[dnsdist] PowerDNS DNSdist 1.9.0-rc1 released

[Remi Gacogne]

Hello!

We are excited to release the first release candidate of what will 
become PowerDNS DNSdist 1.9.0!

The latest addition to DNSdist is AF_XDP[1] support. AF_XDP is a Linux 
feature optimized for high performance packet processing, allowing 
DNSdist to process UDP datagrams even faster than it already was. To 
give you a concrete example, on an Intel E3-1270 with 4 cores (8 
threads) running at 3.8 Ghz, with a 10 Gbps Intel 82599 network card, 
DNSdist can reply with a static answer at 1 million UDP queries per 
second without AF_XDP, and around 2.5 millions with AF_XDP. Of course 
this comes with some limitations, requires a recent Linux kernel and 
support in the network device driver. Please refer to our documentation 
[2] to know more.

In addition to this new feature, our DNS over QUIC and DNS over HTTP3 
implementations have been significantly improved and several bugs fixed. 
We are particularly thankful to Denis Machard for testing and reporting 
issues with dnstap and protobuf exports, Håkan Lindqvist for tirelessly 
tracking issues in our DNS over HTTP3 feature, Oto Šťáva from the Knot 
Resolver team for testing DNSdist against his DNS over QUIC 
implementation in DNS Shotgun and reporting several discrepancies!

Please see the DNSdist website [3] for the more complete changelog [4] 
and the current documentation. The upgrade guide is also available there 
[5].

Please send us all feedback and issues you might have via the mailing 
list, or in case of a bug, via GitHub [6].

We are immensely grateful to the PowerDNS community for the reporting of 
bugs, issues, feature requests, and especially to the submitters of 
fixes and implementations of features.

The release tarball [7] and its signature [8] are available on the 
downloads website, and packages for several distributions are available 
from our repository [9].

[1]: https://www.kernel.org/doc/html/next/networking/af_xdp.html
[2]: https://dnsdist.org/advanced/xsk.html
[3]: https://dnsdist.org
[4]: https://dnsdist.org/changelog.html#change-1.9.0-rc1
[5]: https://dnsdist.org/upgrade_guide.html#x-to-1-9-0-rc1
[6]: https://github.com/PowerDNS/pdns/issues/new/choose
[7]:
https://downloads.powerdns.com/releases/dnsdist-1.9.0-rc1.tar.bz2
[8]:
https://downloads.powerdns.com/releases/dnsdist-1.9.0-rc1.tar.bz2.sig
[9]: https://repo.powerdns.com

Best regards,
-- 
Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/
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