案例实现主从同步
例：如图所示，NS1与NS2互为主辅，域名为sunlinux.com。
NS1配置清单及说明
vim /etc/named.conf
vim /etc/named.rfc1912.zones
vim /var/named/sunlinux.com.zone
检查配置文件有无语法错误
[root@localhost ~]# named-checkzone "sunlinux.com" /var/named/sunlinux.com.zone zone sunlinux.com/IN: loaded serial 20140312 OK [root@localhost ~]# named-checkconf [root@localhost ~]# service named configtest zone localhost.localdomain/IN: loaded serial 0 zone localhost/IN: loaded serial 0 zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/I zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0 zone 0.in-addr.arpa/IN: loaded serial 0 zone sunlinux.com/IN: loaded serial 20140312 [root@localhost ~]#
启动并查看
[root@localhost ~]# service named start Starting named: [ OK ] [root@localhost ~]# ss -tnul | grep ":53" udp UNCONN 0 0 172.16.251.58:53 *:* udp UNCONN 0 0 127.0.0.1:53 *:* tcp LISTEN 0 3 172.16.251.58:53 *:* tcp LISTEN 0 3 127.0.0.1:53 *:* [root@localhost ~]# tail /var/log/messages Mar 12 14:31:40 localhost named[6516]: zone 16.172.in-addr.arpa/IN: loaded serial 20140312 Mar 12 14:31:40 localhost named[6516]: zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0 Mar 12 14:31:40 localhost named[6516]: zone sunlinux.com/IN: loaded serial 20140312 Mar 12 14:31:40 localhost named[6516]: zone localhost.localdomain/IN: loaded serial 0 Mar 12 14:31:40 localhost named[6516]: zone localhost/IN: loaded serial 0 Mar 12 14:31:40 localhost named[6516]: managed-keys-zone ./IN: loaded serial 4 Mar 12 14:31:40 localhost named[6516]: zone 16.172.in-addr.arpa/IN: sending notifies (serial 20140312) Mar 12 14:31:40 localhost named[6516]: zone sunlinux.com/IN: sending notifies (serial 20140312) Mar 12 14:31:40 localhost named[6516]: running [root@localhost ~]#
NS2配置清单及说明
vim /etc/named.conf
options {
// listen-on port 53 { 127.0.0.1; };
// 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";
// allow-query { localhost; };
recursion yes;
allow-transfer {172.16.251.58; }; # NS1 IP
...
}; # 其他与NS1相同vim /etc/named.rfc1912.zones
vim /var/named/16.172.in-addr.arpa.zone # 编辑反解数据库文件
检查配置文件有无语法错误
[root@localhost named]# service named configtest zone localhost.localdomain/IN: loaded serial 0 zone localhost/IN: loaded serial 0 zone 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 0 zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0 zone 0.in-addr.arpa/IN: loaded serial 0 zone 16.172.in-addr.arpa/IN: loaded serial 20140312 [root@localhost named]#
启动并查看
[root@localhost slaves]# service named start Starting named: [ OK ] [root@localhost slaves]# tail /var/log/messages Mar 12 17:38:10 localhost named[3467]: zone sunlinux.com/IN: Transfer started. Mar 12 17:38:10 localhost named[3467]: transfer of 'sunlinux.com/IN' from 172.16.251.58#53: connected using 172.16.251.61#46650 Mar 12 17:38:10 localhost named[3467]: zone sunlinux.com/IN: transferred serial 20140312 Mar 12 17:38:10 localhost named[3467]: transfer of 'sunlinux.com/IN' from 172.16.251.58#53: Transfer completed: 1 messages, 11 records, 276 bytes, 0.002 secs (138000 bytes/sec) Mar 12 17:38:10 localhost named[3467]: zone sunlinux.com/IN: sending notifies (serial 20140312) Mar 12 17:38:10 localhost named[3467]: client 172.16.251.58#39799: transfer of '16.172.in-addr.arpa/IN': AXFR started Mar 12 17:38:10 localhost named[3467]: client 172.16.251.58#39799: transfer of '16.172.in-addr.arpa/IN': AXFR ended Mar 12 17:38:10 localhost named[3467]: client 172.16.251.58#17420: received notify for zone '16.172.in-addr.arpa' Mar 12 17:38:25 localhost named[3467]: client 172.16.251.58#17420: received notify for zone 'sunlinux.com' Mar 12 17:38:25 localhost named[3467]: zone sunlinux.com/IN: notify from 172.16.251.58#17420: zone is up to date
