DNS解析综合学习案例
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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.study.com域名解析为192.168.200.113
6、客户机可通过浏览器访问www.study.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
创建三个内存相等的分区
为sdb1,sdb2,sdb3
将这三个分区组成RAID5
[root@ns1 ~]# mdadm -C /dev/md5 -l 5 -n 3 /dev/sdb1 /dev/sdb2 /dev/sdb3 #创建RAID5 ，3块活动硬盘 mdadm: Defaulting to version 1.2 metadata mdadm: array /dev/md5 started.
[root@ns1 ~]# fdisk -l /dev/md5 #查看 磁盘 /dev/md5：21.5 GB, 21458059264 字节，41910272 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理)：512 字节 / 512 字节 I/O 大小(最小/最佳)：524288 字节 / 1048576 字节
构建md5为物理卷 [root@ns1 ~]# pvcreate /dev/md5 Physical volume "/dev/md5" successfully created [root@ns1 ~]# pvdisplay /dev/md5 "/dev/md5" is a new physical volume of "19.98 GiB" --- NEW Physical volume --- PV Name /dev/md5 VG Name PV Size 19.98 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID IdVTjI-oDcr-FmXN-ECI2-myNJ-ssXe-J4b49e 卷组 [root@ns1 ~]# vgcreate myvg /dev/md5 Volume group "myvg" successfully created [root@ns1 ~]# vgdisplay myvg --- Volume group --- VG Name myvg System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 19.98 GiB PE Size 4.00 MiB Total PE 5115 Alloc PE / Size 0 / 0 Free PE / Size 5115 / 19.98 GiB VG UUID 4x4UqB-FbLZ-rWjQ-zJDg-hHZp-b8Gw-PpihfO 逻辑卷 [root@ns1 ~]# lvcreate -L 10G -n mylv myvg Logical volume "mylv" created. [root@ns1 ~]# lvdisplay /dev/myvg/mylv --- Logical volume --- LV Path /dev/myvg/mylv LV Name mylv VG Name myvg LV UUID hUJ15W-JCqC-orEC-8hZy-V9zH-vift-eKeW03 LV Write Access read/write LV Creation host, time ns1.yuan.com, 2019-08-19 09:09:09 +0800 LV Status available # open 0 LV Size 10.00 GiB Current LE 2560 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:2
格式化逻辑卷 [root@ns1 ~]# mkfs.xfs /dev/myvg/mylv log stripe unit (524288 bytes) is too large (maximum is 256KiB) log stripe unit adjusted to 32KiB meta-data=/dev/myvg/mylv isize=256 agcount=16, agsize=163712 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=2619392, imaxpct=25 = sunit=128 swidth=256 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=8 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
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
[root@ns1 ~]# mount /dev/myvg/mylv /usr/local/apache/htdocs/ [root@ns1 ~]# df -Th 文件系统 类型 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root xfs 38G 9.2G 29G 25% / devtmpfs devtmpfs 985M 0 985M 0% /dev tmpfs tmpfs 994M 80K 994M 1% /dev/shm tmpfs tmpfs 994M 8.9M 985M 1% /run tmpfs tmpfs 994M 0 994M 0% /sys/fs/cgroup /dev/sda1 xfs 497M 107M 391M 22% /boot /dev/mapper/myvg-mylv xfs 10G 33M 10G 1% /usr/local/apache/htdocs
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。
[root@ns1 ~]# useradd zhangsan [root@ns1 ~]# vi /etc/fstab //手动添加 /dev/mapper/centos-root / xfs defaults 0 0 UUID=a220eccb-2c0f-485d-bca4-f3659f3326e8 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 /dev/mapper/myvg-mylv /usr/local/apache/htdocs xfs defaults,usrquota 0 0 [root@ns1 ~]# umount /usr/local/apache/htdocs [root@ns1 ~]# mount -a //挂载fstab文件内的磁盘 [root@ns1 ~]# mount |grep /usr/local/apache/htdocs //挂载并查看类型 /dev/mapper/myvg-mylv on /usr/local/apache/htdocs type xfs (rw,relatime,seclabel,attr2,inode64,sunit=1024,swidth=2048,usrquota) [root@ns1 ~]# quotacheck -avug [root@ns1 ~]# quotaon -avug [root@ns1 ~]# setquota -u zhangsan 80000 100000 80 100 /usr/local/apache/htdocs //设置zhangsan用户的磁盘配额 [root@ns1 ~]# quota -uvs zhangsan Disk quotas for user zhangsan (uid 8905): Filesystem space quota limit grace files quota limit grace /dev/mapper/myvg-mylv 0K 80000K 100000K 0 80 100
4、构建主从DNS域名解析环境
5、主从DNS都可将www.study.com域名解析为192.168.200.113
6、主域名服务器要同时担任缓存域名服务器功能
[root@ns1 ~]# yum -y install bind //yum安装bind软件包 [root@ns1 ~]# vim /etc/named.conf //修改配置主配置文件 options { listen-on port 53 { 192.168.50.112; }; 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 { any; }; recursion yes; }; zone "." IN { type hint; file "named.ca"; }; zone "study.com" IN { type master; file "yxh.zheng"; allow-transfer { 192.168.50.111; }; }; zone "50.168.192.in-addr.arpa" IN { type master; file "yxh.fan" allow-transfer { 192.168.50.111; }; }; [root@ns1 ~]# vim /var/named/yxh.zheng #配置区域配置文件 $TTL 1D @ IN SOA study.com. admin.study.com. ( 20190819 3H 15M 1W 1D ) IN NS ns1.study.com. IN NS ns2.study.com. IN MX 10 mail.study.com. ns1 IN A 192.168.50.112 ns2 IN A 192.168.50.111 www IN A 192.168.50.112 [root@ns1 ~]# vim /var/named/yxh.fan #配置反向解析配置文件 $TTL 1D @ IN SOA study.com. admin.yuan.com. ( 20190819 3H 15M 1W 1D ) IN NS ns1.study.com. IN NS ns2.study.com. IN MX 10 mail.yuan.com. 112 IN PTR www.study.com. 112 IN PTR ns1.study.com. 111 IN PTR ns2.study.com. 从服务器： [root@na2 ~]# vim /etc/named.conf #配置从服务器的主配置文件 options { directory "/var/named"; }; zone "study.com" IN { type slave; file "slaves/yxh.zheng"; masters { 192.168.50.112; }; }; zone "50.168.192.in-addr.arpa" IN { type slave; file "slaves/yxh.fan"; masters { 192.168.50.112; }; };
7、客户机可通过浏览器访问www.study.com得到WEB服务器相应内容 //通过客户机测试
8、N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 //客户机测试查看
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