mixandClaude Opus 5.5
68493dc097
Security audit 2026-10-17, findings I4 and I5 (low), stage 5. I4: every action is pinned by commit with its version in a comment - the latest release of the major each used, so nothing changes in behaviour (checkout v4.4.0, setup-go v5.6.0, setup-buildx-action v3.12.0, build-push-action v6.19.2, login-action v3.7.0; commits read with git ls-remote, the tags are lightweight). govulncheck v1.9.0 runs on the source in test.yml, and in release.yml on the image's panel and selfpost-backup binaries before the push (-mode=binary: the base image's Go, which may lag the runner's - a fixed stdlib advisory then fails the release until golang:1.26-trixie moves, which is the point). certbot is pinned to v5.8.0 and Caddy to 2.11.7 (Docker Hub, 2026-10-17). provenance/SBOM stay off until the GHCR cleanup keeps attestations, as the plan says. I5: published tags are never rebuilt, so a Debian security fix reaches operators with the next release. The guide (§ Upgrading) and SECURITY.md say so; base-packages.yml runs .github/scripts/base-packages.sh every Monday: what debian:trixie-slim would install for postfix, libsasl2-2, libsasl2-modules-db, sasl2-bin, openssl, libssl3t64, libdb5.3t64 against the table in development.md (the 2.14.3 image's versions), red when one moved. Tried on the test server: green as it stands, red with a version changed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
65 lines
2.8 KiB
YAML
65 lines
2.8 KiB
YAML
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# Alternative reverse-proxy: Caddy — the simplest option, fully automatic ACME
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# with no separate certbot container. Caddy writes certificates as plain PEM
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# under its own data directory, which this fragment bind-mounts to the host so
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# SelfPost can read the same files.
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#
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# NOTE: Caddy's on-disk cert path includes
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# the ACME CA's name as a path segment, e.g.
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# <data>/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>/<hostname>.crt
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# This has been stable across recent Caddy releases but is an internal
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# storage detail, not a documented public API — VERIFY the exact path against
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# the Caddy version you deploy (`docker compose exec caddy find /data/caddy/certificates -name '*.crt'`)
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# before wiring it into the volume mount below.
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# Read in the source (caddyserver/certmagic, storage.go, KeyBuilder.SiteCert():
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# certificates/<issuer key>/<domain>/<domain>.crt; acmeissuer.go, issuerKey():
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# the CA URL's host and path, "acme-v02.api.letsencrypt.org-directory" for Let's
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# Encrypt). caddy/modules/caddytls/automation.go, DefaultIssuers(): ZeroSSL is a
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# second issuer only when an email is configured, and the Caddyfile below sets
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# none. Read at the projects' master of 2026-10-14, when the image was the
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# moving `caddy:2`; it is pinned below now, and a bump re-reads these.
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#
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# Merge with the base file — run this from the deploy/ directory (Compose
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# resolves every relative path in both files against the directory of the
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# FIRST -f file, i.e. deploy/, which is why paths below are ./caddy/... -
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# docs.docker.com/compose/how-tos/multiple-compose-files/merge/: "Paths are
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# evaluated relative to the base file"):
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#
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# docker compose -f docker-compose.yml -f caddy/docker-compose.caddy.yml up -d
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services:
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selfpost:
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ports: !override
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- "465:465"
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- "587:587"
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- "25:25"
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environment:
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# Caddy names certificate files after the hostname, not
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# fullchain.pem/privkey.pem like certbot — override the base file's
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# paths to match.
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TLS_CERT_FILE: /etc/postfix/tls/<hostname>.crt
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TLS_KEY_FILE: /etc/postfix/tls/<hostname>.key
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volumes: !override
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- ./data:/data
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- .:/selfpost-deploy:ro
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# Replace <hostname> with your actual mail/panel hostname, matching
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# the Caddyfile below and SELFPOST_HOSTNAME.
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- ./caddy/caddy-data/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>:/etc/postfix/tls:ro
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caddy:
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# Pinned to a release: "2" moves under a running server (security audit
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# 2026-10-17, I4). Bump it deliberately.
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image: caddy:2.11.7
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restart: unless-stopped
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# A ceiling on processes and threads (security audit 2026-10-17, I3).
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pids_limit: 256
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depends_on:
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- selfpost
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ports:
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- "80:80"
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- "443:443"
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volumes:
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- ./caddy/Caddyfile:/etc/caddy/Caddyfile:ro
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- ./caddy/caddy-data:/data
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- ./caddy/caddy-config:/config
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