Thank you for the links, Wlodek!

Here are some sample rows I am loading into the file:

address,hwaddr,client_id,valid_lifetime,expire,subnet_id,fqdn_fwd,fqdn_rev,hostname,state,user_context
172.16.16.12,6c:33:a9:3b:2e:04,,3600,1682423972,1,0,0,2e-04,0,
172.16.16.25,da:32:2d:70:57:37,,3600,1682423972,1,0,0,57-37,0,

If I’m understanding this properly, the lease should last until the expire time 
of 1682423972 which is equivalent to Tue Apr 25 2023 17:49:47 GMT+0000.  
However, if I set the file and wait for the lfc, it empties the data rows of 
the lease file, leaving only the header row.  Currently the lfc-interval is set 
to 3600.

Is there a way to query kea via the cli for the leases it sees other than 
opening the lease file?  Looked for a log file to see if there is any 
information on server startup but even with logging enabled by default, seems 
it did not create a log at /var/log/kea-dhcp4.log as per the conf settings.





--
Rachael Wilson
(509) 422-8374
From: Wlodek Wencel <wlo...@isc.org>
Sent: Friday, April 14, 2023 2:22 AM
To: Rachael Wilson <racha...@okpud.org>; kea-users@lists.isc.org
Subject: Re: [Kea-users] Migrate to Kea from non-ISC DHCP server ***EXTERNAL 
EMAIL***


EXTERNAL EMAIL: Please Think Before You Click!!




Kea has two features that deals with expired leases. Please take a look into 
lease file clean up:
https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html#memfile-basic-storage-for-leases
 (you can easily disable this by setting lfc-interval to 0) and lease 
expiration https://kea.readthedocs.io/en/latest/arm/lease-expiration.html

But none of those processes touch unexpired leases, my guess is that you are 
putting incorrect state of a lease.

There is also lease sanity check feature, but this by default wouldn't remove 
your leases 
https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html#sanity-checks-in-dhcpv4

I hope that our documentation will help you find solution.

Włodek Wencel

QA, ISC
On 13/04/2023 21:21, Rachael Wilson wrote:
Thank you very much Wlodek!  With that info I was able to create a lease file 
for dhcp4.  The only thing is it seems a collector runs at a certain interval 
that cleans up the memfile?  Looks like it blows out any loaded leases before 
they could expire from the old DHCP server.





--
Rachael Wilson
(509) 422-8374
From: Kea-users 
<kea-users-boun...@lists.isc.org><mailto:kea-users-boun...@lists.isc.org> On 
Behalf Of Wlodek Wencel
Sent: Thursday, April 13, 2023 8:48 AM
To: kea-users@lists.isc.org<mailto:kea-users@lists.isc.org>
Subject: Re: [Kea-users] Migrate to Kea from non-ISC DHCP server ***EXTERNAL 
EMAIL***


EXTERNAL EMAIL: Please Think Before You Click!!




Couple simple leases files I took out from our automated testing are attached. 
Please be aware that in user context Kea can store quite extensive info in json 
structure (also attached).

Hope that will help

Wlodek Wencel


On 13/04/2023 16:42, Rachael Wilson wrote:
Thank you, Darren!  I will give perfdhcp a try.





--
Rachael Wilson
(509) 422-8374
From: Kea-users 
<kea-users-boun...@lists.isc.org><mailto:kea-users-boun...@lists.isc.org> On 
Behalf Of Darren Ankney
Sent: Thursday, April 13, 2023 3:27 AM
To: kea-users@lists.isc.org<mailto:kea-users@lists.isc.org>
Subject: Re: [Kea-users] Migrate to Kea from non-ISC DHCP server ***EXTERNAL 
EMAIL***


EXTERNAL EMAIL: Please Think Before You Click!!




Hello Rachael,

There probably isn't an example file anywhere in the documentation (I looked 
also) or if there is, I just didn't find it.  I would suggest setting up a test 
kea server with the memfile lease database persisting to a file.  Then use 
perfdhcp to generate traffic thus populating the file.  If you need specific 
options to appear in the lease file, it is possible to use perfdhcp to generate 
most of them (even if you have to create the hex yourself).

Thank you,

Darren Ankney

On Wed, Apr 12, 2023 at 5:19 PM Rachael Wilson 
<racha...@okpud.org<mailto:racha...@okpud.org>> wrote:
Hi, I would like to migrate a few thousand DHCP leases from a non-ISC DHCP 
server to a memfile backed Kea instance.  Looking through the docs, it seems it 
would be easier to populate the lease file in /var/lib/kea/kea-leases4.csv 
rather than using hooks.  However, in a fresh install the file only contains 
the header row.  Is there an example file populated with rows I could look at 
to properly format the data for import?  Didn’t see anything in the docs, but 
might have missed it.



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Rachael Wilson | Network Analyst
Public Utility District No. 1 Of Okanogan County
Office: (509) 422-8374 | racha...@okpud.org<mailto:racha...@okpud.org>
1331 2nd Ave N., Okanogan, WA 98840 | P.O. Box 912, Okanogan, WA 98840

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