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docs: integration doc ngrok minor fix (#1640)
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* Init ngrok doc

* Finish draft

* Address style comments from Karl

* Add Parameter table

* Simplify and clarify usage section

* Integrate fixes from Karl

* docs: added ngrok logo

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Co-authored-by: Joel Hans <j@joelhans.com>
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karl-cardenas-coding and joelhans authored Oct 4, 2023
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---
sidebar_label: "ngrok"
title: "ngrok"
description: "Learn about using ngrok Kubernetes Ingress to access applications in Palette."
hide_table_of_contents: true
type: "integration"
category: ["ingress", "kubernetes", "amd64"]
sidebar_class_name: "hide-from-sidebar"
logoUrl: "https://registry.spectrocloud.com/v1/ngrok-ingress-controller/blobs/sha256:a723399d53d716c5441d57d021a7975d961e5b7db79ccb2bc10f7524ba7e67c1?type=image/png"
tags: ["packs", "ngrok", "network", "kubernetes"]
---

The ngrok [Ingress Controller for Kubernetes](https://github.com/ngrok/kubernetes-ingress-controller) adds public and
secure ingress traffic to Kubernetes applications. This open-source [Ingress
Controller](https://kubernetes.io/docs/concepts/services-networking/ingress-controllers) works with Palette to provide
ingress to your applications, APIs, or other resources while also offloading network ingress and middleware execution to
ngrok's platform.

# Versions Supported

- 0.9.0

## Prerequisites

- An active [ngrok account](https://ngrok.com/signup).
- An ngrok authentication token. You can find your token in the dashboard. Visit the [**Your Authtoken**](https://dashboard.ngrok.com/get-started/your-authtoken) section to review your access token.
- An ngrok API key. You can generate an API key from the ngrok dashboard. Visit the [**API** section](https://dashboard.ngrok.com/api) of the dashboard to review existing keys.
- A static subdomain. You can obtain a static subdomain by navigating to the [**Domains**
section](https://dashboard.ngrok.com/cloud-edge/domains) of the ngrok dashboard and clicking on **Create Domain** or **New Domain**.

## Parameters

To deploy the ngrok Ingress Controller, you need to set, at minimum, the following parameters in the pack's YAML.

| Name | Description |
| --- | --- |
| `kubernetes-ingress-controller.credentials.apiKey` | Your ngrok API key for this application and domain. |
| `kubernetes-ingress-controller.credentials.authtoken` | The authentication token for your active ngrok account. |
| `kubernetes-ingress-controller.rules.host` | A static subdomain hosted by ngrok and associated with your account. |
| `kubernetes-ingress-controller.rules.http.paths.path` | The path at which to route traffic to your application. For more advanced configurations, you can set multiple paths with corresponding `pathType`, `backend.service.name`, and `backend.service.name` parameters. |
| `kubernetes-ingress-controller.rules.host.paths.pathType` | Specify how ingress paths should be [matched by type](https://kubernetes.io/docs/concepts/services-networking/ingress/#path-types). `Prefix` matches based on a URL path prefix split by `/`. `Exact` matches the URL path exactly and with case sensitivity. |
| `kubernetes-ingress-controller.rules.host.backend.service.name` | The name you've given to the application for which the ngrok Ingress Controller should handle traffic. |
| `kubernetes-ingress-controller.rules.host.backend.service.port.number` | The port number for the deployed `service.name`. |

Review the [common overrides](https://github.com/ngrok/kubernetes-ingress-controller/blob/main/docs/deployment-guide/common-helm-k8s-overrides.md) document for more details on parameters. Refer to the [user guide](https://github.com/ngrok/kubernetes-ingress-controller/tree/main/docs/user-guide) for advanced configurations.

:::caution

If you have a free ngrok account, you can only have one ngrok agent active at a time. This means that you will need to set the number of replicas to `1` to ensure that your ngrok agent operates properly.

```yaml
charts:
kubernetes-ingress-controller:
replicaCount: 1
```
:::
## Usage
To use the ngrok Ingress Controller pack, first create a new [add-on cluster profile](../cluster-profiles/create-add-on-profile.md), search for the **ngrok Ingress Controller** pack, and overwrite the default pack configuration with your API key and authentication token like the following example YAML content:
```yaml
charts:
kubernetes-ingress-controller:
...
credentials:
apiKey: API_KEY
authtoken: AUTHTOKEN
```
Next, you must create an ingress service definition for your application, which requires a new manifest layer. Click on the **Add Manifest** button to create a new manifest layer.
The following YAML content demonstrates an example ingress service where the ngrok Ingress Controller creates a new edge to route traffic on your ngrok subdomain `example.com` to an existing `example-app` deployed on your Kubernetes cluster in Palette.

```yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: example-ingress
namespace: ngrok-ingress-controller
spec:
ingressClassName: ngrok
rules:
- host: example.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: example-app
port:
number: 80
```

Once you have defined the ngrok Ingress Controller pack, you can add it to an existing cluster profile, as an add-on profile, or as a new add-on layer to a deployed cluster.

## Terraform

You can reference the ngrok Ingress Controller pack in Terraform with a data resource.

```
data "spectrocloud_registry" "public_registry" {
name = "Public Repo"
}
data "spectrocloud_pack_simple" "ngrok-ingress" {
name = "ngrok-ingress-controller"
version = "0.9.0"
type = "operator-instance"
registry_uid = data.spectrocloud_registry.public_registry.id
}
```
## References
- [Ingress Controller for Kubernetes on GitHub](https://github.com/ngrok/kubernetes-ingress-controller)
- [ngrok documentation](https://ngrok.com/docs/)
- [Get started with the ngrok Ingress Controller for Kubernetes](https://ngrok.com/docs/using-ngrok-with/k8s/)
- [ngrok Pack GitHub](https://github.com/spectrocloud/pack-central/tree/main/packs/ngrok-ingress-controller-0.9.0)
- [ngrok Ingress Controller Helm Documentation](https://github.com/ngrok/kubernetes-ingress-controller/tree/main/docs)

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