fix(conformance): trusted-tls verifies LE-prod cert via system trust + split-horizon DNS (R-TLS-01/03)
Rewrote the probe for the LE-production switch: no embedded staging root, no --cacert (system CA bundle validates ISRG Root X1), resolves the hostname via in-cluster split-horizon DNS to the Gateway VIP (the real-client path). PASSES live (9s). Removed the le-staging-root-ca fixture.
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@@ -4,18 +4,20 @@
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# Spec: docs/09 (Gateway API + DNS-01 wildcard), ADR-0006 (LE issuers)
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#
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# GIVEN the shared Gateway terminating TLS with the cert-manager wildcard cert,
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# WHEN a probe dials it (SNI *.home.keithjackson.dev) and verifies the chain,
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# THEN the served cert is non-self-signed, unexpired, covers the wildcard SAN,
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# and CHAINS TO A REAL CA ROOT (R-TLS-01). The wildcard SAN also covers
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# internal-only hostnames, so internal services get the same trusted cert
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# (R-TLS-03).
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# WHEN an in-cluster probe dials it by hostname (SNI *.home.keithjackson.dev) and
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# verifies the chain against the SYSTEM trust store,
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# THEN the served cert is non-self-signed, unexpired, covers the wildcard SAN, and
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# chains to a PUBLICLY-TRUSTED CA root (R-TLS-01). The wildcard SAN also covers
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# internal-only hostnames, so internal services get the same trusted cert (R-TLS-03).
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#
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# TRUST MODEL (operator decision "A", DECISIONS-LOG): dev issues from Let's
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# Encrypt **STAGING** (ADR-0006, to avoid prod rate limits) — a real CA, but not
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# in the system trust store. So the probe verifies the chain against the LE
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# STAGING root (fixtures/le-staging-root-ca.yaml, "(STAGING) Pretend Pear X1"),
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# which is the faithful "chains to a trusted root" check for this environment.
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# A prod overlay (LE-prod) would verify against the system store instead.
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# TRUST MODEL: the cluster issues from Let's Encrypt **PRODUCTION** (ACME_CLUSTER_ISSUER
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# = letsencrypt-prod), whose root (ISRG Root X1) is in the system trust store — so the
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# probe verifies against the container's DEFAULT CA bundle (no --cacert). A clean verify
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# is exactly what real in-cluster OIDC clients (oauth2-proxy, Grafana) depend on. The
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# probe resolves the hostname via in-cluster split-horizon DNS (coredns-custom → Gateway
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# VIP, R-DNS-01) — the same path real clients use — so no --connect-to hack is needed.
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# Replaced the earlier LE-staging + embedded-root check when dev switched to LE-prod so
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# in-cluster SSO clients trust the cert (DECISIONS-LOG Session 7).
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# =============================================================================
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apiVersion: chainsaw.kyverno.io/v1alpha1
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kind: Test
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@@ -31,14 +33,10 @@ metadata:
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conformance.home.k3s/executable: "true"
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conformance.home.k3s/intent: >-
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The shared Gateway serves a valid, unexpired, non-self-signed wildcard cert
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that chains to a real CA root (LE-staging in dev); the wildcard SAN covers
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internal-only hostnames too.
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that chains to a publicly-trusted CA root (LE production); the wildcard SAN
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covers internal-only hostnames too.
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spec:
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steps:
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- name: given-le-staging-root-trust-anchor
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try:
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- apply:
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file: fixtures/le-staging-root-ca.yaml
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- name: then-gateway-cert-chains-to-trusted-root
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try:
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- apply:
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@@ -49,39 +47,29 @@ spec:
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name: tls-probe
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spec:
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backoffLimit: 4
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activeDeadlineSeconds: 120
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activeDeadlineSeconds: 180
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template:
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spec:
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restartPolicy: Never
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volumes:
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- name: ca
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configMap:
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name: le-staging-root
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containers:
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- name: probe
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image: curlimages/curl:8.11.1
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volumeMounts:
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- name: ca
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mountPath: /ca
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readOnly: true
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command:
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- sh
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- -c
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- |
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set -eu
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gw="cilium-gateway-shared.gateway.svc.cluster.local"
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# Probe TWO wildcard hostnames — one "public", one "internal-only". Both
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# match *.home.keithjackson.dev, so a clean verify against the LE-staging
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# root for BOTH proves R-TLS-01 (chains to a real CA root) AND R-TLS-03
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# (the same trusted wildcard covers internal-only names).
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# --connect-to sends SNI/Host=$host but DIALS the gateway Service by name
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# (env-agnostic — no hardcoded VIP). curl (no -f) exits 0 on the gateway's
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# 404 once TLS+hostname verify; it exits 60 if the chain/hostname fails
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# (verified empirically), so `set -e` + rc=0 is the assertion. TLS
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# terminates at the gateway before HTTP routing, so no backend is needed.
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# match *.home.keithjackson.dev, so a clean verify against the SYSTEM CA
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# bundle for BOTH proves R-TLS-01 (chains to a publicly-trusted root) AND
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# R-TLS-03 (the same trusted wildcard covers internal-only names). Names
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# resolve via in-cluster split-horizon DNS to the Gateway VIP. curl (no
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# --cacert, no -k) validates against the default CA bundle and exits 0 on
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# the gateway's 404 once TLS+hostname verify; it exits 60 if the chain or
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# hostname fails. TLS terminates at the gateway before HTTP routing, so no
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# backend is needed.
