Book Image

Cloud Security Automation

By : Prashant Priyam
Book Image

Cloud Security Automation

By: Prashant Priyam

Overview of this book

Security issues are still a major concern for all IT organizations. For many enterprises, the move to cloud computing has raised concerns for security, but when applications are architected with focus on security, cloud platforms can be made just as secure as on-premises platforms. Cloud instances can be kept secure by employing security automation that helps make your data meet your organization's security policy. This book starts with the basics of why cloud security is important and how automation can be the most effective way of controlling cloud security. You will then delve deeper into the AWS cloud environment and its security services by dealing with security functions such as Identity and Access Management and will also learn how these services can be automated. Moving forward, you will come across aspects such as cloud storage and data security, automating cloud deployments, and so on. Then, you'll work with OpenStack security modules and learn how private cloud security functions can be automated for better time- and cost-effectiveness. Toward the end of the book, you will gain an understanding of the security compliance requirements for your Cloud. By the end of this book, you will have hands-on experience of automating your cloud security and governance.
Table of Contents (15 chapters)
Title Page
Packt Upsell

Security for instances

In the earlier sections, we studied about different OpenStack components and how to implement security at different levels.

Now, we will see how to ensure security for instances running in OpenStack.

In OpenStack, we have the scheduler function, which helps us to decide which instances will be allocated to which node. This scheduler in OpenStack is known as nova-scheduler, it's basically a component of nova-compute. The nova-scheduler works on a set of filters to choose the right node for the instance. The nova-scheduler allocates the host to the instances on the basis of the following points:

  • Resource allocated to image, the nova-scheduler basically checks the free resource in terms of RAM, CPU, and storage (IO) and then validates the instance requirement to allocate the right host.
  • Image, normally in the cloud environment, we define a tag for hypervisor hosts to allocate on the basis of OS images. In OpenStack too, we use this facility such as image OS and size of the...