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Viktor wants Forgejo open for anyone to sign up, but without bot/spam
account floods. Flip the deployment from OAuth-only registration
(ALLOW_ONLY_EXTERNAL_REGISTRATION=true) to allowing native local
sign-up, and add two bot gates on the registration form:
- Cloudflare Turnstile captcha (CAPTCHA_TYPE=cfturnstile). The widget
is managed in Terraform (turnstile.tf) via the CF Global API key, so
the sitekey/secret are IaC, not a dashboard artifact.
- Mandatory email confirmation (REGISTER_EMAIL_CONFIRM=true). Wire the
Forgejo mailer to the cluster mailserver as noreply@viktorbarzin.me
(mail.viktorbarzin.me:587 STARTTLS), reusing the same Vault-sourced
credential Authentik uses (email-secret.tf ESO -> secret/authentik
smtp_password).
Existing Authentik OAuth2 login is unchanged (additive). Deployment env
appended (not inserted) so the diff stays purely additive; a reloader
annotation rolls the pod on secret rotation.
Verified live: signup page renders the Turnstile widget, mailer delivers
a test message end-to-end, Forgejo healthy, plan-to-zero after apply.
Runbook: docs/runbooks/forgejo-open-signups.md
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
31 lines
1.4 KiB
HCL
31 lines
1.4 KiB
HCL
# Cloudflare Turnstile widget guarding the open Forgejo signup form
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# (main.tf: FORGEJO__service__ENABLE_CAPTCHA + CAPTCHA_TYPE=cfturnstile).
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# Managed here so the sitekey/secret are IaC rather than a dashboard artifact.
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# The CF Global API Key (cloudflare_provider.tf) has account-wide access, so it
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# can manage Turnstile. The widget secret is sensitive and lands in TF state
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# (Tier-1 PG, encrypted at rest) — same trust level as the API key already in
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# state. Forgejo is non-proxied, but Turnstile is a client-side JS widget served
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# from challenges.cloudflare.com, so proxy status is irrelevant.
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data "cloudflare_accounts" "main" {}
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resource "cloudflare_turnstile_widget" "forgejo_signup" {
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account_id = data.cloudflare_accounts.main.accounts[0].id
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name = "forgejo-signup"
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domains = ["forgejo.viktorbarzin.me"]
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# "managed" = Cloudflare adaptively decides whether to show an interactive
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# challenge; lowest friction for real users, strong against bots.
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mode = "managed"
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}
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# Turnstile secret -> K8s Secret consumed by the Forgejo deployment via
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# secret_key_ref (FORGEJO__service__CF_TURNSTILE_SECRET). The sitekey is public
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# and passed as a plain env value in main.tf.
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resource "kubernetes_secret" "forgejo_turnstile" {
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metadata {
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name = "forgejo-turnstile"
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namespace = kubernetes_namespace.forgejo.metadata[0].name
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}
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data = {
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"cf-turnstile-secret" = cloudflare_turnstile_widget.forgejo_signup.secret
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}
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}
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