Managing security groups

Security groups are the firewalls that can be used to allow or disallow the flow of traffic. They can be applied to virtual machines. Security groups and virtual machines have a many-to-many relationship. A single security group can be applied to multiple virtual machines and a single virtual machine can have multiple security groups.

How to do it...

1. Let's create a security group as follows:

- name: create a security group for web servers
  os_security_group:
    name: web-sg
    state: present
    description: security group for web servers

The name parameter has to be unique. The description parameter is optional, but we recommend using it to state the purpose of the security group. The preceding...