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我在集群上运行 ansible playbook 以添加新机器。我希望它仅在添加新机器时运行,认为不存在旧机器。我可以使用“--limit”将剧本限制在一台机器上,但在这种情况下,我在创建之前不知道机器名称或 ip。

如何在通过 ansible 添加新机器时跳过集群上的现有机器?

谢谢

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如果您的剧本创建一个需要捕获公共或私有 IP 并将其与新组相关联的新机器,则可以使用 add_host 模块,然后在您的下一个游戏中使用该组。

看下一个例子:

- name: Create a sandbox instance
  hosts: localhost
  gather_facts: False
  vars:
    key_name: my_keypair
    instance_type: m1.small
    security_group: my_securitygroup
    image: my_ami_id
    region: us-east-1
  tasks:
    - name: Launch instance
      ec2:
         key_name: "{{ keypair }}"
         group: "{{ security_group }}"
         instance_type: "{{ instance_type }}"
         image: "{{ image }}"
         wait: true
         region: "{{ region }}"
         vpc_subnet_id: subnet-29e63245
         assign_public_ip: yes
      register: ec2
    - name: Add new instance to host group
      add_host: hostname={{ item.public_ip }} groupname=launched
      with_items: ec2.instances
    - name: Wait for SSH to come up
      wait_for: host={{ item.public_dns_name }} port=22 delay=60 timeout=320 state=started
      with_items: ec2.instances

- name: Configure instance(s)
  hosts: launched
  become: True
  gather_facts: True
  roles:
    - my_awesome_role
    - my_awesome_test
于 2016-03-03T01:58:13.950 回答