Emissary-ingress quick start

1. Installation

We'll start by installing Emissary-ingress into your cluster.

We recommend using Helm but there are other options below to choose from.

2. Routing traffic from the edge

Emissary-ingress uses Kubernetes Custom Resource Definitions (CRDs) to declaratively define its desired state. The workflow you are going to build uses a simple demo app, a Listener CRD, and a Mapping CRD. The Listener CRD tells Emissary-ingress what port to listen on, and the Mapping CRD tells Emissary-ingress how to route incoming requests by host and URL path from the edge of your cluster to Kubernetes services.

1. Start by creating a Listener resource for HTTP on port 8080:

   This Listener will associate with all Hosts in your cluster. This is fine for the quickstart, but is likely not what you really want for production use.
   
   Learn more about Listener.
   Learn more about Host.

2. Apply the YAML for the “Quote of the Moment" service.

   The Service and Deployment are created in your default namespace. You can use kubectl get services,deployments quote to see their status.

3. Copy the configuration below and save it to a file called quote-backend.yaml so that you can create a Mapping on your cluster. This Mapping tells Emissary-ingress to route all traffic inbound to the /backend/ path to the quote Service.

4. Apply the configuration to the cluster:

   With our Mapping created, now we need to access it!

5. Store the Emissary-ingress load balancer IP address to a local environment variable. You will use this variable to test access to your service.

6. Test the configuration by accessing the service through the Emissary-ingress load balancer:

What's next?

Explore some of the popular tutorials on Emissary-ingress:

• Configuring Emissary-ingress communications: configure how Emissary-ingress handles communication with clients
• Intro to Mappings: declaratively routes traffic from the edge of your cluster to a Kubernetes service
• Listener resource: configure ports, protocols, and security options for your ingress.
• Host resource: configure a hostname and TLS options for your ingress.

Emissary-ingress has a comprehensive range of features to support the requirements of any edge microservice.

To learn more about how Emissary-ingress works, read the Emissary-ingress Story.