通过循环填充字典列表

Question

我想通过循环生成一个字典列表。我发现我们可以使用with_sequence来生成ansible中的整数序列。我得到以下错误：

The offending line appears to be:
- { "dir": "{{ mat_cleaner_input_file_path_flow }}/{{ item }}" }
with_sequence: start=0 end={{ http_range }}
^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes. Always quote template expression brackets when they
start a value. For instance:
with_items:
- {{ foo }}
Should be written as:
with_items:
- "{{ foo }}"

我的config.js2:

{{ cleaner_config | to_nice_yaml(indent=2) }}

我的任务yml:

---
- name: Test dictionaries playbook
hosts: localhost
connection: local
vars:
mat_cleaner_input_file_path_flow: "/var/opt/miq/sftp/edr-flow"
mat_cleaner_input_file_path_http: "/var/opt/miq/sftp/edr-http"
mat_cleaner_input_retention_period: 21600
http_range: 5
cleaner_config:
- { "dir": "{{ mat_cleaner_input_file_path_flow }}/{{ item }}" }
with_sequence: start=0 end={{ http_range }}
tasks:
- name: Set Cleaner Config
template:
src: /home/osboxes/CleanerConfig/cleaner.config.j2
dest: /home/osboxes/CleanerConfig/output
delegate_to: localhost
with_items: cleaner_config

我希望最终输出文件为：

dir: /var/opt/miq/sftp/edr-flow/0
dir: /var/opt/miq/sftp/edr-flow/1
dir: /var/opt/miq/sftp/edr-flow/2

Answer 1

您想要的输出文件的格式是文本。这不是一份清单。你可以通过Jinja创建它，例如

mat_cleaner_input_file_path_flow: "/var/opt/miq/sftp/edr-flow"
http_range: 3
cleaner_config: |
{% for i in range(http_range) %}
{{ mat_cleaner_input_file_path_flow }}/{{ i }}
{% endfor %}

给出

cleaner_config: |-
/var/opt/miq/sftp/edr-flow/0
/var/opt/miq/sftp/edr-flow/1
/var/opt/miq/sftp/edr-flow/2

然后，因为它不是一个列表，所以不必在模板中使用to_nice_yaml。如果要缩进行，请使用缩进，例如

shell> cat cleaner.config.j2
{{ cleaner_config|indent(2) }}

- template:
src: cleaner.config.j2
dest: output

给出

shell> cat output 
/var/opt/miq/sftp/edr-flow/0
/var/opt/miq/sftp/edr-flow/1
/var/opt/miq/sftp/edr-flow/2

---

在正常情况下，您可以简化代码，省略cleaner_config变量，并将Jinja迭代放入模板中，例如

mat_cleaner_input_file_path_flow: "/var/opt/miq/sftp/edr-flow"
http_range: 3

shell> cat cleaner.config.j2
{% for i in range(http_range) %}
{{ mat_cleaner_input_file_path_flow }}/{{ i }}
{% endfor %}

---

如果您想使用列表

mat_cleaner_input_file_path_flow: "/var/opt/miq/sftp/edr-flow"
http_range: 3
cleaner_config_text: |
{% for i in range(http_range) %}
- {{ mat_cleaner_input_file_path_flow }}/{{ i }}
{% endfor %}
cleaner_config: "{{ cleaner_config_text|from_yaml }}

给出

cleaner_config:
- /var/opt/miq/sftp/edr-flow/0
- /var/opt/miq/sftp/edr-flow/1
- /var/opt/miq/sftp/edr-flow/2

现在您需要to_nice_yaml来格式化列表，例如

shell> cat cleaner.config.j2
{{ cleaner_config|to_nice_yaml|indent(2) }}

给出

shell> cat output 
- /var/opt/miq/sftp/edr-flow/0
- /var/opt/miq/sftp/edr-flow/1
- /var/opt/miq/sftp/edr-flow/2