Bsi Compliance Agent

BSI Compliance Agent

Deploys OPA Gatekeeper policies for BSI IT-Grundschutz compliance on OpenShift clusters. Covers SYS.1.6 (Containerisation) and APP.4.4 (Kubernetes) modules with BSI requirement labels.

Reference: https://access.redhat.com/articles/7045834

Step 1: Cluster Discovery

1.1 Get Cluster Version

Use: mcp__kubernetes__resources_get
Parameters: apiVersion=config.openshift.io/v1, kind=ClusterVersion, name=version

1.2 Check Gatekeeper Status

Use: mcp__kubernetes__namespaces_list
Check: "gatekeeper-system" or "openshift-gatekeeper-system" exists

1.3 Load BSI Mappings

Use references/BSI_IT_GRUNDSCHUTZ.md for requirement-to-policy mappings.

Step 2: SCC Analysis

2.1 Get SCCs

Use: mcp__kubernetes__resources_list
Parameters: apiVersion=security.openshift.io/v1, kind=SecurityContextConstraints

2.2 Get Pod SCC Distribution

Use: mcp__kubernetes__pods_list
Extract: metadata.annotations["openshift.io/scc"]
Calculate: percentage of pods using each SCC

2.3 Calculate Coverage

Use mapping from references/BSI_IT_GRUNDSCHUTZ.md:

• 95%+ restricted-v2: SKIP privileged, capabilities, host-namespace policies
• <95%: INCLUDE these policies
• 0% coverage: CRITICAL GAP (always include)

Step 3: Create Output Directory

TRACE_ID=$(python3 skills/bsi-compliance-agent/scripts/get_trace_id.py 2>/dev/null || echo "no-trace")
OUTPUT_DIR="skills/bsi-compliance-agent/assets/${TRACE_ID}"
mkdir -p ${OUTPUT_DIR}/{gatekeeperinstall,gatekeeperchecks,gatekeeperconfig,gatekeeperlibrary,bsi-constraints/{sys16,app44},placements}
cd ${OUTPUT_DIR}

Step 4: Download ch-stark Manifests

# Level 1: Gatekeeper Installation
curl -sL https://raw.githubusercontent.com/ch-stark/gatekeeper-examples/main/gatekeeperinstall/gatekeepersubscription.yaml \
  -o gatekeeperinstall/gatekeepersubscription.yaml

# Level 1: Gatekeeper Health Checks
curl -sL https://raw.githubusercontent.com/ch-stark/gatekeeper-examples/main/gatekeeperchecks/gatekeeper-ready.yaml \
  -o gatekeeperchecks/gatekeeper-ready.yaml

# Level 1: Gatekeeper Configuration
curl -sL https://raw.githubusercontent.com/ch-stark/gatekeeper-examples/main/gatekeeperconfig/config.yaml \
  -o gatekeeperconfig/config.yaml

# Level 2: Gatekeeper Library
cat <<'EOF' > gatekeeperlibrary/kustomization.yaml
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
  - https://github.com/open-policy-agent/gatekeeper-library/library
EOF

Step 5: Generate BSI-Labeled Constraints

5.1 BSI Label Schema

All constraints must include:

Labels: bsi-module: "SYS.1.6" or "APP.4.4" bsi-requirement: "A11" bsi-requirement-name: "resource-limits" compliance-framework: "bsi-it-grundschutz" severity: "critical" or "high" or "medium"

Annotations: bsi.compliance/module: "SYS.1.6" bsi.compliance/requirement: "A11" bsi.compliance/requirement-name: "Configuring Container Resources" bsi.compliance/level: "basic" or "elevated" policy.open-cluster-management.io/standards: "BSI IT-Grundschutz" policy.open-cluster-management.io/controls: "SYS.1.6.A11"

5.2 Generate Constraints by BSI Module

Use references/BSI_IT_GRUNDSCHUTZ.md for constraint examples.

SYS.1.6 Containerisation (bsi-constraints/sys16/):

• bsi-sys16-a11-resource-limits.yaml (ALWAYS INCLUDE)
• bsi-sys16-a15-readonly-rootfs.yaml (CRITICAL - ALWAYS INCLUDE)

APP.4.4 Kubernetes (bsi-constraints/app44/):

• bsi-app44-a9-allowed-registries.yaml (ALWAYS INCLUDE)
• bsi-app44-a9-image-digests.yaml (ALWAYS INCLUDE)
• bsi-app44-a10-required-labels.yaml (ALWAYS INCLUDE)

5.3 Priority Order

1. CRITICAL (0% SCC): k8spspreadonlyrootfilesystem (SYS.1.6.A15)
2. ALWAYS INCLUDE: resource limits, allowed repos, image digests, required labels
3. CONDITIONAL: Check SCC coverage before including

Step 6: Generate policyGenerator.yaml

apiVersion: policy.open-cluster-management.io/v1
kind: PolicyGenerator
metadata:
  name: bsi-it-grundschutz-compliance
placementBindingDefaults:
  name: bsi-compliance-binding
policyDefaults:
  namespace: policies
  placement:
    placementName: bsi-placement
  remediationAction: inform
  informGatekeeperPolicies: false
  pruneObjectBehavior: DeleteIfCreated
  ignorePending: true

policies:
  # LEVEL 1: Infrastructure
  - name: policy-install-gatekeeper
    manifests:
      - path: gatekeeperinstall
    remediationAction: enforce

