puppet管理cron（定时同步时间服务器案例）

用puppet管理cron,可以为N台服务器批量添加cron作业。如定时同步时间服务器的脚本。
1、架构

192.168.0.200(redhat) 主机名master.gangpao.com
192.168.0.201(redhat) 主机名agent01.gangpao.com

2、目录结构

/etc/puppet

|
|-->manifests
| |-->modules.pp
| |-->nodes.pp
| |-->site.pp
|-->modules
|-->cron
|-->manifests
|-->addcron.pp
|-->base.pp
|-->crontabs.pp
|-->init.pp

3、编写脚本
建创目录结构

#mkdir -p /etc/puppet/manifests
#mkdir -p /etc/puppet/modules/cron/manifests
#cd /etc/puppet/modules/cron/manifests

(1)、编写base.pp
功能说明:安装cron包并启动服务

#vim
class cron::base {
package { cron:
name => $operatingsystem ? {   #facter 获取客户端操作系统确定包的名称
ubuntu    => "cron",
debian    => "cron",
redhat    => "vixie-cron",
centos    => "vixie-cron",
},
ensure => present,
}
service { crond:
name => $operatingsystem ? {   #确定启动cron的名称
ubuntu  => "cron",
debian  => "cron",
redhat  => "crond",
centos  => "crond",
},
ensure => running,
enable => true,
pattern => cron,
require => Package["cron"],   #依赖关系
}
}

(2)、编写crontabs.pp
功能说明：安装crontabs包

#vim crontabs.pp
class cron::crontabs {
package { crontabs:
name => $operatingsystem ? {
redhat => "crontabs",
centos => "crontabs",
},
ensure => present,
}
}

(3)、编写addcron.pp
功能说明：添加crontab定时任务（定时同步时间服务器每4个小时同步的第1分钟同步）

#vim addcron.pp
class cron::addcron {
cron { ntpdate:
command => "/usr/sbin/ntpdate time-b.timefreq.bldrdoc.gov",
user => root,
hour => '*/4',
minute => '1'
}
}

(4)、编写init.pp
功能说明:初始化文件

#vim init.php
class cron {
case $operatingsystem {
centos: {
include cron::base
include cron::crontabs
}
redhat: {
include cron::base
include cron::crontabs
include cron::addcron #这三行实现安装添加cron功能
}
debian: { include cron::base }
ubuntu: { include cron::base }
freebsd: { }
}
}

(5)、编写主manifests文件实现让客户端安装cron和添加一条crontab作业。

#cd /etc/puppet/manifests
#vim modules.pp #加载cron模块
import "cron"
#vim nodes.pp #客户端节点管理文件
node 'agent01.gangpao.com'{
include cron
}
#vim site.pp #加载modules.pp 和nodes.pp
import "modules.pp"
import "nodes.pp"

4、执行脚本
服务端

#puppetmasterd -d --no-daemonize -v --trace

客户端

#puppet agent --server master.gangpao.com --test
info: Caching catalog for agent01.gangpao.com
info: Applying configuration version '1310314253'
notice: /Stage[main]/Cron::Addcron/Cron[ntpdate]/minute: minute changed '0' to '1'
notice: /Stage[main]/Cron::Addcron/Cron[ntpdate]/hour: hour changed '*/2' to '*/4'
notice: Finished catalog run in 6.65 seconds

查看

[root@agent01 puppet]# crontab -l
# HEADER: This file was autogenerated at Mon Jul 11 00:10:19 +0800 2011 by puppet.
# HEADER: While it can still be managed manually, it is definitely not recommended.
# HEADER: Note particularly that the comments starting with 'Puppet Name' should
# HEADER: not be deleted, as doing so could cause duplicate cron jobs.
# Puppet Name: ntpdate
1 */4 * * * /usr/sbin/ntpdate time-b.timefreq.bldrdoc.gov

可以看到客户端的crontab改变了。

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