Azure Functions plugin

This plugin invokes Azure Functions. It can be used in combination with other request plugins to secure, manage, or extend the function.

Configuration Reference

This plugin is compatible with DB-less mode.

In DB-less mode, you configure Kong Gateway declaratively. Therefore, the Admin API is mostly read-only. The only tasks it can perform are all related to handling the declarative config, including:

Setting a target's health status in the load balancer
Validating configurations against schemas
Uploading the declarative configuration using the /config endpoint

Example plugin configuration

Enable on a service

Enable on a route

Enable on a consumer

Enable globally

The following examples provide some typical configurations for enabling the azure-functions plugin on a service.

Admin API

Kubernetes

Declarative (YAML)

Konnect Cloud

Kong Manager

Make the following request:

curl -X POST http://{HOST}:8001/services/{SERVICE}/plugins \
    --data "name=azure-functions"  \
    --data "config.functionname=<AZURE_FUNCTIONNAME>" \
    --data "config.appname=<AZURE_APPNAME>" \
    --data "config.hostdomain=azurewebsites.net" \
    --data "config.apikey=<AZURE_APIKEY>"

SERVICE is the id or name of the service that this plugin configuration will target.

First, create a KongPlugin resource:

apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: <azure-functions-example>
config: 
  functionname: <AZURE_FUNCTIONNAME>
  appname: <AZURE_APPNAME>
  hostdomain: azurewebsites.net
  apikey: <AZURE_APIKEY>
plugin: azure-functions

Next, apply the KongPlugin resource to a Service by annotating the Service as follows:

apiVersion: v1
kind: Service
metadata:
  name: {SERVICE}
  labels:
    app: {SERVICE}
  annotations:
    konghq.com/plugins: <azure-functions-example>
spec:
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
    name: {SERVICE}
  selector:
    app: {SERVICE}

{SERVICE} is the id or name of the service that this plugin configuration will target.

Note: The KongPlugin resource only needs to be defined once and can be applied to any service, consumer, or route in the namespace. If you want the plugin to be available cluster-wide, create the resource as a KongClusterPlugin instead of KongPlugin.

Add this section to your declarative configuration file:

plugins:
- name: azure-functions
  service: {SERVICE}
  config: 
    functionname: <AZURE_FUNCTIONNAME>
    appname: <AZURE_APPNAME>
    hostdomain: azurewebsites.net
    apikey: <AZURE_APIKEY>

SERVICE is the id or name of the service that this plugin configuration will target.

In Konnect Cloud, select the service on the ServiceHub page.
Scroll down to Versions and select the version.
Scroll down to Plugins and click New Plugin.
Find and select the Azure Functions plugin.
Enter the following parameters, updating the default or sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

In Kong Manager, select the workspace.
From the Dashboard, scroll down to Services and click View for the service row.
Scroll down to plugins and click Add Plugin.
Find and select the Azure Functions plugin.

Note: If the plugin is greyed out, then it is not available for your product tier. See Kong Gateway tiers.
If the option is available, select Scoped.
Add the service name and ID to the Service field if it is not already prefilled.
Enter the following parameters, updating the default or sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

The following examples provide some typical configurations for enabling the azure-functions plugin on a route.

Admin API

Kubernetes

Declarative (YAML)

Konnect Cloud

Kong Manager

Make the following request:

$ curl -X POST http://{HOST}:8001/routes/{ROUTE}/plugins \
    --data "name=azure-functions"  \
    --data "config.functionname=<AZURE_FUNCTIONNAME>" \
    --data "config.appname=<AZURE_APPNAME>" \
    --data "config.hostdomain=azurewebsites.net" \
    --data "config.apikey=<AZURE_APIKEY>"

ROUTE is the id or name of the route that this plugin configuration will target.

First, create a KongPlugin resource:

apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: <azure-functions-example>
config: 
  functionname: <AZURE_FUNCTIONNAME>
  appname: <AZURE_APPNAME>
  hostdomain: azurewebsites.net
  apikey: <AZURE_APIKEY>
plugin: azure-functions

Then, apply it to an ingress (Route or Routes) by annotating the ingress as follows:

apiVersion: networking/v1beta1
kind: Ingress
metadata:
  name: {ROUTE}
  annotations:
    kubernetes.io/ingress.class: kong
    konghq.com/plugins: <azure-functions-example>
spec:
  rules:
  - host: examplehostname.com
    http:
      paths:
      - path: /bar
        backend:
          serviceName: echo
          servicePort: 80

ROUTE is the id or name of the route that this plugin configuration will target.

