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Upgrading Kong Ingress controller with integrated Wallarm modules

These instructions describe the steps to upgrade deployed Wallarm Kong-based Ingress Controller 4.x to the new version with Wallarm node 4.4.

Requirements

  • Kubernetes platform version 1.22-1.26

  • K8s Ingress resources that configure Kong to route API calls to the microservices you want to protect

  • Compatibility of K8s Ingress resources with Kong 3.1.x

  • Helm v3 package manager

  • Access to https://us1.api.wallarm.com for working with US Wallarm Cloud or to https://api.wallarm.com for working with EU Wallarm Cloud

  • Access to https://charts.wallarm.com to add the Wallarm Helm charts

  • Access to the Wallarm repositories on Docker Hub https://hub.docker.com/r/wallarm

  • Access to GCP storage addresses to download an actual list of IP addresses registered in allowlisted, denylisted, or graylisted countries, regions or data centers

  • Access to the account with the Administrator role in Wallarm Console for the US Cloud or the EU Cloud

Step 1: Update the Wallarm Helm chart repository

helm repo update wallarm

Step 2: Check out all coming K8s manifest changes

To avoid unexpectedly changed Ingress controller behavior, check out all coming K8s manifest changes using Helm Diff Plugin. This plugin outputs the difference between the K8s manifests of the deployed Ingress controller version and of the new one.

To install and run the plugin:

  1. Install the plugin:

    helm plugin install https://github.com/databus23/helm-diff
    
  2. Run the plugin:

    helm diff upgrade <RELEASE_NAME> -n <NAMESPACE> wallarm/kong --version 4.4.1 -f <PATH_TO_VALUES>
    
    • <RELEASE_NAME>: the name of the Helm release with the Ingress controller chart
    • <NAMESPACE>: the namespace the Helm chart with the Ingress controller is deployed to
    • <PATH_TO_VALUES>: the path to the values.yaml file defining the Ingress controller 4.4 settings - you can use the one created for running the previous Ingress controller version
  3. Make sure that no changes can affect the stability of the running services and carefully examine the errors from stdout.

    If stdout is empty, make sure that the values.yaml file is valid.

Step 3: Upgrade the Ingress controller

Upgrade the deployed Kong Ingress controller:

helm upgrade <RELEASE_NAME> -n <NAMESPACE> wallarm/kong --version 4.4.1 -f <PATH_TO_VALUES>
  • <RELEASE_NAME>: the name of the Helm release with the Ingress controller chart

  • <NAMESPACE>: the namespace the Helm chart with the Ingress controller is deployed to

  • <PATH_TO_VALUES>: the path to the values.yaml file defining the Ingress controller 4.4 settings - you can use the one created for running the previous Ingress controller version

Step 4: Test the upgraded Ingress controller

  1. Make sure the version of the Helm chart was upgraded:

    helm list -n <NAMESPACE>
    

    Where <NAMESPACE> is the namespace the Helm chart with the Ingress controller is deployed to.

    The chart version should correspond to kong-4.4.0.

  2. Get the Wallarm pod details to check they have been successfully started:

    kubectl get pods -n <NAMESPACE> -l app.kubernetes.io/name=kong
    

    Each pod should display the following: READY: N/N and STATUS: Running, e.g.:

    NAME                                                      READY   STATUS    RESTARTS   AGE
    wallarm-ingress-kong-54cf88b989-gp2vg                     1/1     Running   0          91m
    wallarm-ingress-kong-wallarm-tarantool-86d9d4b6cd-hpd5k   4/4     Running   0          91m
    
  3. Send the test Path Traversal attacks to the Kong Ingress Controller Service:

    curl http://<INGRESS_CONTROLLER_IP>/etc/passwd
    

    Check that the solution of the newer version processes the malicious request as it did in the previous version.