| adguard_num_dns_queries           | This represent the number of DNS queries                             |
| adguard_num_replaced_parental     | This represent the number of blocked DNS queries (parental)          |
| adguard_num_replaced_safebrowsing | This represent the number of blocked DNS queries (safe browsing)     |
| adguard_num_replaced_safesearch   | This represent the number of blocked DNS queries (safe search)       |
| adguard_top_blocked_domains       | This represent the top blocked domains                               |
| adguard_top_clients               | This represent the top clients                                       |
| adguard_top_queried_domains       | This represent the top domains that are queried                      |