Hello!, We are proud to announce the first alpha release of what should become PowerDNS Recursor 4.5.0. This release contains various bug fixes, improvements and new features.
The upcoming 4.5.0 release features a re-worked negative cache that
is shared between threads, allowing more efficient use of the cache
and reduced memory consumption.
Support for Extended DNS Errors (RFC 8914[1]) has been added. These
can be enabled by setting the extended-resolution-errors[2] setting
to 'yes', this will send DNSSEC and resolution related errors to
clients. Extended Errors are also hooked up to the Lua scripting
engine[3], allowing fine-grained setting of both the error code and
extra information in the response.
A "refresh almost expired records" (also called "refetch")
mechanism[4] has been introduced to keep the record cache warm. In
short, if a query comes in and the cached record's TTL is almost
expired (within N percent of its original value) the cached record
is served to the client and the record queried for in the
background, ensuring that new queries for that record are fresh and
served from the cache.
Other new features and improvements are:
* The complete protobuffer and dnstap logging code has been rewritten
to have much smaller performance impact.
* We have introduced non-offensive synonyms for words used in
settings. See the upgrade[5] guide.
* The default minimum TTL[6] override has been changed from 0 to 1.
Please refer to the changelog[7] for additional details.
Please send us all feedback and issues you might have via the
mailing list[8], or in case of a bug, via GitHub[9].
The tarball[10] (signature[11]) is available from our download
server[12] and packages for CentOS 7 and 8, Debian Buster and
Ubuntu Bionic and Focal are available from our repository[13].
With the future 4.5.0 final release, the 4.2.x releases will be EOL
and the 4.3.x releases will go into critical security fixes only
mode. Consult the EOL policy[14] for more details.
We would also like to take this opportunity to announce that we
will stop supporting systems using 32-bit time. This includes
32-bit Linux platforms like arm and i386 before kernel version 5.1.
We are grateful to the PowerDNS community for the reporting of
bugs, issues, feature requests, and especially to the submitters of
fixes and features.
-Otto and the PowerDNS Team
References
1. https://tools.ietf.org/html/rfc8914.html
2.
https://docs.powerdns.com/recursor/settings.html#extended-resolution-errors
3.
https://docs.powerdns.com/recursor/lua-scripting/dq.html#DNSQuestion.extendedErrorCode
4. https://docs.powerdns.com/recursor/settings.html#refresh-on-ttl-perc
5. https://docs.powerdns.com/recursor/upgrade.html#x-to-4-5-0-or-master
6. https://docs.powerdns.com/recursor/settings.html#minimum-ttl-override
7. https://doc.powerdns.com/recursor/changelog/4.5.html#change-4.5.0-alpha1
8. https://mailman.powerdns.com/mailman/listinfo/pdns-users
9. https://github.com/PowerDNS/pdns/issues/new/choose
10. https://downloads.powerdns.com/releases/pdns-recursor-4.5.0-alpha1.tar.bz2
11.
https://downloads.powerdns.com/releases/pdns-recursor-4.5.0-alpha1.tar.bz2.sig
12. https://downloads.powerdns.com/releases/
13. https://repo.powerdns.com/
14. https://docs.powerdns.com/recursor/appendices/EOL.html
--
kind regards,
Otto Moerbeek
PowerDNS Developer
Email: otto.moerb...@open-xchange.com
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95366
Managing Board: Andreas Gauger, Carsten Dirks, Dirk Valbert, Frank Hoberg,
Stephan Martin
Chairman of the Board: Richard Seibt
PowerDNS.COM BV, Koninginnegracht 14L, 2514 AA Den Haag, The Netherlands
Managing Director: Robert Brandt, Carsten Dirks
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