[Kea-users] Unable to re-allocate address

Wed Jul 7 18:36:26 UTC 2021

Hi, 

Can you check that your system/kea and the database back-end use the same timezone? 
The timezones should match and should be set to UTC. 

Thank you, 
Razvan 

From: "Jeronimo" <jscmenezes at gmail.com> 
To: "Gordon Ross" <gr306 at cam.ac.uk> 
Cc: Kea-users at lists.isc.org 
Sent: Wednesday, July 7, 2021 8:11:49 PM 
Subject: Re: [Kea-users] Unable to re-allocate address 

Follow my configuration: 

kea-dhcp4.conf: 

{ 
"Dhcp4": { 
"authoritative": false, 
"boot-file-name": "", 
"calculate-tee-times": false, 
"control-socket": { 
"socket-name": "/tmp/kea4-ctrl-socket", 
"socket-type": "unix" 
}, 
"ddns-generated-prefix": "myhost", 
"ddns-override-client-update": false, 
"ddns-override-no-update": false, 
"ddns-qualifying-suffix": "", 
"ddns-replace-client-name": "never", 
"ddns-send-updates": true, 
"decline-probation-period": 86400, 
"dhcp-ddns": { 
"enable-updates": false, 
"max-queue-size": 1024, 
"ncr-format": "JSON", 
"ncr-protocol": "UDP", 
"sender-ip": "0.0.0.0", 
"sender-port": 0, 
"server-ip": "127.0.0.1", 
"server-port": 53001 
}, 
"dhcp-queue-control": { 
"capacity": 64, 
"enable-queue": false, 
"queue-type": "kea-ring4" 
}, 
"dhcp4o6-port": 0, 
"echo-client-id": true, 
"expired-leases-processing": { 
"flush-reclaimed-timer-wait-time": 25, 
"hold-reclaimed-time": 3600, 
"max-reclaim-leases": 100, 
"max-reclaim-time": 250, 
"reclaim-timer-wait-time": 10, 
"unwarned-reclaim-cycles": 5 
}, 
"hooks-libraries": [ ], 
"host-reservation-identifiers": [ "hw-address", "duid", "circuit-id", "client-id" ], 
"hostname-char-replacement": "", 
"hostname-char-set": "[^A-Za-z0-9.-]", 
"interfaces-config": { 
"interfaces": [ "ens3" ], 
"re-detect": true 
}, 
"lease-database": { 
"host": "dbhost.localdomin", 
"name": "dbname", 
"password": "secret", 
"port": 5432, 
"type": "postgresql", 
"user": "dbuser" 
}, 
"loggers": [ 
{ 
"debuglevel": 99, 
"name": "kea-dhcp4", 
"output_options": [ 
{ 
"output": "/usr/local/var/log/kea-dhcp4.log" 
} 
], 
"severity": "INFO" 
} 
], 
"match-client-id": true, 
"multi-threading": { 
"enable-multi-threading": false, 
"packet-queue-size": 64, 
"thread-pool-size": 0 
}, 
"next-server": "0.0.0.0", 
"option-data": [ ], 
"option-def": [ ], 
"rebind-timer": 2000, 
"renew-timer": 1000, 
"reservation-mode": "all", 
"sanity-checks": { 
"lease-checks": "warn" 
}, 
"server-hostname": "", 
"server-tag": "", 
"shared-networks": [ ], 
"statistic-default-sample-age": 0, 
"statistic-default-sample-count": 20, 
"store-extended-info": false, 
"subnet4": [ 
{ 
"4o6-interface": "", 
"4o6-interface-id": "", 
"4o6-subnet": "", 
"calculate-tee-times": false, 
"id": 1, 
"option-data": [ ], 
"pools": [ 
{ 
"option-data": [ ], 
"pool": "192.168.0.10-192.168.0.13" 
} 
], 
"rebind-timer": 2000, 
"relay": { 
"ip-addresses": [ ] 
}, 
"renew-timer": 1000, 
"reservations": [ 
{ 
"boot-file-name": "", 
"client-classes": [ ], 
"hostname": "", 
"hw-address": "00:50:01:00:01:00", 
"ip-address": "192.168.0.12", 
"next-server": "0.0.0.0", 
"option-data": [ ], 
"server-hostname": "" 
} 
], 
"store-extended-info": false, 
"subnet": " 192.168.0.0/24 ", 
"t1-percent": 0.5, 
"t2-percent": 0.875, 
"valid-lifetime": 4000 
} 
], 
"t1-percent": 0.5, 
"t2-percent": 0.875, 
"valid-lifetime": 4000 
} 
} 

Regards, 

Jerônimo 

Em qua., 7 de jul. de 2021 às 03:42, Gordon Ross < gr306 at cam.ac.uk > escreveu: 

My configuration is very simple. There are no hooks, no HA, no multi-threading, no fancy commands. 

Postgres version is 12.7 

Gordon. 

On 06/07/2021, 19:27, "Marcin Siodelski" < marcin at isc.org > wrote: 

Gordon, 

Thanks for posting your issue to the Kea users list. I will try to 
replicate your issue tomorrow with the Postgres lease database backend. 

It will be super useful if you send me your Kea configuration file. You 
can sanitize it from any private stuff it may contain. Please send it to 
me privately if it can't be posted to the mail list. 

If it is not possible, please describe the major parts of the 
configuration, e.g. is multi threading on or off, are you using any 
hooks libraries (e.g. lease cmds?), are you sending any commands to Kea 
that can possibly modify the lease information? 

Finally, please provide your Postgres database version. 

Kind Regards, 

Marcin Siodelski 
DHCP Software Engineer, 
ISC 

On 06.07.2021 18:28, Gordon Ross wrote: 
> On the off chance, I tried an upgrade to Kea 1.9.9 and the problem persists. 
> 
> Gordon. 
> 
> On 05/07/2021, 16:16, "Kea-users on behalf of Gordon Ross" < kea-users-bounces at lists.isc.org on behalf of gr306 at cam.ac.uk > wrote: 
> 
> I'm running Kea 1.8.2 using the Postgres lease database backend on Ubuntu 20.04 LTS 
> 
> Devices can get a new IPv4 address fine. But when they try to renew their address, it fails and the logs show: 
> 
> ALLOC_ENGINE_V4_ALLOC_ERROR [hwtype=1 00:21:55:02:67:14], cid=[01:00:21:55:02:67:14], tid=0x58cd: error during attempt to allocate an IPv4 address: unable to update lease for address 172.18.5.4 as it does not exist 
> 
> If I delete the entry from the leases table, Kea then happily re-issues the address. (I can perform the DELETE as the Kea DB user so no permissions problems there) 
> 
> I saw an earlier post about an error in Kea 1.8 & HA, but I'm not running HA at the moment - and I'm on a later version of Kea. 
> 
> Is this bug still outstanding in 1.8.2? 
> 
> Thank you, 
> 
> Gordon 
> -- 
> Gordon Ross 
> University of Cambridge 
> 
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