Enable pre-upgrade job for Longhorn in values.yaml, update MetalLB README for clarity on LoadBalancer IP assignment, and enhance Talos configuration with node IP validation for VIPs. Update cluster build documentation to reflect new application versions and configurations.

clusters/noble/apps/newt/README.md

@@ -0,0 +1,79 @@
+# Newt (Pangolin) — noble
+
+This is the **primary** automation path for **public** hostnames to workloads in this cluster (it **replaces** in-cluster ExternalDNS). [Newt](https://github.com/fosrl/newt) is the on-prem agent that connects your cluster to a **Pangolin** site (WireGuard tunnel). The [Fossorial Helm chart](https://github.com/fosrl/helm-charts) deploys one or more instances.
+
+**Secrets:** Never commit endpoint, Newt ID, or Newt secret. If credentials were pasted into chat or CI logs, **rotate them** in Pangolin and recreate the Kubernetes Secret.
+
+## 1. Create the Secret
+
+Keys must match `values.yaml` (`PANGOLIN_ENDPOINT`, `NEWT_ID`, `NEWT_SECRET`):
+
+```bash
+kubectl apply -f clusters/noble/apps/newt/namespace.yaml
+
+kubectl -n newt create secret generic newt-pangolin-auth \
+  --from-literal=PANGOLIN_ENDPOINT='https://pangolin.pcenicni.dev' \
+  --from-literal=NEWT_ID='YOUR_NEWT_ID' \
+  --from-literal=NEWT_SECRET='YOUR_NEWT_SECRET'
+```
+
+Use the Pangolin UI or [Integration API](https://docs.pangolin.net/manage/common-api-routes) (`pick-site-defaults` + `create site`) to obtain a Newt ID and secret for a new site if you are not reusing an existing pair.
+
+## 2. Install the chart
+
+```bash
+helm repo add fossorial https://charts.fossorial.io
+helm repo update
+helm upgrade --install newt fossorial/newt \
+  --namespace newt \
+  --version 1.2.0 \
+  -f clusters/noble/apps/newt/values.yaml \
+  --wait
+```
+
+## 3. DNS: CNAME at your DNS host + Pangolin API for routes
+
+Pangolin does not replace your public DNS provider. Typical flow:
+
+1. **Link a domain** in Pangolin (organization **Domains**). For **CNAME**-style domains, Pangolin shows the hostname you must **CNAME** to at Cloudflare / your registrar (see [Domains](https://docs.pangolin.net/manage/common-api-routes#list-domains)).
+2. **Create public HTTP resources** (and **targets** to your Newt **site**) via the [Integration API](https://docs.pangolin.net/manage/integration-api) — same flows as the UI. Swagger: `https://<your-api-host>/v1/docs` (self-hosted: enable `enable_integration_api` and route `api.example.com` → integration port per [docs](https://docs.pangolin.net/self-host/advanced/integration-api)).
+
+Minimal patterns (Bearer token = org or root API key):
+
+```bash
+export API_BASE='https://api.example.com/v1'   # your Pangolin Integration API base
+export ORG_ID='your-org-id'
+export TOKEN='your-integration-api-key'
+
+# Domains already linked to the org (use domainId when creating a resource)
+curl -sS -H "Authorization: Bearer ${TOKEN}" \
+  "${API_BASE}/org/${ORG_ID}/domains"
+
+# Create an HTTP resource on a domain (FQDN = subdomain + base domain for NS/wildcard domains)
+curl -sS -X PUT -H "Authorization: Bearer ${TOKEN}" -H 'Content-Type: application/json' \
+  "${API_BASE}/org/${ORG_ID}/resource" \
+  -d '{
+    "name": "Example app",
+    "http": true,
+    "domainId": "YOUR_DOMAIN_ID",
+    "protocol": "tcp",
+    "subdomain": "my-app"
+  }'
+
+# Point the resource at your Newt site backend (siteId from list sites / create site; ip:port inside the tunnel)
+curl -sS -X PUT -H "Authorization: Bearer ${TOKEN}" -H 'Content-Type: application/json' \
+  "${API_BASE}/resource/RESOURCE_ID/target" \
+  -d '{
+    "siteId": YOUR_SITE_ID,
+    "ip": "10.x.x.x",
+    "port": 443,
+    "method": "http"
+  }'
+```
+
+Exact JSON fields and IDs differ by domain type (**ns** vs **cname** vs **wildcard**); see [Common API routes](https://docs.pangolin.net/manage/common-api-routes) and Swagger.
+
+## LAN vs internet
+
+- **LAN / VPN:** point **`*.apps.noble.lab.pcenicni.dev`** at the Traefik **LoadBalancer** (**`192.168.50.211`**) with local or split-horizon DNS if you want direct in-lab access.
+- **Internet-facing:** use Pangolin **resources** + **targets** to the Newt **site**; public names rely on **CNAME** records at your DNS provider per Pangolin’s domain setup, not on ExternalDNS in the cluster.