No subnet declaration; Can't open /var/lib/dhcp/dhcpd.leases for append

[A]

Hello,

I've never setup a dhcp server before and I've been struggling with the 
below issues for several days.  While I did find two solutions that 
worked for others, they didn't work for me. Hopefully someone here can 
tell me how & where I'm messing things up.

As you can see from the below output, I'm getting "No subnet 
declaration" and also "Can't open /var/lib/dhcp/dhcpd.leases for 
append".  Perhaps they're related?

Thank you in advance for any solutions and/or helpful suggestions!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ubuntu 16.04

root at yellow:~# dhcpd -d -user dhcpd -group dhcpd

Internet Systems Consortium DHCP Server 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /etc/dhcp/dhcpd.conf
Database file: /var/lib/dhcp/dhcpd.leases
PID file: /var/run/dhcpd.pid
Can't open /var/lib/dhcp/dhcpd.leases for append.

If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug.  These pages explain the proper
process and the information we find helpful for debugging..

exiting.
root at yellow:~#


root at yellow:~# dhcpd -t -user dhcpd -group dhcpd
Internet Systems Consortium DHCP Server 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /etc/dhcp/dhcpd.conf
Database file: /var/lib/dhcp/dhcpd.leases
PID file: /var/run/dhcpd.pid


# systemctl restart isc-dhcp-server

# systemctl status isc-dhcp-server
● isc-dhcp-server.service - ISC DHCP IPv4 server
    Loaded: loaded (/lib/systemd/system/isc-dhcp-server.service; 
enabled; vendor preset: enabled)
    Active: active (running) since Fri 2018-01-26 10:49:55 PST; 23s ago
      Docs: man:dhcpd(8)
  Main PID: 20023 (dhcpd)
    CGroup: /system.slice/isc-dhcp-server.service
            └─20023 dhcpd -user dhcpd -group dhcpd -f -4 -pf 
/run/dhcp-server/dhcpd.pid -cf /etc/dhcp

Jan 26 10:49:55 yellow dhcpd[20023]: Sending on 
LPF/br0/c8:3a:35:da:42:72/10.1.1.0/24
Jan 26 10:49:55 yellow dhcpd[20023]:
Jan 26 10:49:55 yellow dhcpd[20023]: No subnet declaration for wlp2s0 
(no IPv4 addresses).
Jan 26 10:49:55 yellow dhcpd[20023]: ** Ignoring requests on wlp2s0.  If 
this is not what
Jan 26 10:49:55 yellow dhcpd[20023]:    you want, please write a subnet 
declaration
Jan 26 10:49:55 yellow dhcpd[20023]:    in your dhcpd.conf file for the 
network segment
Jan 26 10:49:55 yellow dhcpd[20023]:    to which interface wlp2s0 is 
attached. **
Jan 26 10:49:55 yellow dhcpd[20023]:
Jan 26 10:49:55 yellow dhcpd[20023]: Sending on Socket/fallback/fallback-net
Jan 26 10:49:55 yellow dhcpd[20023]: Server starting service.

# cat /etc/dhcp/dhcpd.conf


ddns-update-style none;
option domain-name "FQDN";
option domain-name-servers 10.1.1.1, 8.8.4.4, 50.23.197.95;

default-lease-time 86400;
max-lease-time 604800;

authoritative;

log-facility local7;


subnet 10.1.1.0 netmask 255.255.255.0 {
*interface wlp2s0;*
         option domain-name-servers 10.1.1.1;
         max-lease-time 7200;
         default-lease-time 600;
         range 10.1.1.10 10.1.1.250;
         option subnet-mask 255.255.255.0;
         option broadcast-address 10.1.1.255;
         option routers 10.1.1.1;


     group {


         host yellow {
             hardware ethernet f0:7d:24:c2:c4:13;
             fixed-address 10.1.1.1;
         }

         host blue {
             hardware ethernet 00:23:ea:d1:c2:61;
             fixed-address 10.1.1.2;
         }
     }
}








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