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for host in conformance.home.keithjackson.dev internal-only.home.keithjackson.dev; do
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curl -sS --cacert /ca/root.pem \
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--connect-to "${host}:443:${gw}:443" \
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curl -sS --retry 5 --retry-connrefused --retry-delay 3 --max-time 20 \
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-o /dev/null "https://${host}/"
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echo "TLS_TRUSTED ${host}"
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done
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@@ -1,38 +0,0 @@
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apiVersion: v1
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data:
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root.pem: |
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-----BEGIN CERTIFICATE-----
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MIIFmDCCA4CgAwIBAgIQU9C87nMpOIFKYpfvOHFHFDANBgkqhkiG9w0BAQsFADBm
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MQswCQYDVQQGEwJVUzEzMDEGA1UEChMqKFNUQUdJTkcpIEludGVybmV0IFNlY3Vy
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aXR5IFJlc2VhcmNoIEdyb3VwMSIwIAYDVQQDExkoU1RBR0lORykgUHJldGVuZCBQ
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ZWFyIFgxMB4XDTE1MDYwNDExMDQzOFoXDTM1MDYwNDExMDQzOFowZjELMAkGA1UE
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BhMCVVMxMzAxBgNVBAoTKihTVEFHSU5HKSBJbnRlcm5ldCBTZWN1cml0eSBSZXNl
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YXJjaCBHcm91cDEiMCAGA1UEAxMZKFNUQUdJTkcpIFByZXRlbmQgUGVhciBYMTCC
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AiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBALbagEdDTa1QgGBWSYkyMhsc
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ZXENOBaVRTMX1hceJENgsL0Ma49D3MilI4KS38mtkmdF6cPWnL++fgehT0FbRHZg
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jOEr8UAN4jH6omjrbTD++VZneTsMVaGamQmDdFl5g1gYaigkkmx8OiCO68a4QXg4
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wSyn6iDipKP8utsE+x1E28SA75HOYqpdrk4HGxuULvlr03wZGTIf/oRt2/c+dYmD
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oaJhge+GOrLAEQByO7+8+vzOwpNAPEx6LW+crEEZ7eBXih6VP19sTGy3yfqK5tPt
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TdXXCOQMKAp+gCj/VByhmIr+0iNDC540gtvV303WpcbwnkkLYC0Ft2cYUyHtkstO
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fRcRO+K2cZozoSwVPyB8/J9RpcRK3jgnX9lujfwA/pAbP0J2UPQFxmWFRQnFjaq6
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rkqbNEBgLy+kFL1NEsRbvFbKrRi5bYy2lNms2NJPZvdNQbT/2dBZKmJqxHkxCuOQ
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FjhJQNeO+Njm1Z1iATS/3rts2yZlqXKsxQUzN6vNbD8KnXRMEeOXUYvbV4lqfCf8
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mS14WEbSiMy87GB5S9ucSV1XUrlTG5UGcMSZOBcEUpisRPEmQWUOTWIoDQ5FOia/
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GI+Ki523r2ruEmbmG37EBSBXdxIdndqrjy+QVAmCebyDx9eVEGOIpn26bW5LKeru
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mJxa/CFBaKi4bRvmdJRLAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB
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Af8EBTADAQH/MB0GA1UdDgQWBBS182Xy/rAKkh/7PH3zRKCsYyXDFDANBgkqhkiG
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9w0BAQsFAAOCAgEAncDZNytDbrrVe68UT6py1lfF2h6Tm2p8ro42i87WWyP2LK8Y
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nLHC0hvNfWeWmjZQYBQfGC5c7aQRezak+tHLdmrNKHkn5kn+9E9LCjCaEsyIIn2j
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qdHlAkepu/C3KnNtVx5tW07e5bvIjJScwkCDbP3akWQixPpRFAsnP+ULx7k0aO1x
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qAeaAhQ2rgo1F58hcflgqKTXnpPM02intVfiVVkX5GXpJjK5EoQtLceyGOrkxlM/
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sTPq4UrnypmsqSagWV3HcUlYtDinc+nukFk6eR4XkzXBbwKajl0YjztfrCIHOn5Q
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CJL6TERVDbM/aAPly8kJ1sWGLuvvWYzMYgLzDul//rUF10gEMWaXVZV51KpS9DY/
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5CunuvCXmEQJHo7kGcViT7sETn6Jz9KOhvYcXkJ7po6d93A/jy4GKPIPnsKKNEmR
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xUuXY4xRdh45tMJnLTUDdC9FIU0flTeO9/vNpVA8OPU1i14vCz+MU8KX1bV3GXm/
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fxlB7VBBjX9v5oUep0o/j68R/iDlCOM4VVfRa8gX6T2FU7fNdatvGro7uQzIvWof
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gN9WUwCbEMBy/YhBSrXycKA8crgGg3x1mIsopn88JKwmMBa68oS7EHM9w7C4y71M
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7DiA+/9Qdp9RBWJpTS9i/mDnJg1xvo8Xz49mrrgfmcAXTCJqXi24NatI3Oc=
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-----END CERTIFICATE-----
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kind: ConfigMap
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metadata:
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name: le-staging-root
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