ISC DHCP Users

Re: dhcp-users Digest, Vol 133, Issue 2

Classic

List

Threaded

3 messages Options

Cayab, Jefrey E.

Re: dhcp-users Digest, Vol 133, Issue 2

Hi,

Thank you for the reply. I checked and there's only 1 instance of dhcpd service. The doubled logging is most likely because of my rsyslog configuration.

More info below:

[root@dhcp ~]#
[root@dhcp ~]# systemctl status dhcpd.service
● dhcpd.service - DHCPv4 Server Daemon
Loaded: loaded (/usr/lib/systemd/system/dhcpd.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2019-11-10 21:23:13 +08; 2h 42min ago
Docs: man:dhcpd(8)
man:dhcpd.conf(5)
Main PID: 5944 (dhcpd)
Status: "Dispatching packets..."
CGroup: /system.slice/dhcpd.service
└─5944 /usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid

Nov 11 00:04:50 dhcp dhcpd[5944]: DHCPREQUEST for 172.250.161.188 (10.16.5.172.) from ac:5f:3e:5f:85:36 (Samsung-Galaxy-S7) via 172.250.0.1
Nov 11 00:04:50 dhcp dhcpd[5944]: DHCPACK on 172.250.161.188 to ac:5f:3e:5f:85:36 (Samsung-Galaxy-S7) via 172.250.0.1
Nov 11 00:04:54 dhcp dhcpd[5944]: DHCPREQUEST for 172.250.192.135 from 3c:05:18:7a:3f:aa (android-87969200872522f7) via 172.250.0.1
Nov 11 00:04:54 dhcp dhcpd[5944]: DHCPACK on 172.250.192.135 to 3c:05:18:7a:3f:aa (android-87969200872522f7) via 172.250.0.1
Nov 11 00:04:57 dhcp dhcpd[5944]: DHCPREQUEST for 172.250.95.224 from 00:1a:dd:50:1c:ec (max-hd4-1282) via eth0
Nov 11 00:04:57 dhcp dhcpd[5944]: DHCPACK on 172.250.95.224 to 00:1a:dd:50:1c:ec (max-hd4-1282) via eth0
Nov 11 00:05:03 dhcp dhcpd[5944]: DHCPREQUEST for 172.157.170.126 from b0:48:1a:c1:68:1d (Shermaine) via 172.157.0.1
Nov 11 00:05:03 dhcp dhcpd[5944]: DHCPACK on 172.157.170.126 to b0:48:1a:c1:68:1d (Shermaine) via 172.157.0.1
Nov 11 00:05:07 dhcp dhcpd[5944]: DHCPINFORM from 172.244.9.177 via 172.244.8.1: not authoritative for subnet 172.244.8.0
Nov 11 00:05:12 dhcp dhcpd[5944]: DHCPINFORM from 172.244.9.177 via 172.244.8.1: not authoritative for subnet 172.244.8.0
[root@dhcp ~]#
[root@dhcp ~]#
[root@dhcp ~]# ps -ef | grep dhcpd
dhcpd 5944 1 3 Nov10? 00:06:35 /usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid
root 6990 6973 0 00:05 pts/0 00:00:00 grep --color=auto dhcpd
[root@dhcp ~]#
[root@dhcp ~]# head -38 /etc/dhcp/dhcpd.conf
# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#

# option definitions common to all supported networks...
option domain-name "domain.local";
option domain-name-servers 10.16.5.106;
option serverip code 43 = ip-address;
class "Vendor-Class" {
match option vendor-class-identifier;
}

default-lease-time 600;
max-lease-time 7200;

# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;

# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.

subnet 0.0.0.0 netmask 0.0.0.0 {
}

...
...
the rest here are the dhcp scopes
...
...
[root@dhcp ~]#
[root@dhcp ~]#
[root@dhcp ~]# cat /etc/rsyslog.conf
$ModLoad imuxsock
$ModLoad imjournal
$WorkDirectory /var/lib/rsyslog
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
$IncludeConfig /etc/rsyslog.d/*.conf
$OmitLocalLogging on
$IMJournalStateFile imjournal.state
$FileCreateMode 0640
*.info;mail.none;authpriv.none;cron.none /var/log/messages
authpriv.* /var/log/secure
cron.* /var/log/cron
*.emerg :omusrmsg:*
mail.* -/var/log/maillog
mail.info -/var/log/mail.info
mail.warning -/var/log/mail.warn
mail.err /var/log/mail.err
news.crit -/var/log/news/news.crit
news.err -/var/log/news/news.err
news.notice -/var/log/news/news.notice
*.=warning;*.=err -/var/log/warn
*.crit /var/log/warn
*.*;mail.none;news.none -/var/log/messages
local0,local1.* -/var/log/localmessages
local2,local3.* -/var/log/localmessages
local4,local5.* -/var/log/localmessages
local6,local7.* -/var/log/localmessages
[root@dhcp ~]#

