用于检索 instanceProfileArn 的 Puppet Facts

Puppet Facts to retrieve instanceProfileArn

我正在编写一个需要传递实例配置文件 arn 的脚本。我一直在使用 puppet 来使用其 facter 功能检索一些信息。下面是一个在网上找到的 facter 输出的(片段)示例,完整的输出可以在这里找到(https://gist.github.com/cliff-wakefield/b232ef51799908a0264eb7e95af09092)。我想要得到的是 "InstanceProfileArn"

ec2_metadata => {
  ami-id => "ami-34281c57",
  ami-launch-index => "0",
  ami-manifest-path => "(unknown)",
  block-device-mapping => {
    ami => "/dev/sda1",
    root => "/dev/sda1"
  },
  hostname => "ip-10-180-0-40.ap-southeast-2.compute.internal",
  iam => {
    info => "{
  "Code" : "Success",
  "LastUpdated" : "2016-08-28T23:12:36Z",
  "InstanceProfileArn" : "arn:aws:iam::750105279227:instance-profile/AnexPrereqs-AnexIAMInstanceProfile-11O8QJAS4XO7S",
  "InstanceProfileId" : "AIPAI6YKKPRVVX2XD6LCK"
}"

通过运行facter ec2_metadata.iam.info,我得到:

{
      "Code" : "Success",
      "LastUpdated" : "2016-08-28T23:12:36Z",
      "InstanceProfileArn" : "arn:aws:iam::750105279227:instance-profile/AnexPrereqs-AnexIAMInstanceProfile-11O8QJAS4XO7S",
      "InstanceProfileId" : "AIPAI6YKKPRVVX2XD6LCK"
    }

但是,我很难在控制台上打印 "InstanceProfileArn"。

所以,我希望能够实现两件事:

有一个function called parsejson in the Puppet Forge stdlib module。它可用于将包含 JSON 的字符串解析为 Puppet 哈希。使用您的数据的示例:

$ cat Puppetfile
forge "https://forgeapi.puppetlabs.com"
  mod "puppetlabs-stdlib", "4.25.1"
$ r10k puppetfile install
$ cat foo.pp
include stdlib

# should be $info_json = $facts[ec2_metadata][iam][info], but for this example
# we'll use a literal...
$info_json = @(INFO)
{
      "Code" : "Success",
      "LastUpdated" : "2016-08-28T23:12:36Z",
      "InstanceProfileArn" : "arn:aws:iam::750105279227:instance-profile/AnexPrereqs-AnexIAMInstanceProfile-11O8QJAS4XO7S",
      "InstanceProfileId" : "AIPAI6YKKPRVVX2XD6LCK"
}
INFO
$info = parsejson($info_json)
$instance_profile_arn = $info['InstanceProfileArn']
notice($instance_profile_arn)
$ puppet apply --modulepath=modules foo.pp
Notice: Scope(Class[main]): arn:aws:iam::750105279227:instance-profile/AnexPrereqs-AnexIAMInstanceProfile-11O8QJAS4XO7S
[...]