Upgrading NGINX Ingress controller with integrated Wallarm modules¶

These instructions describe the steps to upgrade deployed Wallarm NGINX-based Ingress Controller 4.x to the new version with Wallarm node 4.10.

To upgrade the end‑of‑life node (3.6 or lower), please use the different instructions.

Requirements¶

Kubernetes platform version 1.24-1.27
Helm package manager
Compatibility of your services with the Community Ingress NGINX Controller version 1.9.5
Access to the account with the Administrator role and two‑factor authentication disabled in Wallarm Console for the US Cloud or EU Cloud
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. Ensure the access is not blocked by a firewall
Access to the Wallarm repositories on Docker Hub https://hub.docker.com/r/wallarm. Make sure the access is not blocked by a firewall
Access to the IP addresses of Google Cloud Storage listed within the link. When you allowlist, denylist, or graylist entire countries, regions, or data centers instead of individual IP addresses, the Wallarm node retrieves precise IP addresses related to the entries in the IP lists from the aggregated database hosted on Google Storage

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:

Install the plugin:

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

Run the plugin:
```
helm diff upgrade <RELEASE_NAME> -n <NAMESPACE> wallarm/wallarm-ingress --version 4.10.4 -f <PATH_TO_VALUES>
```
- <RELEASE_NAME>: the name of the Helm release with the Ingress controller chart
- <NAMESPACE>: the namespace the Ingress controller is deployed to
- <PATH_TO_VALUES>: the path to the values.yaml file defining the Ingress controller 4.10 settings - you can use the one created for running the previous Ingress controller version
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 NGINX Ingress controller:

helm upgrade <RELEASE_NAME> -n <NAMESPACE> wallarm/wallarm-ingress --version 4.10.4 -f <PATH_TO_VALUES>

<RELEASE_NAME>: the name of the Helm release with the Ingress controller chart
<NAMESPACE>: the namespace the Ingress controller is deployed to
<PATH_TO_VALUES>: the path to the values.yaml file defining the Ingress controller 4.10 settings - you can use the one created for running the previous Ingress controller version

Step 4: Test the upgraded Ingress controller¶

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 wallarm-ingress-4.10.4.

Get the list of pods:

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

Each pod status should be STATUS: Running or READY: N/N. For example:

NAME                                                              READY     STATUS    RESTARTS   AGE
ingress-controller-nginx-ingress-controller-675c68d46d-cfck8      3/3       Running   0          5m
ingress-controller-nginx-ingress-controller-wallarm-tarantljj8g   4/4       Running   0          5m

Send the request with the test Path Traversal attack to the Wallarm Ingress controller address:
```
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.