Centos8上搭建dhcp服務器首先我的環(huán)境是在本地的VMware虛擬機，所以先將VMware中的dhcp服務關閉 ??

關閉防火墻，關閉selinux這些必須關閉：?
systemctl stop firewalld ??
setenforce 0?
在centos8上安裝dhcp-server端?
[root@Centos8 ~]#yum install dhcp-server.x86_64?
查看安裝的包和文件?
[root@Centos8 ~]#rpm -ql dhcp-server /etc/NetworkManager/etc/NetworkManager/dispatcher.d/etc/NetworkManager/dispatcher.d/12-dhcpd/etc/dhcp ?????????????????????????????????????????????????????#客戶端/etc/dhcp/dhcpd.conf ???????????????????????????????????#dhcp配置文件（空文件）/etc/dhcp/dhcpd6.conf ?????????????????????????????????#ipv6配置文件/etc/openldap/schema/etc/openldap/schema/dhcp.schema/etc/sysconfig/dhcpd/usr/bin/omshell/usr/lib/.build-id/usr/lib/.build-id/61/usr/lib/.build-id/61/6771248bc042fe96877bd9496ad99a4a4817fc/usr/lib/.build-id/e0/usr/lib/.build-id/e0/17e374d1a55a7254398988114fdd6a0bd63df3/usr/lib/systemd/system/dhcpd.service/usr/lib/systemd/system/dhcpd6.service/usr/sbin/dhcpd ??????????????????????????????????????????????#服務器端/usr/share/doc/dhcp-server/usr/share/doc/dhcp-server/dhcp-lease-list.pl/usr/share/doc/dhcp-server/dhcpd.conf.example ??????????#配置文件范例/usr/share/doc/dhcp-server/dhcpd6.conf.example/usr/share/doc/dhcp-server/ldap/usr/share/doc/dhcp-server/ldap/README.ldap/usr/share/doc/dhcp-server/ldap/dhcp.schema/usr/share/doc/dhcp-server/ldap/dhcpd-conf-to-ldap/usr/share/man/man1/omshell.1.gz/usr/share/man/man5/dhcpd.conf.5.gz/usr/share/man/man5/dhcpd.leases.5.gz/usr/share/man/man8/dhcpd.8.gz/var/lib/dhcpd/var/lib/dhcpd/dhcpd.leases ????????????????????????????#地址分配記錄/var/lib/dhcpd/dhcpd6.leases[root@Centos8 ~]#然后啟動dhcp服務?
[root@Centos8 ~]#systemctl start dhcpd.service?
發(fā)現(xiàn)啟動報錯，是因為dhcp如果沒有配置本網段的dhcp規(guī)則是拒絕啟動的。 ??
查看配置文件：?
[root@Centos8 ~]#vim /etc/dhcp/dhcpd.conf## DHCP Server Configuration file.# ??see /usr/share/doc/dhcp-server/dhcpd.conf.example# ??see dhcpd.conf(5) man page#dhcp默認配置文件是空的，但是它說了看/usr/share/doc/dhcp-server/dhcpd.conf.example這個文件，這個是dhcp配置的一些范例。 ??
[root@Centos8 ~]#cp /usr/share/doc/dhcp-server/dhcpd.conf.example /etc/dhcp/dhcpd.conf?
直接替換配置文件，再次查看：???
[root@Centos8 ~]#vim /etc/dhcp/dhcpd.conf# dhcpd.conf#其中全局語句塊和subnet語句塊均可使配置生效，subnet語句塊優(yōu)先級高于全局語句塊：#全局語句塊:# option definitions common to all supported networks...#指定獲取主機域后綴：option domain-name "wj02.com";#指定DNS，可選option domain-name-servers 180.76.76.76, 119.29.29.29;#ip的租期，單位：秒default-lease-time 86400; ???#默認是600s，客戶端會在租期的一半也就是300s后進行續(xù)租，組曲太短會占用大量的網絡帶寬，建議改時間長一點。這里修改為86400s，一天。#最大租期時間max-lease-time 100000;...log-facility local7;...#subnet配置#指定網段subnet 192.168.38.0 netmask 255.255.255.0 { ???#指定分配的ip范圍，可以跳過一些地址 ???range 192.168.38.10 192.168.38.120; ???range 192.168.38.150 192.168.38.254; ???#指定網關 ???option routers 192.168.38.2;}#為一個mac地址分配一個固定的ip，效果等同于靜態(tài)獲取host test { ?hardware ethernet 00:0c:29:58:4f:12; ?fixed-address 192.168.39.102;}#為00:0c:29:58:4f:12這個mac地址固定的分配192.168.39.120這個地址......dhcp還有語法檢查功能：?
dhcpd -t -cf /etc/dhcp/dhcpd.conf?

當然如果語法不對，啟動也會報錯的，這個其實不重要。???
配置文件修改完畢后，重新啟動dhcp服務?
[root@Centos8 ~]#systemctl start dhcpd?
啟動成功。???
在客戶端獲取ip?
dhclient –d?
因為配置文件里我綁定了mac地址，所以這個服務器應該分配到192.168.38.102這個ip?

至此，dhcp服務器搭建成功。

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