[Kea-users] ALLOC_ENGINE_V6_ALLOC_NO_LEASES_HR and ALLOC_ENGINE_V6_ALLOC_UNRESERVED

[perl-list]

memfile is supported

"lease-database": {
            "type": "memfile",
            "persist": true,
            "name": "/var/state/kea/dhcp6.leases"
        },

Kea should periodically launch kea-lfc to cleanup the lease file in the case of memfile.  I'm not sure about other lease storage methods as I've not used them.

----- Original Message -----
> From: "Veronique Lefebure" <Veronique.Lefebure at cern.ch>
> To: "kea-users" <kea-users at lists.isc.org>
> Sent: Wednesday, June 22, 2022 4:36:21 AM
> Subject: Re: [Kea-users] ALLOC_ENGINE_V6_ALLOC_NO_LEASES_HR and ALLOC_ENGINE_V6_ALLOC_UNRESERVED

> Replying to myself:

> The problem has been solved by deleting the lease files which was containing
> stale lease information from previous tests.

> Is there a tool that an admin can use to remove stale entries from a lease file
> ?

> By the way, I have tries to use kea-admin to have a look at the leases but it
> exists with:

> kea-admin lease-dump memfile
> ERROR/kea-admin: lease-dump is not supported for memfile

> While the help says:

> Usage: /usr/sbin/kea-admin COMMAND BACKEND [parameters]

> COMMAND: Currently supported operations are:
> - db-init: Initializes new database. Useful for first time installation.
> - db-version: Checks version of the existing database schema. Useful
> - for checking database version when preparing for an upgrade.
> - db-upgrade: Upgrades your database schema.
> - lease-dump: Dumps current leases to a memfile-ready CSV file.
> - lease-upload: Uploads leases from a CSV file to the database.
> - stats-recount: Recounts lease statistics.

> BACKEND - one of the supported backends: memfile|mysql|pgsql

> Is "memfile" really supported ?

> Thanks,
> Veronique

>> On 21/06/2022 16:59 Veronique Lefebure <veronique.lefebure at cern.ch> wrote:

>> Hi,
>> Out test client is failing to get an IPv6 IP.
>> Enabling debug logs, we see messages from the server that seem contradictory:

>> 2022-06-21 16:43:50.948 DEBUG [kea-dhcp6.alloc-engine/13499.139838611867840]
>> ALLOC_ENGINE_V6_ALLOC_NO_LEASES_HR no leases found but reservations exist for
>> client duid=[00:01:00:01:2a:44:7a:5c:xx:xx:xx:xx:xx:xx], tid=0x93e611
>> 2022-06-21 16:43:50.948 DEBUG [kea-dhcp6.alloc-engine/13499.139838611867840]
>> ALLOC_ENGINE_V6_ALLOC_UNRESERVED no static reservations available - trying to
>> dynamically allocate leases for client
>> duid=[00:01:00:01:2a:44:7a:5c:xx:xx:xx:xx:xx:xx], tid=0x93e611

>> where xx:xx:xx:xx:xx:xx is the client mac address.
>> How can that happen ?

>> Kea has correctly identified the subnet where the client reservation is defined:
>> 2022-06-21 16:43:50.947 DEBUG [kea-dhcp6.packets/13499.139838611867840]
>> DHCP6_SUBNET_SELECTED duid=[00:01:00:01:2a:44:7a:5c:xx:xx:xx:xx:xx:xx],
>> tid=0x93e611: the subnet with ID 2156789248 was selected for client assignments

>> Thanks for helping.
>> Veronique
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