macos - 使用 ec2.py 进行动态库存

Question

我已经设法使用 ansible 即时创建了一个 ec2 实例 -

任务:

- name: Launch Instance
  ec2:
    group_id: "{{ item.group_id }}"
    count: 1
    instance_type: 't2.micro'
    image: '{{ item.image }}'
    wait: true
    region: 'us-east-1'
    aws_access_key: ''
    aws_secret_key: ''
    key_name: "{{ pem }}"
    instance_profile: "{{ profile }}"
  register: ec2
  with_items: ec2_instances

当我运行 ec2.py --list 时，我可以看到 json 响应。
我如何在任何 ansible 剧本中使用它。我想将这些动态创建的主机添加到文件中，我该怎么做？

Answer 1

您可以标记您的实例，然后使用 ansible 使用标记调用您的实例。

首先创建一个目录filter_plugins您的剧本所在的位置，然后将此代码复制到名称为 get_ec2_info.py 的文件中:

from jinja2.utils import soft_unicode

'''
USAGE:
 - debug:
     msg: "{{ ec2.results | get_ec2_info('id') }}"
Some useful ec2 keys:
id
dns_name
public_ip
private_ip
'''

class FilterModule(object):
    def filters(self):
        return {
            'get_ec2_info': get_ec2_info,
        }

def get_ec2_info(list, ec2_key):
    ec2_info = []
    for item in list:
        for ec2 in item['instances']:
            ec2_info.append(ec2[ec2_key])
    return ec2_info

这是您的示例的修改代码:

- name: Launch Instance
  ec2:
    group_id: "{{ item.group_id }}"
    count: 1
    instance_type: 't2.micro'
    image: '{{ item.image }}'
    wait: true
    region: 'us-east-1'
    aws_access_key: ''
    aws_secret_key: ''
    key_name: "{{ pem }}"
    instance_profile: "{{ profile }}"
    instance_tags:
      Name: "myserver"
      Environment: "staging"
      Server_Role: "webserver"
  register: ec2
  with_items: ec2_instances

- name: Create SSH Group to login dynamically to EC2 Instance(s)
  add_host: 
    hostname: "{{ item }}"
    groupname: webserver
  with_items: "{{ ec2.results | get_ec2_info('public_ip') }}"

- name: Add the newly created EC2 instance(s) to the local host group (located at ./inventory/hosts)
  lineinfile:
    dest: "./inventory/hosts" 
    regexp: "{{ item }}" 
    insertafter: "[webserver]" 
    line: "{{ item }}"
  with_items: "{{ ec2.results | get_ec2_info('public_ip') }}"

- name: Wait for SSH to come up on EC2 Instance(s)
  wait_for:
    host: "{{ item }}" 
    port: 22 
    state: started
  with_items: "{{ ec2.results | get_ec2_info('public_ip') }}" 

设置ec2.py库存作为系统上的环境变量(或者您可以通过 -i 参数调用库存):

export ANSIBLE_HOSTS=/your-inventory-path/ec2.py
export EC2_INI_PATH=/your-inventory-path/ec2.ini

之后设置您的 SSH key :

cp /tmp/mykey.pem ~/.ssh/
chmod 600 ~/.ssh/mykey.pem
ssh-agent bash
ssh-add ~/.ssh/mykey.pem

现在您也可以使用标签来调用您的实例(我假设您使用的是 Ubuntu 实例，请相应地更改用户):

ansible -m ping tag_Name_myserver -u ubuntu

或者

ansible -m ping tag_Environment_staging -u ubuntu

或者

ansible -m ping tag_Server_Role_webserver -u ubuntu

或者您可以像这样在您的剧本中使用它:

- hosts: tag_Name_myserver
  become: yes
  remote_user: ubuntu
  roles:
    - your-role-here

希望这会帮助你。如需完整引用，请查看以下位置:

ansible-aws-roles

ansible-ec2