CoreDNS Files

This release adds initial support for DoH3 and includes several core performance and stability fixes, including reduced allocations, a resolved data race in uniq, and safer QUIC listener initialization. Plugin updates improve forwarder reliability, extend GeoIP schema support, and fix issues in secondary, nomad, and kubernetes. Cache and file plugins also receive targeted performance tuning.

Deprecations: The GeoIP plugin currently returns 0 for missing latitude/longitude, even though 0,0 is a real location. In the next release, this behavior will change: missing coordinates will return an empty string instead. This avoids conflating “missing” with a real coordinate. Users relying on 0 as a sentinel value should update their logic before this change takes effect. See PR [#7732] for reference.

Brought to You By

Alicia Y Andrey Smirnov Brennan Kinney Charlie Vieth Endre Szabo Eric Case Filippo125 Nico Berlee Olli Janatuinen Rick Fletcher Timur Solodovnikov Tomas Boros Ville Vesilehto cangming rpb-ant wencyu wenxuan70 Yong Tang zhetaicheleba

Noteworthy Changes

• core: Add basic support for DoH3 (https://github.com/coredns/coredns/pull/7677)
• core: Avoid proxy unnecessary alloc in Yield (https://github.com/coredns/coredns/pull/7708)
• core: Fix usage of sync.Pool to save an alloc (https://github.com/coredns/coredns/pull/7701)
• core: Fix data race with sync.RWMutex for uniq (https://github.com/coredns/coredns/pull/7707)
• core: Prevent QUIC reload panic by lazily initializing the listener (https://github.com/coredns/coredns/pull/7680)
• core: Refactor/use reflect.TypeFor (https://github.com/coredns/coredns/pull/7696)
• plugin/auto: Limit regex length (https://github.com/coredns/coredns/pull/7737)
• plugin/cache: Remove superfluous allocations in item.toMsg (https://github.com/coredns/coredns/pull/7700)
• plugin/cache: Isolate metadata in prefetch goroutine (https://github.com/coredns/coredns/pull/7631)
• plugin/cache: Correct spelling of MaximumDefaultTTL in cache and dnsutil packages (https://github.com/coredns/coredns/pull/7678)
• plugin/dnstap: Better error handling (redial & logging) when Dnstap is busy (https://github.com/coredns/coredns/pull/7619)
• plugin/file: Performance finetuning (https://github.com/coredns/coredns/pull/7658)
• plugin/forward: Disallow NOERROR in failover (https://github.com/coredns/coredns/pull/7622)
• plugin/forward: Added support for per-nameserver TLS SNI (https://github.com/coredns/coredns/pull/7633)
• plugin/forward: Prevent busy loop on connection err (https://github.com/coredns/coredns/pull/7704)
• plugin/forward: Add max connect attempts knob (https://github.com/coredns/coredns/pull/7722)
• plugin/geoip: Add ASN schema support (https://github.com/coredns/coredns/pull/7730)
• plugin/geoip: Add support for subdivisions (https://github.com/coredns/coredns/pull/7728)
• plugin/kubernetes: Fix kubernetes plugin logging (https://github.com/coredns/coredns/pull/7727)
• plugin/multisocket: Cap num sockets to prevent OOM (https://github.com/coredns/coredns/pull/7615)
• plugin/nomad: Support service filtering (https://github.com/coredns/coredns/pull/7724)
• plugin/rewrite: Pre-compile CNAME rewrite regexp (https://github.com/coredns/coredns/pull/7697)
• plugin/secondary: Fix reload causing secondary plugin goroutine to leak (https://github.com/coredns/coredns/pull/7694)