Ansible 字典和标签 [英] Ansible Dict and Tags

问题描述

我有一个使用 vars: 中声明的字典创建 EC2 的剧本，然后将 IP 注册到一个组中以供以后使用.

I have a playbook creating EC2 by using a dictionary declared in vars: then registering the IPs into a group to be used later on.

字典看起来像这样:

servers:
  serv1:
    name: tag1
    type: t2.small
    region: us-west-1
    image: ami-****
  serv2:
    name: tag2
    type: t2.medium
    region: us-east-1
    image: ami-****
  serv3:
    [...]

我想以最简单的方式将标签应用到这个剧本中，这样我就可以使用标签创建其中的一些.例如，使用 --tags tag1,tag3 运行 playbook 只会启动 EC2 匹配 serv1 和 serv3.

I would like to apply tags to this playbook in the simplest way so I can create just some of them using tags. For example, running the playbook with --tags tag1,tag3 would only start EC2 matching serv1 and serv3.

在字典上应用标签似乎不可能，我想避免做乘法任务，例如:

Applying tags on the dictionary doesn't seem possible and I would like to avoid doing multiplying tasks like:

• 创建 EC2
• 注册信息
• 从以前注册的信息中获取私有 IP
• 将主机添加到组

虽然我已经有了一个工作循环，我想一次创建所有 EC2，但有什么方法可以实现这一点(不依赖 --extra-vars，这需要 key=value)?例如，在运行 EC2 循环之前通过仅保留标记的内容来过滤字典?

While I already have a working loop for the case I want to create all EC2 at once, is there any way to achieve that (without relying on --extra-vars, which would need key=value) ? For example, filtering out the dictionary by keeping only what is tagged before running the EC2 loop ?

推荐答案

我找到了一种方法来满足我的需求，而无需触及其余部分，因此我将其分享，以防其他人可能有类似的需求.我需要根据标签组合字典，所以我的主"字典不会是静态的.

I found a way to match my needs without touching to the rest so I'm sharing it in case other might have a similar need. I needed to combine dictionaries depending on tags, so my "main" dictionary wouldn't be static.

变量变成了:

- serv1:
  - name: tag1
    type: t2.small
    region: us-west-1
    image: ami-****
- serv2:
  - name: tag2
    type: t2.medium
    region: us-east-1
    image: ami-****
- serv3:
 [...]

因此，我没有重复我的任务，而是将 set_fact 与 标签 一起使用，如下所示:

So instead of duplicating my tasks, I used set_fact with tags like this:

- name: Combined dict
# Declaring empty dict
  set_fact:
    servers: []
  tags: ['always']
- name: Add Server 1
  set_fact:
    servers: "{{ servers + serv1 }}"
  tags: ['tag1']
- name: Add Server 2
  set_fact:
    servers: "{{ servers + serv2 }}"
  tags: ['tag2']
[..]

20 行而不是为每个服务器增加多个任务，将变量从字典更改为列表，几个标签，一切都很好:) 现在如果我添加一个新服务器，它只需要几行.

20 lines instead of multiply tasks for each server, change vars from dictionary to lists, a few tags and all good :) Now if I add a new server it will only take a few lines.

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