  - name: policy-check-gatekeeper
    manifests:
      - path: gatekeeperchecks
    remediationAction: enforce
    dependencies:
      - name: "policy-install-gatekeeper"
        compliance: "Compliant"

  - name: policy-configure-gatekeeper
    manifests:
      - path: gatekeeperconfig
    remediationAction: enforce
    dependencies:
      - name: "policy-check-gatekeeper"
        compliance: "Compliant"

  # LEVEL 2: ConstraintTemplates
  - name: policy-gatekeeperlibrary
    manifests:
      - path: gatekeeperlibrary
    remediationAction: enforce
    dependencies:
      - name: "policy-check-gatekeeper"
        compliance: "Compliant"
    ignorePending: true

  # LEVEL 3: BSI Constraints
  - name: policy-bsi-sys16-containerisation
    manifests:
      - path: bsi-constraints/sys16
    dependencies:
      - name: "policy-gatekeeperlibrary"
        compliance: "Compliant"
    policyAnnotations:
      policy.open-cluster-management.io/standards: "BSI IT-Grundschutz"
      policy.open-cluster-management.io/categories: "Containerisation"
      policy.open-cluster-management.io/controls: "SYS.1.6.A11,SYS.1.6.A15"

  - name: policy-bsi-app44-kubernetes
    manifests:
      - path: bsi-constraints/app44
    dependencies:
      - name: "policy-gatekeeperlibrary"
        compliance: "Compliant"
    policyAnnotations:
      policy.open-cluster-management.io/standards: "BSI IT-Grundschutz"
      policy.open-cluster-management.io/categories: "Kubernetes"
      policy.open-cluster-management.io/controls: "APP.4.4.A9,APP.4.4.A10"

Step 7: Generate kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
generators:
  - policyGenerator.yaml

Step 8: Generate Placements

apiVersion: cluster.open-cluster-management.io/v1beta1
kind: Placement
metadata:
  name: bsi-placement
  namespace: policies
spec:
  predicates:
    - requiredClusterSelector:
        labelSelector:
          matchExpressions:
            - key: vendor
              operator: In
              values:
                - OpenShift
            - key: compliance
              operator: In
              values:
                - bsi-it-grundschutz

Step 9: Deploy

# Create namespace
kubectl create namespace policies --dry-run=client -o yaml | kubectl apply -f -

# Apply placements
kubectl apply -f placements/

# Label clusters for BSI compliance
kubectl label managedcluster <cluster-name> compliance=bsi-it-grundschutz

# Build and apply
kustomize build --enable-alpha-plugins . | kubectl apply -n policies -f -

Step 10: Verify BSI Labels

# List all BSI constraints
kubectl get constraints -l compliance-framework=bsi-it-grundschutz

# Query by BSI module
kubectl get constraints -l bsi-module=SYS.1.6
kubectl get constraints -l bsi-module=APP.4.4

# Query by requirement
kubectl get constraints -l bsi-requirement=A15

# Query by severity
kubectl get constraints -l severity=critical

Step 11: User Feedback

Ask user: "Any changes needed to the generated files?"

If user provides feedback:

1. Identify which file needs changes
2. Make the requested changes
3. Show updated file
4. Ask again until user confirms

Output Structure

assets/${TRACE_ID}/
├── kustomization.yaml
├── policyGenerator.yaml
├── gatekeeperinstall/
├── gatekeeperchecks/
├── gatekeeperconfig/
├── gatekeeperlibrary/
├── bsi-constraints/
│   ├── sys16/
│   │   ├── bsi-sys16-a11-resource-limits.yaml
│   │   └── bsi-sys16-a15-readonly-rootfs.yaml
│   └── app44/
│       ├── bsi-app44-a9-allowed-registries.yaml
│       ├── bsi-app44-a9-image-digests.yaml
│       └── bsi-app44-a10-required-labels.yaml
├── placements/
└── BSI_COMPLIANCE_REPORT.md

BSI Requirement to Constraint Mapping

SYS.1.6 Containerisation: A11 (Resource limits): k8scontainerlimits - ALWAYS INCLUDE A12 (No privileged): k8spspprivileged - SKIP (SCC 95%) A13 (Drop capabilities): k8spspcapabilities - SKIP (SCC 95%) A14 (Network isolation): k8srequiredlabels - ALWAYS INCLUDE A15 (Read-only FS): k8spspreadonlyrootfilesystem - CRITICAL GAP A16 (No host resources): k8spsphostnamespace - SKIP (SCC 95%)

APP.4.4 Kubernetes: A9 (Secure images): k8sallowedrepos, k8simageDigests - ALWAYS INCLUDE A10 (Secure config): k8srequiredlabels, k8srequiredannotations - ALWAYS INCLUDE A11 (Protect nodes): k8spsphostnamespace - SKIP (SCC 95%)

Reference Files

references/BSI_IT_GRUNDSCHUTZ.md

• BSI module mappings (SYS.1.6, APP.4.4)
• Requirement-to-policy mappings
• SCC coverage analysis
• BSI-labeled constraint examples

Trigger Phrases

• "Make my cluster BSI compliant"
• "Deploy BSI IT-Grundschutz policies"
• "Set up BSI compliance for OpenShift"
• "Apply German security standards to my cluster"

When to Use This Skill

Use for:

• BSI IT-Grundschutz compliance
• German federal security requirements
• SYS.1.6 and APP.4.4 module implementation

Do NOT use for:

• NIST 800-53 compliance -> use rhacm-unified-policy-agent
• Custom policy requirements -> use custom-rego-policy-generator