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backup: the panel's archive is the command's, private key included

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Owner, 2026-10-11: the private key is needed, and a backup from the
panel and one from the console have to be the same.

The commit that made the panel's backup work skipped a file under
certs/ the panel could not open - on the test server the private key,
which the certificate hook leaves to root and Postfix's group. That gave
an archive with a certificate and no key, and two kinds of archive.

- Params.Unprivileged is gone. Nothing is left out on account of who
  makes the archive; the queue is out for everyone (previous commit).
- When the panel cannot read a file under certs/, backup.Check says so
  before the download and the panel refuses with what to do on the host:
  chgrp 998 certs/privkey.pem && chmod 640. backup.UnreadableCert tells
  that case from any other failure.
- 998 is the container's selfpost group, which holds the panel and
  Postfix. Its id was whatever groupadd gave; the Dockerfile now fixes
  it at the value it has always had, because an operator addresses it
  by number from the host.
- Guide: method 1 is the same archive as method 2, with the permission
  the key needs and a note for whatever renews the certificate. Help and
  the box follow the design commit before this one.
- e2e: the restore scenario first makes the key unreadable and expects
  the refusal naming the file and the way out, then takes the backup and
  expects the key in it; nothing is put back by hand before the restart.

  go vet ./internal/backup/ ./internal/web/handlers/: ok
  go test ./internal/backup/ ./cmd/... ./internal/web/...: ok
  make e2e on the test server: ok

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
mix
2026-10-11 20:43:10 +03:00
co-authored by Claude Opus 5.5
parent 75ebbf6a57
commit dd0fefdcb7
10 changed files with 138 additions and 93 deletions
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internal/web/view/templates/backup.html
+1 -1
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@@ -13,7 +13,7 @@
<div class="column is-6">
{{template "box_open" .Full}}
{{template "body_open"}}
<p class="mb-3"><code>data/</code> (database, DKIM keys, credentials), <code>docker-compose.yml</code>, <code>.env</code> and <code>certs/</code> in one archive. The Postfix queue is left out: it cannot be copied reliably while the server is running. So is a certificate file the panel may not read. Restore into an empty project directory and start the <strong>same SelfPost version</strong>. The reverse-proxy vhost is not included.</p>
<p class="mb-3"><code>data/</code> (database, DKIM keys, credentials), <code>docker-compose.yml</code>, <code>.env</code> and <code>certs/</code> in one archive. The Postfix queue is left out: it cannot be copied reliably while the server is running. Restore into an empty project directory and start the <strong>same SelfPost version</strong>. The reverse-proxy vhost is not included.</p>
<form class="sp-form" method="post" action="{{.FullAction}}">
<div class="field"><label class="checkbox"><input type="checkbox" name="encrypt" value="1"{{if .Encrypt}} checked{{end}} data-encrypt-toggle> Encrypt with a password (<code>.spbk</code>)</label></div>
<div data-encrypt-fields>