Unbound 1.23.0
Unbound 1.23.0
This release features changed defaults, fast reload, redis replica, DNS Error Reporting, and bug fixes.
The fast reload is a feature that is listed as experimental. With
unbound-control fast_reload the server can read the new config in
a thread, and when done only briefly pauses the server to update the
settings. This uses double memory, for like zones from disk or config
that is loaded. It only pauses the server, for like less than a second,
so DNS service is not interrupted by the reload of config. A lot of
config items can be changed, but not all. It has options to print
more information, or memory usage, and there is a list of config
options in the man page.
The redis replica support allows for a redis backend to use a redis replica. The read commands are sent to the redis replica host, while the write commands are sent to the redis server. So with several replicas there can be more readers that all write to the redis server.
With DNS error reporting, RFC9567, enabled with
dns-error-reporting: yes, this uses the error reporting agent to send
failure reports to. The number of error reporting queries is output in
the statistics as num.dns_error_reports.
Some defaults are changed in this release. The and zones are added to the default locally served zones, this can be disabled with a nodefault local zone. The default for has changed to 200, after operational feedback. The defaults from RFC8767 are used by on 1800 milliseconds and on 86400 seconds. If Unbound is compiled with edns subnet, the default for module-config is no longer altered, so that compilation with subnet does not interfere when the server does not use subnet. When edns subnet needs to be enabled, should be explicitly set as configuration in the section.