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Opened by Wlodzimierz Wencel@wlodek
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kea return error when receive 'get-config' command after being reconfigured with kea-netconf

Yang configuration:

<?xml version="1.0" ?>
<config xmlns="urn:ietf:params:xml:ns:yang:kea-dhcp4-server">
        <interfaces-config>
                <interfaces>enp0s9</interfaces>
        </interfaces-config>
        <client-classes/>
        <expired-leases-processing/>
        <option-data-list>
                <option-data>
                        <code>2</code>
                        <space>dhcp4</space>
                        <data>50</data>
                        <name>time-offset</name>
                </option-data>
        </option-data-list>
        <control-socket>
                <socket-name>/home/wlodek/installed/git/var/kea/control_socket</socket-name>
                <socket-type>unix</socket-type>
        </control-socket>
        <lease-database>
                <database-type>memfile</database-type>
                <name>/home/wlodek/installed/git/var/kea/kea-leases4.csv</name>
        </lease-database>
        <subnet4>
                <subnet4>
                        <id>1</id>
                        <subnet>192.168.51.0/24</subnet>
                        <valid-lifetime>4000</valid-lifetime>
                        <renew-timer>1000</renew-timer>
                        <rebind-timer>2000</rebind-timer>
                        <interface>enp0s9</interface>
                        <option-data-list/>
                        <relay>
                                <ip-addresses>192.12.11.4</ip-addresses>
                        </relay>
                        <pools>
                                <pool>
                                        <start-address>192.168.51.50</start-address>
                                        <end-address>192.168.51.50</end-address>
                                        <option-data-list/>
                                </pool>
                        </pools>
                </subnet4>
        </subnet4>
</config>

Kea uses this configuration and assign address 192.168.51.50, but when I send 'get-config' to kea4 it sends back:

{
  "result": 1,
  "text": "Error during command processing: unknown DB access parameter: max-reconnect-tries=0"
}

and logs:

2018-11-07 08:02:00.045 INFO  [kea-dhcp4.commands/5027] COMMAND_RECEIVED Received command 'config-get'
2018-11-07 08:02:00.045 WARN  [kea-dhcp4.commands/5027] COMMAND_PROCESS_ERROR2 Error while processing command: unknown DB access parameter: max-reconnect-tries=0

When I checked logs from reconfiguration it looks like not everything went 100% correct:

2018-11-07 07:58:21.431 INFO  [kea-dhcp4.dhcpsrv/5027] DHCPSRV_CFGMGR_NEW_SUBNET4 a new subnet has been added to configuration: 192.168.51.0/24 with params: t1=1000, t2=2000, valid-lifetime=4000
2018-11-07 07:58:21.431 INFO  [kea-dhcp4.dhcp4/5027] DHCP4_CONFIG_COMPLETE DHCPv4 server has completed configuration: added IPv4 subnets: 1; DDNS: disabled
2018-11-07 07:58:21.431 INFO  [kea-dhcp4.dhcpsrv/5027] DHCPSRV_MEMFILE_DB opening memory file lease database: lfc-interval=3600 max-reconnect-tries=0 name=/home/wlodek/installed/git/var/kea/kea-leases4.csv persist=true readonly=false reconnect-wait-time=0 tcp-keepalive=0 tcp-nodelay=true type=memfile universe=4
2018-11-07 07:58:21.431 INFO  [kea-dhcp4.dhcpsrv/5027] DHCPSRV_MEMFILE_LEASE_FILE_LOAD loading leases from file /home/wlodek/installed/git/var/kea/kea-leases4.csv

Why values readonly=false reconnect-wait-time=0 tcp-keepalive=0 tcp-nodelay=true max-reconnect-tries=0 are added to memfile configuration?

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