Replace DNS-flip failover watcher with static vps.huskypup.net subdomains

The DNS-flip watcher (scripts/vps-dns-failover/) was designed but never
actually installed on the VPS despite being tracked as done - real gap,
found when asked whether the standby services are actually reachable.

New design: instead of dynamically flipping *.kube.huskypup.net between
home and VPS IPs, give the VPS site its own permanent, always-resolving
subdomain - vault/gitea/auth/n8n/nextcloud.vps.huskypup.net, each with
real Ingress+TLS on the VPS's own Traefik+cert-manager (both already
installed by Phase 0 bootstrap, just never wired up). No token-scoping
decision needed since there's no dynamic flipping - reuses the same
cert-manager token pattern as home.

Also scales Authentik/n8n/Nextcloud from 0 to 1 replica on the VPS so
the replicated data is actually browsable at all times, not just
present-but-unreachable. Their CNPG clusters are still read-only
replicas (spec.replica.enabled: true) - writes will error until a
deliberate manual promotion, but reads/browsing work now. Vault and
Gitea were already running continuously.

argocd-apps/vps-standby/cert-manager-issuer.yaml

@@ -0,0 +1,22 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: vps-cert-manager-issuer
+  namespace: argocd
+  annotations:
+    argocd.argoproj.io/sync-wave: "1"  # before the per-service Ingress resources (wave 3+) that reference it
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: vps-standby
+  source:
+    repoURL: https://gitlab.kube.huskypup.net/Scooby/Homelabv4.git
+    targetRevision: main
+    path: infrastructure/vps-standby/cert-manager/manifests
+  destination:
+    name: vps-standby
+    namespace: cert-manager
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true

infrastructure/vps-standby/authentik/manifests/ingress.yaml

@@ -0,0 +1,34 @@
+---
+# See infrastructure/vps-standby/vault/manifests/ingress.yaml for the
+# vps.huskypup.net subdomain design rationale.
+#
+# CAVEAT: Authentik's provider/application configs (redirect_uris, etc.)
+# are replicated byte-for-byte from home and point at *.kube.huskypup.net
+# - SSO logins between VPS-hosted apps and this VPS Authentik instance
+# won't complete correctly (redirect mismatch) until that's addressed
+# separately. Direct/local Authentik admin login still works fine for
+# browsing and verifying replicated data.
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vps-authentik
+  namespace: authentik
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - auth.vps.huskypup.net
+      secretName: vps-authentik-tls
+  rules:
+    - host: auth.vps.huskypup.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vps-authentik-server
+                port:
+                  number: 80

infrastructure/vps-standby/authentik/values.yaml

@@ -1,11 +1,11 @@
 # Authentik warm standby on the VPS - Phase 2. The CNPG replica cluster
 # (manifests/cnpg-cluster.yaml) continuously replays WAL from home in the
-# background; the app itself is NOT run in normal operation (replicas: 0)
+# background. The app itself DOES run continuously (replicas: 1, reachable
-# since the replica DB is read-only until a deliberate manual promotion -
+# at auth.vps.huskypup.net - see manifests/ingress.yaml) so the replicated
-# an Authentik pod trying to write against a read-only DB would just
+# data is browsable/verifiable at all times, even though the underlying DB
-# crashloop uselessly. Promotion runbook: flip the CNPG cluster's
+# is a read-only CNPG replica - writes (new logins, session creation) will
-# spec.replica.enabled to false (see cnpg-cluster.yaml), then scale
+# error until a deliberate manual promotion. Promotion runbook: flip the
-# server/worker up from 0.
+# CNPG cluster's spec.replica.enabled to false (see cnpg-cluster.yaml).
 #
 # The `authentik:` block below (secret_key/postgresql "env://" indirection)
 # is copied VERBATIM from infrastructure/authentik/values.yaml on purpose -
@@ -34,7 +34,7 @@ global:
       prefix: AUTHENTIK_POSTGRESQL__
   env:
     - name: AUTHENTIK_URL
-      value: "https://auth.kube.huskypup.net"
+      value: "https://auth.vps.huskypup.net"
     - name: AUTHENTIK_POSTGRESQL__HOST
       valueFrom:
         secretKeyRef:
@@ -59,7 +59,7 @@ global:
       value: "5432"
 
