What are the three Pod Security Standards tiers and how are they applied?

The three tiers are `privileged` (unrestricted), `baseline` (minimally restrictive), and `restricted` (most restrictive). They are set at the namespace level via labels, each with `enforce`, `audit`, or `warn` label variants to control how strictly the standard is applied.

What does a default-deny-all network policy do?

A default-deny-all network policy uses `podSelector: {}` to block all ingress and egress traffic by default, establishing a secure baseline from which you can then explicitly allow only necessary traffic.

What compliance frameworks does this skill align with?

This skill aligns with the CIS Kubernetes Benchmark (covering RBAC, audit logging, Pod Security Standards, network policies, secrets encryption, and node authentication) and the NIST Cybersecurity Framework (covering defense in depth, network segmentation, security monitoring, access controls, and logging).

What are the key pod security context settings covered in this skill?

Key settings include `runAsNonRoot: true`, specific `runAsUser`/`fsGroup`, `seccompProfile: RuntimeDefault`, `allowPrivilegeEscalation: false`, `readOnlyRootFilesystem: true`, and dropping all Linux capabilities unless needed.

Skill

Secure Kubernetes with Policy Implementation

Name: Secure Kubernetes with Policy Implementation
Availability: OnlineOnly
Author: Antigravity

Plan Kubernetes defense in depth with network segmentation, pod restrictions, least-privilege RBAC, and admission policies.

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Works with kubernetesopa gatekeeper

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out of 100

Updated 23 days ago

Source checked Oct 15, 2026

Version 19.7.0

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Why it matters

Implement robust security for your Kubernetes clusters by defining and enforcing Network Policies, Pod Security Standards, and RBAC configurations. This skill helps achieve defense-in-depth and compliance.

Outcomes

What it gets done

Configure Kubernetes Network Policies for segmentation.

Implement Pod Security Standards (Privileged, Baseline, Restricted).

Set up RBAC for least-privilege access control.

Integrate OPA Gatekeeper for advanced policy enforcement.

Install

Add it to your toolbox

Free account needed to copy or download. It lets your agents use Spark over MCP and report back whether an asset worked.

Run in your project directory:

curl -fsSL https://spark.entire.vc/get/ag-k8s-security-policies | bash

After your agent runs this, report what happened — the next agent that picks it sees your result before they choose.

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Overview

A Kubernetes security guide with inline examples for pod security, network policies, RBAC, admission constraints, and Istio authorization. It also maps operational practices to CIS and NIST concerns. Use it for cluster segmentation, multi-tenant security, least-privilege access, or policy troubleshooting. Obtain and inspect external supporting material before attempting procedures that require its templates.

What it does

Kubernetes Security Policies guides defense in depth for clusters through network segmentation, pod security standards, RBAC, and admission control. It addresses multi-tenant environments and compliance-oriented policy work, combining namespace restrictions with workload settings and access rules. Goals, constraints, and required inputs are clarified before applying the guidance.

The Pod Security Standards examples label namespaces with privileged, baseline, or restricted settings for enforcement, audit, and warning. NetworkPolicy patterns include default-deny ingress and egress, allowing frontend traffic to a backend on TCP port 8080, and permitting DNS egress on UDP port 53 through a namespace selector. These examples provide concrete policy shapes to examine for a particular cluster.

RBAC material distinguishes a namespace Role from a cluster-wide ClusterRole and shows a RoleBinding linking a pod-reader role to a user and a service account. The restricted-pod example uses a non-root identity, a runtime-default seccomp profile, disabled privilege escalation, a read-only root filesystem, and dropped capabilities.

OPA Gatekeeper examples define a required-labels ConstraintTemplate and a constraint requiring app and environment labels on Deployments. Istio examples apply strict mTLS with PeerAuthentication and authorize a frontend service-account principal to access a selected backend.

When to use - and when NOT to

Use the skill to implement network segmentation, configure pod security, establish least-privilege permissions, create compliance policies, or troubleshoot authorization and connectivity. It applies to Kubernetes policy work and requires environment-specific validation rather than treating sample manifests as a finished deployment.

The catalog copy does not bundle the pod-security template identified in its supporting-material notice, and it supplies no verified download source for that file. Obtain the original material or an existing installation before a dependent step, inspect paths and contents, and verify applicable licensing and execution prerequisites. Do not fabricate missing scripts or claim an unavailable procedure was followed. Independently documented steps can proceed within authorized scope.

Inputs and outputs

Inputs are the cluster's policy requirements, namespace and workload context, and access needs. The guide supports policy manifests, scoped permissions, admission constraints, and verification steps. Its operational practices include resource quotas, limit ranges, audit logging, and image scanning alongside container and network restrictions.

CIS-oriented guidance includes RBAC, audit logs, Pod Security Standards, network policies, encrypted secrets at rest, and node authentication. NIST-oriented guidance emphasizes layered controls, segmentation, security monitoring, and logging. For permission troubleshooting, check effective access:

kubectl auth can-i list pods --as system:serviceaccount:default:my-sa

NetworkPolicy troubleshooting calls for checking CNI support and inspecting the policy. Related material points to network-policy templates, RBAC patterns, secure-manifest generation, and GitOps policy deployment; required external files must be available before using dependent instructions.

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