Discussion :

[dexter74]

Bonjour,

Je rencontre un problèmes pour la mise en service d'un serveur DHCP après le redémarrage du serveur, il est down.

IP Link

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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether e2:85:c1:26:d9:af brd ff:ff:ff:ff:ff:ff
    altname enp0s18

Interfaces:

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#########################################
source /etc/network/interfaces.d/*
 
##########################################
# Adresse de bouclage
auto lo
iface lo inet loopback
 
##########################################
# Interface principale en Statique
auto ens18
allow-hotplug ens18
iface ens18 inet static
 address         192.168.10.5
 netmask         255.255.255.0
 gateway         192.168.10.1
 dns-nameservers 192.168.10.1

Procédure d'installation du DHCP

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apt install -y isc-dhcp-server;

Erreur Après installation

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Job for isc-dhcp-server.service failed because the control process exited with error code.
See "systemctl status isc-dhcp-server.service" and "journalctl -xe" for details.
invoke-rc.d: initscript isc-dhcp-server, action "start" failed.
● isc-dhcp-server.service - LSB: DHCP server
     Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
     Active: failed (Result: exit-code) since Sun 2023-10-01 07:27:44 CEST; 3ms ago
       Docs: man:systemd-sysv-generator(8)
    Process: 611 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=1/FAILURE)
        CPU: 16ms
 
oct. 01 07:27:42 sldebian dhcpd[626]: before submitting a bug.  These pages explain the proper
oct. 01 07:27:42 sldebian dhcpd[626]: process and the information we find helpful for debugging.
oct. 01 07:27:42 sldebian dhcpd[626]:
oct. 01 07:27:42 sldebian dhcpd[626]: exiting.
oct. 01 07:27:44 sldebian isc-dhcp-server[611]: Starting ISC DHCPv4 server: dhcpdcheck syslog for diagnostics. ...
oct. 01 07:27:44 sldebian isc-dhcp-server[631]:  failed!
oct. 01 07:27:44 sldebian isc-dhcp-server[632]:  failed!
oct. 01 07:27:44 sldebian systemd[1]: isc-dhcp-server.service: Control process exited, code=exited, status=1/FAILURE
oct. 01 07:27:44 sldebian systemd[1]: isc-dhcp-server.service: Failed with result 'exit-code'.
oct. 01 07:27:44 sldebian systemd[1]: Failed to start LSB: DHCP server.
Traitement des actions différées («*triggers*») pour libc-bin (2.31-13+deb11u6)*...
Traitement des actions différées («*triggers*») pour man-db (2.9.4-2)*...

/etc/default/isc-dhcp-server

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echo 'DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
DHCPDv4_PID=/var/run/dhcpd.pid
INTERFACESv4="ens18" ' >  /etc/default/isc-dhcp-server;

/etc/dhcp/dhcpd.conf

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subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.20 192.168.10.30;
default-lease-time 86400;
max-lease-time 676800;
# option domain-name-servers 192.168.10.1;
# option domain-name lan.local;
option netbios-name-servers 192.168.10.1;
option routers 192.168.10.1;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.10.255;
}

Démarrage manuel du service.

Etat du service

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root@sldebian:~# systemctl status isc-dhcp-server;
● isc-dhcp-server.service - LSB: DHCP server
     Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
     Active: active (running) since Sun 2023-10-01 07:25:51 CEST; 3min 45s ago
       Docs: man:systemd-sysv-generator(8)
    Process: 1630 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=0/SUCCESS)
      Tasks: 4 (limit: 2322)
     Memory: 4.7M
        CPU: 15ms
     CGroup: /system.slice/isc-dhcp-server.service
             └─1642 /usr/sbin/dhcpd -4 -q -cf /etc/dhcp/dhcpd.conf ens18
 
oct. 01 07:25:49 sldebian systemd[1]: Starting LSB: DHCP server...
oct. 01 07:25:49 sldebian isc-dhcp-server[1630]: Launching IPv4 server only.
oct. 01 07:25:49 sldebian dhcpd[1642]: Wrote 0 leases to leases file.
oct. 01 07:25:49 sldebian dhcpd[1642]: Server starting service.
oct. 01 07:25:51 sldebian isc-dhcp-server[1630]: Starting ISC DHCPv4 server: dhcpd.
oct. 01 07:25:51 sldebian systemd[1]: Started LSB: DHCP server.