Add this section to your declarative configuration file:

plugins:
- name: azure-functions
  route: <route>
  config: 
    functionname: <AZURE_FUNCTIONNAME>
    appname: <AZURE_APPNAME>
    hostdomain: azurewebsites.net
    apikey: <AZURE_APIKEY>

ROUTE is the id or name of the route that this plugin configuration will target.

In Konnect Cloud, select the service from the ServiceHub page.
Scroll down to Versions and select the version.
Select the route.
Scroll down to Plugins and click Add Plugin.
Find and select the Azure Functions plugin.
Enter the following parameters, updating the default or sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

In Kong Manager, select the workspace.
From the Dashboard, select Routes in the left navigation.
Click View for the route row.
Scroll down to plugins and click Add Plugin.
Find and select the Azure Functions plugin.

Note: If the plugin is greyed out, then it is not available for your product tier. See Kong Gateway tiers.
If the option is available, select Scoped.
Add the Route ID if it is not already prefilled.
Enter the following parameters, updating the default or sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

The following examples provide some typical configurations for enabling the azure-functions plugin on a consumer.

Admin API

Kubernetes

Declarative (YAML)

Kong Manager

Make the following request:

$ curl -X POST http://{HOST}:8001/consumers/{CONSUMER}/plugins \
    --data "name=azure-functions"  \
    --data "config.functionname=<AZURE_FUNCTIONNAME>" \
    --data "config.appname=<AZURE_APPNAME>" \
    --data "config.hostdomain=azurewebsites.net" \
    --data "config.apikey=<AZURE_APIKEY>"

CONSUMER is the id or username of the consumer that this plugin configuration will target.

You can combine consumer.id, service.id, or route.id in the same request, to further narrow the scope of the plugin.

First, create a KongPlugin resource:

apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: <azure-functions-example>
config: 
  functionname: <AZURE_FUNCTIONNAME>
  appname: <AZURE_APPNAME>
  hostdomain: azurewebsites.net
  apikey: <AZURE_APIKEY>
plugin: azure-functions

Then, apply it to a consumer by annotating the KongConsumer resource as follows:

apiVersion: configuration.konghq.com/v1
kind: KongConsumer
metadata:
  name: {CONSUMER}
  annotations:
    konghq.com/plugins: <azure-functions-example>
    kubernetes.io/ingress.class: kong

CONSUMER is the id or username of the consumer that this plugin configuration will target.

Note: The KongPlugin resource only needs to be defined once and can be applied to any Service, Consumer, or Route in the namespace. If you want the plugin to be available cluster-wide, create the resource as a KongClusterPlugin instead of KongPlugin.

Add this section to your declarative configuration file:

plugins:
- name: azure-functions
  consumer: {CONSUMER}
  config: 
    functionname: <AZURE_FUNCTIONNAME>
    appname: <AZURE_APPNAME>
    hostdomain: azurewebsites.net
    apikey: <AZURE_APIKEY>

CONSUMER is the id or username of the consumer that this plugin configuration will target.

In Kong Manager, select the workspace.
From the Dashboard, scroll down to Consumers and click View for the consumer row.
Select the Plugins tab.
Click Add Plugin.
Find and select the Azure Functions plugin.

Note: If the plugin is greyed out, then it is not available for your product tier. See Kong Gateway tiers.
If the option is available, select Global.
Enter the following parameters, updating the default or sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

A plugin which is not associated to any service, route, or consumer is considered global, and will be run on every request. Read the Plugin Reference and the Plugin Precedence sections for more information.

The following examples provide some typical configurations for enabling the azure-functions plugin globally.

Admin API

Kubernetes

Declarative (YAML)

Kong Manager

Make the following request:

$ curl -X POST http://{HOST}:8001/plugins/ \
    --data "name=azure-functions"  \
    --data "config.functionname=<AZURE_FUNCTIONNAME>" \
    --data "config.appname=<AZURE_APPNAME>" \
    --data "config.hostdomain=azurewebsites.net" \
    --data "config.apikey=<AZURE_APIKEY>"

Create a KongClusterPlugin resource and label it as global:

apiVersion: configuration.konghq.com/v1
kind: KongClusterPlugin
metadata:
  name: <global-azure-functions>
  annotations:
    kubernetes.io/ingress.class: kong
  labels:
    global: \"true\"
config: 
  functionname: <AZURE_FUNCTIONNAME>
  appname: <AZURE_APPNAME>
  hostdomain: azurewebsites.net
  apikey: <AZURE_APIKEY>
plugin: azure-functions

Add a plugins entry in the declarative configuration file:

plugins:
- name: azure-functions
  config: 
    functionname: <AZURE_FUNCTIONNAME>
    appname: <AZURE_APPNAME>
    hostdomain: azurewebsites.net
    apikey: <AZURE_APIKEY>

In Kong Manager, select the workspace.
From the Dashboard, select Plugins in the left navigation.
Click New Plugin.
Find and select the Azure Functions plugin.

