Kubeless HTTP Triggers

In the previous sections, we discussed how to invoke Kubeless functions using the Kubeless CLI. In this section, we are going to demonstrate how to expose these functions to everyone by creating HTTP triggers.

HTTP triggers are used to execute a Kubeless function through HTTP(S)-based invocations such as HTTP GET or POST requests. When a function is deployed, Kubeless will create a Kubernetes service associated with the function with the ClusterIP as the service type; however, these services are not publicly accessible. In order to make the function publicly available, we need to create a Kubeless HTTP trigger. This will expose the Kubeless functions to everyone by using Kubernetes ingress rules.

In order to run the HTTP trigger, your Kubernetes cluster must have a running ingress controller. Once the ingress controller is running in the Kubernetes cluster, you can use the kubeless trigger http create command to create an HTTP trigger:

$ kubeless trigger...