Files
selfpost/deploy/caddy/docker-compose.caddy.yml
mix 61f525e2d7 Phase 10: deployment (Apache compose + proxy fragments, CI release) + docs
- deploy/docker-compose.yml: pinned-tag ghcr image, hardened (cap_drop ALL +
  minimal cap_add, no-new-privileges, panel bound to 127.0.0.1 only). Apache
  itself runs on the host (spec 10.5), fragment at deploy/apache/.
- Alternative reverse-proxy fragments: nginx (+certbot sidecar), Caddy
  (automatic ACME), Traefik (+acme.json PEM extraction script).
- .github/workflows/release.yml: tag-triggered ghcr.io publish, version piped
  from the git tag into both the binary ldflags and the image tag (spec 10.1).
- Closed a gap from Phase 1: logrotate was installed but never invoked;
  wired up build/logrotate-mail.conf + logrotate-loop.sh + a supervisor
  program (copytruncate, since postlogd holds mail.log open with nothing to
  signal on rotation).
- README rewritten: site requirements checklist, reverse-proxy comparison,
  DNS setup (server- vs domain-level), IP warmup, backup/restore vs domain
  export/import, fixed-tag rationale, machine requirements.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-15 21:23:19 +03:00

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# Alternative reverse-proxy: Caddy (spec 10.3) — the simplest option, fully
# automatic ACME with no separate certbot container. Caddy writes certificates
# as plain PEM under its own data directory, which this fragment bind-mounts
# to the host so SelfPost can read the same files.
#
# NOTE (spec 10.3 explicitly flags this): Caddy's on-disk cert path includes
# the ACME CA's name as a path segment, e.g.
# <data>/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>/<hostname>.crt
# This has been stable across recent Caddy releases but is an internal
# storage detail, not a documented public API — VERIFY the exact path against
# the Caddy version you deploy (`docker compose exec caddy find /data/caddy/certificates -name '*.crt'`)
# before wiring it into the volume mount below.
#
# Merge with the base file — run this from the deploy/ directory (Compose
# resolves every relative path in both files against the directory of the
# FIRST -f file, i.e. deploy/, which is why paths below are ./caddy/...):
#
# docker compose -f docker-compose.yml -f caddy/docker-compose.caddy.yml up -d
services:
selfpost:
ports: !override
- "465:465"
- "587:587"
environment:
# Caddy names certificate files after the hostname, not
# fullchain.pem/privkey.pem like certbot — override the base file's
# paths to match.
TLS_CERT_FILE: /etc/postfix/tls/<hostname>.crt
TLS_KEY_FILE: /etc/postfix/tls/<hostname>.key
volumes: !override
- ./data:/data
# Replace <hostname> with your actual mail/panel hostname, matching
# the Caddyfile below and SELFPOST_HOSTNAME.
- ./caddy/caddy-data/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>:/etc/postfix/tls:ro
caddy:
image: caddy:2
restart: unless-stopped
depends_on:
- selfpost
ports:
- "80:80"
- "443:443"
volumes:
- ./caddy/Caddyfile:/etc/caddy/Caddyfile:ro
- ./caddy/caddy-data:/data
- ./caddy/caddy-config:/config