Thanks for the advice / pointers. I've updated the config (behaviour is the same).
One thing I've also noticed is that if I add in a ddns configuration, DHCP requests from the reserved host doesn't trigger a ddns update, whereas other requests do. I wonder if that's related? Andrew On Thu, 4 Jan 2024, at 9:51 PM, Darren Ankney wrote: > Hi Andrew, > > This is also probably not the solution to these logs, but I notice you > also have: "reservation-mode": "out-of-pool", See here: > https://kea.readthedocs.io/en/kea-2.4.1/arm/dhcp6-srv.html#fine-tuning-dhcpv6-host-reservation > where it explains that this is deprecated: "Since Kea 1.9.1, the > reservation-mode parameter is replaced by the reservations-global, > reservations-in-subnet and reservations-out-of-pool flags. The flags > can be activated independently and can produce various combinations, > some of them being unsupported by the deprecated reservation-mode." > > Additionally, you may want to move the reservations-global, > reservations-in-subnet and reservations-out-of-pool flags to the > global area. Their intention is to make allocations happen with less > CPU by telling Kea where it might find reservations. So, at least the > "reservations-global": false, parameter should be global to prevent > kea from wasting time looking there for a reservation. > > You can, of course, suppress these log messages by setting a specific > logger for kea-dhcp6.alloc-engine and setting severity to ERROR which > will cause only ERROR and FATAL messages from the > kea-dhcp6.alloc-engine logger to be logged see here: > https://kb.isc.org/docs/kea-logging-configuration and here: > https://kea.readthedocs.io/en/kea-2.4.1/arm/logging.html for further > information. > > Thank you, > > Darren Ankney > > On Thu, Jan 4, 2024 at 12:51 PM Andrew Rowson via Kea-users > <kea-users@lists.isc.org> wrote: >> >> My bad - typo in the email. It's correct on the server: >> >> "subnet": "2001:123:456:e8b0::/64", >> "reservations-global": false, >> "reservations-in-subnet": true, >> "reservations-out-of-pool": true, >> "reservations": [ >> >> On Thu, 4 Jan 2024, at 5:17 PM, Bob Harold wrote: >> > On Thu, Jan 4, 2024 at 12:10 PM Andrew Rowson via Kea-users >> > <kea-users@lists.isc.org> wrote: >> >> Hi, >> >> >> >> I'm using isc-kea-dhcp6 (2.4.1-isc20231123184533) on Debian bookworm and >> >> am having a minor logging issue. I've got a minimal config that defines a >> >> single subnet, an allocatable pool within that subnet and a single >> >> reservation. >> >> >> >> The host gets its reserved IP successfully, but there's always a WARN log >> >> dance in the kea logs with ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET, >> >> ALLOC_ENGINE_V6_ALLOC_FAIL_NO_POOLS and >> >> ALLOC_ENGINE_V6_ALLOC_FAIL_CLASSES. >> >> >> >> Are these warnings expected, or have I misunderstood something about the >> >> configuration? >> >> >> >> Thanks, >> >> Andrew >> >> >> >> Config: >> >> >> >> { >> >> "Dhcp6": { >> >> "interfaces-config": { >> >> "interfaces": [ >> >> "enp1s0.2", >> >> ] >> >> }, >> >> "lease-database": { >> >> "lfc-interval": 1800, >> >> "name": "/var/lib/kea/kea-leases6.csv", >> >> "type": "memfile" >> >> }, >> >> "subnet6": [ >> >> { >> >> "interface": "enp1s0.2", >> >> "reservation-mode": "out-of-pool", >> >> "pools": [ >> >> { >> >> "pool": "2001:123:456:e8b0:beef:f00f::/112" >> >> } >> >> ], >> >> "reservations-global": false, >> >> "reservations-in-subnet": true, >> >> "eservations-out-of-pool": true, >> > >> > Probably not the solution, but the line above seems to be missing the >> > first letter. Is it that way on the server? >> > >> >> "subnet": "2001:123:456:e8b0::/64", >> >> "reservations": [ >> >> { >> >> "duid": "00:03:00:01:b8:27:eb:bf:db:dd", >> >> "hostname": "myhost", >> >> "ip-addresses": [ >> >> "2001:123:456:e8b0::f" >> >> ] >> >> } >> >> ] >> >> } >> >> ], >> >> "valid-lifetime": 1800 >> >> } >> >> } >> >> >> >> Logs: >> >> >> >> INFO [kea-dhcp6.dhcp6/182198.139733472774592] DHCP6_STARTED Kea >> >> DHCPv6 server version 2.4.1 started >> >> INFO [kea-dhcp6.leases/182198.139733433005760] DHCP6_LEASE_ADVERT >> >> duid=[00:03:00:01:b8:27:eb:bf:db:dd], tid=0x3e9640: lease for address >> >> 2001:123:456:e8b0::f and iaid=1746070577 will be advertised >> >> WARN [kea-dhcp6.alloc-engine/182198.139733433005760] >> >> ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET duid=[00:03:00:01:b8:27:eb:bf:db:dd], >> >> tid=0x3e9640: failed to allocate an IPv6 lease in the subnet >> >> 2001:123:456:e8b0::/64, subnet-id 1, shared network (none) >> >> WARN [kea-dhcp6.alloc-engine/182198.139733433005760] >> >> ALLOC_ENGINE_V6_ALLOC_FAIL_NO_POOLS duid=[00:03:00:01:b8:27:eb:bf:db:dd], >> >> tid=0x3e9640: no pools were available for the lease allocation >> >> WARN [kea-dhcp6.alloc-engine/182198.139733433005760] >> >> ALLOC_ENGINE_V6_ALLOC_FAIL_CLASSES duid=[00:03:00:01:b8:27:eb:bf:db:dd], >> >> tid=0x3e9640: Failed to allocate an IPv6 address for client with classes: >> >> ALL, KNOWN >> >> INFO [kea-dhcp6.leases/182198.139733424613056] DHCP6_LEASE_ALLOC >> >> duid=[00:03:00:01:b8:27:eb:bf:db:dd], tid=0x137d91: lease for address >> >> 2001:123:456:e8b0::f and iaid=1746070577 has been allocated for 1800 >> >> seconds >> >> -- >> >> >> > -- >> > Bob Harold >> -- >> ISC funds the development of this software with paid support subscriptions. >> Contact us at https://www.isc.org/contact/ for more information. >> >> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. >> >> Kea-users mailing list >> Kea-users@lists.isc.org >> https://lists.isc.org/mailman/listinfo/kea-users > -- > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. > > Kea-users mailing list > Kea-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/kea-users -- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. Kea-users mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users
