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Kubernetes Security — Hardening

22. 08. 2025 1 Min. Lesezeit intermediate

Cloud Expert

Kubernetes Security — Hardening

KubernetesSecurityRBACPod Security 5 min čtení

Pod Security Standards, network policies, image scanning a RBAC.

Pod Security Standards

apiVersion: v1
kind: Namespace
metadata:
  name: production
  labels:
    pod-security.kubernetes.io/enforce: restricted

runAsNonRoot, drop ALL capabilities, readOnlyRootFilesystem, seccompProfile: RuntimeDefault.

Network Policies

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny-all
spec:
  podSelector: {}
  policyTypes: [Ingress, Egress]

Default deny + allow specific = microsegmentation.

Image Security

  • Distroless/scratch base images
  • Trivy scan v CI — trivy image --severity HIGH,CRITICAL --exit-code 1
  • Cosign + Kyverno pro signed images

Shrnutí

K8s security = layers: PSS + Network Policies + RBAC + image scanning. Defense in depth.

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