在 Ansible 中使用 with_dict 循环注册变量 [英] Loop through a registered variable with with_dict in Ansible
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问题描述
如何引用已注册值的字典元素.
How to refer to elements of dictionary of a registered value.
我的 Ansible 手册如下所示:
My Ansible playbook look like this :
- command: echo {{ item }}
with_dict:
- foo
- bar
- baz
register: echos
注册变量echos"将是一个字典:
Registered variable "echos" will be a dictionary :
{
"changed": true,
"msg": "All items completed",
"results": [
{
"changed": true,
"cmd": [
"echo",
"foo"
],
"delta": "0:00:00.002780",
"end": "2014-06-08 16:57:52.843478",
"invocation": {
"module_args": "echo foo",
"module_name": "command"
},
"item": "foo",
"rc": 0,
"start": "2014-06-08 16:57:52.840698",
"stderr": "",
"stdout": "foo"
},
{
"changed": true,
"cmd": [
"echo",
"bar"
],
"delta": "0:00:00.002736",
"end": "2014-06-08 16:57:52.911243",
"invocation": {
"module_args": "echo bar",
"module_name": "command"
},
"item": "bar",
"rc": 0,
"start": "2014-06-08 16:57:52.908507",
"stderr": "",
"stdout": "bar"
},
{
"changed": true,
"cmd": [
"echo",
"baz"
],
"delta": "0:00:00.003050",
"end": "2014-06-08 16:57:52.979928",
"invocation": {
"module_args": "echo baz",
"module_name": "command"
},
"item": "baz",
"rc": 0,
"start": "2014-06-08 16:57:52.976878",
"stderr": "",
"stdout": "baz"
}
]
}
现在,如果我想引用 echos 字典的foo"字典元素的已更改"字段,我该怎么做??
Now if i want to refer to "changed" field of "foo" dictionary element of echos dictionary , How do i do that ??
推荐答案
首先,您的示例存在缺陷:with_dict
无法遍历列表.
First of all, your example is flawed: with_dict
can't iterate over list.
但一般的做法如下:
---
- hosts: localhost
gather_facts: no
tasks:
- command: echo {{ item }}
with_items:
- foo
- bar
- baz
register: echos
# Iterate all results
- debug: msg='name {{ item.item }}, changed {{ item.changed }}'
with_items: '{{ echos.results }}'
# Select 'changed' attribute from 'foo' element
- debug: msg='foo changed? {{ echos.results | selectattr("item","equalto","foo") | map(attribute="changed") | first }}'
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