防止Ansible 2中出现重复的按键警告 [英] Prevent duplicate key warnings in Ansible 2

问题描述

我在角色中使用了许多YAML锚和引用，以将逻辑保持在一个位置，而不是在多个任务中重复自己.以下是一个非常非常基本的示例.

I use a lot of YAML anchors and references in my roles to keep the logic in a single spot instead of repeating myself in multiple tasks. Following is a very very basic example.

- &sometask
  name: "Some Task"
  some_module: with a lot of parameters
  with_items: list_A

- <<: *sometask
  name: "Some OTHER Task"
  with_items: list_B

_{^{此示例可能不会显示它实际上是如何有用的，但是它是有用的.想象一下，您遍历字典列表，将各个字典中的各种键传递给模块，可能具有非常复杂的"when"，"failed_when"和"changed_when"条件.您只想干燥.}}

因此，我没有对整个任务定义两次，而是对第一个使用锚，并将其所有内容合并到一个新任务中，然后覆盖不同的部分.很好.

So instead of defining the whole task twice, I use an anchor to the first one and merge all its content into a new task, then override the differing pieces. That works fine.

请清楚一点，这是基本的YAML功能，与Ansible本身无关.

Just to be clear, this is basic YAML functionality and has nothing to do with Ansible itself.

以上定义的结果(以及Ansible解析YAML文件时看到的内容)将评估为:

The result of above definition (and what Ansible sees when it parsed the YAML file) would evaluate to:

- name: "Some Task"
  some_module: with a lot of parameters
  with_items: list_A

- name: "Some Task"
  some_module: with a lot of parameters
  with_items: list_A
  name: "Some OTHER Task"
  with_items: list_B

Ansible 2现在具有一项功能，可以在任务中多次定义键时进行投诉.它仍然有效，但是在运行剧本时会产生不必要的噪音:

Ansible 2 now has a feature to complain when keys have been defined multiple times in a task. It still works, but creates unwanted noise when running the playbook:

TASK [Some OTHER Task] *******************************************************
 [WARNING]: While constructing a mapping from /some/file.yml, line 42, column 3, found a duplicate dict key (name).  Using last defined value only.

 [WARNING]: While constructing a mapping from /some/file.yml, line 42, column 3, found a duplicate dict key (with_items).  Using last defined value only.

Ansible配置可防止 deprecation_warnings 和 command_warnings .有没有办法防止这种警告?

Ansible configuration allows to prevent deprecation_warnings and command_warnings. Is there a way to also prevent this kind of warning?

推荐答案

从Ansible 2.9.0开始，可以通过将 ANSIBLE_DUPLICATE_YAML_DICT_KEY 环境变量设置为 ignore 来实现..此变量的其他可能值是 warn (它是默认值并保留原始行为)和 error (这会使剧本执行失败).

As of Ansible 2.9.0, this can be achieved by setting the ANSIBLE_DUPLICATE_YAML_DICT_KEY environment variable to ignore. Other possible values for this variable are warn, which is the default and preserves the original behaviour, and error, which makes the playbook execution fail.

有关实现的详细信息，请参见此拉取请求.

See this pull request for details about the implementation.

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