 server:
-  replicas: 0
+  replicas: 1
   containerSecurityContext:
     runAsNonRoot: true
     allowPrivilegeEscalation: false
@@ -78,7 +78,7 @@ server:
     enabled: false
 
 worker:
-  replicas: 0
+  replicas: 1
   containerSecurityContext:
     runAsNonRoot: true
     allowPrivilegeEscalation: false

infrastructure/vps-standby/cert-manager/manifests/cluster-issuer.yaml

@@ -0,0 +1,28 @@
+---
+# cert-manager itself is installed directly by scripts/vps-bootstrap.sh
+# (Phase 0, out-of-band like k3s/Netbird) - not GitOps-managed here. This
+# ClusterIssuer just rides the same GitOps pipeline as everything else in
+# vps-standby, DNS-01 via Cloudflare (same pattern as home's
+# infrastructure/cert-manager/manifests/letsencrypt-issuer.yaml).
+#
+# cloudflare-token-secret is a plain Secret copied here manually
+# (kubectl, not git - same reasoning as every other VPS secret):
+#   kubectl -n cert-manager create secret generic cloudflare-token-secret \
+#     --from-literal=cloudflare-token=<same token as home's cert-manager>
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-production
+spec:
+  acme:
+    server: https://acme-v02.api.letsencrypt.org/directory
+    email: garrettstone499@gmail.com
+    privateKeySecretRef:
+      name: letsencrypt-production
+    solvers:
+      - dns01:
+          cloudflare:
+            email: garrettstone499@gmail.com
+            apiTokenSecretRef:
+              name: cloudflare-token-secret
+              key: cloudflare-token

infrastructure/vps-standby/gitea/manifests/ingress.yaml

@@ -0,0 +1,27 @@
+---
+# See infrastructure/vps-standby/vault/manifests/ingress.yaml for the
+# vps.huskypup.net subdomain design rationale.
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vps-gitea
+  namespace: gitea
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - gitea.vps.huskypup.net
+      secretName: vps-gitea-tls
+  rules:
+    - host: gitea.vps.huskypup.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vps-gitea-http
+                port:
+                  number: 3000

infrastructure/vps-standby/n8n/manifests/ingress.yaml

@@ -0,0 +1,27 @@
+---
+# See infrastructure/vps-standby/vault/manifests/ingress.yaml for the
+# vps.huskypup.net subdomain design rationale.
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vps-n8n
+  namespace: n8n
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - n8n.vps.huskypup.net
+      secretName: vps-n8n-tls
+  rules:
+    - host: n8n.vps.huskypup.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vps-n8n
+                port:
+                  number: 80

infrastructure/vps-standby/n8n/values.yaml

@@ -1,8 +1,11 @@
 # n8n warm standby on the VPS - Phase 2. Same discipline as
 # infrastructure/vps-standby/authentik/values.yaml: the CNPG replica
-# cluster keeps the DB continuously warm in the background, but the app
+# cluster keeps the DB continuously warm in the background, and the app
-# itself stays at replicaCount: 0 until a deliberate manual promotion
+# runs continuously too (replicaCount: 1, reachable at
-# (flip pg-n8n's spec.replica.enabled to false, then scale this up).
+# n8n.vps.huskypup.net - see manifests/ingress.yaml) - workflow
+# saves/executions will error against the read-only DB until a
+# deliberate manual promotion (flip pg-n8n's spec.replica.enabled to
+# false), but the UI and existing workflow definitions are browsable.
 #
 # N8N_ENCRYPTION_KEY must be byte-identical to home's - it decrypts
 # stored credentials (API keys, OAuth tokens, etc.) that live encrypted
@@ -28,7 +31,7 @@ config:
   generic:
     timezone: America/New_York
   path: /
-  host: n8n.kube.huskypup.net
+  host: n8n.vps.huskypup.net
   port: 5678
   protocol: https
   executions:
@@ -41,8 +44,7 @@ config:
 
