Hi Darren,
thanks for taking care.
One day after, all the other three clients have renewed (I can see the updated
expire time in dhcp4.csv[.2].) All I have in the logs is this:
Nov 10 12:08:17 190 north kea-dhcp-ddns: INFO
[kea-dhcp-ddns.dctl.140480598193344] DCTL_STARTING DhcpDdns starting, pid:
15727, version: 2.6.3 (stable)
Nov 10 12:23:45 190 north kea-dhcp4: INFO [kea-dhcp4.dhcp4.140607992743872]
DHCP4_STARTING Kea DHCPv4 server version 2.6.3 (stable) starting
Nov 10 12:23:45 190 north kea-dhcp4: INFO [kea-dhcp4.commands.140607992743872]
COMMAND_RECEIVED Received command 'config-set'
Nov 10 12:24:55 190 north kea-dhcp4: INFO [kea-dhcp4.dhcp4.140458599126976]
DHCP4_STARTING Kea DHCPv4 server version 2.6.3 (stable) starting
Nov 10 12:24:55 190 north kea-dhcp4: INFO [kea-dhcp4.commands.140458599126976]
COMMAND_RECEIVED Received command 'config-set'
Nov 10 12:25:45 190 north kea-dhcp4: INFO [kea-dhcp4.dhcp4.140267918301120]
DHCP4_STARTING Kea DHCPv4 server version 2.6.3 (stable) starting
Nov 10 12:25:45 190 north kea-dhcp4: INFO [kea-dhcp4.commands.140267918301120]
COMMAND_RECEIVED Received command 'config-set'
Nov 10 12:47:54 190 north kea-dhcp-ddns: INFO
[kea-dhcp-ddns.dctl.140298412311744] DCTL_STARTING DhcpDdns starting, pid:
17117, version: 2.6.3 (stable)
DHCP dialog, as shown by dhcpdum running on the server, looks fine.
Both commands are running with option -c <their config file>. The logging
section for one:
"loggers":
[
{
// This section affects kea-dhcp4, which is the
base logger for DHCPv4
// component. It tells DHCPv4 server to write
all log messages (on
// severity INFO or more) to a file.
"name": "kea-dhcp4",
"output_options":
[
{
"output": "syslog:local7",
// Default is "%-5p [%c.%t]
%m\n";
// %-5p The severity of the
message
// %c The log source. This
includes two elements: kea-dhcp4 and library.
// %i The process ID.
// %t The thread ID.
// %m The log message itself.
"pattern": "%m\n",
// This governs whether the log
output is flushed to disk after
// every write. The default is
true (?)
"flush": false
// This specifies the maximum
size of the file before it is
// rotated.
// "maxsize": 1048576,
// This specifies the maximum
number of rotated files to keep.
// "maxver": 8
}
],
// This specifies the severity of log messages
to keep. Supported values
// are: FATAL, ERROR, WARN, INFO, DEBUG
"severity": "DEBUG",
// If DEBUG level is specified, this value is
used. 0 is least verbose,
// 99 is most verbose. If severity for the
logger is not DEBUG, this
// value is ignored.
"debuglevel": 99
}
]
For the other:
"loggers": [
{
// This specifies the logging for D2 (DHCP-DDNS) daemon.
"name": "kea-dhcp-ddns",
"output-options": [
{
// Specifies the output file. There are several special values
// supported:
// - stdout (prints on standard output)
// - stderr (prints on standard error)
// - syslog (logs to syslog)
// - syslog:name (logs to syslog using specified name)
// Any other value is considered a name of the file
"output": "syslog:local7",
// Shorter log pattern suitable for use with systemd,
// avoids redundant information
"pattern": "%m\n"
// This governs whether the log output is flushed to disk after
// every write.
// "flush": false,
// This specifies the maximum size of the file before it is
// rotated.
// "maxsize": 1048576,
// This specifies the maximum number of rotated files to keep.
// "maxver": 8
}
],
// This specifies the severity of log messages to keep. Supported values
// are: FATAL, ERROR, WARN, INFO, DEBUG
"severity": "DEBUG",
// If DEBUG level is specified, this value is used. 0 is least verbose,
// 99 is most verbose. Be cautious, Kea can generate lots and lots
// of logs if told to do so.
"debuglevel": 99
}
]
One strange thing is their opening the lockfile many times:
818-north:/# for p in $(pgrep -u _kea); do lsof -p $p | grep lockfile; done
kea-dhcp4 21436 _kea 3u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 4u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 5u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 6u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 21u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 22u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 23u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 24u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp4 21436 _kea 25u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp- 21479 _kea 3u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp- 21479 _kea 4u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp- 21479 _kea 6u REG 0,25 0 6
/run/lock/kea/logger_lockfile
kea-dhcp- 21479 _kea 14u REG 0,25 0 6
/run/lock/kea/logger_lockfile
What else can I test?
Best
Ale
On Tue 11/Nov/2025 13:11:03 +0100 Darren Ankney wrote:
Hi Ale,
As a sanity check, is Kea logging other clients messages as expected
if you release and renew?
Thank you,
Darren Ankney
On Mon, Nov 10, 2025 at 7:08 AM Alessandro Vesely <[email protected]> wrote:
Hi,
I recently upgraded to Devuan Excalibur, equivalent to Debian Trixie, and had
some difficulty starting the Kea daemons. Now they're running. However, a
client somehow got a different IP than it had before.
The host name and PTR records still use the previous IP.
I tried to fix it by issuing dhclient -r/ dhclient. As a result, I have
several records showing the new IP in /var/lib/dhcp4.csv, but the DNS records
are unchanged.
In kea-dhcp4 both enable-updates and ddns-send-updates are set to true.
In both kea-dhcp4.conf and kea-dhcp-ddns.conf I set debuglevel to 99, but, upon
restarting, I only got the two lines
kea-dhcp4: INFO [kea-dhcp4.commands.140267918301120] COMMAND_RECEIVED Received
command 'config-set'
and
kea-dhcp-ddns: INFO [kea-dhcp-ddns.dctl.140298412311744] DCTL_STARTING
DhcpDdns starting, pid: 17117, version: 2.6.3 (stable)
Dhcp releases and subsequent discover, offer, request and ack are not logged.
Is there a way to force the DNS to sync?
Best
Ale
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