security(wave1): W1.1 audit-log shipping LIVE + W1.5 trusted-registries Enforce LIVE
## W1.1 — K8s API audit log shipping (LIVE)
- alloy.yaml: added control-plane toleration so Alloy DaemonSet runs on
k8s-master node. Verified alloy-7zg7t scheduled on master, tailing
/var/log/kubernetes/audit.log
- loki.tf "Security Wave 1" rule group: added K2-K9 alert rules
(skipped K1 per Q7 decision):
- K2 K8sSATokenFromUnexpectedIP
- K3 K8sSensitiveSecretReadByUnexpectedActor
- K4 K8sExecIntoSensitiveNamespace
- K5 K8sMassDelete (>5 Pod/Secret/CM in 60s by single user)
- K6 K8sAuditPolicyModified (kubeadm-config CM change)
- K7 K8sClusterRoleWildcardCreated (verbs=* + resources=*)
- K8 K8sAnonymousBindingGranted
- K9 K8sViktorFromUnexpectedIP
- All rules use source-IP regex matching the wave-1 allowlist
(10.0.20.0/22, 192.168.1.0/24, 10.10.0.0/16 pod, 10.96.0.0/12 svc,
100.64-127 tailnet) and `lane = "security"` → #security Slack route.
- Verified: kubectl-audit logs flowing in Loki query
{job="kubernetes-audit"} returns events with node=k8s-master.
- Verified: /loki/api/v1/rules lists all K2-K9 + V1-V7 + S1.
## W1.5 — require-trusted-registries Enforce (LIVE)
- security-policies.tf: flipped Audit→Enforce with explicit allowlist
built by `kubectl get pods -A -o jsonpath='{..image}'` enumeration.
- Removed `*/*` catch-all (which made Audit→Enforce a no-op).
- Pattern includes 15 explicit registries, 6 DockerHub library bare
names, 56 DockerHub user repos.
- Verified by admission dry-run:
- evilcorp.example/malware:v1 → BLOCKED with custom message
- alpine:3.20 → ALLOWED (matches `alpine*`)
- docker.io/library/alpine:3.20 → ALLOWED (matches `docker.io/*`)
## W1.6 — Calico flow logs (BLOCKED — Calico OSS limitation)
- Tried adding FelixConfiguration with flowLogsFileEnabled=true via
kubectl_manifest in stacks/calico/main.tf
- Calico OSS rejected with "strict decoding error: unknown field
spec.flowLogsFileEnabled" — these fields are Calico Enterprise/Tigera-only
- Removed the failed resource. Documented alternative paths in main.tf
comment block: GNP with action=Log (iptables NFLOG → journal), Cilium
migration, eBPF tooling, or Tigera Operator adoption.
## Docs updates
- security.md status table refreshed: W1.1/W1.2/W1.3/W1.4/W1.5 LIVE,
W1.6/W1.7 blocked
- monitoring.md: Loki marked DEPLOYED (was incorrectly NOT-DEPLOYED in
prior session before today's apply)
## Cleanup
- Removed stacks/kyverno/imports.tf (TF 1.5+ import blocks completed
their job in the 2026-05-18 apply; should not stay in tree per TF docs)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Viktor Barzin
a048b37f60