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blog: Anubis carve-out for /net-diag.sh

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curl|bash clients can't solve PoW, so /net-diag.sh has to bypass Anubis.
Adds a second ingress_factory pointing /net-diag.sh at the bare blog
service (port 80), keeping every other path on the existing Anubis
chain. Path-prefix specificity wins in Traefik routing — / stays gated.

dns_type = "none" because the apex viktorbarzin.me CF record already
exists from the main ingress.

Doc update: CLAUDE.md Anubis section notes blog now follows the
wrongmove carve-out pattern.
This commit is contained in:
Viktor Barzin 2026-05-28 13:22:57 +00:00
parent fc5a4b66ad
commit 8b4bcc0ca2
2 changed files with 20 additions and 2 deletions
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2
.claude/CLAUDE.md
View file

@ -36,7 +36,7 @@ Violations cause state drift, which causes future applies to break or silently r
- **Anti-exposure rule** (the reason `"app"` exists): only pick `"app"` or `"none"` AFTER you've verified the app has its own user auth (`"app"`) OR the endpoint is intentionally public (`"none"`). Default is `"required"` so accidental omission fails closed. **Convention**: when using `"app"` or `"none"`, add a comment line above the `auth = "..."` line stating what gates the app or why it's public. **Enforced by `scripts/tg`**: every `tg plan/apply/destroy/refresh` runs `scripts/check-ingress-auth-comments.py` against the current stack and aborts if any `auth = "app|none"` line lacks the preceding `# auth = "<tier>": ...` comment. Stack-scoped — untouched stacks aren't blocked until they're next edited.
- **Anti-AI**: on by default when `auth = "none"` or `auth = "app"` (no Authentik to discourage bots); redundant on `"required"` and `"public"`.
- **DNS**: `dns_type = "proxied"` (Cloudflare CDN) or `"non-proxied"` (direct A/AAAA). DNS records are auto-created — no need to edit `config.tfvars`. Smoke-test target: `echo.viktorbarzin.me` (auth=public, header-reflecting backend).
- **Anubis PoW challenge** (`modules/kubernetes/anubis_instance/`): per-site reverse proxy that issues a 30-day JWT cookie after a tiny PoW solve. Use for **public, content-bearing sites without app-level auth** (blog, docs, wikis, static landing pages). Pattern: declare `module "anubis" { source = "../../modules/kubernetes/anubis_instance"; name = "X"; namespace = ...; target_url = "http://<backend>.<ns>.svc.cluster.local" }`, then in `ingress_factory` set `service_name = module.anubis.service_name`, `port = module.anubis.service_port`, `anti_ai_scraping = false`. Shared ed25519 key in Vault `secret/viktor` -> `anubis_ed25519_key`; cookie scoped to `viktorbarzin.me` so one solve covers all Anubis-fronted subdomains. **DO NOT put Anubis in front of Git/API/WebDAV/CLI endpoints** — clients without JS can't solve PoW. **Replicas default to 1** because Anubis stores in-flight challenges in process memory; a challenge issued by pod A and solved against pod B errors with `store: key not found` (HTTP 500). Bumping replicas requires wiring a shared Redis store (TODO). For path-level carve-outs (e.g. wrongmove has `/` behind Anubis but `/api` direct), declare a second `ingress_factory` with `ingress_path = ["/api"]` pointing at the bare backend service. Active on: blog, www, kms, travel, f1, cc, json, pb (privatebin), home (homepage), wrongmove (UI only). See `.claude/reference/patterns.md` "Anti-AI Scraping" for full layering.
- **Anubis PoW challenge** (`modules/kubernetes/anubis_instance/`): per-site reverse proxy that issues a 30-day JWT cookie after a tiny PoW solve. Use for **public, content-bearing sites without app-level auth** (blog, docs, wikis, static landing pages). Pattern: declare `module "anubis" { source = "../../modules/kubernetes/anubis_instance"; name = "X"; namespace = ...; target_url = "http://<backend>.<ns>.svc.cluster.local" }`, then in `ingress_factory` set `service_name = module.anubis.service_name`, `port = module.anubis.service_port`, `anti_ai_scraping = false`. Shared ed25519 key in Vault `secret/viktor` -> `anubis_ed25519_key`; cookie scoped to `viktorbarzin.me` so one solve covers all Anubis-fronted subdomains. **DO NOT put Anubis in front of Git/API/WebDAV/CLI endpoints** — clients without JS can't solve PoW. **Replicas default to 1** because Anubis stores in-flight challenges in process memory; a challenge issued by pod A and solved against pod B errors with `store: key not found` (HTTP 500). Bumping replicas requires wiring a shared Redis store (TODO). For path-level carve-outs (e.g. wrongmove has `/` behind Anubis but `/api` direct, blog has `/net-diag.sh` direct), declare a second `ingress_factory` with `ingress_path = ["/<path>"]` pointing at the bare backend service. Active on: blog (except `/net-diag.sh`), www, kms, travel, f1, cc, json, pb (privatebin), home (homepage), wrongmove (UI only). See `.claude/reference/patterns.md` "Anti-AI Scraping" for full layering.
- **Docker images**: Always build for `linux/amd64`. SHA-tag rule is being phased out — see `docs/plans/2026-05-16-auto-upgrade-apps-{design,plan}.md`. New model: CI pushes `:latest` (optionally also `:<8-char-sha>` for traceability), Keel polls and triggers rollouts. Cache-staleness concern from the old rule is resolved at the nginx layer (URL-split — manifests pass through, blobs cached). Until Phase 1 of the migration completes (per the plan), follow the SHA-tag rule for new services to match existing pattern.
- **Private registry**: `forgejo.viktorbarzin.me/viktor/<name>` (Forgejo packages, OAuth-style PAT auth). Use `image: forgejo.viktorbarzin.me/viktor/<name>:<tag>` + `imagePullSecrets: [{name: registry-credentials}]`. Kyverno auto-syncs the Secret to all namespaces. Containerd `hosts.toml` on every node redirects to in-cluster Traefik LB `10.0.20.200` to avoid hairpin NAT. Push-side: viktor PAT in Vault `secret/ci/global/forgejo_push_token` (Forgejo container packages are scoped per-user; only the package owner can push, ci-pusher cannot write to viktor/*). Pull-side: cluster-puller PAT in Vault `secret/viktor/forgejo_pull_token`. Retention CronJob (`forgejo-cleanup` in `forgejo` ns, daily 04:00) keeps newest 10 versions + always `:latest`; integrity probed every 15min by `forgejo-integrity-probe` in `monitoring` ns (catalog walk + manifest HEAD on every blob). See `docs/plans/2026-05-07-forgejo-registry-consolidation-{design,plan}.md` for the migration history. Pull-through caches for upstream registries (DockerHub, GHCR, Quay, k8s.gcr, Kyverno) stay on the registry VM at `10.0.20.10` ports 5000/5010/5020/5030/5040 — the old port-5050 R/W private registry was decommissioned 2026-05-07.
- **LinuxServer.io containers**: `DOCKER_MODS` runs apt-get on every start — bake slow mods into a custom image (`RUN /docker-mods || true` then `ENV DOCKER_MODS=`). Set `NO_CHOWN=true` to skip recursive chown that hangs on NFS mounts.

