CODEWITHSUNDEEP
amazon-ec2ansibleansible-2.x
Deepak Prasad
Deepak Prasad

Reputation: 495

How to pass ec2 variable from one ansible host to another

I want to pass "private_dns_name" of my newly created ec2 instances to some other host in my ansible play book. I have tried using set_fact module to define the variable but no luck! This is ansible playbook entries for host1 

- name: new EC2 instance
   hosts: host1   
  tasks:
    - name: Launch the new EC2 Instance
      ec2:
       aws_access_key: "{{ aws_id }}"
       aws_secret_key: "{{ aws_key }}"
       group_id: "{{ security_group_id }}"
       instance_type: "{{ instance_type }}"
       image: "{{ image }}"
       key_name: "{{ ssh_keyname }}"
       wait: yes
       wait_timeout: 900
       region: "{{ region }}"
       count: 1
       instance_tags:
         Name: Prod-Engineering
      register: ec2
    - name: Register public DNS fact
      set_fact: public_dns= "{{ item.private_dns_name }}"
      with_items: ec2.instances

After defining set_fact i am using below sample code to grab the private_dns_name to my other host2:

 - hosts: host2
   become: yes
   tasks:
    - command: ipa host-add "{{ public_dns}}" --password=xxxxx

but i am getting public_dns variable not defined error, when executing my playbook. How can i retrieve/pass variable from newly created ec2 instance to another other host/ec2 instance?

Upvotes: 0

Views: 923

Answers (1)

Konstantin Suvorov
Konstantin Suvorov

Reputation: 68339

Use ansible magic variables to access other hosts' facts:

- hosts: host2
  become: yes
  tasks:
    - command: ipa host-add "{{ hostvars['host1']['public_dns'] }}" --password=xxxxx

Upvotes: 0

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