Centos7 下配置主从dns(bind)

oLeiShen

2019-11-28

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dns 主备搭建

环境说明

系统:CentOS 7.6 x86_64

主master：10.0.0.182

备slave：10.0.0.115

1、安装主要包，在主备机器都执行如下命令

yum install bind bind-utils bind-chroot -y

2、进行配置配置

主master上配置

/etc/named.conf

//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
// See the BIND Administrator‘s Reference Manual (ARM) for details about the
// configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html

options {
        listen-on port 53 { any; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     { any; };
        notify yes;
        recursion yes;
        dnssec-enable yes;
        dnssec-validation yes;
        bindkeys-file "/etc/named/named.root.key";
        managed-keys-directory "/var/named/dynamic";
        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
        masterfile-format text ;
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

zone "." IN {
        type hint;
        file "named.ca";
};

#include "/etc/named/named.rfc1912.zones";
include "/etc/named/named.sx.zones";
include "/etc/named/named.root.key";

/etc/named/named.sx.zones，由于该文件是自定义的文件，需要手动更改下文件权限，

chown root.named /etc/named/named.sx.zones

zone "sx" IN {
        type master;
        file "zones/sx.zone";
        allow-update { 10.0.0.115; };
        also-notify { 10.0.0.115; };
        allow-transfer { 10.0.0.115; };
};
zone "sx.com" IN {
        type master;
        file "zones/sx.com.zone";
        allow-update { 10.0.0.115; };
        also-notify { 10.0.0.115; };
        allow-transfer { 10.0.0.115; };
};

在/var/named/ 下创建zones目录，并更改用户属主和属组

mkdir /var/named/zones

chown named.named /var/named/zones

cat /var/named/zones/sx.zone

$TTL 600
@       IN SOA  @ rname.invalid. (
                                        2       ; serial
                                        1M      ; refresh
                                        1M      ; retry
                                        1M      ; expire
                                        3H )    ; minimum
@       NS      ns1
@       NS      ns2
ns1     A       10.0.0.182
ns2     A       10.0.0.115
*     A       10.0.0.184

从slave上的配置

cat /etc/named.conf

//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
// See the BIND Administrator‘s Reference Manual (ARM) for details about the
// configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html

options {
        listen-on port 53 { any; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     { any; };
        recursion yes;
        dnssec-enable yes;
        dnssec-validation yes;
        bindkeys-file "/etc/named/named.root.key";
        managed-keys-directory "/var/named/dynamic";
        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
        masterfile-format text ;
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

zone "." IN {
        type hint;
        file "named.ca";
};

#include "/etc/named/named.rfc1912.zones";
include "/etc/named/named.sx.zones";
include "/etc/named/named.root.key";

cat /etc/named/named.sx.zones

注意自定义文件属组和属主

zone "sx" IN {
        type slave;
        masters { 10.0.0.182; };
        file "slaves/sx.zone";
};
zone "sx.com" IN {
        type slave;
        masters { 10.0.0.182; };
        file "slaves/sx.com.zone";
};