 secret: {}
 
-# Not run in normal operation - see file header.
+replicaCount: 1
-replicaCount: 0
 
 service:
   type: ClusterIP
@@ -85,8 +87,8 @@ extraEnvSecrets:
     key: encryption-key
 
 extraEnv:
-  WEBHOOK_URL: https://n8n.kube.huskypup.net/
+  WEBHOOK_URL: https://n8n.vps.huskypup.net/
-  N8N_EDITOR_BASE_URL: https://n8n.kube.huskypup.net
+  N8N_EDITOR_BASE_URL: https://n8n.vps.huskypup.net
   N8N_LOG_LEVEL: error
 
 postgresql:

infrastructure/vps-standby/nextcloud/manifests/ingress.yaml

@@ -0,0 +1,27 @@
+---
+# See infrastructure/vps-standby/vault/manifests/ingress.yaml for the
+# vps.huskypup.net subdomain design rationale.
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vps-nextcloud
+  namespace: nextcloud
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - nextcloud.vps.huskypup.net
+      secretName: vps-nextcloud-tls
+  rules:
+    - host: nextcloud.vps.huskypup.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vps-nextcloud
+                port:
+                  number: 8080

infrastructure/vps-standby/nextcloud/values.yaml

@@ -1,19 +1,20 @@
 # Nextcloud warm standby on the VPS - Phase 2. Same discipline as the
 # other vps-standby apps: CNPG replica cluster (manifests/cnpg-cluster.yaml)
 # keeps the DB warm, manifests/pvc-restore-cronjob.yaml keeps file content
-# warm, but the app itself stays at replicaCount: 0 until a deliberate
+# warm, and the app runs continuously too (replicaCount: 1, reachable at
-# manual promotion.
+# nextcloud.vps.huskypup.net - see manifests/ingress.yaml) so replicated
+# files/users are browsable at all times - uploads/changes will error
+# against the read-only DB until a deliberate manual promotion.
 #
 # No Redis here - the home instance uses the redis-operator
 # (infrastructure/vps-standby has no redis-operator deployed, out of
-# scope for a standby that isn't actually serving traffic). Nextcloud
+# scope for a standby that isn't actually serving writable traffic).
-# runs fine without Redis (falls back to DB-based locking, just slower) -
+# Nextcloud runs fine without Redis (falls back to DB-based locking,
-# acceptable for an emergency-promotion scenario; add a real Redis at
+# just slower) - add a real Redis at promotion time if desired.
-# promotion time if desired.
+replicaCount: 1
-replicaCount: 0
 
 nextcloud:
-   host: nextcloud.kube.huskypup.net
+   host: nextcloud.vps.huskypup.net
    username: ""
    password: ""
 
@@ -39,7 +40,7 @@ nextcloud:
             1 => '172.16.0.0/12',
           ),
           'overwriteprotocol' => 'https',
-          'overwrite.cli.url' => 'https://nextcloud.kube.huskypup.net',
+          'overwrite.cli.url' => 'https://nextcloud.vps.huskypup.net',
           'allow_local_remote_servers' => true,
         );
       temp.config.php: |-

infrastructure/vps-standby/vault/manifests/ingress.yaml

@@ -0,0 +1,30 @@
+---
+# Public-ish access to the VPS Vault standby, replacing the old
+# "reachable over Netbird only" model with a stable, permanent hostname
+# (vault.vps.huskypup.net) that doesn't depend on home being up at all -
+# see the vps.huskypup.net subdomain design note in
+# infrastructure/vps-standby/cert-manager/manifests/cluster-issuer.yaml.
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vps-vault
+  namespace: vault
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-production
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - vault.vps.huskypup.net
+      secretName: vps-vault-tls
+  rules:
+    - host: vault.vps.huskypup.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vps-vault-ui
+                port:
+                  number: 8200

scripts/vps-dns-failover/vps-dns-failover.service

@@ -1,10 +0,0 @@
-[Unit]
-Description=VPS dual-site DNS failover check (Homelabv4 vps-standby)
-After=network-online.target
-Wants=network-online.target
-
-[Service]
-Type=oneshot
-ExecStart=/usr/local/bin/vps-dns-failover.sh
-# Deliberately no dependency on k3s/docker being up - this must keep working
-# even if the VPS's own cluster is unhealthy.

