在一个角色中创建set_fact变量,并在另一个角色中使用它们

Question

我有一个复杂的环境,有多个系统的阶段和用户.

阶段是:dev,int等.

每个阶段都有一个应用程序用户,让我们调用用户john.这导致dev和johni的用户johnd为int等等.

为了抽象系统管理,由于阶段中的所有系统都是相同的,我创建了这个数据结构:

users:
  john:
    dev:
      name: "johnd"
    int:
      name: "johni"

现在我有一个角色"collect_user_information",它从LDAP收集所有类型的信息,并在set_fact的帮助下将它们存储在变量中.

- name: Get the userhome out of LDAP
  shell: 'getent passwd {{ users[ user ][ stage ].name }} | cut -d: -f6'
  register: user_home

和set_fact:

- name: set facts for LDAP user
  set_fact:
    "{{user}}":
      name: "{{ users[ user ][ stage ].name }}"
      home: "{{ user_home.stdout }}"

要转储变量,我使用:

- name: debug output for myuser
  debug: var="{{user}}"

调试输出看起来很有意思.

TASK [collect_user_information : debug output for user] *******
ok: [host1] => {
  "john": {
     "home": "/home/johni",-
     "name": "johni"
  }
}

现在我想执行一个角色来创建用户主页.

- { role: create_user_home, user: "john" }

首先,我转储我的变量的条目:

- name: debug role create_user_home output for variable user
  debug: var=user

TASK [create_user_home : debug role create_user_home output for variable user] ***********
ok: [host1] => {
    "user": "john"
}

- name: debug role create_user_home output for variable john
  debug: var={{ user }}

TASK [create_user_home : debug role create_user_home output for variable john] **********
ok: [host1] => {
    "john": {
        "home": "/home/johni",-
        "name": "johni"
    }
}       

现在我想使用这个数据结构.我猜我可以通过引用"{{user.name}}"或"{{user ['name']}}'来访问这些值,但这两种方法都不起作用.

TASK [create_user_home : Create home directories for john] ***********************
fatal: [host1]: FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears to include a variable that is undefined. The error was: 'ansible.parsing.yaml.objects.AnsibleUnicode object' has no attribute 'home'\n\nThe error appears to have been in '/etc/ansible/roles/create_user_home/tasks/main.yml': line 37, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n#-------------------------------------------------------------------------------\n- name: Create home directories for john\n  ^ here\n"}

那么,它是如何工作的？

Answer 1

好吧，我自己找到了解决方案。

首先，我在数据结构中创建一个附加层（myuser）并使用不同的表示法。

- name: set facts for LDAP user
  set_fact:
  myuser: '{ "{{user}}": { "name": "{{ users[ user ][ stage ].name }}", "home": "{{ user_home.stdout }}", "gid": "{{ user_gid.stdout}}", "group": "{{ user_primarygroup.stdout }}" } }'

这会返回一个如下的调试转储：

TASK [collect_user_information : debug output for myuser] ***********
ok: [host1] => {
    "myuser": {
        "john": {
            "home": "/home/johni",
            "name": "johni"
        }
    }
}

现在我可以使用我的数据结构值。请记住“用户”已通过参数传递给角色。

- name: Create home directories for user
  user:
    name: "{{ myuser[ user ].name }}"
    home: "{{ myuser[ user ].home }}"
    shell: "/bin/bash"
  register: "create_user_home"
  tags: [ 'user' ]

希望有帮助。