feat(cluster-apps): manage tunnel-fronted CNAMEs in TF

README.md

@@ -26,6 +26,7 @@ No modules.
 | [cloudflare_dns_record.api](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
 | [cloudflare_dns_record.apps](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
 | [cloudflare_dns_record.apps_wildcard](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
+| [cloudflare_dns_record.cluster_apps](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
 | [cloudflare_dns_record.mx_primary](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
 | [cloudflare_dns_record.mx_secondary](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
 | [cloudflare_dns_record.onion](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/dns_record) | resource |
@@ -49,6 +50,7 @@ No modules.
 | [cloudflare_zone_setting.minify](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/zone_setting) | resource |
 | [cloudflare_zone_setting.polish](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/zone_setting) | resource |
 | [cloudflare_zone_setting.rocket_loader](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/zone_setting) | resource |
+| [cloudflare_zero_trust_tunnel_cloudflared.cluster_apps](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/data-sources/zero_trust_tunnel_cloudflared) | data source |
 | [cloudflare_zone.makeitwork_cloud](https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/data-sources/zone) | data source |
 | [sops_file.secret_vars](https://registry.terraform.io/providers/carlpett/sops/latest/docs/data-sources/file) | data source |
 

cf-tunnels.tf

@@ -2,8 +2,39 @@
 #
 # The cluster-apps tunnel is created and owned by cloudflare-operator
 # (see kustomize-cluster/operators/cloudflare/cluster-tunnel.yaml). Tunnel
-# credentials live in the cluster's Secret. DNS records for app endpoints
-# are reconciled by TunnelBinding resources, not managed here.
+# credentials live in the cluster's Secret. CNAME records for the apps
+# fronted by that tunnel are managed below.
+
+# Look up the cluster-apps tunnel by name so DNS records can target it
+# without hard-coding a UUID that changes if the operator recreates it.
+data "cloudflare_zero_trust_tunnel_cloudflared" "cluster_apps" {
+  account_id = local.account_id
+  filter = {
+    name = "cluster-apps-k3s"
+  }
+}
+
+# Hostnames fronted by the cluster-apps tunnel. The TunnelBinding in
+# kustomize-cluster picks up traffic for each FQDN; this CNAME just tells
+# Cloudflare's edge which tunnel to route requests through.
+locals {
+  cluster_apps_hostnames = [
+    "argocd",
+    "grafana",
+    "status",
+    "ansible",
+  ]
+}
+
+resource "cloudflare_dns_record" "cluster_apps" {
+  for_each = toset(local.cluster_apps_hostnames)
+  zone_id  = local.zone_id
+  type     = "CNAME"
+  name     = each.value
+  content  = "${data.cloudflare_zero_trust_tunnel_cloudflared.cluster_apps.id}.cfargotunnel.com"
+  proxied  = true
+  ttl      = 1
+}
 
 resource "cloudflare_zero_trust_tunnel_cloudflared" "warp" {
   account_id = local.account_id