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homelab/ansible/roles/nginx-proxy/README.md
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rblundon 881e2e24a8 Add shared nginx-proxy role; deploy Hermes in Docker; rename Paperclip
nginx-proxy (new role):
- Shared nginx + certbot under /opt/nginx, replacing the copies that
  lived inside the Paperclip compose project
- Apps publish via tasks_from: add_vhost (cert marker -> issue cert ->
  write vhost -> nginx -t -> reload); a vhost that fails nginx -t is
  rolled back
- Certs issued one per domain via Cloudflare DNS challenge; domains
  registered as marker files in cert-domains/; optional LE staging
- Stock nginx.conf plus conf.d (directory mounts, not single-file
  mounts); catch-all server drops unknown Host/SNI
- Containers renamed to nginx and certbot

hermes_docker (new role):
- Official Hermes image, host networking, gateway and dashboard bound
  to loopback and published through nginx-proxy
- Dashboard login via basic-auth provider, secrets from the vault
- Main model set from hermes_model (fantasmic endpoint, key from vault);
  config.yaml overrides are merged from a 0600 staged file that is
  removed afterwards, so the key never appears in a command line
- Data dir owner-only (HERMES_HOME_MODE=0700)

paperclip-docker:
- Remove nginx, certbot and docker-compose download tasks; deploy with
  community.docker.docker_compose_v2 (idempotent, remove_orphans)
- Stop passing the Cloudflare token and certbot email to the Paperclip
  container via env_file
- Bind Postgres to 127.0.0.1 (host networking exposed it on all
  interfaces); stop chowning pgdata, which the postgres image owns
- Handler recreates the paperclip service so .env changes apply
- Domain m-v.wdw-labs.cloud -> cranium-command.wdw-labs.cloud

Playbooks:
- Add day1_deploy_nginx_proxy.yml and day1_deploy_hermes_docker.yml
- deploy_paperclip_stack.yml: run nginx-proxy before paperclip-docker,
  CLI-based container checks (no Docker SDK dependency)
- Remove deploy-hermes.yml

Host vars: add nginx_proxy_certbot_email and nginx_proxy_certbot_staging
(staging stays on until the switch to real certs).
2026-09-30 23:12:40 -05:00

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Markdown

# nginx-proxy
Shared nginx + certbot (Cloudflare DNS challenge) under /opt/nginx. Apps publish
themselves with `tasks_from: add_vhost`; see the header of tasks/add_vhost.yml.
Layout on the host:
/opt/nginx/
docker-compose.yml .env (0600)
conf.d/ 00-global.conf + one <app>.conf per vhost -> /etc/nginx/conf.d
certs/ certbot state (live/, archive/, renewal/) -> /etc/letsencrypt, /etc/nginx/certs
cert-domains/ one empty file per domain (filename = domain)
scripts/ certbot-init.sh
Required variables: `nginx_proxy_certbot_email`, and `vault_cloudflare_api_token`
(or `nginx_proxy_cloudflare_api_token`).
Prerequisite (manual): a DNS record for each app domain pointing at this host.
Staging: set `nginx_proxy_certbot_staging: true` to test the DNS challenge without
using Let's Encrypt rate limits. Staging certs are skipped-as-existing afterwards, so
to move a domain to a real cert: `docker exec certbot certbot delete --cert-name <domain>`
and re-run its play.
Retire a domain: delete its cert-domains/ marker and conf.d/<app>.conf, reload nginx,
then `docker exec certbot certbot delete --cert-name <domain>`.
Pin nginx older than 1.25.1? Set `nginx_proxy_http2: false` (the template uses `http2 on;`).