Webhook for RHACS Audit Logging

Introduction

Red Hat Advanced Cluster Security for Kubernetes (RHACS) provides audit logging to track changes, capturing PUT and POST events. You can use this data for auditing, troubleshooting, record-keeping, and monitoring gaining insights into both normal and abnormal events.

When you enable audit logging, every time there is a modification, RHACS sends an HTTP POST message (JSON f) to a Webhook you provide. This is a Python Webhook container that you can use to check the log events in the container STDOUT.

Prerequisites

• Python 3.8 or higher.
• Podman or the container engine of your choice.
• Access to an OpenShift cluster for deployment. (I recommend CRC if you want to test it in your local)
• Basic understanding of Red Hat Advanced Cluster Security for Kubernetes.

Building the Container image

Clone this repository to your local machine. Navigate to the cloned directory and build the Container:

$ podman build -t mywebhook .

Push the built image to a container registry:

$ podman tag mywebhook [YOUR_REGISTRY]/mywebhook
$ podman push [YOUR_REGISTRY]/mywebhook

Deploying on OpenShift

Log in to your OpenShift cluster using the oc CLI. Deploy the webhook service using the image from your registry:

$ oc new-project auditlogs
$ oc new-app [YOUR_REGISTRY]/mywebhook
$ oc expose svc/mywebhook

Enabling Audit Logging in ACS:

• Log in to the RHACS Central portal.
• Navigate to Platform Configuration -> Integrations -> Generic Webhook.
• Check ✅ "Enable audit logging".

Get the route url and Fill in the Create Integration form:

$ oc get route mywebhook
NAME        HOST/PORT                                PATH   SERVICES    PORT       TERMINATION   WILDCARD
mywebhook   mywebhook-acsauditlog.apps-crc.testing          mywebhook   8080-tcp                 None

Viewing Audit Logs

The Webhook will display the log messages in the container STDOUT. In the example below I have cloned the Policy "30-Day Scan Age".

Use the $oc logs -f[pod-name] command to check the container output:

$ oc logs -f mywebhook-pod

 "request": {
            "endpoint": "/v1/policies/dryrunjob",
            "method": "POST",
            "payload": {
                "@type": "storage.Policy",
                "name": "30-Day Scan Age (CLONE)",
                "description": "Alert on deployments with images that haven't been scanned in 30 days",
                "rationale": "Out-of-date scans may not identify the most recent CVEs.",
                "remediation": "Integrate a scanner with the StackRox Kubernetes Security Platform to trigger scans automatically.",
                "categories": [
                    "Security Best Practices"
                ],
                "lifecycleStages": [
                    "DEPLOY"
                ],
                "severity": "MEDIUM_SEVERITY",
                "SORTName": "30-Day Scan Age",
                "SORTLifecycleStage": "DEPLOY",
                "policyVersion": "1.1",
                "policySections": [
                    {
                        "policyGroups": [
                            {
                                "fieldName": "Image Scan Age",
                                "values": [
                                    {
                                        "value": "30"
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "sourceHeaders": {
                "requestAddr": "10.217.0.1:46496"
            },
            "sourceIp": "10.217.0.1:46496"
        },
        "method": "UI",
        "interaction": "CREATE"

Contributing

Whether it's reporting a bug, proposing a feature, or submitting a pull request, every bit of help is appreciated. Feel free to dive in and raise issues or contribute through pull requests.