- DNS需要备份的内容是DNS master数据目录
- master信息如下：
| 单元 | slave VIP | slave IP | 残存的slave IP | master | 备份目录 | 备份 | 访问的coredns |
|---|---|---|---|---|---|---|---|
| wga | 172.21.48.5 | 172.21.48.15 | 172.21.240.15 | 172.21.240.18 | /etc/named | 已备份 | 172.21.48.25;172.21.48.26 |
| 172.21.48.6 | 172.21.48.16 | 172.21.240.16 | |||||
| 172.21.48.7 | 172.21.48.17 | 172.21.240.17 | |||||
| wgb | 172.22.127.5 | 172.22.127.56 | 172.22.127.12 | /etc/named | 已备份 | 172.22.127.25;172.22.127.26 | |
| 172.22.127.6 | 172.22.127.55 | ||||||
| 172.22.127.7 | 172.22.127.57 | ||||||
| ksa | 172.25.80.5 | 172.25.80.37 | 172.25.104.225 | /etc/named | 已备份 | 172.25.182.38;172.25.182.39 | |
| 172.25.80.6 | 172.25.80.38 | ||||||
| 172.25.80.7 | 172.25.80.39 | ||||||
| ksb | 172.24.1.5 | 172.24.1.20 | 172.24.1.32 | /var/named | 已备份 | 172.24.1.33;172.24.1.34 | |
| 172.24.1.6 | 172.24.1.19 | ||||||
| 172.24.1.7 | 172.24.1.12 | ||||||
| qcb | 172.21.46.5 | 172.21.46.21 | 172.21.46.16 | /etc/named | 已备份 | 172.21.48.25;172.21.48.26 | |
| 172.21.46.6 | 172.21.46.22 | ||||||
| 172.21.46.7 | 172.21.46.23 | ||||||
| hs | 172.17.28.5 | 172.17.28.12 | 172.17.28.11 | 172.17.28.15; 172.17.28.16 | |||
| 172.17.28.6 | 172.17.28.13 | ||||||
| 172.17.28.7 | 172.17.28.14 | ||||||
| tcali(yumc0) | 172.28.16.5 | 172.28.19.3 | 172.28.16.69 | /opt/named/ | 172.28.16.163;172.28.16.166 | ||
| 172.28.16.6 | 172.28.19.2 | ||||||
| 172.28.16.7 | 172.28.19.1 |
- 本地备份（备份named数据目录，并保留30天）：
2 2 * * * /usr/sbin/rndc sync && cd /opt/dns-bak && tar -zcvf named`date +"%Y%m%d%H%M%S"`.tar.gz /etc/named
1 1 * * * /usr/bin/find /opt/dns-bak -mtime +30 -name "*.tar.gz" -exec rm -r -f {} \;
- S3备份（账号密码咨询邵腾腾、张书泉）
-
DNS恢复
-
解压备份文件
-
备份原named目录
-
mv 备份named到/etc或/var下
-
重启master dns：systemctl restart named
-
- 测试（172.21.240.18 是恢复的DNS master ip）
Dig @172.21.240.18 域名
