[英]Puppet dependency resolution ordering
I have a couple hosts which have Docker containers on them, so I've defined a class called apps::docker
which installs Docker on the hosts: 我有几个主机,上面有Docker容器,因此我定义了一个名为
apps::docker
的类,该类将Docker安装在主机上:
class apps::docker {
include apps::docker::repository, apps::docker::install,
apps::docker::service
Class["Apps::Docker::Repository"] ->
Class["Apps::Docker::Install"] ->
Class["Apps::Docker::Service"]
Package["Docker"] ~> Service["Docker"]
}
class apps::docker::repository {
apt::source { 'docker':
location => "http://get.docker.io/ubuntu",
key => "A88D21E9",
release => "docker",
repos => "main",
include_src => false
}
}
class apps::docker::install {
package { 'docker':
name => "lxc-docker",
ensure => present
}
class apps::docker::service {
service { 'docker':
provider => 'upstart',
enable => true,
ensure => running,
hasrestart => true,
hasstatus => true
}
}
Pretty simple stuff, actually. 实际上,很简单的东西。
The problem is that when I try to define a class which depends on this class, the execution happens out of order and commands fail. 问题是,当我尝试定义一个依赖于该类的类时,执行会乱序进行,命令会失败。 For example, my class
profiles::shiningstar::containers
depends on apps::docker
as defined in profiles::shiningstar
: 例如,我的类
profiles::shiningstar::containers
取决于profiles::shiningstar
定义的apps::docker
profiles::shiningstar
:
class profiles::shiningstar {
include apps::docker
include profiles::shiningstar::containers
Class["Apps::Docker"] -> Class["Profiles::Shiningstar::Containers"]
}
Unfortunately, this doesn't work as seen below: 不幸的是,这不起作用,如下所示:
Error: /Stage[main]/Profiles::Shiningstar::Containers::Puppetmaster::Pull/Docker::Image[rfkrocktk/puppetmaster:1.0.5]/Exec[docker pull rfkrocktk/puppetmaster:1.0.5]: Could not evaluate: Could not find command 'docker'
... (similar errors)
Notice: /Stage[main]/Apps::Docker::Repository/Apt::Source[docker]/Apt::Key[Add key: A88D21E9 from Apt::Source docker]/Apt_key[Add key: A88D21E9 from Apt::Source docker]/ensure: created
It's executing things completely out of order. 它正在完全混乱地执行事情。 What's wrong with my configuration and how can I specify that ALL of the dependencies of
apps::docker
must be satisfied before profiles::shiningstar::containers
? 我的配置出了什么问题?如何指定
profiles::shiningstar::containers
之前必须满足apps::docker
profiles::shiningstar::containers
所有依赖关系?
You probably want to contain the inner classes instead of just including them. 您可能想要包含内部类,而不仅仅是包含它们。
class apps::docker {
contain apps::docker::repository
contain apps::docker::install
contain apps::docker::service
Class['apps::docker::repository']
->
Class['apps::docker::install']
~>
Class['apps::docker::service']
}
Note that it makes sense (in your case at least) to make the ::install
class as a whole notify
all of the ::service
class. 请注意(至少在您的情况下)使
::install
类作为一个整体来notify
所有::service
类是有意义的。 The makes you more flexible in refactoring the respective implementation of those classes. 这样可以使您更加灵活地重构这些类的相应实现。
Edited after first comment - don't try to put chaining arrows between contain
statements. 在第一个评论之后进行编辑 -请勿尝试在
contain
语句之间放置链接箭头。
You should use an anchor, that will ensure that all dependencies are built 您应该使用锚点,以确保所有依赖项均已构建
class apps::docker {
include apps::docker::repository, apps::docker::install,
apps::docker::service
Class["Apps::Docker::Repository"] ->
Class["Apps::Docker::Install"] ->
Class["Apps::Docker::Service"] ->
anchor{"apps::docker":}
Package["Docker"] ~> Service["Docker"]
}
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