Thank you

On Sun, Nov 10, 2019 at 10:39 PM <[hidden email]> wrote:

Send dhcp-users mailing list submissions to
[hidden email]

To subscribe or unsubscribe via the World Wide Web, visit
https://lists.isc.org/mailman/listinfo/dhcp-users
or, via email, send a message with subject or body 'help' to
[hidden email]

You can reach the person managing the list at
[hidden email]

When replying, please edit your Subject line so it is more specific
than "Re: Contents of dhcp-users digest..."

Today's Topics:

1. dhcpd restart takes almost 7 minutes in CentOS7 (Cayab, Jefrey E.)
2. Re: dhcpd restart takes almost 7 minutes in CentOS7 (Andrew Bell)

----------------------------------------------------------------------

Message: 1
Date: Sun, 10 Nov 2019 21:43:41 +0800
From: "Cayab, Jefrey E." <[hidden email]>
To: [hidden email]
Subject: dhcpd restart takes almost 7 minutes in CentOS7
Message-ID:
<CAH1A-en-G=6iDmrjX7nM2BfGqM3KQktOr8W9P=[hidden email]>
Content-Type: text/plain; charset="utf-8"

Dear dhcp-users,

I have 110 dhcp scopes in my configuration file and everytime i restart
dhcpd service, it will take 7 minutes to complete - is this normal? Is
there a way to make it restart faster? Appreciate your help. Thank you

[root@dhcp ~]#
[root@dhcp ~]# grep VLAN /etc/dhcp/dhcpd.conf | wc -l
110
[root@dhcp ~]#
[root@dhcp ~]#
[root@dhcp ~]# cat /etc/*release
CentOS Linux release 7.6.1810 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.6.1810 (Core)
CentOS Linux release 7.6.1810 (Core)
[root@dhcp ~]#
[root@dhcp ~]#
[root@dhcp ~]# rpm -qi dhcp
Name : dhcp
Epoch : 12
Version : 4.2.5
Release : 77.el7.centos
Architecture: x86_64
Install Date: Tue 01 Oct 2019 04:14:37 AM +08
Group : System Environment/Daemons
Size : 1449595
License : ISC
Signature : RSA/SHA256, Fri 23 Aug 2019 05:22:17 AM +08, Key ID
24c6a8a7f4a80eb5
Source RPM : dhcp-4.2.5-77.el7.centos.src.rpm
Build Date : Fri 09 Aug 2019 07:10:22 AM +08
Build Host : x86-01.bsys.centos.org
Relocations : (not relocatable)
Packager : CentOS BuildSystem <http://bugs.centos.org>
Vendor : CentOS
URL : http://isc.org/products/DHCP/
Summary : Dynamic host configuration protocol software
Description :
DHCP (Dynamic Host Configuration Protocol) is a protocol which allows
individual devices on an IP network to get their own network
configuration information (IP address, subnetmask, broadcast address,
etc.) from a DHCP server. The overall purpose of DHCP is to make it
easier to administer a large network.

