如何在虚拟set_fact中使用事实？

Question

我试图避免复制包含的文件中的值。我尝试在包含的文件中添加顶级name、vars和tasks：

---
- name: Install Terraform
  vars:
    terraform_base_url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}"
    terraform_package_file: "terraform_{{ terraform_version }}_linux_amd64.zip"
    terraform_package_url: "{{ terraform_base_url }}/{{ terraform_package_file }}"
    terraform_checksum_url: "{{ terraform_base_url }}/terraform_{{ terraform_version }}_SHA256SUMS"
    terraform_package_path: "/tmp/{{ terraform_package_file }}"

  tasks:
  - name: Install unzip package
  …

这会导致“任务中未检测到任何操作”错误。我还尝试删除tasks标题并将所有任务放在顶层，但结果是相同的。因此，我设置了这样的变量(terraform_version是在剧本中定义的)：

- name: Set Terraform variables
  set_fact:
    terraform_base_url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}"
    terraform_package_file: "terraform_{{ terraform_version }}_linux_amd64.zip"
    terraform_package_url: "{{ terraform_base_url }}/{{ terraform_package_file }}"
    terraform_checksum_url: "{{ terraform_base_url }}/terraform_{{ terraform_version }}_SHA256SUMS"
    terraform_package_path: "/tmp/{{ terraform_package_file }}"

ansible-lint没有抱怨这一点，但是由于某种原因，第二个变量中的terraform_base_url引用中断了：

The task includes an option with an undefined variable. The error was: 'terraform_base_url' is undefined

The error appears to have been in '/vagrant/provisioning/ansible/install-terraform.yml': line 2, column 3, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
---
- name: Set Terraform variables
  ^ here

如果可以为包含的文件设置vars (即文件中所有任务都可用的变量，而不重复它们)，那就更好了。

Answer 1

如果以后不需要中间变量，可以使用var语句：

- name: Set Terraform variables
  set_fact:
    terraform_package_url: "{{ terraform_base_url }}/{{ terraform_package_file }}"
    terraform_checksum_url: "{{ terraform_base_url }}/terraform_{{ terraform_version }}_SHA256SUMS"
    terraform_package_path: "/tmp/{{ terraform_package_file }}"
  vars:
    terraform_base_url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}"
    terraform_package_file: "terraform_{{ terraform_version }}_linux_amd64.zip"

此外，在这里您很可能不需要set_fact。在任何级别(play、task)使用vars部分，或者将它们放在role\vars\main.yaml中作为角色。

Answer 2

看来，这必须分成两部分才能起作用：

- name: Set Terraform variables 1
  set_fact:
    terraform_base_url: "https://releases.hashicorp.com/terraform/{{ terraform_version }}"
    terraform_package_file: "terraform_{{ terraform_version }}_linux_amd64.zip"

- name: Set Terraform variables 2
  set_fact:
    terraform_package_url: "{{ terraform_base_url }}/{{ terraform_package_file }}"
    terraform_checksum_url: "{{ terraform_base_url }}/terraform_{{ terraform_version }}_SHA256SUMS"
    terraform_package_path: "/tmp/{{ terraform_package_file }}"