Skynet/misc_nixos-mailserver
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dovecot/fts: switch to fts-flatcurve

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This switches the full-text search plugin from fts-xapian to
fts-flatcurve, the now preferred indexer still powered by Xapian,
which will be integrated into Dovecot core 2.4.

This sets a sane minimal configuration for the plugin with
international language support.

The plugin options marked as "advanced" in Dovecot's documentation
aren't re-exposed for simplicity. They can nevertheless be overridden
by module consumers by directly setting keys with
`services.dovecot2.pluginSettings.fts_*`.

The `fullTextSearch.maintenance` option is removed as the index is now
incrementally optimised in the background.

GitLab: closes https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/issues/239
This commit is contained in:
euxane 2025-01-24 17:36:40 +01:00
parent 433520257a
commit 2ed7a94782
4 changed files with 101 additions and 87 deletions
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18
tests/external.nix
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@ -82,8 +82,6 @@
# special use depends on https://github.com/NixOS/nixpkgs/pull/93201
autoIndexExclude = [ (if (pkgs.lib.versionAtLeast pkgs.lib.version "21") then "\\Junk" else "Junk") ];
enforced = "yes";
# fts-xapian warns when memory is low, which makes the test fail
memoryLimit = 100000;
};
};
};
@ -493,11 +491,9 @@
# should fail because this folder is not indexed
client.fail("search Junk a >&2")
# check that search really goes through the indexer
server.succeed(
"journalctl -u dovecot2 | grep -E 'indexer-worker.* Done indexing .INBOX.' >&2"
)
server.succeed("journalctl -u dovecot2 | grep 'fts-flatcurve(INBOX): Query ' >&2")
# check that Junk is not indexed
server.fail("journalctl -u dovecot2 | grep 'indexer-worker' | grep -i 'JUNK' >&2")
server.fail("journalctl -u dovecot2 | grep 'fts-flatcurve(JUNK): Indexing ' >&2")
with subtest("dmarc reporting"):
server.systemctl("start rspamd-dmarc-reporter.service")
@ -507,14 +503,6 @@
server.fail("journalctl -u postfix | grep -i warning >&2")
server.fail("journalctl -u dovecot2 | grep -v 'imap-login: Debug: SSL error: Connection closed' | grep -i error >&2")
# harmless ? https://dovecot.org/pipermail/dovecot/2020-August/119575.html
server.fail(
"journalctl -u dovecot2 | \
grep -v 'Expunged message reappeared, giving a new UID' | \
grep -v 'FTS Xapian: Box is empty' | \
grep -v 'FTS Xapian: New version of the plugin' | \
grep -vE 'FTS Xapian:.*does not exist. Creating it' | \
grep -vE 'FTS Xapian:.*indexes do not exist. Initializing DB' | \
grep -i warning >&2"
)
server.fail("journalctl -u dovecot2 | grep -v 'Expunged message reappeared, giving a new UID' | grep -i warning >&2")
'';
}