mix
ae42450ec1
Full server backup (spec 7.5.A): internal/backup produces a tar.gz of all of /data — a consistent SQLite snapshot via VACUUM INTO, DKIM keys, sasldb2 and a version manifest; TLS certs (tls/) and the Postfix queue are excluded. Two equal paths: the panel button (POST /backup, no-store) and the selfpost-backup CLI via docker exec (spec 11.6). CheckRestore runs before store.Open: a manifest version mismatch refuses to boot with the image tag to use; a match consumes the manifest so it only guards the first post-restore boot. Restore is not a separate branch — Postfix/OpenDKIM regenerate from the restored SQLite as on any start. Domain export/import (spec 7.5.B): DomainExport carries the DKIM private key and each application's working password. SASL secrets are read from sasldb2 via db_dump (the userPassword property is plaintext) and, on import, re-keyed under the local realm with saslpasswd2 — so credentials keep working on an instance with a different hostname, with no DKIM DNS change. Import validates and rolls back atomically on any failure. db-util (db_dump) is now an explicit image dep. Verified on the server (selfpost:p9): gofmt/vet/test green; container e2e for cross-realm domain export/import (SMTP AUTH 235 under the new realm), CLI and panel backups, same-version restore, and version-mismatch refusal. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
97 lines
3.8 KiB
Docker
97 lines
3.8 KiB
Docker
# syntax=docker/dockerfile:1
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#
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# SelfPost — single Debian-slim image running postfix + opendkim + panel under
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# supervisord (spec 4). Build from the repository root:
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#
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# docker build -f build/Dockerfile -t selfpost:dev --build-arg VERSION=dev .
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# ---- build stage -------------------------------------------------------------
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FROM golang:1.26-bookworm AS build
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WORKDIR /src
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# Version stamped into both binaries; MUST match the image tag (spec 7.5.A).
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ARG VERSION=dev
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# Module metadata first for layer caching. go.sum arrived in Phase 2 with the
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# SQLite driver and bcrypt.
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COPY go.mod go.sum ./
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RUN go mod download
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COPY cmd ./cmd
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COPY internal ./internal
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ENV CGO_ENABLED=0
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RUN go vet ./... \
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&& go build -trimpath \
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-ldflags "-X codeberg.org/mix/selfpost/internal/buildinfo.Version=${VERSION}" \
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-o /out/panel ./cmd/panel \
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&& go build -trimpath \
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-ldflags "-X codeberg.org/mix/selfpost/internal/buildinfo.Version=${VERSION}" \
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-o /out/selfpost-backup ./cmd/selfpost-backup
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# ---- runtime stage -----------------------------------------------------------
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FROM debian:bookworm-slim AS runtime
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ENV DEBIAN_FRONTEND=noninteractive
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# Preseed Postfix so its install is non-interactive and yields a working
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# main.cf. The real relay configuration is generated by the panel in Phase 5.
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RUN echo "postfix postfix/mailname string localhost" | debconf-set-selections \
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&& echo "postfix postfix/main_mailer_type string Internet Site" | debconf-set-selections \
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&& apt-get update \
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&& apt-get install -y --no-install-recommends \
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postfix \
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opendkim \
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opendkim-tools \
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sasl2-bin \
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libsasl2-modules \
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db-util \
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supervisor \
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logrotate \
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ca-certificates \
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&& rm -rf /var/lib/apt/lists/*
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# Unprivileged user for the panel process (spec 7.6.8).
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RUN useradd --system --no-create-home --shell /usr/sbin/nologin panel
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# Shared group bridging the unprivileged services (spec 5.1, 6): the panel
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# generates per-domain DKIM keys, application SASL accounts (sasldb2) and the
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# Postfix sender map, while OpenDKIM and Postfix (different users) must read
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# them. Membership in this group — plus setgid dirs under /data (set up in
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# entrypoint.sh) — lets OpenDKIM read the panel-owned keys and lets Postfix read
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# the sasldb2/sender map, and lets the panel reach the supervisor control socket
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# to signal OpenDKIM/Postfix reloads without any process running as root.
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RUN groupadd --system selfpost \
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&& usermod -aG selfpost panel \
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&& usermod -aG selfpost opendkim \
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&& usermod -aG selfpost postfix
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# Runtime directories: milter sockets and the consolidated persistent root.
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RUN mkdir -p /run/opendkim /run/selfpost /data \
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&& chown opendkim:opendkim /run/opendkim \
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&& chown panel:panel /run/selfpost /data
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COPY --from=build /out/panel /usr/local/bin/panel
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COPY --from=build /out/selfpost-backup /usr/local/bin/selfpost-backup
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COPY build/opendkim.conf /etc/opendkim.conf
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COPY build/postfix-wrapper.sh /usr/local/bin/postfix-wrapper.sh
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COPY build/postfix-config.sh /usr/local/bin/postfix-config.sh
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COPY build/postfix-cert-reload.sh /usr/local/bin/postfix-cert-reload.sh
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COPY build/crashexit.py /usr/local/bin/crashexit.py
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COPY build/entrypoint.sh /usr/local/bin/entrypoint.sh
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COPY build/supervisord.conf /etc/supervisor/supervisord.conf
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RUN chmod +x /usr/local/bin/postfix-wrapper.sh /usr/local/bin/postfix-config.sh \
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/usr/local/bin/postfix-cert-reload.sh /usr/local/bin/crashexit.py \
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/usr/local/bin/entrypoint.sh
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# Published submission ports: 465 (smtps, primary) and 587 (submission, optional)
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# plus the panel on 8080. Outbound delivery dials remote MXs on 25 as a client,
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# which needs no inbound listener or EXPOSE.
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EXPOSE 8080 465 587
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# The entrypoint fixes /data ownership (bind mount) as root, then execs
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# supervisord, which becomes PID 1 and owns process supervision (spec 4).
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ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
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