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Polaris

by Fairwinds

Open-source Kubernetes configuration audit tool that checks workloads against security and best-practice policies via CLI, webhook, or web dashboard.

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AIMenta verdict
Decent fit
4/5

"Open-source Kubernetes configuration validation — APAC platform teams use Polaris to audit APAC workloads against security and best-practice policies (resource limits, security context, health probes) via CLI, admission webhook, or dashboard."

Features
6
Use cases
1
Watch outs
3
What it does

Key features

  • Built-in policy library: resource limits, security context, health probes, image tags
  • Three deployment modes: CLI audit, admission webhook, and web dashboard
  • YAML-based custom check configuration without Rego
  • Per-workload compliance scoring and severity classification
  • CI/CD integration with configurable failure thresholds
  • Helm chart and Kubernetes manifest analysis
When to reach for it

Best for

  • APAC platform teams starting their Kubernetes governance journey who want immediate policy coverage from built-in checks without writing custom Rego policies.
Don't get burned

Limitations to know

  • ! Built-in policy library is opinionated — may conflict with APAC team conventions
  • ! Custom policy extensibility is limited compared to full Rego (Conftest/Gatekeeper)
  • ! Dashboard requires separate deployment; CLI output less rich than commercial alternatives
Context

About Polaris

Polaris is an open-source Kubernetes configuration validation tool from Fairwinds that audits APAC cluster workloads against a curated set of security and operational best-practice policies. Unlike Conftest and Gatekeeper which require APAC teams to write custom Rego policies, Polaris ships with a comprehensive built-in policy library covering the most critical Kubernetes configuration mistakes: missing resource requests/limits, missing liveness and readiness probes, containers running as root, missing security context configurations, and deprecated Kubernetes API versions.

APAC platform teams can use Polaris in three modes: as a CLI tool for one-off audits or CI/CD integration, as a Kubernetes admission webhook that blocks or warns on non-compliant resources, and as a web dashboard that provides a visual overview of the APAC cluster's policy compliance posture with per-workload scoring.

Polaris supports custom checks via YAML configuration, allowing APAC teams to extend the built-in library with organization-specific rules without learning Rego. The tool's accessibility makes it a practical starting point for APAC platform teams establishing their first Kubernetes governance posture — teams can begin auditing immediately with sensible defaults and graduate to Gatekeeper for advanced custom policy needs as their maturity increases.

Beyond this tool

Where this category meets practice depth.

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