I'm encountering the same thing on a fresh installation of Ubuntu 20.04.
Here is what happens right after a reboot:
jeff@bridges:~$ ll /run/ | grep dhcp
jeff@bridges:~$ sudo systemctl status isc-dhcp-server
[sudo] password for jeff:
● 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 Tue 2020-04-28 23:59:43 MST; 11s ago
Docs: man:dhcpd(8)
Main PID: 1374 (dhcpd)
Tasks: 4 (limit: 19047)
Memory: 6.9M
CGroup: /system.slice/isc-dhcp-server.service
└─1374 dhcpd -user dhcpd -group dhcpd -f -4 -pf
/run/dhcp-server/dhcpd.pid -cf /etc/dhcp/dhcpd.conf
Apr 28 23:59:44 bridges dhcpd[1374]:
Apr 28 23:59:44 bridges dhcpd[1374]: Listening on
LPF/enp2s0/2c:60:0c:c6:a4:be/192.168.1.0/24
Apr 28 23:59:44 bridges sh[1374]: Listening on
LPF/enp2s0/2c:60:0c:c6:a4:be/192.168.1.0/24
Apr 28 23:59:44 bridges sh[1374]: Sending on
LPF/enp2s0/2c:60:0c:c6:a4:be/192.168.1.0/24
Apr 28 23:59:44 bridges sh[1374]: Sending on Socket/fallback/fallback-net
Apr 28 23:59:44 bridges sh[1374]: Can't create PID file
/run/dhcp-server/dhcpd.pid: No such file or directory.
Apr 28 23:59:44 bridges dhcpd[1374]: Sending on
LPF/enp2s0/2c:60:0c:c6:a4:be/192.168.1.0/24
Apr 28 23:59:44 bridges dhcpd[1374]: Sending on Socket/fallback/fallback-net
Apr 28 23:59:44 bridges dhcpd[1374]: Can't create PID file
/run/dhcp-server/dhcpd.pid: No such file or directory.
Apr 28 23:59:44 bridges dhcpd[1374]: Server starting service.
jeff@bridges:~$ sudo systemctl restart isc-dhcp-server
jeff@bridges:~$ ll /run/ | grep dhcp
drwxr-xr-x 2 root root 60 Apr 29 00:00
dhcp-server/
jeff@bridges:~$ ll /run/dhcp-server/
total 4
drwxr-xr-x 2 root root 60 Apr 29 00:00 ./
drwxr-xr-x 39 root root 1140 Apr 29 00:00 ../
-rw-r--r-- 1 root root 5 Apr 29 00:00 dhcpd.pid
I can hardcode the PID file names like Nicorac above mentions, but I'd rather
things just work out of the box without needing to apply random workarounds
like that.
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https://bugs.launchpad.net/bugs/1448657
Title:
isc-dhcp-server: Can't create PID file /run/dhcp-server/dhcpd.pid:
Permission denied
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