在通知另一个类中的资源时解决puppet中的循环依赖
在通知另一个类中的资源时解决puppet中的循环依赖
提问于 2015-09-18 12:08:01
我已经写了一个apache类，它安装apache2和配置ssl，然后启动apache服务。我正在编写一个子类，它将配置一个虚拟主机，然后重新启动apache服务。我收到循环依赖错误，因为我试图在添加虚拟主机后通知apache2服务。
我通过将require更改为include解决了这个错误，但这是否意味着apache类中的资源将在apache::no之前运行？
如果不是，那么解决这个依赖错误的方法是什么？
在另一个类中通知资源是一种好的做法吗？
Error: Failed to apply catalog: Found 1 dependency cycle:
(Exec[no] => Service[apache2] => Class[Apache] => Class[Apache::No] => Exec[no])
Try the '--graph' option and opening the resulting '.dot' file in OmniGraffle or GraphVizapache.pp
class apache {
$listen_port="8181"
$no_port="4143"
#file { '/etc/apache2/ports.conf' :
#ensure => present ,
#content => template("apache/ports.conf.erb"),
#require => Package['apache2'],
#notify => Service['apache2'],
#}->
case $facts['osfamily'] {
/^(Debian|Ubuntu)$/: {
file { '/etc/apache2/sites-available/000-default.conf' :
ensure => present ,
content => template("apache/000-default.conf.erb"),
require => Package['apache2'],
notify => Service['apache2'],
noop => true,
}
file { '/etc/apache2/sites-available/default-ssl.conf':
ensure => present ,
content => template("apache/default-ssl.conf.erb"),
require => Package['apache2'],
notify => Service['apache2'],
#noop => true,
}
file { ['/etc','/etc/apache2','/etc/apache2/ssl'] :
ensure => directory,
require => Package['apache2'],
}
package { 'apache2' :
ensure => latest,
notify => Exec['ssl']
} ->
augeas { 'no' :
context => "/files/etc/apache2/ports.conf",
changes => [
"set /files/etc/apache2/sites-available/default-ssl.conf/IfModule/VirtualHost/directive[2]/arg localhost",
"set /files/etc/apache2/sites-available/default-ssl.conf/IfModule/VirtualHost/directive[8]/arg /etc/apache2/ssl/apache.key",
"set /files/etc/apache2/sites-available/default-ssl.conf/IfModule/VirtualHost/directive[7]/arg /etc/apache2/ssl/apache.crt",
"set /files/etc/apache2/ports.conf/IfModule[2]/directive/arg $$no_port",
"set /files/etc/apache2/ports.conf/IfModule[1]/directive/arg $no_port",
"set /files/etc/apache2/ports.conf/directive/arg 8181",
"set /files/etc/apache2/sites-available/000-default.conf/VirtualHost/arg *:8181",
"set /files/etc/apache2/sites-available/default-ssl.conf/IfModule/VirtualHost/arg *:$no_port",
],
require => Package['apache2'],
} ->
service { 'apache2' :
ensure => running
}
package { 'openssl' :
ensure => latest
} ->
exec { 'ssl' :
path => ["/usr/local/sbin","/usr/local/bin","/usr/sbin","/usr/bin","/sbin","/bin"],
command => 'openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/apache2/ssl/apache.key -out /etc/apache2/ssl/apache.crt -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=example.com" ; a2enmod ssl ; a2ensite default-ssl ',
notify => Service['apache2'],
require => Augeas['no'],
refreshonly => true,
}
}
}no.pp
class apache::no {
require ::apache
$listen_port="8181"
file { 'no' :
ensure => present,
path => '/etc/apache2/sites-available/no.conf',
content => template("apache/no.conf.erb"),
notify => Exec['no'],
}
Exec { 'no' :
path => ["/usr/local/sbin","/usr/local/bin","/sbin","/bin","/usr/sbin","/usr/bin","/root/bin"],
command => 'a2ensite no.conf',
notify => Service['apache2'],
refreshonly => true,
}
#Service { 'apache2' :
#ensure => running,
#}
}谢谢
回答 1
Stack Overflow用户
发布于 2015-09-18 13:42:28
你的代码确实不一致。由...
require ::apache..。它坚持将通过类::apache管理的所有内容放在当前类中声明的任何内容之前进行管理，但是...
Exec { 'no' :
# ...
notify => Service['apache2'],
# ...
}..。要求在Service['apache2']之前管理Exec['no']，后者由::apache2类管理。你不能两全其美。
问题产生于混合的抽象层次。在一个地方，你表达了与整个类的关系，而在其他地方，你只表达了与该类的一部分的关系。有两种基本的方法来解决这个问题:要么建立单独的类大小的块来声明单独的关系，要么直接与相关资源(在本例中是Package和Service )建立所有需要的关系。后者是可以接受的，因为您是在相同的模块中工作，但即便如此，前者可能更好。它可能看起来像这样：
class apache {
# declare variables ...
include '::apache::software'
include '::apache::config'
include '::apache::service'
Class['::apache::software'] -> Class['::apache::config']
Class['::apache::config'] ~> Class['::apache::service']
}
# ... class apache::software manages ensuring the package is installed
# ... class apache::config manages the configuration file
# ... class apache::service manages the httpd service
class apache::no {
require 'apache::config'
# ...
Exec { 'no' :
# ...
notify => Class['apache::service']
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/32651685
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