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Kong

Overview

Kong is an Ingress Controller for use on k8s clusters. Features include Ingress routing, low latency, API management which allows users to use various plugins. These plugins allow users to take advantage of additional features which provide monitoring, TLS termination, transformations, and Deep Packet Inspection. In addition users can take advantage of health checking, load-balancing, and authentication functionality.

What Will You Do

In this exercise,

  • You will create a "kong" addon and use it in a custom cluster blueprint
  • You will then apply this cluster blueprint to a managed cluster

Important

This tutorial describes the steps to create and use a custom cluster blueprint using the Web Console. The entire workflow can also be fully automated and embedded into an automation pipeline.

Assumptions

  • You have already provisioned or imported one or more Kubernetes clusters using the controller.

Step 1: Download Kong YAML

Navigate to Kongs' GIT Repo and download the k8s yaml file "all-in-one-dbless.yaml".

Step 2: Create Kong Addon

  • Login into the Web Console and navigate to your Project as an Org Admin or Infrastructure Admin
  • Under Infrastructure, select "Namespaces" and create a new namespace called "kong"
  • Select "Addons" and "Create" a new Addon called "kong" by selecting the "+ New Add-On" button
  • Ensure that you select "k8s YAML" for type and select the namespace as "kong"
  • Provide the "all-in-one-dbless.yaml" from the previous step and select "CREATE"
  • Click on "+ New Version"
  • Enter "v1.0.0" for the Version Name and "UPLOAD" the k8s Yaml File downloaded in step 1
  • Select "Save Changes"

Once the addon is created, ensure you publish it and optionally provide a version so that it can be tracked.

Create Kong Addon

Step 3: Create Blueprint

Now, we are ready to assemble a custom cluster blueprint using the addons.

  • Under Infrastructure, select "Blueprints"
  • Create a new blueprint and give it a name such as "kong"
  • Create a new version of the blueprint by selecting "+ New Version"
  • Enter a version name such as "1.0" and add the appropriate Add-Ons.
  • Ensure that you have the managed Ingress disabled

Once the blueprint is created, ensure you publish it and optionally provide a version so that it can be tracked.

Create Blueprint

Show Blueprint

Step 4: Apply Blueprint

Now, we are ready to apply this custom blueprint to a cluster.

  • Click on Options for the target Cluster in the Web Console
  • Select "Update Blueprint" and select the "kong" blueprint and appropriate version we created from the list

Update Blueprint

Click on "Save and Publish". This will start the deployment of the addons configured in the "alb-ingress" blueprint to the targeted cluster. The blueprint sync process can take a few minutes. Once complete, the cluster will display the current cluster blueprint details and whether the sync was successful or not. See illustrative example below.

Blueprint Update

Step 5: Verify Deployment

Users can optionally verify whether the correct resources have been created on the cluster.

  • Click on the Kubectl button on the cluster to open a virtual terminal
  • First, we will verify if the kong namespace has been created
kubectl get ns kong

NAME           STATUS   AGE
kong   Active   9m32s
  • Next, we will verify the pods in the "kong" namespace. You should see something like the example below.
kubectl get po -n kong

NAME                            READY   STATUS    RESTARTS   AGE
ingress-kong-6868f56458-mq6dn   2/2     Running   0          5m21s

Step 6: Create Workload

  • Copy the file below and save as kong-ingress.yaml 
    apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: demo
  annotations:
    kubernetes.io/ingress.class: kong
spec:
  rules:
    - host: kong.dev.rafay-edge.net
      http:
        paths:
        - path: /foo
          backend:
            serviceName: echo
            servicePort: 80
  • Under Applications, select "Workloads"

  • Select "New Workload" and enter a Name, set Package Type to "k8s YAML", and select the Namespace Workload 1

  • Upload file kong-ingress.yaml Workload 2

  • Set Drift Action and Placement Policy Workload 3

  • Publish Workload Workload 4

Step 7: Verify Workload

  • Click on the Kubectl button on the cluster to open a virtual terminal and run the following kubectl command
kubectl get ingresses -n david-private-ns

NAME          CLASS    HOSTS                     ADDRESS                                                                         PORTS   AGE
demo          <none>   kong.dev.rafay-edge.net   ad570dd03c48746bf8b0fadd4fa08f47-708c18117257066b.elb.us-west-1.amazonaws.com   80      2m53s

Recap

Congratulations! You have successfully created a custom cluster blueprint with the "kong" addon and applied to a cluster. You can now use this blueprint on as many clusters as you require.