To use DHCP on your network, install a DHCP service (or relay agent),
and on clients run a DHCP client daemon. The dhcp package provides
the ISC DHCP service and relay agent.
[root@dhcp ~]#
[root@dhcp ~]#
[root@dhcp ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 31
[root@dhcp ~]#
[root@dhcp ~]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs
(rw,nosuid,seclabel,size=3974540k,nr_inodes=993635,mode=755)
securityfs on /sys/kernel/security type securityfs
(rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,seclabel,size=5242880k)
devpts on /dev/pts type devpts
(rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs
(ro,nosuid,nodev,noexec,seclabel,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,cpuacct,cpu)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,net_prio,net_cls)
cgroup on /sys/fs/cgroup/cpuset type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,cpuset)
cgroup on /sys/fs/cgroup/freezer type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,freezer)
cgroup on /sys/fs/cgroup/perf_event type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,perf_event)
cgroup on /sys/fs/cgroup/hugetlb type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,hugetlb)
cgroup on /sys/fs/cgroup/memory type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,memory)
cgroup on /sys/fs/cgroup/pids type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,pids)
cgroup on /sys/fs/cgroup/devices type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,devices)
cgroup on /sys/fs/cgroup/blkio type cgroup
(rw,nosuid,nodev,noexec,relatime,seclabel,blkio)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/mapper/vg00-lvroot on / type xfs
(rw,noatime,nodiratime,seclabel,attr2,inode64,noquota)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs
(rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=20052)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel)
mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
/dev/sda2 on /boot type xfs
(rw,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvhome on /home type xfs
(rw,nodev,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvtmp on /tmp type xfs
(rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvvar on /var type xfs
(rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvvartmp on /var/tmp type xfs
(rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvvarlog on /var/log type xfs
(rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
/dev/mapper/vg00-lvaudit on /var/log/audit type xfs
(rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
tmpfs on /run/user/1000 type tmpfs
(rw,nosuid,nodev,relatime,seclabel,size=797300k,mode=700,uid=1000,gid=1000)
[root@dhcp ~]#
[root@dhcp ~]#

logs when "systemctl restart dhcpd" is executed:
[root@dhcp ~]#
[root@dhcp ~]# tail -f /var/log/messages
Nov 10 21:16:56 dhcp polkitd[5349]: Registered Authentication Agent for
unix-process:5937:354512872 (system bus name :1.30076 [/usr/bin/pkttyagent
--notify-fd 5 --fallback], object path
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Nov 10 21:16:56 dhcp systemd: Stopping DHCPv4 Server Daemon...
Nov 10 21:16:56 dhcp systemd: Stopping DHCPv4 Server Daemon...
Nov 10 21:16:56 dhcp named[243904]: resolver priming query complete
Nov 10 21:16:56 dhcp named[243904]: resolver priming query complete
Nov 10 21:16:56 dhcp systemd: Stopped DHCPv4 Server Daemon.
Nov 10 21:16:56 dhcp systemd: Stopped DHCPv4 Server Daemon.
Nov 10 21:16:56 dhcp systemd: Starting DHCPv4 Server Daemon...
Nov 10 21:16:56 dhcp systemd: Starting DHCPv4 Server Daemon...
Nov 10 21:16:56 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 10 21:16:56 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 10 21:16:56 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 10 21:16:56 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 10 21:16:56 dhcp dhcpd: All rights reserved.
Nov 10 21:16:56 dhcp dhcpd: All rights reserved.
Nov 10 21:16:56 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
Nov 10 21:16:56 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
Nov 10 21:16:56 dhcp dhcpd: Warning: subnet 192.168.88.0/24 overlaps subnet
0.0.0.0/-26
Nov 10 21:16:56 dhcp dhcpd: Warning: subnet 192.168.88.0/24 overlaps subnet
0.0.0.0/-26
Nov 10 21:17:12 dhcp dhcpd: WARNING: Host declarations are global. They
are not limited to the scope you declared them in.
Nov 10 21:17:12 dhcp dhcpd: WARNING: Host declarations are global. They
are not limited to the scope you declared them in.
Nov 10 21:17:12 dhcp dhcpd: Not searching LDAP since ldap-server, ldap-port
and ldap-base-dn were not specified in the config file
Nov 10 21:17:12 dhcp dhcpd: Not searching LDAP since ldap-server, ldap-port
and ldap-base-dn were not specified in the config file
Nov 10 21:17:12 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 10 21:17:12 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 10 21:17:12 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 10 21:17:12 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 10 21:17:12 dhcp dhcpd: All rights reserved.
Nov 10 21:17:12 dhcp dhcpd: All rights reserved.
Nov 10 21:17:12 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
Nov 10 21:17:12 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 class decls to leases file.
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 class decls to leases file.
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 deleted host decls to leases file.
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 deleted host decls to leases file.
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.
Nov 10 21:23:12 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.
Nov 10 21:23:13 dhcp dhcpd: Wrote 60199 leases to leases file.
Nov 10 21:23:13 dhcp dhcpd: Wrote 60199 leases to leases file.
Nov 10 21:23:13 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/
0.0.0.0/0
Nov 10 21:23:13 dhcp dhcpd: Sending on LPF/eth0/50:6b:8d:03:a8:b9/
0.0.0.0/0
Nov 10 21:23:13 dhcp dhcpd: Sending on Socket/fallback/fallback-net
Nov 10 21:23:13 dhcp systemd: Started DHCPv4 Server Daemon.
Nov 10 21:23:13 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/
0.0.0.0/0
Nov 10 21:23:13 dhcp dhcpd: Sending on LPF/eth0/50:6b:8d:03:a8:b9/
0.0.0.0/0
Nov 10 21:23:13 dhcp dhcpd: Sending on Socket/fallback/fallback-net
Nov 10 21:23:13 dhcp systemd: Started DHCPv4 Server Daemon.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20191110/dfb4a2d7/attachment-0001.htm>