Note: If the plugin is greyed out, then it is not available for your product tier. See Kong Gateway tiers.
If the option is available, set the plugin scope to Global.
Enter the following parameters, updating the default/sample values as needed:
- Config.Functionname: <AZURE_FUNCTIONNAME>
- Config.Appname: <AZURE_APPNAME>
- Config.Hostdomain: azurewebsites.net
Click Create.

Parameters

Here's a list of all the parameters which can be used in this plugin's configuration:

Form Parameter	Description
`name` required Type: string	The name of the plugin, in this case `azure-functions`.
`service.id` Type: string	The ID of the Service the plugin targets.
`route.id` Type: string	The ID of the Route the plugin targets.
`consumer.id` Type: string	The ID of the Consumer the plugin targets.
`enabled` required Type: boolean Default value: `true`	Whether this plugin will be applied.
`config.functionname` required Type: string	Name of the Azure function to invoke.
`config.appname` required Type: string	The Azure app name.
`config.hostdomain` required Type: string Default value: `azurewebsites.net`	The domain where the function resides.
`config.routeprefix` optional Type: string Default value: `/api`	Route prefix to use.
`config.apikey` optional Type: string	The apikey to access the Azure resources. If provided, it is injected as the `x-functions-key` header. If keyring database encryption is enabled, this value will be encrypted.
`config.clientid` optional Type: string	The `clientid` to access the Azure resources. If provided, it is injected as the `x-functions-clientid` header. If keyring database encryption is enabled, this value will be encrypted.
`config.https_verify` optional Type: boolean Default value: `false`	Set to `true` to authenticate the Azure Functions server.
`config.https` optional Type: boolean Default value: `true`	Use of HTTPS to connect with the Azure Functions server.
`config.timeout` optional Type: number Default value: `600000`	Timeout in milliseconds before closing a connection to the Azure Functions server.
`config.keepalive` optional Type: number Default value: `60000`	Time in milliseconds during which an idle connection to the Azure Functions server lives before being closed.

Note: If config.https_verify is set as true, then the server certificate is verified according to the CA certificates specified by the lua_ssl_trusted_certificate directive in your Kong configuration.

Demonstration

To demonstrate the plugin, set up the Azure Functions “hello world” function.

In this example, we’ll consider the following placeholder settings. Insert your own values for the placeholders in the code examples:
- <appname> for the functions appname
- <functionname> for the function name
- <apikey> for the api key

Test your function to make sure it works before adding it to Kong Gateway:

 curl -i -X GET https://<appname>.azurewebsites.net/api/<functionname>?name=Kong \
      -H "x-functions-key:<apikey>"

 HTTP/1.1 200 OK
 ...
 "Hello Kong!"

Set up a route in Kong Gateway and link it to the Azure function you just created.

With a database

Without a database

Create the route:

curl -i -X POST http://localhost:8001/routes \
--data 'name=azure1' \
--data 'paths[1]=/azure1'

Add the plugin:

curl -i -X POST http://localhost:8001/routes/azure1/plugins \
--data "name=azure-functions" \
--data "config.appname=<appname>" \
--data "config.functionname=<functionname>" \
--data "config.apikey=<apikey>"

Add a route and plugin to the declarative config file:

routes:
- name: azure1
  paths: [ "/azure1" ]

plugins:
- route: azure1
  name: azure-functions
  config:
    appname: <appname>
    functionname: <functionname>
    apikey: <apikey>

Test the Azure Function through Kong

In this example, we’re only passing a query parameter name to the Azure Function. Besides query parameters, the HTTP method, path parameters, headers, and body are also passed to the Azure Function if provided.

curl -i -X GET http://localhost:8000/azure1?name=Kong

You should see the same result as shown in step 2:

HTTP/1.1 200 OK
...
"Hello Kong!"

Changelog

1.0.1

Starting with Kong Gateway 2.7.0.0, if keyring encryption is enabled, the config.apikey and config.clientid parameter values will be encrypted.

About this Plugin
Plugin Version	1.0-x
Made by	Kong Inc.
Categories	Serverless
DB-less compatible?	Yes
Konnect Cloud compatible?	Yes
Compatible protocols	`http` `https`
Source	Code
Version Compatibility
Kong Gateway 2.8.x 2.7.x 2.6.x 2.5.x 2.4.x 2.3.x 2.2.x 2.1.x 1.5.x 1.3-x 0.36-x Kong Gateway (OSS) 2.8.x 2.7.x 2.6.x 2.5.x 2.4.x 2.3.x 2.2.x 2.1.x 2.0.x 1.5.x 1.4.x 1.3.x 1.2.x 1.1.x 1.0.x 0.14.x