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Add dynamic DNS: keep A records pointed at the current public IP

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For deployments on WAN DHCP, operators can declare A records in the DNS section
that the app updates to this box's current public IP every 4 hours (and
immediately on create).

- utils/public_ip.js: getPublicIp() queries external echo services (ipify +
  fallbacks, configurable) with pure isIPv4/extractIp helpers.
- utils/dns_records.js: pure planARecordUpdate() reconciliation decision.
- models/dns_provider.js: Domain.upsertARecord(name, ip) — provider-agnostic
  upsert via getRecords + deleteRecordById + createRecord (createRecord alone is
  not a reliable cross-provider upsert). Apex ('@') handling added to each
  provider (CloudFlare uses the domain name, Porkbun an empty name, DigitalOcean
  '@') via a new DnsApi.apexName().
- models/dynamic_record.js: DynamicRecord model (deterministic id per host,
  apply()/refreshAll()), registered + ModelPs-wrapped for live UI updates.
- services/dynamic_dns.js + conf: 4h scheduler mirroring host_scheduler.
- routes/dns.js: /dynamic CRUD + /dynamic/ip, gated to domain managers/admins.
- views/dns.ejs: "Dynamic A Records (WAN IP)" card with add form + list.
- test/unit/dynamic_record.test.js: public-IP parsing + reconciliation logic.

Verified end-to-end against a live Porkbun domain (create, idempotent, IP-change,
cleanup) plus unit suite (111 pass).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
William Mantly
2026-07-10 23:55:56 -04:00
parent 1f7a9e5ded
commit a2d194f855
17 changed files with 542 additions and 7 deletions
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nodejs/package.json
+3 -3
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@@ -11,10 +11,10 @@
"scripts": {
"start": "node ./bin/www",
"dev": "npx nodemon --ignore public/ ./bin/www",
"test": "node --test test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/unix_socket.test.js test/integration/dns_provider.test.js",
"test:unit": "node --test test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/unix_socket.test.js",
"test": "node --test test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/dynamic_record.test.js test/unit/unix_socket.test.js test/integration/dns_provider.test.js",
"test:unit": "node --test test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/dynamic_record.test.js test/unit/unix_socket.test.js",
"test:integration": "node --test test/integration/dns_provider.test.js",
"test:watch": "node --test --watch test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/unix_socket.test.js test/integration/dns_provider.test.js"
"test:watch": "node --test --watch test/unit/callback_queue.test.js test/unit/host_lookup.test.js test/unit/wildcard_matchany.test.js test/unit/roles.test.js test/unit/oidc.test.js test/unit/safe_redirect.test.js test/unit/host_features.test.js test/unit/dynamic_record.test.js test/unit/unix_socket.test.js test/integration/dns_provider.test.js"
},
"engines": {
"node": ">=18.0.0"