------------------------------

Message: 2
Date: Sun, 10 Nov 2019 09:38:48 -0500
From: Andrew Bell <[hidden email]>
To: Users of ISC DHCP <[hidden email]>
Subject: Re: dhcpd restart takes almost 7 minutes in CentOS7
Message-ID:
<CAMcY7=[hidden email]>
Content-Type: text/plain; charset="utf-8"

No, that's not even close to normal. I have about 20000 leases in 70 VLANs
and my restart is less than 15 seconds.

Looking at the startup log, it seems that you have two instances running
and being restarted at the same time. That's what you need to look at
first, I think.

On Sun, Nov 10, 2019 at 8:44 AM Cayab, Jefrey E. <[hidden email]> wrote:

> Dear dhcp-users,
>
> I have 110 dhcp scopes in my configuration file and everytime i restart
> dhcpd service, it will take 7 minutes to complete - is this normal? Is
> there a way to make it restart faster? Appreciate your help. Thank you
>
> [root@dhcp ~]#
> [root@dhcp ~]# grep VLAN /etc/dhcp/dhcpd.conf | wc -l
> 110
> [root@dhcp ~]#
> [root@dhcp ~]#
> [root@dhcp ~]# cat /etc/*release
> CentOS Linux release 7.6.1810 (Core)
> NAME="CentOS Linux"
> VERSION="7 (Core)"
> ID="centos"
> ID_LIKE="rhel fedora"
> VERSION_ID="7"
> PRETTY_NAME="CentOS Linux 7 (Core)"
> ANSI_COLOR="0;31"
> CPE_NAME="cpe:/o:centos:centos:7"
> HOME_URL="https://www.centos.org/"
> BUG_REPORT_URL="https://bugs.centos.org/"
>
> CENTOS_MANTISBT_PROJECT="CentOS-7"
> CENTOS_MANTISBT_PROJECT_VERSION="7"
> REDHAT_SUPPORT_PRODUCT="centos"
> REDHAT_SUPPORT_PRODUCT_VERSION="7"
>
> CentOS Linux release 7.6.1810 (Core)
> CentOS Linux release 7.6.1810 (Core)
> [root@dhcp ~]#
> [root@dhcp ~]#
> [root@dhcp ~]# rpm -qi dhcp
> Name : dhcp
> Epoch : 12
> Version : 4.2.5
> Release : 77.el7.centos
> Architecture: x86_64
> Install Date: Tue 01 Oct 2019 04:14:37 AM +08
> Group : System Environment/Daemons
> Size : 1449595
> License : ISC
> Signature : RSA/SHA256, Fri 23 Aug 2019 05:22:17 AM +08, Key ID
> 24c6a8a7f4a80eb5
> Source RPM : dhcp-4.2.5-77.el7.centos.src.rpm
> Build Date : Fri 09 Aug 2019 07:10:22 AM +08
> Build Host : x86-01.bsys.centos.org
> Relocations : (not relocatable)
> Packager : CentOS BuildSystem <http://bugs.centos.org>
> Vendor : CentOS
> URL : http://isc.org/products/DHCP/
> Summary : Dynamic host configuration protocol software
> Description :
> DHCP (Dynamic Host Configuration Protocol) is a protocol which allows
> individual devices on an IP network to get their own network
> configuration information (IP address, subnetmask, broadcast address,
> etc.) from a DHCP server. The overall purpose of DHCP is to make it
> easier to administer a large network.
>
> To use DHCP on your network, install a DHCP service (or relay agent),
> and on clients run a DHCP client daemon. The dhcp package provides
> the ISC DHCP service and relay agent.
> [root@dhcp ~]#
> [root@dhcp ~]#
> [root@dhcp ~]# sestatus
> SELinux status: enabled
> SELinuxfs mount: /sys/fs/selinux
> SELinux root directory: /etc/selinux
> Loaded policy name: targeted
> Current mode: enforcing
> Mode from config file: enforcing
> Policy MLS status: enabled
> Policy deny_unknown status: allowed
> Max kernel policy version: 31
> [root@dhcp ~]#
> [root@dhcp ~]# mount
> sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
> proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
> devtmpfs on /dev type devtmpfs
> (rw,nosuid,seclabel,size=3974540k,nr_inodes=993635,mode=755)
> securityfs on /sys/kernel/security type securityfs
> (rw,nosuid,nodev,noexec,relatime)
> tmpfs on /dev/shm type tmpfs
> (rw,nosuid,nodev,noexec,seclabel,size=5242880k)
> devpts on /dev/pts type devpts
> (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
> tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
> tmpfs on /sys/fs/cgroup type tmpfs
> (ro,nosuid,nodev,noexec,seclabel,mode=755)
