PolicyReporter

Motivation

Kyverno ships with two types of validation. You can either enforce a rule or audit it. If you don't want to block developers or if you want to try out a new rule, you can use the audit functionality. The audit configuration creates PolicyReports which you can access with kubectl. Because I can't find a simple solution to get a general overview of this PolicyReports and PolicyReportResults, I created this tool to send information from PolicyReports to different targets like Grafana Loki, Elasticsearch or Slack. This tool provides by default an HTTP server with Prometheus Metrics on http://localhost:2112/metrics about ReportPolicy Summaries and ReportPolicyRules.

This project is in an early stage. Please let me know if anything did not work as expected or if you want to send your audits to other targets then Loki.

Getting Started

• Installation with Helm v3
  • Grafana Loki
  • Elasticsearch
  • Slack
  • Discord
  • Customization
• Configure Policy Priorities
• Configure Monitoring

Installation with Helm v3

Installation via Helm Repository

Add the Helm repository

helm repo add policy-reporter https://fjogeleit.github.io/policy-reporter
helm repo update

Basic Installation - Provides Prometheus Metrics

helm install policy-reporter policy-reporter/policy-reporter -n policy-reporter --create-namespace

Example

Installation with Loki

helm install policy-reporter policy-reporter/policy-reporter --set loki.host=http://loki:3100 -n policy-reporter --create-namespace

Additional configurations for Loki

• Configure loki.minimumPriority to send only results with the configured minimumPriority or above, empty means all results. (info < warning < error)
• Configure loki.skipExistingOnStartup to skip all results who already existed before the PolicyReporter started (default: true).

loki:
  host: ""
  minimumPriority: ""
  skipExistingOnStartup: true

Example

Installation with Elasticsearch

helm install policy-reporter policy-reporter/policy-reporter --set elasticsearch.host=http://elasticsearch:3100 -n policy-reporter --create-namespace

Additional configurations for Elasticsearch

• Configure elasticsearch.index to customize the elasticsearch index.
• Configure elasticsearch.rotation is added as suffix to the index. Possible values are daily, monthly, annually and none.
• Configure elasticsearch.minimumPriority to send only results with the configured minimumPriority or above, empty means all results. (info < warning < error)
• Configure elasticsearch.skipExistingOnStartup to skip all results who already existed before the PolicyReporter started (default: true).

elasticsearch:
  host: ""
  index: "policy-reporter"
  rotation: "daily"
  minimumPriority: ""
  skipExistingOnStartup: true

Example

Installation with Slack

helm install policy-reporter policy-reporter/policy-reporter --set slack.webhook=http://hook.slack -n policy-reporter --create-namespace

Additional configurations for Slack

• Configure slack.minimumPriority to send only results with the configured minimumPriority or above, empty means all results. (info < warning < error)
• Configure slack.skipExistingOnStartup to skip all results who already existed before the PolicyReporter started (default: true).

slack:
  webhook: ""
  minimumPriority: ""
  skipExistingOnStartup: true

Example

Installation with Discord

helm install policy-reporter policy-reporter/policy-reporter --set discord.webhook=http://hook.discord -n policy-reporter --create-namespace

Additional configurations for Discord

• Configure discord.minimumPriority to send only results with the configured minimumPriority or above, empty means all results. (info < warning < error)
• Configure discord.skipExistingOnStartup to skip all results who already existed before the PolicyReporter started (default: true).

discord:
  webhook: ""
  minimumPriority: ""
  skipExistingOnStartup: true

Example

Customization

You can combine multiple targets by setting the required host or webhook configuration for your targets of choice. For all possible configurations checkout the ./charts/policy-reporter/values.yaml to change any available configuration.

Configure Policy Priorities

By default kyverno PolicyReports has no priority or severity for policies. So every passed rule validation will be processed as notice, a failed validation is processed as error. To customize this you can configure a mapping from policies to fail priorities. So you can send them as debug, info or warnings instead of errors. To configure the priorities create a ConfigMap in the policy-reporter namespace with the name policy-reporter-priorities. Configure each priority as value with the Policyname as key and the Priority as value. This Configuration is loaded and synchronized during runtime. Any change to this configmap will automaticly synchronized, no new deployment needed.

A special Policyname default is supported. The default configuration can be used to set a global default priority instead of error.

kubectl create configmap policy-reporter-priorities --from-literal check-label-app=warning --from-literal require-ns-labels=warning -n policy-reporter

apiVersion: v1
kind: ConfigMap
metadata:
  name: policy-reporter-priorities
  namespace: policy-reporter
data:
  default: debug
  check-label-app: warning
  require-ns-labels: warning

Monitoring

The Helm Chart includes optional Manifests for the MonitoringStack. The provided Dashboard works without Loki

• Enable a ServiceMonitor by setting metrics.serviceMonitor.enabled to true.
  • With metrics.serviceMonitor.labels you can add additional labels to the ServiceMonitor. This helps to match the serviceMonitorSelector configuration of your Prometheus resource
• Enable a basic Dashboard as ConfigMap by setting metrics.dashboard.enabled to true.
  • Change the namespace to your required monitoring namespace by changing metrics.dashboard.namespace (default: cattle-dashboards)

If you are not using the MonitoringStack you can import the dashboard from Grafana

Example Installation

helm install policy-reporter policy-reporter/policy-reporter --set metrics.serviceMonitor=true --set metrics.dashboard.enabled=true -n policy-reporter --create-namespace

Dashboard Preview

Todos

• Support for ClusterPolicyReports
• Additional Targets
• Filter