2020-04-13 第十二周作业

▲就业班和全程班的小伙伴看这里：（学习老王视频的作业第23-24节）

1、配置chrony服务，实现服务器时间自动同步

1.1 确认chrony服务是否安装

[root@centos7 ~]#rpm -q chrony || yum install -y chrony

chrony-3.2-2.el7.x86_64

1.2 服务器端配置

#vim /etc/chrony.conf

# Please consider joining the pool (http://www.pool.ntp.org/join.html).

server 0.centos.pool.ntp.org iburst

#allow 192.168.0.0/16

allow 0.0.0.0/0    

……

# Serve time even if not synchronized to a time source.

local stratum 10     

:wq

1.3 启动chrony服务并标准时间

#systemctl start chronyd

#systemctl enable chronyd

#chronyc sources -v

1.4 客户端配置

#vim /etc/chrony.conf

server 192.168.253.10 iburst

:wq

#systemctl start chronyd

#systemctl enable chronyd

1.5 客户端校准时间

[root@106 ~]# date +%F_%T

 2020-04-10_09:28:57  

[root@106 ~]# date -s "+2days"  

[root@106 ~]# date +%F_%T  

2020-04-12_09:29:13 

[root@106 ~]# chronyc sources -v

210 Number of sources = 1

  .-- Source mode  '^' = server, '=' = peer, '#' = local clock.

/ .- Source state '*' = current synced, '+' = combined , '-' = not combined,

| /  '?' = unreachable, 'x' = time may be in error, '~' = time too variable.

||                                                .- xxxx [ yyyy ] +/- zzzz

||      Reachability register (octal) -.          |  xxxx = adjusted offset,

||      Log2(Polling interval) --.      |          |  yyyy = measured offset,

||                                \    |          |  zzzz = estimated error.

||                                |    |          \

MS Name/IP address        Stratum Poll Reach LastRx Last sample             

==================================================================

^* 192.168.253.10                3  6  377    42  +397us[ +551us] +/-  41ms

[root@106 ~]# date +%F_%T 

2020-04-12_09:31:40 

2、实现cobbler+pxe自动化装机

一 实验环境：

①　一台DHCP,HTTPD,TFTP服务器(一个网卡，仅主机)

②　一台测试机（一个网卡，仅主机）

③　关闭仅主机的vmware中dhcp服务

二 实验步骤：

2.1、安装软件  

#yum install cobbler  dhcp

#systemctl start cobblerd httpd tftp

2.2、编辑cobbler文件

#cobbler check

#vim /etc/cobbler/settings

default_password_crypted: "$1$RFO.hOYF$g79MJdrxFJMgpggQlhjev/"   

next_server: 192.168.37.17

manage_dhcp: 1

server: 192.168.37.17

#systemctl restart cobblerd

2.3、配置dhcp服务

#vim /etc/cobbler/dhcp.template

subnet 192.168.37.0 netmask 255.255.255.0 {

    option routers            192.168.37.2;

    option domain-name-servers 192.168.37.2;

    option subnet-mask        255.255.255.0;

    range dynamic-bootp        192.168.37.100 192.168.37.254;

｝

#cobbler sync

#systemctl start dhcpd

2.4、下载boot loader 连外网

#cobbler get-loaders

#cobbler sync

2.5、创建yum 源

#cobbler import --path=/misc/cd --name=CentOS7.6-x86_64 --arch=x86_64

#cobbler profile list

#cobbler distro list

2.6、准备ks文件

#cp ks7_mini.cfg /var/lib/cobbler/kickstarts/

#vim /var/lib/cobbler/kickstarts/ks7_mini.cfg

url --url=$tree

#cobbler profile add --name CentOS7.6-x86_64_mini --distro=CentOS7.6-x86_64 --kickstart=/var/lib/cobbler/kickstarts/ks7_mini.cfg

#cobbler profiles remove --name=CentOS7.6-x86_64

2.7、测试安装

2.8、实现web cobbler管理

#yum install cobbler-web  （sohu EPEL）sys

#systemctl restart httpd

2.9 Windows系统中 https://192.168.37.17/cobbler_web 登录