> cgroup on /sys/fs/cgroup/systemd type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
> pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
> cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,cpuacct,cpu)
> cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,net_prio,net_cls)
> cgroup on /sys/fs/cgroup/cpuset type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,cpuset)
> cgroup on /sys/fs/cgroup/freezer type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,freezer)
> cgroup on /sys/fs/cgroup/perf_event type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,perf_event)
> cgroup on /sys/fs/cgroup/hugetlb type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,hugetlb)
> cgroup on /sys/fs/cgroup/memory type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,memory)
> cgroup on /sys/fs/cgroup/pids type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,pids)
> cgroup on /sys/fs/cgroup/devices type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,devices)
> cgroup on /sys/fs/cgroup/blkio type cgroup
> (rw,nosuid,nodev,noexec,relatime,seclabel,blkio)
> configfs on /sys/kernel/config type configfs (rw,relatime)
> /dev/mapper/vg00-lvroot on / type xfs
> (rw,noatime,nodiratime,seclabel,attr2,inode64,noquota)
> selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
> systemd-1 on /proc/sys/fs/binfmt_misc type autofs
> (rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=20052)
> debugfs on /sys/kernel/debug type debugfs (rw,relatime)
> hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel)
> mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
> /dev/sda2 on /boot type xfs
> (rw,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvhome on /home type xfs
> (rw,nodev,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvtmp on /tmp type xfs
> (rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvvar on /var type xfs
> (rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvvartmp on /var/tmp type xfs
> (rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvvarlog on /var/log type xfs
> (rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> /dev/mapper/vg00-lvaudit on /var/log/audit type xfs
> (rw,nosuid,nodev,noexec,noatime,nodiratime,seclabel,attr2,discard,nobarrier,inode64,logbufs=8,noquota)
> tmpfs on /run/user/1000 type tmpfs
> (rw,nosuid,nodev,relatime,seclabel,size=797300k,mode=700,uid=1000,gid=1000)
> [root@dhcp ~]#
> [root@dhcp ~]#
>
>
> logs when "systemctl restart dhcpd" is executed:
> [root@dhcp ~]#
> [root@dhcp ~]# tail -f /var/log/messages
> Nov 10 21:16:56 dhcp polkitd[5349]: Registered Authentication Agent for
> unix-process:5937:354512872 (system bus name :1.30076 [/usr/bin/pkttyagent
> --notify-fd 5 --fallback], object path
> /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
> Nov 10 21:16:56 dhcp systemd: Stopping DHCPv4 Server Daemon...
> Nov 10 21:16:56 dhcp systemd: Stopping DHCPv4 Server Daemon...
> Nov 10 21:16:56 dhcp named[243904]: resolver priming query complete
> Nov 10 21:16:56 dhcp named[243904]: resolver priming query complete
> Nov 10 21:16:56 dhcp systemd: Stopped DHCPv4 Server Daemon.
> Nov 10 21:16:56 dhcp systemd: Stopped DHCPv4 Server Daemon.
> Nov 10 21:16:56 dhcp systemd: Starting DHCPv4 Server Daemon...
> Nov 10 21:16:56 dhcp systemd: Starting DHCPv4 Server Daemon...
> Nov 10 21:16:56 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
> Nov 10 21:16:56 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
> Nov 10 21:16:56 dhcp dhcpd: Copyright 2004-2013 Internet Systems
> Consortium.
> Nov 10 21:16:56 dhcp dhcpd: Copyright 2004-2013 Internet Systems
> Consortium.
> Nov 10 21:16:56 dhcp dhcpd: All rights reserved.
> Nov 10 21:16:56 dhcp dhcpd: All rights reserved.
> Nov 10 21:16:56 dhcp dhcpd: For info, please visit
> https://www.isc.org/software/dhcp/
> Nov 10 21:16:56 dhcp dhcpd: For info, please visit