切换回NS1查看日志
[root@localhost slaves]# tail /var/log/messages Mar 12 15:15:15 localhost named[6782]: zone sunlinux.com/IN: sending notifies (serial 20140312) Mar 12 15:15:15 localhost named[6782]: running Mar 12 15:15:15 localhost named[6782]: zone 16.172.in-addr.arpa/IN: Transfer started. Mar 12 15:15:15 localhost named[6782]: transfer of '16.172.in-addr.arpa/IN' from 172.16.251.61#53: connected using 172.16.251.58#39799 Mar 12 15:15:15 localhost named[6782]: client 172.16.251.61#46650: transfer of 'sunlinux.com/IN': AXFR started Mar 12 15:15:15 localhost named[6782]: client 172.16.251.61#46650: transfer of 'sunlinux.com/IN': AXFR ended Mar 12 15:15:15 localhost named[6782]: zone 16.172.in-addr.arpa/IN: transferred serial 20140312 Mar 12 15:15:15 localhost named[6782]: transfer of '16.172.in-addr.arpa/IN' from 172.16.251.61#53: Transfer completed: 1 messages, 8 records, 253 bytes, 0.005 secs (50600 bytes/sec) Mar 12 15:15:15 localhost named[6782]: zone 16.172.in-addr.arpa/IN: sending notifies (serial 20140312) Mar 12 15:15:16 localhost named[6782]: client 172.16.251.61#8308: received notify for zone 'sunlinux.com'
同步数据库成功！
测试
NS1（172.16.251.58）上测试
[root@localhost slaves]# dig -t axfr sunlinux.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 <<>> -t axfr sunlinux.com ;; global options: +cmd ; Transfer failed. [root@localhost slaves]# dig -t axfr sunlinux.com @172.16.251.61 ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 <<>> -t axfr sunlinux.com @172.16.251.61 ;; global options: +cmd sunlinux.com. 600 IN SOA dns.sunlinux.com. dnsadmin.sunlinux.com. 20140312 3600 300 259200 21600 sunlinux.com. 600 IN MX 10 mail.sunlinux.com. sunlinux.com. 600 IN NS ns1.sunlinux.com. sunlinux.com. 600 IN NS ns2.sunlinux.com. ftp.sunlinux.com. 600 IN CNAME www.sunlinux.com. mail.sunlinux.com. 600 IN A 172.16.200.8 ns1.sunlinux.com. 600 IN A 172.16.251.58 ns2.sunlinux.com. 600 IN A 172.16.251.61 pop.sunlinux.com. 600 IN CNAME mail.sunlinux.com. www.sunlinux.com. 600 IN A 172.16.200.6 sunlinux.com. 600 IN SOA dns.sunlinux.com. dnsadmin.sunlinux.com. 20140312 3600 300 259200 21600 ;; Query time: 1 msec ;; SERVER: 172.16.251.61#53(172.16.251.61) ;; WHEN: Wed Mar 12 15:22:56 2014 ;; XFR size: 11 records (messages 1, bytes 276) [root@localhost slaves]#
NS2（172.16.251.61）上测试
[root@localhost slaves]# dig -t axfr sunlinux.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 <<>> -t axfr sunlinux.com ;; global options: +cmd ; Transfer failed. [root@localhost slaves]# dig -t axfr sunlinux.com @172.16.251.58 ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 <<>> -t axfr sunlinux.com @172.16.251.58 ;; global options: +cmd sunlinux.com. 600 IN SOA dns.sunlinux.com. dnsadmin.sunlinux.com. 20140312 3600 300 259200 21600 sunlinux.com. 600 IN NS ns1.sunlinux.com. sunlinux.com. 600 IN NS ns2.sunlinux.com. sunlinux.com. 600 IN MX 10 mail.sunlinux.com. ftp.sunlinux.com. 600 IN CNAME www.sunlinux.com. mail.sunlinux.com. 600 IN A 172.16.200.8 ns1.sunlinux.com. 600 IN A 172.16.251.58 ns2.sunlinux.com. 600 IN A 172.16.251.61 pop.sunlinux.com. 600 IN CNAME mail.sunlinux.com. www.sunlinux.com. 600 IN A 172.16.200.6 sunlinux.com. 600 IN SOA dns.sunlinux.com. dnsadmin.sunlinux.com. 20140312 3600 300 259200 21600 ;; Query time: 1 msec ;; SERVER: 172.16.251.58#53(172.16.251.58) ;; WHEN: Wed Mar 12 17:48:20 2014 ;; XFR size: 11 records (messages 1, bytes 276) [root@localhost slaves]#