Relance de la machine

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root@sldebian:~# systemctl --failed
  UNIT                    LOAD   ACTIVE SUB    DESCRIPTION
● isc-dhcp-server.service loaded failed failed LSB: DHCP server
 
 
root@sldebian:~# journalctl -xe -u isc-dhcp-server.service
░░ Support: https://www.debian.org/support
░░
░░ The unit isc-dhcp-server.service has successfully entered the 'dead' state.
oct. 01 07:30:19 sldebian systemd[1]: Stopped LSB: DHCP server.
░░ Subject: L'unité (unit) isc-dhcp-server.service a terminé son arrêt
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ L'unité (unit) isc-dhcp-server.service a terminé son arrêt.
-- Boot 1d5b3020b5e74037ac2b10a11eb2ffa9 --
oct. 01 09:14:14 sldebian systemd[1]: Starting LSB: DHCP server...
░░ Subject: L'unité (unit) isc-dhcp-server.service a commencé à démarrer
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ L'unité (unit) isc-dhcp-server.service a commencé à démarrer.
oct. 01 09:14:14 sldebian isc-dhcp-server[298]: Launching IPv4 server only.
oct. 01 09:14:14 sldebian dhcpd[361]: Wrote 0 leases to leases file.
oct. 01 09:14:14 sldebian dhcpd[361]:
oct. 01 09:14:14 sldebian dhcpd[361]: No subnet declaration for ens18 (no IPv4 addresses).
oct. 01 09:14:14 sldebian dhcpd[361]: ** Ignoring requests on ens18.  If this is not what
oct. 01 09:14:14 sldebian dhcpd[361]:    you want, please write a subnet declaration
oct. 01 09:14:14 sldebian dhcpd[361]:    in your dhcpd.conf file for the network segment
oct. 01 09:14:14 sldebian dhcpd[361]:    to which interface ens18 is attached. **
oct. 01 09:14:14 sldebian dhcpd[361]:
oct. 01 09:14:14 sldebian dhcpd[361]:
oct. 01 09:14:14 sldebian dhcpd[361]: Not configured to listen on any interfaces!
oct. 01 09:14:14 sldebian dhcpd[361]:
oct. 01 09:14:14 sldebian dhcpd[361]: If you think you have received this message due to a bug rather
oct. 01 09:14:14 sldebian dhcpd[361]: than a configuration issue please read the section on submitting
oct. 01 09:14:14 sldebian dhcpd[361]: bugs on either our web page at www.isc.org or in the README file
oct. 01 09:14:14 sldebian dhcpd[361]: before submitting a bug.  These pages explain the proper
oct. 01 09:14:14 sldebian dhcpd[361]: process and the information we find helpful for debugging.
oct. 01 09:14:14 sldebian dhcpd[361]:
oct. 01 09:14:14 sldebian dhcpd[361]: exiting.
oct. 01 09:14:16 sldebian isc-dhcp-server[298]: Starting ISC DHCPv4 server: dhcpdcheck syslog for diagnostics. ...
oct. 01 09:14:16 sldebian isc-dhcp-server[473]:  failed!
oct. 01 09:14:16 sldebian isc-dhcp-server[474]:  failed!
oct. 01 09:14:16 sldebian systemd[1]: isc-dhcp-server.service: Control process exited, code=exited, status=1/FAILURE
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ An ExecStart= process belonging to unit isc-dhcp-server.service has exited.
░░
░░ The process' exit code is 'exited' and its exit status is 1.
oct. 01 09:14:16 sldebian systemd[1]: isc-dhcp-server.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ The unit isc-dhcp-server.service has entered the 'failed' state with result 'exit-code'.
oct. 01 09:14:16 sldebian systemd[1]: Failed to start LSB: DHCP server.
░░ Subject: L'unité (unit) isc-dhcp-server.service a échoué
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░
░░ L'unité (unit) isc-dhcp-server.service a échoué, avec le résultat failed.