102 lines
4.5 KiB
YAML
102 lines
4.5 KiB
YAML
# =============================================================================
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# L2 BEHAVIORAL — DNS auto-record / exposure (R-DNS-02) [RUNNABLE]
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# Catalog: docs/14 "DNS/exposure (R-DNS-*)"
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# Spec: docs/09 (ExternalDNS auto-manages records; split-horizon foundation)
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#
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# GIVEN a LoadBalancer Service annotated with an external-dns hostname,
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# WHEN ExternalDNS reconciles (source=service, provider=cloudflare, policy=sync),
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# THEN a PUBLIC DNS record for that hostname is auto-created, pointing at the
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# Service's Cilium-assigned LB IP (R-DNS-02). The record resolves to the
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# cluster LB IP (Cilium L2 `shared` pool 192.168.1.53-.60), i.e. clients reach the cluster endpoint.
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#
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# CLEANUP: chainsaw deletes the per-test namespace (Service included) at teardown;
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# ExternalDNS policy=sync then REMOVES the record from Cloudflare on its next pass.
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# This test creates a real record in the live keithjackson.dev zone (operator-approved).
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#
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# SCOPE: asserts R-DNS-02 (auto-managed record appears) concretely. R-DNS-01/03
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# (split-horizon internal-vs-external resolution) need the internal resolver and
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# are covered separately.
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# =============================================================================
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apiVersion: chainsaw.kyverno.io/v1alpha1
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kind: Test
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metadata:
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name: dns-exposure
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labels:
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conformance.home.k3s/R-DNS-02: "true"
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annotations:
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conformance.home.k3s/requirements: "R-DNS-02"
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conformance.home.k3s/layer: "L2"
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conformance.home.k3s/safety-critical: "false"
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conformance.home.k3s/executable: "true"
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conformance.home.k3s/intent: >-
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A LoadBalancer Service annotated with an external-dns hostname gets a public
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DNS record auto-created by ExternalDNS (Cloudflare), resolving to its LB IP.
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spec:
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# ExternalDNS reconcile + Cloudflare propagation can take a couple of minutes;
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# widen the assert/exec windows for this test only.
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timeouts:
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apply: 90s
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assert: 5m
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exec: 6m
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steps:
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- name: given-a-service-requesting-a-dns-name
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try:
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- apply:
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resource:
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apiVersion: v1
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kind: Service
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metadata:
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name: dns-probe-svc
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annotations:
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external-dns.alpha.kubernetes.io/hostname: conformance-dns.home.keithjackson.dev
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spec:
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type: LoadBalancer
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# No real backend needed — Cilium LB-IPAM assigns a VIP regardless, and
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# ExternalDNS creates the record from the Service's LB IP + annotation.
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selector:
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app: dns-probe-no-such-backend
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ports:
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- name: http
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port: 80
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targetPort: 80
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- name: then-externaldns-creates-the-public-record
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try:
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- apply:
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resource:
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: dns-verify
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spec:
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backoffLimit: 2
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activeDeadlineSeconds: 330
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template:
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spec:
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restartPolicy: Never
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containers:
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- name: probe
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image: busybox:1.36.1
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command:
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- sh
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- -c
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- |
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set -u
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host="conformance-dns.home.keithjackson.dev"
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# Poll PUBLIC DNS (1.1.1.1) until the auto-created A record appears and
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# points into the cluster LB range (Cilium L2 `shared` pool 192.168.1.53-.60). Proves ExternalDNS created it.
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for i in $(seq 1 28); do
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ip="$(nslookup "$host" 1.1.1.1 2>/dev/null | grep -oE '192\.168\.1\.(5[3-9]|60)' | head -1)"
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if [ -n "$ip" ]; then echo "RECORD_FOUND $host -> $ip"; exit 0; fi
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echo "poll $i: record not yet published"; sleep 10
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done
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echo "FAIL: ExternalDNS did not publish the record within timeout"; exit 1
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- assert:
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resource:
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apiVersion: batch/v1
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kind: Job
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metadata: { name: dns-verify }
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status: { succeeded: 1 }
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finally:
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- script:
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content: 'echo "teardown: chainsaw deletes the namespace/Service; ExternalDNS policy=sync removes the Cloudflare record"'
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