Ansible Lookup格式

Question

我正在尝试用Ansible配置一个Prometheus服务器。为此，我将配置放在一个文件中，通过查找读取该文件：

prometheus_scrape_configs: "
{{ lookup('file', 'files/prometheus/prod/scrapes/basic.yml') }}
"

该文件包含一个标准配置：

- job_name: "prometheus"
  metrics_path: "{{ prometheus_metrics_path }}"
  static_configs:
  - targets:
    - "{{ ansible_fqdn | default(ansible_host) | default('localhost') }}:9090"
 [...]

但是，我得到了如下输出：

+  " ---\n- job_name: \"prometheus\"\n  metrics_path: \"{{ prometheus_metrics_path }}\"\
+    \n  static_configs:\n    - targets:\n        - \"{{ ansible_fqdn | default(ansible_host)\
+    \ | default('localhost') }}:9090\"\n-

打印'\n‘而不是解释。我不确定问题出在哪里。

将查找更改为：

{{ lookup('file', 'files/prometheus/prod/scrapes/basic.yml')|from_yaml }}

生成一个列表：

+ ' [{''job_name'': ''prometheus'', ''metrics_path'': ''{{ prometheus_metrics_path }}'', + ''static_configs'': [{''targets'': ["{{ ansible_fqdn | default(ansible_host) | default(''localhost'') + }}:9090"]}]}, {''job_name'': ''node'', ''honor_labels'': True, ''ec2_sd_configs'': + [{''region'': ''eu-west-1'', ''port'': 9100, ''profile'': ''prometheus-ec2-read-only'', + ''filters'': [{''name'': ''tag:monitoring'', ''values'': [''prometheus'']}]}], ''relabel_configs'': [...]

Answer 1

将YAML文本转换为列表，例如给定简化数据

shell> cat basic.yml 
- key1: val1
  key2: val2
  key3: val3

下面的任务

    - debug:
        var: ps_configs
      vars:
        ps_configs: "{{ lookup('file', 'basic.yml')|from_yaml }}"

给出

  ps_configs:
  - key1: val1
    key2: val2
    key3: val3