puppet code module class task

1、type name parameters properties

puppet describe --list
puppet describe package -s -m
puppet describe package -m


      resource Service[“puppet"]  

(type)          (name)
service { ‘puppet’:
     (parameter)       (property)
     ensure          => ’stopped’,
     (parameter)       (property)
     provider       => ‘upstart'
}

对于每一个属性，puppet会执行以下的任务
1、测试资源是否已经与目标状态同步
2、如果资源不同步，则会触发同步操作


2、执行测试你的manifest
 
puppet apply site.pp
puppet apply -e 'service { “puppet”: enable => true }'
测试语法不执行
puppet apply site.pp —noop

查看模块路径
puppet module list
查看类型应用
puppet describe <type>

3、变量
class apache {
     $httppackets = ['httpd','php56u' ,'php56u-cli' ,'php56u-mysql' ,'php56u-mbstring' ,'php56u-mcrypt' ,'php56u-xml' ,'php56u-xmlrpc' ,'php56u-intl' ,'php56u-pecl-jsonc' ,'php56u-pecl-memcache' ,'php56u-pecl-memcached','php56u-bcmath' ,'php56u-gd' ,'php56u-opcache' ,'php56u-pecl-redis' ,'mod_ssl']
     package { $httppackets:
          ensure => 'installed',
     }
}

4、依赖
package { 'haproxy':
     ensure => 'installed',
}
->
file { '/etc/haproxy/haproxy.cfg':
     ensure => file,
     owner => 'root',
     group => 'root',
     mode => '0644',
     source => 'puppet:///modules/haproxy/etc/haproxy/haproxy.cfg',
}
->
service {'haproxy':
     ensure => 'running',
}


package { 'haproxy':
     ensure => 'installed',
}
file {'/etc/haproxy/haproxy.cfg':
     ensure => file,
     owner => 'root',
     group => 'root',
     mode => '0644',
     source => 'puppet:///modules/haproxy/etc/haproxy/haproxy.cfg',
     require => Package['haproxy'],
}
service {'haproxy':
     ensure => 'running',
     require => File['/etc/haproxy/haproxy.cfg'],
}

package { 'haproxy':
     ensure => 'installed',
     before => File['/etc/haproxy/haproxy.cfg'],
}
file { '/etc/haproxy/haproxy.cfg':
     ensure => file,
     owner => 'root',
     group => 'root',
     mode => '0644',
     source => 'puppet:///modules/haproxy/etc/haproxy/haproxy.cfg', before => Service['haproxy'],
}
service { 'haproxy':
     ensure => 'running',
}

当依赖执行不成功，后面的依赖的resource都不会执行

service { 'count-logins':
     provider => 'base',
     ensure => 'running',
     enable => true,
     binary => '/usr/local/bin/cnt-logins',
     start => '/usr/local/bin/cnt-logins –daemonize',
     has_status => true,
     has_restart => true,
     subscribe => File['/usr/local/bin/cnt-logins'],
}

不运行时，会重新启动，配置文件属性更改时，也会重新启动



exec { 'echo "test" >> haha.txt':
     cwd => '/tmp',
     creates => '/tmp/haha.txt',   
     path => ['/bin','/usr/bin','/usr/sbin'],
}

path是环境变量，creates判定文件是否存在，返回false则执行exec


资源调用

# A multi-resource reference:
require => File['/etc/apache2/httpd.conf', '/etc/apache2/magic', '/etc/apache2/mime.types'],
# An equivalent multi-resource reference:
$my_files = ['/etc/apache2/httpd.conf', '/etc/apache2/magic', '/etc/apache2/mime.types']
require => File[$my_files]


puppet class结构
Class { ‘apache’:
     default_vhost => true,
}

Class { 'apache::vhost’:
     user.example.com’ => {
          port        => 80,
          docroot  => /var/www/html/,     
}

class apache {
     $httppackets = ['httpd','php56u' ,'php56u-cli' ,'php56u-mysql' ,'php56u-mbstring' ,'php56u-mcrypt' ,'php56u-xml' ,'php56u-xmlrpc' ,'php56u-intl' ,'php56u-pecl-jsonc' ,'php56u-pecl-memcache' ,'php56u-pecl-memcached','php56u-bcmath' ,'php56u-gd' ,'php56u-opcache' ,'php56u-pecl-redis' ,'mod_ssl']
     package { $httppackets:
          ensure => 'installed',
     }
}

为某台机器定义一张清单
node ‘agent_name' {
     $packages = [ 'apache2', 'libapache2-mod-php5', 'libapache2-mod-passenger', ]
     package { $packages:
          ensure => 'installed',
          before => Service['apache2'],
     }
     service { 'apache2':
          ensure => 'running',
          enable => true,
     }
}