需要这个基本的 ansible 变量解释

Question

我知道这是一个非常基本的问题，但我真的很想得到解释：

repos:
  - name: 'EPEL'
    url: 'http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm'
    key: 'http://ftp.riken.jp/Linux/fedora/epel/RPM-GPG-KEY-EPEL-6'
  - name: 'RPMForge'
    url: 'http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm'
    key: 'http://apt.sw.be/RPM-GPG-KEY.dag.txt'
  - name: 'Remi'
    url: 'http://rpms.famillecollet.com/enterprise/remi-release-6.rpm'
    key: 'http://rpms.famillecollet.com/RPM-GPG-KEY-remi'
  - name: 'Webtatic'
    url: 'http://mirror.webtatic.com/yum/el6/latest.rpm'
    key: 'http://mirror.webtatic.com/yum/RPM-GPG-KEY-webtatic-andy'

比如什么是"repo"，我觉得是榜单吧？但是 "name"、"url" 和 "key" 是什么？为什么只有 "name" 前面有“-”？

提前致谢

Answer 1

如果您从 python dict 和 list:

的角度来看，也许它会有所帮助

$ python -c "

import yaml
import pprint

pp = pprint.PrettyPrinter(indent=3);
x = yaml.load('''repos:
  - name: 'EPEL'
    url: 'http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm'
    key: 'http://ftp.riken.jp/Linux/fedora/epel/RPM-GPG-KEY-EPEL-6'
  - name: 'RPMForge'
    url: 'http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm'
    key: 'http://apt.sw.be/RPM-GPG-KEY.dag.txt'
  - name: 'Remi'
    url: 'http://rpms.famillecollet.com/enterprise/remi-release-6.rpm'
    key: 'http://rpms.famillecollet.com/RPM-GPG-KEY-remi'
  - name: 'Webtatic'
    url: 'http://mirror.webtatic.com/yum/el6/latest.rpm'
    key: 'http://mirror.webtatic.com/yum/RPM-GPG-KEY-webtatic-andy'
''');
pp.pprint( x );"

{  'repos': [  {  'key': 'http://ftp.riken.jp/Linux/fedora/epel/RPM-GPG-KEY-EPEL-6',
                  'name': 'EPEL',
                  'url': 'http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm'},
               {  'key': 'http://apt.sw.be/RPM-GPG-KEY.dag.txt',
                  'name': 'RPMForge',
                  'url': 'http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm'},
               {  'key': 'http://rpms.famillecollet.com/RPM-GPG-KEY-remi',
                  'name': 'Remi',
                  'url': 'http://rpms.famillecollet.com/enterprise/remi-release-6.rpm'},
               {  'key': 'http://mirror.webtatic.com/yum/RPM-GPG-KEY-webtatic-andy',
                  'name': 'Webtatic',
                  'url': 'http://mirror.webtatic.com/yum/el6/latest.rpm'}]}
$

所以：

repos 是 dict
键 repos 的值是 list 的 dicts

why only "name" has the "-" infront of it?

问题无效。这就是 YAML 语法，当你想声明一个 dict 时，你就是这样做的。

O 正如 Marc 所说：ansible YAML Syntax

需要这个基本的 ansible 变量解释

Need this basic ansible variables explaination

ansible

ansible-playbook