generated from coulomb/repo-seed
tegwick
ee794a61ab
namespaces/namespaces.yaml:
- sso, mfa, databases with net-kingdom/component labels for NetworkPolicy selectors
network-policies/{netpol-sso,netpol-mfa,netpol-databases}.yaml:
- Default-deny-all posture on all three namespaces
- sso: ingress from Traefik; egress to databases:5432 and mfa:8080
- mfa: ingress from Traefik + Keycloak; egress to databases:5432
- databases: ingress from sso/mfa + CNPG operator; egress to kube-dns + K8s API
- DNS (kube-system:53) allowed for all pods in all namespaces
cert-manager/issuers.yaml:
- selfsigned-issuer (ClusterIssuer) for internal/test use
- letsencrypt-prod (ClusterIssuer, HTTP-01/Traefik) — fill ACME_EMAIL before apply
cert-manager/test-certificate.yaml:
- 24h self-signed cert to smoke-test cert-manager
storage/verify-pvc.yaml:
- Test PVC + Pod to confirm default StorageClass provisioning
verify-t02.sh:
- Full verification script: namespaces, NetworkPolicies, issuers, certs, StorageClass
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
96 lines
3.4 KiB
Markdown
96 lines
3.4 KiB
Markdown
# T02 — K8s Foundations
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Phase 1 of NK-WP-0001: namespaces, NetworkPolicies, cert-manager, StorageClass.
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## Prerequisites
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- K3s cluster running (ThreePhoenix HA or single-node dev)
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- T01 Phase 0a complete (KeePassXC vault populated, ops bundle exported)
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- `kubectl` configured with cluster access
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## Apply order
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```bash
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# 1. Install cert-manager (if not already on cluster)
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helm repo add jetstack https://charts.jetstack.io
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helm repo update
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helm install cert-manager jetstack/cert-manager \
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--namespace cert-manager --create-namespace \
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--set crds.enabled=true
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# Wait for cert-manager to be ready
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kubectl rollout status deployment/cert-manager -n cert-manager
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# 2. Create namespaces
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kubectl apply -f namespaces/namespaces.yaml
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# 3. Apply NetworkPolicies
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kubectl apply -f network-policies/netpol-sso.yaml
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kubectl apply -f network-policies/netpol-mfa.yaml
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kubectl apply -f network-policies/netpol-databases.yaml
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# 4. Create ClusterIssuers
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# Edit issuers.yaml first: replace ACME_EMAIL with your address
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kubectl apply -f cert-manager/issuers.yaml
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# 5. Verify cert-manager with test certificate
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kubectl apply -f cert-manager/test-certificate.yaml
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kubectl wait --for=condition=Ready certificate/selfsigned-test \
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-n cert-manager-test --timeout=60s
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kubectl delete namespace cert-manager-test
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# 6. Verify StorageClass
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kubectl apply -f storage/verify-pvc.yaml
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kubectl wait --for=condition=Ready pod/storage-test \
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-n storage-test --timeout=60s
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kubectl logs -n storage-test storage-test
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kubectl delete namespace storage-test
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# 7. Run the full verification script
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chmod +x verify-t02.sh
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./verify-t02.sh
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```
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## NetworkPolicy design
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All three namespaces follow a default-deny-all posture. Only the minimal
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required paths are opened:
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| Source | Destination | Port | Purpose |
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|--------|-------------|------|---------|
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| Traefik (kube-system) | Keycloak (sso) | 8080 | OIDC/SAML ingress |
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| Traefik (kube-system) | privacyIDEA (mfa) | 8080 | MFA portal ingress |
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| Keycloak (sso) | privacyIDEA (mfa) | 8080 | Provider API calls |
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| Keycloak (sso) | PostgreSQL (databases) | 5432 | DB |
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| privacyIDEA (mfa) | PostgreSQL (databases) | 5432 | DB |
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| CNPG operator (cnpg-system) | PostgreSQL (databases) | 5432/9187 | Operator + metrics |
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| All pods | kube-dns (kube-system) | 53 | DNS resolution |
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| CNPG pods | K8s API | 6443 | Status updates |
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## Verifying denied paths (manual)
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After applying NetworkPolicies, confirm that illegal paths are blocked:
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```bash
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# Test: Keycloak → databases direct (should be ALLOWED)
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kubectl run test-allowed -n sso --rm -it --image=busybox --restart=Never \
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-- nc -zv net-kingdom-pg-rw.databases.svc.cluster.local 5432
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# Test: mfa → sso (should be DENIED — privacyIDEA must not reach Keycloak directly)
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kubectl run test-denied -n mfa --rm -it --image=busybox --restart=Never \
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-- nc -zv -w3 keycloak.sso.svc.cluster.local 8080
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# Test: databases → sso (should be DENIED — DB pods must not initiate connections)
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kubectl run test-denied2 -n databases --rm -it --image=busybox --restart=Never \
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-- nc -zw3 keycloak.sso.svc.cluster.local 8080
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```
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## Notes
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- `net-kingdom/component` labels on namespaces are used by NetworkPolicy
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`namespaceSelector` rules. Do not remove them.
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- `cnpg.io/cluster: net-kingdom-pg` in `netpol-databases.yaml` must match
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the name of the CloudNativePG `Cluster` CR you create in T03.
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- The `letsencrypt-prod` ClusterIssuer requires public DNS and port 80 open
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to Let's Encrypt servers. Update `ACME_EMAIL` before applying.
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