20
stacks/blog/main.tf
View file

@ -9,7 +9,7 @@ resource "kubernetes_namespace" "website" {
name = "website"
labels = {
"istio-injection" : "disabled"
tier = local.tiers.aux
tier = local.tiers.aux
"keel.sh/enrolled" = "true"
}
}
@ -150,6 +150,24 @@ module "ingress" {
}
}
# Carve-out for /net-diag.sh — a curl|bash diagnostic script for macOS.
# Anubis can't gate this path because non-JS clients (curl) can't solve PoW.
# Points at the bare blog nginx service, bypassing the Anubis proxy.
module "ingress_net_diag" {
source = "../../modules/kubernetes/ingress_factory"
# auth = "none": public read-only static file (curl|bash diagnostic script). No login, no PoW.
auth = "none"
namespace = kubernetes_namespace.website.metadata[0].name
name = "blog-net-diag"
service_name = kubernetes_service.blog.metadata[0].name
port = "80"
ingress_path = ["/net-diag.sh"]
full_host = "viktorbarzin.me"
dns_type = "none" # DNS already owned by the main blog ingress.
tls_secret_name = var.tls_secret_name
anti_ai_scraping = false # Single static file; nothing for scrapers to mine.
}
# CI retrigger 2026-05-16T13:42:57+00:00 — bulk enrollment apply (pipeline #689 killed)
# CI retrigger v2 2026-05-16T13:46:35+00:00