工具
dnf install bind -y #软件即可完成安装
[root@Client ~]# dnf install bind-utils -y #安装测试工具 没有的话用
[root@client ~]# getent hosts image.yao.org
[root@client ~]# cat /etc/resolv.conf #查看域名是否配置成功
systemctl restart named
named-checkconf #主配置文件
[root@mysql-node4 /]# named-checkconf /etc/named.rfc1912.zones #区域管理配置文件
named-checkzone yao.org /var/named/yao.org.zone #正向解析文件
[root@mysql-node3 named]# named-checkzone 172.25.254.arpa /var/named/172.25.254.arpa
/etc/named.conf ：#该反向解析
/etc/named.conf ：该文件是主配置文件
- /etc/named.rfc1912.zones ：这里区域管理配置文件
- /var/named : 该目录存放着详细的域名解析配置文件正向解析
[root@mysql-node3 named]#systemctl start named
[root@mysql-node3 named]# vim /etc/named.conf
options{
listen-on port 53 { 172.25.254.30; };服务器
...
allow-query { 172.25.254.0/24; };
}
[root@Server ~]# named-checkconf
[root@mysql-node3 named]# vim /etc/named.rfc1912.zones
...
zone "yao.org" IN {
type master;
file "yao.org.zone" # 文件的绝对路径 /var/named/yao.org.zone
};
...
[root@mysql-node3 /]# named-checkconf /etc/named.rfc1912.zones
[root@mysql-node3 named]# cd /var/named
[root@mysql-node3 named]# cp -p named.localhost yao.org.zone # 通过复制模创建区域解析文件
[root@mysql-node3 named]# vim heroliu.org.zone
...
$TTL 1D # 域名存活时间是一天
@ IN SOA dns.yao.org. mail.admin.yao. (
2025042001 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.yao.org.
dns A 172.25.254.30
image A 172.25.254.31
www A 172.25.254.32
...
systemctl start/restart named
[root@Client ~]# nmcli connection modify ens160 ipv4.dns 172.25.254.30
[root@Client ~]# nmcli connection reload
[root@Client ~]# nmcli connection up ens160
[root@client ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 172.25.254.30
[root@mysql-node3 named]#named-checkzone yao.org /var/named/yao.org.zone
systemctl start/restart named
[root@Client ~]# nslookup image.heroliu.org
Server: 172.25.254.100
Address: 172.25.254.100#53
Name: image.heroliu.org
Address: 172.25.254.101
[root@Client ~]# nslookup www.heroliu.org
[root@Client ~]# nslookup dns.heroliu.org反向解析
如果说 正向解析：通过 域名 -> ip
那么 反向解析: 通过 ip -> 域名
[root@mysql-node3 ~]#vim /etc/named.conf
..
options{
listen-on port 53 { 172.25.254.30; };
...
allow-query { 172.25.254.0/24; };
}
[root@Server ~]# named-checkconf
[root@mysql-node3named]# cd /var/named
[root@mysql-node3named]# cp -p named.loopback 172.25.254.arpa
[root@mysql-node3 named]# vim 172.25.254.arpa
$TTL 1D
@ IN SOA dns.yao.org. rname.invalid. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.yao.org.
dns.yao.org. A 172.25.254.30
31 PTR image.yao.org.
32 PTR www.yao.org.
30 PTR dns.yao.org.
[root@mysql-node3 named]# named-checkzone 254.25.172.in-addr.arpa 172.25.254.arpa
systemctl restart named
[root@Client ~]# getent hosts 172.25.254.31
101.254.25.31.in-addr.arpa name = image.yao.org.
[root@Client ~]# getent hosts 172.25.254.32
[root@Client ~]# getent hosts 172.25.254.33
systemctl restart named主从DNS服务
主服务器挂了以后，就可以从从服务器获取服务
[root@mysql-node4 / named]# nmcli connection modify ens160 ipv4.dns 172.25.254.30
[root@mysql-node4 / named]# nmcli connection reload
[root@mysql-node4 / named]# nmcli connection up ens160
[root@Server ~]# vim /etc/named.rfc1912.zones
zone "heroliu.org" IN {
type master;
file "heroliu.org.zone";
allow-transfer{172.25.254.40;};
};
zone "254.25.172.in-addr.arpa" IN {
type master;
file "172.25.254.arpa";
allow-transfer{172.25.254.40;};
};
[root@mysql-node3 /]# named-checkconf /etc/named.rfc1912.zones
# 正向数据解析配置文件中
[root@Server named]# vim heroliu.org.zone
...
NS dns.yao.org.
NS slave.yao.org.# 新增
dns A 172.25.254.30
slave A 172.25.254.40# 新增
...
# 反向数据解析配置文件中
[root@Server named]# vim 172.25.254.arpa
...
$TTL 1D
...
NS dns.yao.org.
NS slave.yao.org.
31 PTR image.yao.org.
32 PTR www.yao.org.
30 PTR dns.yao.org.
...从服务器
[root@Client ~]# dnf install bind -y
[root@Client ~]# nmcli connection modify ens160 ipv4.dns 172.25.254.40
[root@Client ~]# nmcli connection reload
[root@Client ~]# nmcli connection up ens160
连接已成功激活（D-Bus 活动路径：/org/freedesktop/NetworkManager/ActiveConnection/8）
[root@Client ~]# vim /etc/named.conf
11 listen-on port 53 { 172.25.254.40; };
19 allow-query { 172.25.254.0/24; };
[root@Client ~]# vim /etc/named.rfc1912.zones
zone "yao.org" IN {
type slave;
file "slaves/yao.org.zone";
masters {172.25.254.30;};
};
zone "254.25.172.in-addr.arpa" IN {
type slave;
file "slaves/172.25.254.arpa";
masters {172.25.254.30;};
};
[root@mysql-node4 /]# systemctl restart named
关掉主服务器。看一下从服务器能否使用
[root@client ~]# getent hosts www.yao.org
172.25.254.33 www.yao.org
#可以看一下当我主服务器关掉是，从服务器是否可以使用
[root@mysql-node4 /]# ls /var/named/slaves/
172.25.254.arpa yao.org.zone