> https://www.isc.org/software/dhcp/
> Nov 10 21:16:56 dhcp dhcpd: Warning: subnet 192.168.88.0/24 overlaps
> subnet 0.0.0.0/-26
> Nov 10 21:16:56 dhcp dhcpd: Warning: subnet 192.168.88.0/24 overlaps
> subnet 0.0.0.0/-26
> Nov 10 21:17:12 dhcp dhcpd: WARNING: Host declarations are global. They
> are not limited to the scope you declared them in.
> Nov 10 21:17:12 dhcp dhcpd: WARNING: Host declarations are global. They
> are not limited to the scope you declared them in.
> Nov 10 21:17:12 dhcp dhcpd: Not searching LDAP since ldap-server,
> ldap-port and ldap-base-dn were not specified in the config file
> Nov 10 21:17:12 dhcp dhcpd: Not searching LDAP since ldap-server,
> ldap-port and ldap-base-dn were not specified in the config file
> Nov 10 21:17:12 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
> Nov 10 21:17:12 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
> Nov 10 21:17:12 dhcp dhcpd: Copyright 2004-2013 Internet Systems
> Consortium.
> Nov 10 21:17:12 dhcp dhcpd: Copyright 2004-2013 Internet Systems
> Consortium.
> Nov 10 21:17:12 dhcp dhcpd: All rights reserved.
> Nov 10 21:17:12 dhcp dhcpd: All rights reserved.
> Nov 10 21:17:12 dhcp dhcpd: For info, please visit
> https://www.isc.org/software/dhcp/
> Nov 10 21:17:12 dhcp dhcpd: For info, please visit
> https://www.isc.org/software/dhcp/
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 class decls to leases file.
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 class decls to leases file.
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 deleted host decls to leases file.
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 deleted host decls to leases file.
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.
> Nov 10 21:23:12 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.
> Nov 10 21:23:13 dhcp dhcpd: Wrote 60199 leases to leases file.
> Nov 10 21:23:13 dhcp dhcpd: Wrote 60199 leases to leases file.
> Nov 10 21:23:13 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/
> 0.0.0.0/0
> Nov 10 21:23:13 dhcp dhcpd: Sending on LPF/eth0/50:6b:8d:03:a8:b9/
> 0.0.0.0/0
> Nov 10 21:23:13 dhcp dhcpd: Sending on Socket/fallback/fallback-net
> Nov 10 21:23:13 dhcp systemd: Started DHCPv4 Server Daemon.
> Nov 10 21:23:13 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/
> 0.0.0.0/0
> Nov 10 21:23:13 dhcp dhcpd: Sending on LPF/eth0/50:6b:8d:03:a8:b9/
> 0.0.0.0/0
> Nov 10 21:23:13 dhcp dhcpd: Sending on Socket/fallback/fallback-net
> Nov 10 21:23:13 dhcp systemd: Started DHCPv4 Server Daemon.
> _______________________________________________
> dhcp-users mailing list
> [hidden email]
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20191110/daad99b9/attachment.htm>

------------------------------

Subject: Digest Footer

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users

------------------------------

End of dhcp-users Digest, Vol 133, Issue 2
******************************************

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users

Simon Hobson

Re: dhcpd restart takes almost 7 minutes in CentOS7

Please keep the right subject line when quoting from a digest. Also, make sure you trim everything but what you are replying to.

> Cayab, Jefrey E. <[hidden email]> wrote:

> subnet 0.0.0.0 netmask 0.0.0.0 {
> }

Stop right there - what's that doing there ?
You also need to post at least some of the bit where you've written "the rest here are the dhcp scopes", you may assume that it's not important, but it may well be critical to seeing the problem.

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users

Cayab, Jefrey E.

Re: dhcpd restart takes almost 7 minutes in CentOS7

Thank you all for the insights...I will talk to my network team and see how we can optimize the subnets.

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users