scripts/vps-dns-failover/vps-dns-failover.sh

@@ -1,132 +0,0 @@
-#!/usr/bin/env bash
-# vps-dns-failover.sh - Phase 0.5 dual-site DNS failover watcher
-#
-# Runs ON THE VPS as a systemd timer (see vps-dns-failover.timer/.service in this
-# directory) - deliberately plain systemd, not a k8s CronJob, so it works even if
-# the VPS's own k3s is unhealthy. It must never depend on anything inside the home
-# cluster (that's the thing it's watching) or the VPS's own k3s (that's a separate
-# failure domain from this box's basic OS-level networking).
-#
-# Health-checks home.kube.huskypup.net (kept current by an in-cluster CronJob while
-# home is up - see infrastructure/cert-manager/manifests/home-ip-ddns-cronjob.yaml)
-# and flips Cloudflare A records for the standby-service hostnames between home's
-# public IP and this VPS's own public IP, with a consecutive-check threshold so a
-# single blip doesn't cause a flap.
-#
-# State (current active site + streak counters) persists in $STATE_DIR between
-# runs since each systemd timer firing is a fresh process.
-#
-# Install:
-#   sudo mkdir -p /etc/vps-dns-failover
-#   sudo sh -c 'echo "<dns-edit-scoped-cloudflare-token>" > /etc/vps-dns-failover/cloudflare-token'
-#   sudo chmod 600 /etc/vps-dns-failover/cloudflare-token
-#   sudo cp vps-dns-failover.sh /usr/local/bin/vps-dns-failover.sh
-#   sudo chmod +x /usr/local/bin/vps-dns-failover.sh
-#   sudo cp vps-dns-failover.service vps-dns-failover.timer /etc/systemd/system/
-#   sudo systemctl daemon-reload
-#   sudo systemctl enable --now vps-dns-failover.timer
-
-set -euo pipefail
-
-TOKEN_FILE="/etc/vps-dns-failover/cloudflare-token"
-STATE_DIR="/var/lib/vps-dns-failover"
-ZONE_NAME="huskypup.net"  # Cloudflare zone is the parent domain - kube.huskypup.net is just a record within it, not its own zone
-HOME_CHECK_HOST="home.kube.huskypup.net"
-HOME_CHECK_PORT=443
-FAILURE_THRESHOLD=3   # consecutive failed checks before flipping to the VPS
-SUCCESS_THRESHOLD=3   # consecutive successful checks before flipping back to home
-STANDBY_HOSTNAMES=(
-  vault.kube.huskypup.net
-  auth.kube.huskypup.net
-  gitea.kube.huskypup.net
-  n8n.kube.huskypup.net
-  nextcloud.kube.huskypup.net
-)
-
-mkdir -p "$STATE_DIR"
-TOKEN="$(cat "$TOKEN_FILE")"
-STATE_FILE="${STATE_DIR}/state"   # format: "<active-site> <fail-streak> <success-streak>"
-
-if [ -f "$STATE_FILE" ]; then
-  read -r ACTIVE FAIL_STREAK SUCCESS_STREAK < "$STATE_FILE"
-else
-  ACTIVE="home"
-  FAIL_STREAK=0
-  SUCCESS_STREAK=0
-fi
-
-# --- health check ------------------------------------------------------------
-HOME_IP="$(dig +short A "$HOME_CHECK_HOST" @1.1.1.1 | tail -n1)"
-if [ -n "$HOME_IP" ] && timeout 5 bash -c "cat < /dev/null > /dev/tcp/${HOME_IP}/${HOME_CHECK_PORT}" 2>/dev/null; then
