Please create file group_vars/all, copy-paste content from all.network (parameters shared by all roles) and add parameters from a specific role file group_vars/*.example
A: You can use aws cli to get the variable (https://aws.amazon.com/cli/). Run: aws ec2 describe-subnets and find "AvailabilityZone". with the related "SubnetId": "subnet-XXXXXX"
Q: What's the difference between admins.pub and ssh_ROLENAME.pub?
A: File admins.pub contains keys used to access under root and ubuntu (sudo user).File ssh_ROLENAME.pub provides unpriviledged access to a server. If priviledge separation is not required, just use symlink to admins.pub.
Q: When running ec2.yml/site.yml how to verify that everything has completed as expected? Please provide verification steps.
A: ansible-playbooks must pass all steps w/o errors. This means that everything has completed as expected.
Q: Where can I find IMAGE ID for ubuntu LTS?
A: In diffirent regions, ubuntu has unique IMAGE ID. Please see the required IMAGE ID at: https://cloud-images.ubuntu.com/locator/ec2/
Q: What instance type to use?
A: We recommend type m5.large, but you are free to decide. Please see all instance types at: https://aws.amazon.com/ec2/pricing/on-demand/