我在集群上运行ansible playbook来添加新机器。我希望这个只运行,以添加新机器,认为没有旧机器存在。我可以使用" - 限制"将剧本限制为一台机器。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添加新计算机时跳过群集上的现有计算机?
由于
答案 0 :(得分:2)
你可以使用add_host模块,如果你在playbook中创建一台新机器,你需要抓住公共或私人IP并将其与一个新组联系起来,然后在下一场比赛中使用该组。
看看下一个例子:
- 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