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53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
# API Reference: Implementing Kubernetes Pod Security Standards
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## PSA Namespace Labels
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```bash
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# Apply restricted enforcement
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kubectl label namespace production \
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pod-security.kubernetes.io/enforce=restricted \
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pod-security.kubernetes.io/audit=restricted \
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pod-security.kubernetes.io/warn=restricted --overwrite
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```
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## Pod Security Standard Levels
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| Level | Description | Blocks |
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|-------|-------------|--------|
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| Privileged | Unrestricted | Nothing |
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| Baseline | Minimally restrictive | hostNetwork, privileged, hostPID/IPC |
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| Restricted | Heavily restricted | + runAsNonRoot, drop ALL caps, seccomp |
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## PSA Modes
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| Mode | Behavior |
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|------|----------|
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| enforce | Reject violating pods |
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| audit | Log violations (allow pod) |
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| warn | Warn user (allow pod) |
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## Baseline Violations
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| Field | Forbidden Value |
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|-------|----------------|
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| `spec.hostNetwork` | true |
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| `spec.hostPID` | true |
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| `spec.hostIPC` | true |
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| `containers[*].securityContext.privileged` | true |
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| `containers[*].securityContext.capabilities.add` | Non-default |
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## Restricted Violations (adds to Baseline)
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| Field | Required |
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|-------|----------|
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| `runAsNonRoot` | true |
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| `allowPrivilegeEscalation` | false |
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| `capabilities.drop` | ["ALL"] |
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| `seccompProfile.type` | RuntimeDefault or Localhost |
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### References
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- K8s PSS: https://kubernetes.io/docs/concepts/security/pod-security-standards/
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- PSA: https://kubernetes.io/docs/concepts/security/pod-security-admission/
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- Migrate from PSP: https://kubernetes.io/docs/tasks/configure-pod-container/migrate-from-psp/
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