Ubuntu Manpage: knotc - Knot DNS control utility

NAME

       knotc - Knot DNS control utility

SYNOPSIS

       knotc [config_option] [options] [action]

DESCRIPTION

This program controls a running knotd process using a socket.

If an action is specified, it is performed and knotc exits, otherwise the program is
executed in the interactive mode.

Config options
-c, --config file
Use a textual configuration file (default is /etc/knot/knot.conf).

-C, --confdb directory
Use a binary configuration database directory (default is /var/lib/knot/confdb).
The default configuration database, if exists, has a preference to the default
configuration file.

Options
-m, --max-conf-size MiB
Set maximum size of the configuration database (default is 500 MiB, maximum 10000
MiB).

-s, --socket path
Use a control UNIX socket path (default is /run/knot/knot.sock).

-t, --timeout seconds
Use a control timeout in seconds. Set to 0 for infinity (default is 60). The
control socket operations are also subject to the timeout parameter set on the
server side in server's Control configuration section.

-b, --blocking
Zone event trigger commands wait until the event is finished. Control timeout is
set to infinity if not forced by explicit timeout specification.

-e, --extended
Show extended output (even empty items in zone status).

-f, --force
Forced operation. Overrides some checks.

-x, --mono
Don't generate colorized output.

-X, --color
Force colorized output in extended output or to a pipe.

-v, --verbose
Enable debug output.

-h, --help
Print the program help.

-V, --version
Print the program version.

Actions
status [detail]
Check if the server is running. Details are version for the running server version,
workers for the numbers of worker threads, configure for the configure summary, or
cert-key for the public key pin of the currently used certificate.

stop Stop the server if running.

reload Reload the server configuration and modified zone files. All open zone transactions
will be aborted!

stats [module[.counter]]
Show global statistics counter(s). To print also counters with value 0, use force
option.

zone-check [zone...]
Test if the server can load the zone. Semantic checks are executed if enabled in
the configuration. If invoked with the force option, an error is returned when
semantic check warning appears. (*)

zone-status [zone...] [filter]
Show the zone status. Filters are +role, +serial, +transaction, +events, +freeze,
and +catalog. Empty zone parameters are omitted, unless the --extended option is
used. A single dash in the output represents an unset value. Automatic colorization
can be overruled using the --mono and --color options.

The color code is: green - zone acts as a master / red - zone acts as a slave, bold
font (highlited) - zone is active / normal - zone is empty, underscored - zone is
an interpreted catalog member.

zone-reload [zone...]
Trigger a zone reload from a disk without checking its modification time. For
secondary zone, the refresh event from primary server(s) is scheduled; for primary
zone, the notify event to secondary server(s) is scheduled. An open zone
transaction will be aborted! If invoked with the force option, also zone modules
will be re-loaded, but blocking mode might not work reliably. (#)

zone-refresh [zone...]
Trigger a check for the zone serial on the zone's primary server. If the primary
server has a newer zone, a transfer is scheduled. This command is valid for
secondary zones. (#)

zone-retransfer [zone...]
Trigger a zone transfer from the zone's primary server. The server doesn't check
the serial of the primary server's zone. This command is valid for secondary zones.
(#)

zone-notify [zone...]
Trigger a NOTIFY message to all configured remotes. This can help in cases when
previous NOTIFY had been lost or the secondary servers have been offline. (#)

zone-flush [zone...] [+outdir directory]
Trigger a zone journal flush to the configured zone file. If an output directory is
specified, the current zone is immediately dumped (in the blocking mode) to a zone
file in the specified directory. See Notes below about the directory permissions.
(#)

zone-backup [zone...] +backupdir directory [filter...]
Trigger a zone data and metadata backup to a specified directory. Available
filters are +zonefile, +journal, +timers, +kaspdb, +keysonly, +catalog, +quic, and
their negative counterparts +nozonefile, +nojournal, +notimers, +nokaspdb,
+nokeysonly, +nocatalog, and +noquic. With these filters set, zone contents, zone's
journal, zone-related timers, zone-related data in the KASP database together with
keys (or keys without the KASP database), zone's catalog, and the server QUIC key
and certificate, respectively, are backed up, or omitted from the backup. By
default, filters +zonefile, +timers, +kaspdb, +nokeysonly, +catalog, +quic, and
+nojournal are set for backup. The same defaults are set for restore, with the only
difference being +noquic. Setting a filter for an item doesn't change default
settings for other items. If zone flushing is disabled, the original zone file is
backed up instead of writing out zone contents to a file. When backing-up a
catalog zone, it is recommended to prevent ongoing changes to it by use of
zone-freeze. See Notes below about the directory permissions. (#)

zone-restore [zone...] +backupdir directory [filter...]
Trigger a zone data and metadata restore from a specified backup directory.
Optional filters are equivalent to the same filters of zone-backup. Restore from
backups created by Knot DNS releases prior to 3.1 is possible with the force
option. See Notes below about the directory permissions. (#)

zone-sign [zone...]
Trigger a DNSSEC re-sign of the zone. Existing signatures will be dropped. This
command is valid for zones with DNSSEC signing enabled. (#)

zone-keys-load [zone...]
Trigger a load of DNSSEC keys and other signing material from KASP database (which
might have been altered manually). If suitable, re-sign the zone afterwards
(keeping valid signatures intact). (#)

