我遇到了一种情况，我试图从列表中删除该项目。但我没有得到预期的结果。请帮助我我在这里做错了什么？
这是列表：
"get_ec2_id.instances[0].tags": {
"Name": "test-db-system-2",
"aws:cloudformation:logical-id": "DBInstance",
"aws:cloudformation:stack-id": "arn:aws:cloudformation:us-east-1:123456789012:stack/test-db-system-2/0115v0a0-5d44-17e8-a024-503ama4a5qd1",
"aws:cloudformation:stack-name": "test-db-system-2",
"dbsystem:stack": "test-db-system-2",
"dbsystem:type": "db"
}
}
我正在尝试使用以下过滤器从列表中删除所有“aws:cloudformation”标签：
"{{ get_ec2_id.instances[0].tags | reject('search','aws:') | list }}"
我得到以下结果：
ok: [10.52.8.101] => {
"instances_tags": [
"dbsystem:type",
"dbsystem:stack",
"Name"
]
}
但我预计结果如下：
"instances_tags": [
"dbsystem:stack": "test-db-system-2",
"dbsystem:type": "db"
"Name" : "test-db-system-2",
]
}
帮我解决问题。
更通用的解决方案，其中输入是字典，黑名单是列表：
---
- set_fact:
blacklist:
- bad1
- bad2
- set_fact:
output: {}
- name: remove blacklisted items from input
set_fact:
output: "{{ output | combine({item.key: item.value}) }}"
when: item.key not in blacklist
loop: "{{ input | dict2items }}"
get_ec2_id:
instances:
- tags:
Name: test-db-system-2
aws:cloudformation:logical-id: DBInstance
aws:cloudformation:stack-id: arn:aws:cloudformation:us-east-1:123456789012:stack/test-db-system-2/0115v0a0-5d44-17e8-a024-503ama4a5qd1
aws:cloudformation:stack-name: test-db-system-2
dbsystem:stack: test-db-system-2
dbsystem:type: db
更新（社区.通用9.1.0）
问：“删除所有标签
aws:cloudformationA：使用 community.general.remove_keys。声明
instances_tags_target: '^aws:cloudformation.*$'
instances_tags: "{{ get_ec2_id.instances| json_query('[].tags') |
community.general.remove_keys(target=instances_tags_target,
matching_parameter='regex') }}"
给予
instances_tags:
- Name: test-db-system-2
dbsystem:stack: test-db-system-2
dbsystem:type: db
用于测试的完整剧本示例
- hosts: localhost
vars:
get_ec2_id:
instances:
- tags:
Name: test-db-system-2
aws:cloudformation:logical-id: DBInstance
aws:cloudformation:stack-id: arn:aws:cloudformation:us-east-1:123456789012:stack/test-db-system-2/0115v0a0-5d44-17e8-a024-503ama4a5qd1
aws:cloudformation:stack-name: test-db-system-2
dbsystem:stack: test-db-system-2
dbsystem:type: db
instances_tags_target: '^aws:cloudformation.*$'
instances_tags: "{{ get_ec2_id.instances| json_query('[].tags') |
community.general.remove_keys(target=instances_tags_target,
matching_parameter='regex') }}"
tasks:
- debug:
var: instances_tags
起源
使用rejectattr。例如，
dict2: "{{ get_ec2_id.instances.0.tags|
dict2items|
rejectattr('key', 'search', 'aws:')|
items2dict }}"
给予
dict2:
Name: test-db-system-2
dbsystem:stack: test-db-system-2
dbsystem:type: db
然后，将字典转换为字典列表
instances_tags: "{{ dict2|
dict2items|
json_query('[].[[key, value]]')|
map('community.general.dict')|
list }}"
给予
instances_tags:
- Name: test-db-system-2
- dbsystem:stack: test-db-system-2
- dbsystem:type: db
使用这个：
---
- name: dictionary
hosts: localhost
gather_facts: False
connection: local
vars:
get_ec2_id:
instances:
tags:
Name: "test-db-system-2"
"aws:cloudformation:logical-id": "DBInstance"
"aws:cloudformation:stack-id": "arn:aws:cloudformation:us-east-1:123456789012:stack/test-db-system-2/0115v0a0-5d44-17e8-a024-503ama4a5qd1"
"aws:cloudformation:stack-name": "test-db-system-2"
"dbsystem:stack": "test-db-system-2"
"dbsystem:type": "db"
dict2: {}
tasks:
- name: Fact1
set_fact:
dict: "{{ get_ec2_id.instances.tags }}"
- name: Debug1
debug:
var: dict
- name: Fact2
set_fact:
dict2: "{{ dict2 | combine({item.key: item.value}) }}"
when: "{{ item.key.find('aws:') }}"
with_dict: "{{ dict }}"
- name: Debug2
debug:
var: dict2
输出：
TASK [Debug2] ******************************************************************
ok: [localhost] => {
"dict2": {
"Name": "test-db-system-2",
"dbsystem:stack": "test-db-system-2",
"dbsystem:type": "db"
}
}
从ansible 2.5开始，您可以使用
ansible.utils.remove_keys - name: Remove element from dictionary
set_fact:
dict: "{{ dict | ansible.utils.remove_keys('key_name') }}"
来源：