puppet成长日记三 Service资源详细介绍及案例分析
一、系统环境
1、puppet服务端Release：RHEL6.4HOSTNAME: puppetserver.rsyslog.orgTCP/IP: 172.16.200.100/24Packages： puppet-server-2.7.21-1.el6.noarchmcollective-client-2.2.4activemq-5.5.02、puppet节点Release: RHEL5.8HOSTNAME: agent1.rsyslog.orgTCP/IP: 172.16.200.101/24Packages:puppet-2.7.21-1.el5mcollective-2.2.4-1.el53、puppet节点Release: RHEL6.4HOSTNAME: agent3.rsyslog.orgTCP/IP: 172.16.200.103/24Packages:puppet-2.7.21-1.el6mcollective-2.2.4-1.el6
二、资源介绍1、实现功能1.1 服务处于运行状态1.2 服务能够在配置文件更改的情况下自动重启2、支持参数ensure => running|stopped 指定服务的目标状态enable => true|false 指定服务是否开机自启动，并非对所有均有效name => "service name",该资源的namevar, 服务的名字,通常就是在/etc/init.d/目录下的名字，默认与title相同hasstatus => true|false, 指出管理脚本是否支持status参数,puppet用status参数来判断服务是否已经在运行了,如果不支持status参数,puppet利用查找运行进程列表里面是否有服务名来判断服务是否在运行. hasrestart => true|false, 指出管理脚本是否支持restart参数,如果不支持,就用stop和start实现restart效果.path => "/etc/rc.d/init.d", 启动脚本的搜索路径,可以用冒号分割多个路径,或者用数组指定provider => base|daemontools|init, 默认为init
三、资源示例1、示例一1.1 实现功能*要求系统启动后，sshd服务自动启动*要求通过系统进程方式查看sshd服务运行状态*要求服务关闭后能够自动重启*要求配置文件被更改后服务能够执行restart动作1.2 配置说明
class ssh::service{service { $ssh::params::ssh_service_name:ensure => running,hasstatus => false,hasrestart => true,enable => true,subscribe => Class[“ssh::config”],}}或class ssh::service{service { $ssh::params::ssh_service_name:ensure => stopped,hasstatus => false,hasrestart => true,enable => true,subscribe => Class[“ssh::config”],}}
1.3 客户端agent3测试
[root@agent3 ~]# puppet agent –testinfo: Retrieving plugininfo: Loading facts in /var/lib/puppet/lib/facter/backup_date.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply1.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply3.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply2.rbinfo: Caching catalog for agent3.rsyslog.orginfo: Applying configuration version ‘1378281102’notice: Finished catalog run in 0.38 seconds[root@agent3 ~]#[root@agent3 ~]# puppet agent –testinfo: Retrieving plugininfo: Loading facts in /var/lib/puppet/lib/facter/backup_date.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply1.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply3.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply2.rbinfo: Caching catalog for agent3.rsyslog.orginfo: Applying configuration version ‘1378280861’notice: /Stage[main]/Ssh::Service/Service[sshd]/ensure: ensure changed ‘running’ to ‘stopped’notice: Finished catalog run in 0.54 seconds
测试结果：ensure => running, hasstatus => false,的情况下服务如果被关闭是起不来的，ensure => stopped, hasstatus => false,的情况下服务如果是运行的可以被关闭建议：写SysV脚本放到/etc/init.d目录下来实现2、示例二2.1 实现功能*要求服务配置文件被改动后，服务能够自动reload而不是自动restart（也可以通过exec资源实现）2.2 配置说明
class ssh::service{service { $ssh::params::ssh_service_name:ensure => running,hasstatus => true,hasrestart => true,enable => true,subscribe => Class[“ssh::config”],#provider => base|daemontools|init,provider => init,path => “/etc/rc.d/init.d”,restart => “/etc/rc.d/init.d/sshd reload”,start => “/etc/rc.d/init.d/sshd start”,stop => “/etc/rc.d/init.d/sshd stop”,}}class ssh::config{file { $ssh::params::ssh_service_config:ensure => present,owner => ‘root’,group => ‘root’,mode => 0640,source => “puppet:///modules/ssh/etc/ssh/sshd_config”,#backup => “.$backup_date.bak”,backup => ‘main’,require => Class[“ssh::install”],notify => Class[“ssh::service”], #等同于class ssh::service中的subscribe}}
2.3 客户端agent3测试可修改agent3端/etc/rc.d/init.d/sshd进行测试
case “$1” instart)start;;stop)stop;;restart)stopstartecho “sshd restart stop-start” >>/tmp/sshd_status;;reload)reloadecho “sshd reload” >>/tmp/sshd_status;;
测试部分：
[root@agent3 ~]# puppet agent –testinfo: Retrieving plugininfo: Loading facts in /var/lib/puppet/lib/facter/backup_date.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply1.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply3.rbinfo: Loading facts in /var/lib/puppet/lib/facter/my_apply2.rbinfo: Caching catalog for agent3.rsyslog.orginfo: Applying configuration version ‘1378279503’notice: /File[/etc/ssh/sshd_config]/content:— /etc/ssh/sshd_config 2013-09-04 15:27:22.177863699 +0800+++ /tmp/puppet-file20130904-19622-yy8g9o-0 2013-09-04 15:29:47.791863671 +0800@@ -5,8 +5,6 @@ Protocol 2 #AddressFamily any-# HostKey for protocol version 1- # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 1h #ServerKeyBits 768info: FileBucket adding {md5}43f5b3f207a1b6fb35e3bd779b83c3f8info: /File[/etc/ssh/sshd_config]: Filebucketed /etc/ssh/sshd_config to main with sum 43f5b3f207a1b6fb35e3bd779b83c3f8notice: /File[/etc/ssh/sshd_config]/content: content changed ‘{md5}43f5b3f207a1b6fb35e3bd779b83c3f8’ to ‘{md5}df197ccd4957217616b62a82b890ed98’info: /File[/etc/ssh/sshd_config]: Scheduling refresh of Class[Ssh::Service]info: Class[Ssh::Config]: Scheduling refresh of Service[sshd]info: Class[Ssh::Service]: Scheduling refresh of Service[sshd]notice: /Service[sshd]: Triggered ‘refresh’ from 2 eventsnotice: Finished catalog run in 0.97 seconds[root@agent3 ~]# cat /tmp/sshd_statussshd reload #可以看到服务是reload而不是restart[root@agent3 ~]#
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本文出自 “小诺的Linux开源技术博客” 博客，，请务必保留此出处
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