Ansible：尝试一次性在多个区域中创建多个EC2实例

2 回答

• 0

  请记住 Ansible 是一个"plugable"系统，因此它比使用"native"模块找到变通方法更容易，更快 .

  在您的情况下，您可以轻松编写自己的自定义 lookup_plugin ，以搜索正确的 subnet .

  例如：

  • 在主文件夹中创建名为 lookup_plugins 的文件夹 .

  • 创建一个名为 ansible.cfg 的文件（如果没有）

  [默认]
  lookup_plugins = lookup_plugins

  在 lookup_plugins 中创建一个名为 subnets.py 的文件

  import boto.vpc
  class LookupModule(object):
      def __init__(self, basedir=None, **kwargs):
          self.basedir = basedir
          self.plugin_name = 'subnets'
      def run(self, regions, variable=None, **kwargs):
          if not isinstance(regions, list):
              regions = [regions]
          for region in regions:
              return [boto.vpc.connect_to_region(region).get_all_subnets()[0].id]
  

  上面的简单代码将查找给定区域中的子网 . 当然，您可以根据需要自定义它 .

  然后在你的playbook中引用这个插件来找到正确的子网：

  例：

  - hosts: localhost
    gather_facts: no
    tasks:
      - name: Start instance
        debug: msg="Starting instance {{ item.ami }} in {{ item.region }} in {{ item.subnet }}"
        with_items:
          - region: us-west-1
            name: ss12
            ami: ami-b33dccf7  
            subnet: "{{ lookup('subnets', 'us-west-1') }}"
          - region: ap-northeast-1
            name: ss21
            ami: ami-9e5cff9e  
            subnet: "{{ lookup('subnets', 'ap-northeast-1') }}"
          - region: eu-west-1
            name: ss32
            ami: ami-7c4b0a0b 
            subnet: "{{ lookup('subnets', 'ap-northeast-1') }}"
  

  在您的情况下，您可能需要引用正确的 AMI 和关联的 Region .

  回复于 2024-04-28T00:58:57+08:00
• 5

  如果您仍然希望在没有其他模块帮助的情况下执行此操作，则可以计算服务器的模数'％'和子网长度：

  "{{subnets[item.0 | int % subnets | length | int].aws_ec2_subnets}}"
  

  示例代码

  瓦尔：

  subnets:
    - {zone: "us-east-1a", aws_ec2_subnets: 'subnet-123'}
    - {zone: "us-east-1b", aws_ec2_subnets: 'subnet-456'}
    - {zone: "us-east-1d", aws_ec2_subnets: 'subnet-789'}
  
  server_list:
    - server1
    - server2
    - server3
  

  任务：

  - name: Create new ec2 instance
    ec2:
      profile: "{{aws_profile}}"
      key_name: "{{aws_key_name}}"
      group_id: "{{aws_security_group}}"
      instance_type: "{{aws_instance_type}}"
      image: "{{aws_ami}}"
      region: "{{region}}"
      exact_count: "1"
      #instance_profile_name: none
      wait: yes
      wait_timeout: 500
      volumes: "{{volumes}}"
      monitoring: no
      vpc_subnet_id: "{{subnets[item.0 | int % subnets | length | int].aws_ec2_subnets}}"
      assign_public_ip: no
      tenancy: default
      termination_protection: yes
      instance_tags:
        App: "{{app_name}}"
        Environment: "{{environment_type}}"
        Platform: "{{platform_name}}"
        Name: "{{item.1}}"
      count_tag:
        App: "{{app_name}}"
        Environment: "{{environment_type}}"
        Platform: "{{platform_name}}"
        Name: "{{item.1}}"
    register: ec2_new_instance
    with_indexed_items:
      - "{{server_list}}"
  

  回复于 2024-04-28T00:58:57+08:00