Question

我有几个主机上有Docker容器，所以我定义了一个名为apps::docker的类，它在主机上安装了Docker：

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
  }
}

实际上很简单。

问题在于，当我尝试定义依赖于此类的类时，执行不按顺序发生，命令失败。例如，我的班级profiles::shiningstar::containers取决于apps::docker中定义的profiles::shiningstar：

class profiles::shiningstar {
  include apps::docker
  include profiles::shiningstar::containers

  Class["Apps::Docker"] -> Class["Profiles::Shiningstar::Containers"]
}

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

它完全不按顺序执行。我的配置有什么问题，如何指定在apps::docker之前必须满足profiles::shiningstar::containers的所有依赖关系？

Answer 1

您可能希望contain内部类而不是仅仅包含它们。

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']
}

请注意，将::install类作为一个整体notify整个::service类，这是有意义的（至少在您的情况下）。这使您可以更灵活地重构这些类的相应实现。

在第一次评论后编辑 - 请勿尝试在contain语句之间添加链接箭头。

Answer 2

您应该使用锚点，这将确保构建所有依赖项

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"]
}

Puppet依赖解析顺序

2 个答案: