---
title: "Caddy integration | Grafana Cloud documentation"
description: "Learn about Caddy Grafana Cloud integration."
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# Caddy integration for Grafana Cloud

The Caddy web server is an open-source web server written in Go. It uses the Go standard library for its HTTP functionality and supports HTTPS natively.

This integration includes 1 pre-built dashboard to help monitor and visualize Caddy metrics.

## Before you begin

In order for the integration to work, you must enable the built-in Prometheus metrics endpoint in Caddy.

If using a Caddyfile, enable metrics [in global options](https://caddyserver.com/docs/caddyfile/options#metrics):

![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```none
{
    servers {
        metrics
    }
}
```

## Install Caddy integration for Grafana Cloud

1. In your Grafana Cloud stack, click **Connections** in the left-hand menu.
2. Find **Caddy** and click its tile to open the integration.
3. Review the prerequisites in the **Configuration Details** tab and set up Grafana Alloy to send Caddy metrics to your Grafana Cloud instance.
4. Click **Install** to add this integration’s pre-built dashboard to your Grafana Cloud instance, and you can start monitoring your Caddy setup.

## Configuration snippets for Grafana Alloy

### Simple mode

These snippets are configured to scrape a single Caddy instance running locally with default ports.

First, **manually** copy and append the following snippets into your alloy configuration file.

### Metrics snippets

Alloy ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```alloy
discovery.relabel "metrics_integrations_integrations_caddy" {
	targets = [{
		__address__ = "localhost:2019",
	}]

	rule {
		target_label = "instance"
		replacement  = constants.hostname
	}
}

prometheus.scrape "metrics_integrations_integrations_caddy" {
	targets    = discovery.relabel.metrics_integrations_integrations_caddy.output
	forward_to = [prometheus.remote_write.metrics_service.receiver]
	job_name   = "integrations/caddy"
}
```

### Advanced mode

The following snippets provide examples to guide you through the configuration process.

To instruct Grafana Alloy to scrape your Caddy instances, **manually** copy and append the snippets to your alloy configuration file, then follow subsequent instructions.

### Advanced metrics snippets

Alloy ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```alloy
discovery.relabel "metrics_integrations_integrations_caddy" {
	targets = [{
		__address__ = "localhost:2019",
	}]

	rule {
		target_label = "instance"
		replacement  = constants.hostname
	}
}

prometheus.scrape "metrics_integrations_integrations_caddy" {
	targets    = discovery.relabel.metrics_integrations_integrations_caddy.output
	forward_to = [prometheus.remote_write.metrics_service.receiver]
	job_name   = "integrations/caddy"
}
```

To monitor your Caddy instance, you must use a [discovery.relabel](/docs/alloy/latest/reference/components/discovery.relabel/) component to discover your Caddy Prometheus endpoint and apply appropriate labels, followed by a [prometheus.scrape](/docs/alloy/latest/reference/components/prometheus.scrape) component to scrape it.

Configure the following properties within each `discovery.relabel` component:

- `__address__`: The address to your Caddy Prometheus metrics endpoint.
- `instance` label: `constants.hostname` sets the `instance` label to your Grafana Alloy server hostname. If that is not suitable, change it to a value uniquely identifies this Caddy instance.

If you have multiple Caddy servers to scrape, configure one `discovery.relabel` for each and scrape them by including each under `targets` within the `prometheus.scrape` component.

## Dashboards

The Caddy integration installs the following dashboards in your Grafana Cloud instance to help monitor your system.

- Caddy Overview

**Caddy overview**

## Metrics

The most important metrics provided by the Caddy integration, which are used on the pre-built dashboard, are as follows:

- caddy\_http\_request\_duration\_seconds\_bucket
- caddy\_http\_request\_duration\_seconds\_count
- caddy\_http\_requests\_in\_flight
- caddy\_http\_requests\_total
- up

## Changelog

md ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```md
# 1.1.0 - April 2024

* Add Asserts support
  - Drop $service selector (no longer used)
  
# 1.0.0 - April 2024

* Add Asserts support
  - Add asserts recording rules
  - Add server=~"$service" selector to the dashboard

# 0.0.5 - November 2023

* Replaced Angular dashboard panels with React panels

# 0.0.4 - September 2023

* New Filter Metrics option for configuring the Grafana Agent, which saves on metrics cost by dropping any metric not used by this integration. Beware that anything custom built using metrics that are not on the snippet will stop working.
* New hostname relabel option, which applies the instance name you write on the text box to the Grafana Agent configuration snippets, making it easier and less error prone to configure this mandatory label.

# 0.0.3 - June 2022

* Update mixin to latest version:
  - Add job and instance dashboard template variables

# 0.0.2 - October 2021

* Update all rate queries to use `$__rate_interval` so they respect the default resolution

# 0.0.1 - January 2021

* Initial release
```

## Cost

By connecting your Caddy instance to Grafana Cloud, you might incur charges. To view information on the number of active series that your Grafana Cloud account uses for metrics included in each Cloud tier, see [Active series and dpm usage](/docs/grafana-cloud/fundamentals/active-series-and-dpm/) and [Cloud tier pricing](/products/cloud/pricing/).