我正在尝试将shell命令的输出注册到项目列表中的item属性。
这发生在循环期间，但似乎没有注册属性。运行任务后，该属性仍显示值none。我想知道我做错了什么？或者有办法实现这个目标吗？
变量：
users:
- username: someguy
description: "Some Guy"
groups: ['sudo', 'guy']
new_id: 6001
old_uid:
old_gid:
user_exists:
password: waffles
- username: somedude
description: "Some Dude"
groups: ['dude']
new_id: 6002
old_uid:
old_gid:
user_exists:
password: toast
任务
---
- name: Check if user exists
shell: /usr/bin/getent passwd {{ item.username }} | /usr/bin/wc -l | tr -d ' '
with_items: "{{ users }}"
register: item.user_exists
- name: Check user current UID
shell: /usr/bin/id -u {{ item.username }}
with_items: "{{ users }}"
register: item.old_uid
when: item.user_exists == 1
- name: Check user current GID
shell: /usr/bin/id -g {{ item.username }}
with_items: "{{ users }}"
register: item.old_gid
when: item.user_exists == 1
输出
TASK: [users | Check if user exists] ******************************************
changed: [bserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
changed: [aserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
changed: [aserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
changed: [bserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
TASK: [users | Check user current UID] ****************************************
skipping: [aserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [aserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [bserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [bserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
TASK: [users | Check user current GID] ****************************************
skipping: [aserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [aserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [bserver] => (item={'username': 'someguy', 'password': 'waffles', 'description': 'Some Guy', 'new_id': 6001, 'groups': ['sudo', 'guy'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
skipping: [bserver] => (item={'username': 'somedude', 'password': 'toast', 'description': 'Some Dude', 'new_id': 6002, 'groups': ['dude'], 'user_exists': None, 'old_uid': None, 'old_gid': None})
答案 0 :(得分：1)
不幸的是，这不是它的工作原理。
您的行register: "{{item.user_exists}}"可能会导致在名为false的变量中注册的结果。
您无法将任务的结果注入任何对象。 register功能只会带一个字符串。
此外register有一个完整的different behavior in a loop。它不是单独注册每个迭代，而是注册一个单独的对象，该对象保存密钥results中所有项的结果。
您仍然可以遍历用户并检查是否存在。但我认为你不会想要成为这样的人。
首先将结果注册到一个变量中，users_checked：
- name: Check if user exists
shell: /usr/bin/getent passwd {{ item.username }} | /usr/bin/wc -l | tr -d ' '
with_items: users
register: users_checked
我建议您使用debug模块，以便始终检查您正在使用的数据结构。
- debug: var=users_checked
这将显示如下：
"var": {
"users_checked": {
"changed": true,
"msg": "All items completed",
"results": [
{
"changed": true,
"cmd": "/usr/bin/getent passwd someguy | /usr/bin/wc -l | tr -d ' '",
"delta": "0:00:00.005415",
"end": "2015-09-08 20:59:33.379516",
"invocation": {
"module_args": "/usr/bin/getent passwd someguy | /usr/bin/wc -l | tr -d ' '",
"module_name": "shell"
},
"item": {
"description": "Some Guy",
"groups": [
"sudo",
"guy"
],
"new_id": 6001,
"old_gid": null,
"old_uid": null,
"password": "waffles",
"user_exists": null,
"username": "someguy"
},
"rc": 0,
"start": "2015-09-08 20:59:33.374101",
"stderr": "",
"stdout": "0",
"stdout_lines": [
"0"
],
"warnings": []
},
{
"changed": true,
"cmd": "/usr/bin/getent passwd somedude | /usr/bin/wc -l | tr -d ' '",
"delta": "0:00:00.006362",
"end": "2015-09-08 20:59:33.530546",
"invocation": {
"module_args": "/usr/bin/getent passwd somedude | /usr/bin/wc -l | tr -d ' '",
"module_name": "shell"
},
"item": {
"description": "Some Dude",
"groups": [
"dude"
],
"new_id": 6002,
"old_gid": null,
"old_uid": null,
"password": "toast",
"user_exists": null,
"username": "somedude"
},
"rc": 0,
"start": "2015-09-08 20:59:33.524184",
"stderr": "",
"stdout": "0",
"stdout_lines": [
"0"
],
"warnings": []
}
]
}
}
因此，结果不仅包含所有项目的实际结果，还包含输入对象。这使您可以循环users_checked.results而不是原始的users列表。
- name: Check user current UID
shell: /usr/bin/id -u {{ item.item.username }}
with_items: users_checked.results
when: item.stdout == 1
但现在它会变得讨厌，因为你想再检查两件事。你可能可以继续这种方法，注册上面的结果，然后使用注册的数据结构作为下一个循环的输入，但你最终会得到一个深度嵌套的对象，最后在{{1}的某个地方有原始对象}。
为避免这种混乱，您可能需要查看creating a custom module来完成此任务。