Set fact for another group in playbook

[Sergei Antipov]

Hello all.

I can't find a solution for my problem.

I need to create Amazon RDS instance and EC2 instance. And inside EC2 instance I need RDS public ip address.

What I do:

1. - hosts: localhost
code to create rds and register it with rds_database variable
debug tasks here say rds_database.instance.endpoint is exist

code to create ec2 instance and add_hosts inside web group

2. - hosts: web

debug: msg="{{ rds_database.instance.endpoint }}"

fatal: [xxx.xxx.xxx.xxx] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'rds_database' is undefined", 'failed': True}

I tried 

- include: another.yml rds_database="{{ rds_database.instance.endpoint }}", but this variable not evaluated before include.

Should I use fact caching or I do something wrong?

[Dan Vaida]

Use Ansible's dynamic inventory and access the hostname like so:

"{{ hostvars[groups['rds_instance_name_goes_here][0]].ec2__address }}"

Make sure the instance is set to "publicly available" and the security group around it allows such connections.