Ansible云信息模块

Question

我不明白如何正确使用 template_parameters 参数 ( http://docs.ansible.com/ansible/cloudformation_module.html )

所以，看起来我可以使用这个参数来覆盖模板中的某些参数。非常简单的配置就是

sandbox_cloudformation.yml

---

- name: Sandbox CloudFormation
  hosts: localhost
  connection: local
  gather_facts: false

  tasks:

   - name: Launch Ansible CloudFormation Stack
     cloudformation:
       aws_access_key: "{{ aws_access_key }}"
       aws_secret_key: "{{ aws_secret_key }}"
       stack_name: "{{ aws_default_cloudformation_stack_name }}"
       state: "present"
       region: "{{ aws_default_region }}"
       disable_rollback: true
       template: "files/cloudformation.yml"
     args:
       template_parameters:
         GroupDescription: "Sandbox Security Group"

cloudformation.yml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: Sandbox Stack
Resources:
  SandboxSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: "DEMO"
      SecurityGroupIngress:
      - IpProtocol: tcp
        FromPort: '80'
        ToPort: '80'
        CidrIp: 0.0.0.0/0
      - IpProtocol: tcp
        FromPort: '22'
        ToPort: '22'
        CidrIp: 0.0.0.0/0

但是我遇到了下一个错误:

fatal: [127.0.0.1]: FAILED! => {"changed": false, "failed": true, "msg": "Parameter values specified for a template which does not require them."}

此外，如果尝试使用，例如我收到此错误

  template_parameters:
      KeyName: "{{ aws_default_keypair }}"
      InstanceType: "{{ aws_default_instance_type }}"

此外，请建议使用 Ansible 的 cloudformation 模块的最佳方法。也许最好的方法是生成云形成模板并在下一步中使用它？就像..

- name: Render Cloud Formation Template
  template: src=cloudformation.yml.j2 dest=rendered_templates/cloudformation.yml

- name: Launch Ansible CloudFormation Stack
         cloudformation:
           template: "rendered_templates/cloudformation.yml"

提前致谢!

Answer 1

您可以使用 template_parameters 将参数传递到 CloudFormation 模板。在模板中，您将使用 Ref 引用参数。对于您的情况:

剧本:

...
args:
  template_parameters:
    GroupDescriptionParam: "Sandbox Security Group"
...

模板:

...
Resources:
  SandboxSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription:
        Ref: GroupDescriptionParam
...

查看 http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group.html#w1ab2c19c12d282c19 有关 AWS SecurityGroup CloudFormation 模板的示例。

我发现创建 Jinja2 模板很方便，而不是在 Ansible cloudformation 模块中使用 template_parameters 参数，并使用 Ansible template 将其转换为 CloudFormation 模板 模块，就像您在问题末尾所建议的那样。使用这种方法，您可以在 cloudformation 模块调用中省略 args 和 template_parameters。

例如:

- name: Generate CloudFormation template
  become: no
  run_once: yes
  local_action: 
    module: template
    src: "mycloudformation.yml.j2"
    dest: "{{ cf_templ_dir }}/mycloudformation.yml"
  tags:
    - cloudformation
    - cf_template

- name: Deploy the CloudFormation stack
  become: no
  run_once: yes
  local_action: 
    module: cloudformation
    stack_name: "{{ cf_stack_name }}"
    state: present
    region: "{{ ec2_default_region }}"
    template: "{{ cf_templ_dir }}/mycloudformation.yml"
  register: cf_result
  tags:
    - cloudformation

- name: Show CloudFormation output
  run_once: yes
  become: no
  debug: var=cf_result
  tags:
    - cloudformation

和 mycloudformation.yml.j2:

---
AWSTemplateFormatVersion: '2010-09-09'
Description: Sandbox Stack
Resources:
  SandboxSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: {{ group_desc_param_defined_somewhere_in_ansible }}
...