zone-key-rollover zone key_type
Trigger immediate key rollover. Publish new key and start a key rollover, even when
the key has a lifetime to go. Key type can be ksk (also for CSK) or zsk. This
command is valid for zones with DNSSEC signing and automatic key management
enabled. Note that complete key rollover consists of several steps and the blocking
mode relates to the initial one only! (#)

zone-ksk-submitted zone...
Use when the zone's KSK rollover is in submission phase. By calling this command
the user confirms manually that the parent zone contains DS record for the new KSK
in submission phase and the old KSK can be retired. (#)

zone-freeze [zone...]
Trigger a zone freeze. All running events will be finished and all new and pending
(planned) zone-changing events (load, refresh, update, flush, and DNSSEC signing)
will be held up until the zone is thawed. (#)

zone-thaw [zone...]
Trigger dismissal of zone freeze. (#)

zone-xfr-freeze [zone...]
Temporarily disable outgoing AXFR/IXFR for the zone(s). (#)

zone-xfr-thaw [zone...]
Dismiss outgoing XFR freeze. (#)

zone-read zone [owner [type]]
Get zone data that are currently being presented.

zone-begin zone...
Begin a zone transaction.

zone-commit zone...
Commit the zone transaction. All changes are applied to the zone.

zone-abort zone...
Abort the zone transaction. All changes are discarded.

zone-diff zone
Get zone changes within the transaction.

zone-get zone [owner [type]]
Get zone data within the transaction.

zone-set zone owner [ttl] type rdata
Add zone record within the transaction. The first record in a rrset requires a ttl
value specified.

zone-unset zone owner [type [rdata]]
Remove zone data within the transaction.

zone-purge zone... [+orphan] [filter...]
Purge zone data, zone file, journal, timers, and/or KASP data of specified zones.
Available filters are +expire, +zonefile, +journal, +timers, +kaspdb, and +catalog.
If no filter is specified, all filters are enabled. If the zone is no longer
configured, add +orphan parameter (zone file cannot be purged in this case). When
purging orphans, always check the server log for possible errors. For proper
operation, it's necessary to prevent ongoing changes to the zone and triggering of
zone related events during purge; use of zone-freeze is advisable. This command
always requires the force option. (#)

zone-stats zone [module[.counter]]
Show zone statistics counter(s). To print also counters with value 0, use force
option.

conf-init
Initialize the configuration database. If the database doesn't exist yet, execute
this command as an intended user to ensure the server is permitted to access the
database (e.g. sudo -u knot knotc conf-init). (*)

conf-check
Check the server configuration. (*)

conf-import filename [+nopurge]
Import a configuration file into the configuration database. If the database
doesn't exist yet, execute this command as an intended user to ensure the server is
permitted to access the database (e.g. sudo -u knot knotc conf-import ...). An
optional filter +nopurge prevents possibly existing configuration database from
purging before the import itself. Also ensure the server is not using the
configuration database at the same time! (*)

conf-export [filename]
Export the configuration database into a config file or stdout. (*)

conf-list [item]
List the configuration database sections or section items.

conf-read [item]
Read the item from the active configuration database.

conf-begin
Begin a writing configuration database transaction. Only one transaction can be
opened at a time.

conf-commit
Commit the configuration database transaction.

conf-abort
Rollback the configuration database transaction.

conf-diff [item]
Get the item difference in the transaction.

conf-get [item]
Get the item data from the transaction.

conf-set item [data...]
Set the item data in the transaction.

conf-unset [item] [data...]
Unset the item data in the transaction.

Notes
Empty or -- zone parameter means all zones or all zones with a transaction.

Use @ owner to denote the zone name.

Type item parameter in the form of section[[id]][.name].

(*) indicates a local operation which requires a configuration.

(#) indicates an optionally blocking operation.

The -b and -f options can be placed right after the command name.

Responses returned by knotc commands depend on the mode:

• In the blocking mode, knotc reports if an error occurred during processing of the
command by the server. If an error is reported, a more detailed information about the
failure can usually be found in the server log.

• In the non-blocking (default) mode, knotc doesn't report processing errors. The OK
response to triggering commands means that the command has been successfully sent to the
server. To verify if the operation succeeded, it's necessary to check the server log.

Actions zone-flush, zone-backup, and zone-restore are carried out by the knotd process.
The directory specified must be accessible to the user account that knotd runs under and
if the directory already exists, its permissions must be appropriate for that user
account.

Interactive mode
The utility provides interactive mode with basic line editing functionality, command
completion, and command history.

Interactive mode behavior can be customized in ~/.editrc. Refer to editrc(5) for details.

Command history is saved in ~/.knotc_history.

EXIT VALUES

       Exit status of 0 means successful operation. Any other exit status indicates an error.

EXAMPLES

   Reload the whole server configuration
          $ knotc reload

   Flush the example.com and example.org zones
          $ knotc zone-flush example.com example.org

   Get the current server configuration
          $ knotc conf-read server

   Get the list of the current zones
          $ knotc conf-read zone.domain

   Get the primary servers for the example.com zone
          $ knotc conf-read 'zone[example.com].master'

   Add example.org zone with a zonefile location
          $ knotc conf-begin
          $ knotc conf-set 'zone[example.org]'
          $ knotc conf-set 'zone[example.org].file' '/var/zones/example.org.zone'
          $ knotc conf-commit

   Get the SOA record for each configured zone
          $ knotc zone-read -- @ SOA

AUTHOR

       CZ.NIC Labs <https://www.knot-dns.cz>

COPYRIGHT

       Copyright 2010–2024, CZ.NIC, z.s.p.o.