DNS解析综合学习案例
1、用户需把/dev/myvg/mylv逻辑卷以支持磁盘配额的方式挂载到网页目录下
2、在网页目录下创建测试文件index.html，内容为用户名称，通过浏览器访问测试
3、创建用户账户，对LVM配置磁盘配额限制用户磁盘容量为软限制80M；硬限制100M、文件数量软限制为80个；硬限制为100个。
4、构建主从DNS域名解析环境
5、主从DNS都可将www.crushlinux.com域名解析为192.168.200.113
6、客户机可通过浏览器访问www.crushliunx.com得到WEB服务器相应内容
7、主域名服务器要同时担任缓存域名服务器功能
8、客户机通过nslookup域名测试工具可解析到www.jd.com等网站的域名解析结果
[root@localhost ~]# rpm -q gcc gcc-c++ make lynx
未安装软件包 gcc
未安装软件包 gcc-c++
make-3.82-23.el7.x86_64
未安装软件包 lynx
[root@localhost ~]# mount /dev/sr0 /media
mount: /dev/sr0 写保护，将以只读方式挂载
[root@localhost ~]# yum -y install gcc gcc-c++ lynx
[root@localhost ~]# rpm -q gcc gcc-c++ make lynx
gcc-4.8.5-36.el7_6.2.x86_64
gcc-c++-4.8.5-36.el7_6.2.x86_64
make-3.82-23.el7.x86_64
lynx-2.8.8-0.3.dev15.el7.x86_64
[root@localhost ~]# yum -y install lrzsz
[root@localhost ~]# rz -E
rz waiting to receive.
[root@localhost ~]# ls
anaconda-ks.cfg httpd-2.2.17.tar.gz
[root@localhost ~]# tar xf httpd-2.2.17.tar.gz -C /usr/local/
[root@localhost ~]# cd /usr/local/httpd-2.2.17/
[root@localhost httpd-2.2.17]# ./configure --prefix=/usr/local/httpd && make && make install
[root@localhost httpd-2.2.17]# cd /usr/local/httpd/conf
[root@localhost conf]# cp httpd.con{,.bak}
[root@localhost conf]# ls
extra httpd.conf httpd.conf.bak magic mime.types original
[root@localhost conf]# vi httpd.conf
[root@localhost /]# /usr/local/apache/bin/apachectl start
[root@localhost /]# lynx 127.0.0.1
[root@localhost local]# fdisk /dev/sdb
[root@localhost local]# fdisk /dev/sdc
[root@localhost local]# fdisk /dev/sdd
[root@localhost /]# yum -y install mdadm
[root@localhost /]# mdadm -C md5 -l 5 -n 3 /dev/sd[bcd]1
[root@localhost ~]# pvcreate /dev/md5
Physical volume "/dev/md5" successfully created.
[root@localhost ~]# vgcreate myvg /dev/md5
Volume group "myvg" successfully created
[root@localhost ~]# lvcreate -L 35G -n mylv myvg
Logical volume "mylv" created.
[root@localhost ~]# mkfs.ext4 /dev/myvg/mylv
[root@localhost ~]# vi /etc/fstab
/dev/myvg/mylv /usr/local/apache/htdocs ext4 defaults,usrquota,grpquota 0 0
[root@localhost ~]# mount -a
[root@localhost ~]# mount | grep /usr/local/apache/htdocs
/dev/mapper/myvg-mylv on /usr/local/apache/htdocs type ext4(rw,relatime,seclabel,attr2,inode64,sunit=1024,swidth=2048,usrquota,grpquota)
[root@localhost ~]# useradd 2567
[root@localhost ~]# quotacheck -auvg
[root@localhost ~]# quotaon /usr/local/httpd/htdocs/
[root@localhost ~]# edquota -u 2567
[root@localhost ~]# quota -uvs 2567
Disk quotas for user #2567 (uid 2567):
Filesystem space quota limit grace files quota limit grace
/dev/mapper/myvg-mylv 0K 81920K 100M 0 80 100
所有服务器：
iptables -F
systemctl stop firewalld
setenforce 0
配置yum
主服务器：
[root@localhost ~]# yum -y install bind
[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.200.111
nameserver 192.168.200.112
[root@localhost ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.200.111 ns1.crushlinux.com
192.168.200.112 ns2.crushlinux.com
[root@localhost ~]# cat /etc/named.conf
options {
listen-on port 53 { 192.168.200.113; };
directory "/var/named";
allow-query { any; };
recursion yes;
};
zone "crushlinux.com" IN {
type master;
file "crushlinux.zheng";
allow-transfer { 192.168.200.112; };
};
zone "200.168.192.in-addr.arpa" IN {
type master;
file "crushlinux.fan";
allow-transfer { 192.168.200.112; };
};
[root@localhost ~]#
[root@localhost ~]# cat /var/named/crushlinux.zheng
$TTL 86400
@ IN SOA crushlinux.com. admin.crushlinux.com. (
20190817
3H
15M
1W
1D
)
IN NS ns1.crushlinux.com.
IN NS ns2.crushlinux.com.
IN MX 10 mail.crushlinux.com.
ns1 IN A 192.168.200.111
ns2 IN A 192.168.200.112
mail IN A 192.168.200.118
www IN A 192.168.200.114
study IN A 192.168.200.113
* IN A 192.168.200.111
ftp IN CNAME www
[root@localhost ~]# cat /var/named/crushlinux.fan
$TTL 86400
@ IN SOA crushlinux.com. admin.crushlinux.com. (
20190817
3H
15M
1W
1D
)
IN NS ns1.crushlinux.com.
IN NS ns2.crushlinux.com.
IN MX 10 mail.crushlinux.com.
111 IN PTR ns1.crushlinux.com.
112 IN PTR ns2.crushlinux.com.
118 IN PTR mail.crushlinux.com.
114 IN PTR www.crushlinux.com.
113 IN PTR study.crushlinux.com.
111 IN PTR ns1.crushlinux.com.
[root@localhost ~]# chown :named /var/named/crushlinux.*
[root@localhost ~]# named-checkconf -z /etc/named.conf
[root@localhost ~]# named-checkzone crushlinux.com /var/named/crushlinux.zheng
[root@localhost ~]# named-checkzone crushlinux.com /var/named/crushlinux.fan
[root@localhost ~]# systemctl restart named
===============================================================================
从服务器：
[root@localhost ~]# yum -y install bind
[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.200.111
nameserver 192.168.200.112
[root@localhost ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.200.111 ns1.crushlinux.com
192.168.200.112 ns2.crushlinux.com
[root@localhost ~]# cat /etc/named.conf
options {
directory "/var/named";
};
zone "crushlinux.com" IN {
type slave;
file "slaves/crushlinux.zheng";
masters { 192.168.200.111; };
};
zone "200.168.192.in-addr.arpa" IN {
type slave;
file "slaves/crushlinux.fan";
masters { 192.168.200.111; };
};
[root@localhost ~]# systemctl restart named
=================================================================================
客户机：
[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.200.111
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens32
...
DNS1=192.168.200.111