作用：自动配置客户端的hosts文件，解决网络内的计算机之间计算机名称解析问题，适用于没有部署DNS服务器的内网环境1、服务端配置puppet模块（1）模块清单123456[root@puppet ~]# tree /etc/puppet/modules/host/。
/etc/puppet/modules/host/├── files├── manifests│ └── init.pp└── templates（2）定义host主类123456789101112
1314151617181920212223[root@puppet ~]# vi /etc/puppet/modules/host/manifests/init.ppclass host { host { puppet.ewin.com: #计算机名称
ensure => present, #基础属性，应用此资源 host_aliases => “puppet”, #计算机别名，可以多个 ip => “10.188.1.73”, #计算机IP地址
} host { zabbix.ewin.com: ensure => present, host_aliases => “zabbix”, ip => “10.188.1.103”,
} host { centostest.ewin.com: ensure => present, host_aliases => “centostest”, ip => “10.188.1.85”,
} host { ywzhou-pc.ewin.com: ensure => present, host_aliases => “ywzhou-pc”, ip => “10.188.1.172”,
}}说明：有多少条解析记录就写多少个host资源，需要注意的是计算机的IP必须固定，使用了DHCP服务的最好在DHCP服务器或路由器上进行保留或绑定；或者手动设定IP，还可以通过puppet来管理客户端的主机名和IP。
（3）定义节点文件，调用模块1234[root@puppet ~]# vi /etc/puppet/manifests/centostest.ppnode “centostest.ewin.com” {
include ntp, yum, puppet, host}（4）应用节点文件12[root@puppet ~]# vi /etc/puppet/manifests/site.ppimport “centostest.pp”
2、测试（1）客户端执行前查看hosts文件12345[root@centostest ~]# cat /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain610.188.1.103 zabbix.ewin.com
10.188.1.73 puppet.ewin.com说明：这是安装客户端时手动设置的（2）客户端执行puppet agent -t后查看日志123456[root@centostest ~]# tailf /var/log/messages。
Nov 11 14:22:39 centostest puppet-agent[20214]: (/Stage[main]/Host/Host[zabbix.ewin.com]/host_aliases) defined host_aliases as zabbix
Nov 11 14:22:39 centostest puppet-agent[20214]: (/Stage[main]/Host/Host[ywzhou-pc.ewin.com]/ensure) created
Nov 11 14:22:39 centostest puppet-agent[20214]: (/Stage[main]/Host/Host[centostest.ewin.com]/ensure) created
Nov 11 14:22:39 centostest puppet-agent[20214]: (/Stage[main]/Host/Host[puppet.ewin.com]/host_aliases) defined host_aliases as puppet
Nov 11 14:22:40 centostest puppet-agent[20214]: Finished catalog run in 1.13 seconds说明：对原有的记录进行修改，增加了别名记录，没有的就创建。
（3）客户端再次查看hosts文件12345678910[root@centostest ~]# cat /etc/hosts# HEADER: This file was autogenerated at Tue Nov 11 14:22:39 +0800 2014
# HEADER: by puppet. While it can still be managed manually, it# HEADER: is definitely not recommended.
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.188.1.103 zabbix.ewin.com zabbix10.188.1.73 puppet.ewin.com puppet10.188.1.172 ywzhou-pc.ewin.com ywzhou-pc
10.188.1.85 centostest.ewin.com centostest结论：可以看到对已有的条目添加了别名，没有的就新增了记录，这样就相当于建立了一个半自动的DNS；但是当计算机太多时最好还是搭建一个内网DNS服务器。
有新的记录就直接写在class host里，通过puppet发布到客户端，所有调用了host类的客户端就自动更新了3、host资源12345678host { resource title: name => #主机名，可以写在标题中。
ensure => #基本参数，present, absent comment => #注释说明 host_aliases => #别名 ip => #IP地址
target => #保住服务信息的文件，大部分系统默认是/etc/hosts}