-  HEALTHY=1
-else
-  HEALTHY=0
-fi
-
-if [ "$HEALTHY" = 1 ]; then
-  FAIL_STREAK=0
-  SUCCESS_STREAK=$((SUCCESS_STREAK + 1))
-else
-  SUCCESS_STREAK=0
-  FAIL_STREAK=$((FAIL_STREAK + 1))
-fi
-
-echo "$(date -u +%FT%TZ) active=${ACTIVE} healthy=${HEALTHY} fail_streak=${FAIL_STREAK} success_streak=${SUCCESS_STREAK} home_ip=${HOME_IP:-none}"
-
-# --- Cloudflare helpers --------------------------------------------------------
-cf_zone_id() {
-  curl -sf -H "Authorization: Bearer ${TOKEN}" \
-    "https://api.cloudflare.com/client/v4/zones?name=${ZONE_NAME}" | jq -r '.result[0].id'
-}
-
-cf_set_record() {
-  local zone_id="$1" hostname="$2" target_ip="$3"
-  local record_json record_id
-  record_json="$(curl -sf -H "Authorization: Bearer ${TOKEN}" \
-    "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records?name=${hostname}&type=A")"
-  record_id="$(echo "$record_json" | jq -r '.result[0].id // empty')"
-  local body="{\"type\":\"A\",\"name\":\"${hostname}\",\"content\":\"${target_ip}\",\"ttl\":60,\"proxied\":false}"
-  if [ -n "$record_id" ]; then
-    curl -sf -X PATCH -H "Authorization: Bearer ${TOKEN}" -H "Content-Type: application/json" \
-      -d "$body" "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records/${record_id}" >/dev/null
-  else
-    curl -sf -X POST -H "Authorization: Bearer ${TOKEN}" -H "Content-Type: application/json" \
-      -d "$body" "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records" >/dev/null
-  fi
-  echo "  ${hostname} -> ${target_ip}"
-}
-
-flip_to() {
-  local target="$1"
-  local target_ip
-  if [ "$target" = "vps" ]; then
-    target_ip="$(curl -sf https://cloudflare.com/cdn-cgi/trace | grep -o '^ip=.*' | cut -d= -f2)"
-  else
-    target_ip="$HOME_IP"
-  fi
-  if [ -z "$target_ip" ]; then
-    echo "ERROR: could not determine target IP for '${target}', not flipping"
-    return 1
-  fi
-  echo "Flipping standby hostnames to ${target} (${target_ip})..."
-  local zone_id
-  zone_id="$(cf_zone_id)"
-  for h in "${STANDBY_HOSTNAMES[@]}"; do
-    cf_set_record "$zone_id" "$h" "$target_ip"
-  done
-}
-
-# --- decide ------------------------------------------------------------------
-if [ "$ACTIVE" = "home" ] && [ "$FAIL_STREAK" -ge "$FAILURE_THRESHOLD" ]; then
-  flip_to "vps"
-  ACTIVE="vps"
-  FAIL_STREAK=0
-  SUCCESS_STREAK=0
-elif [ "$ACTIVE" = "vps" ] && [ "$SUCCESS_STREAK" -ge "$SUCCESS_THRESHOLD" ]; then
-  flip_to "home"
-  ACTIVE="home"
-  FAIL_STREAK=0
-  SUCCESS_STREAK=0
-fi
-
-echo "${ACTIVE} ${FAIL_STREAK} ${SUCCESS_STREAK}" > "$STATE_FILE"

scripts/vps-dns-failover/vps-dns-failover.timer

@@ -1,10 +0,0 @@
-[Unit]
-Description=Run vps-dns-failover check every 2 minutes
-
-[Timer]
-OnBootSec=1min
-OnUnitActiveSec=2min
-AccuracySec=10s
-
-[Install]
-WantedBy=timers.target