Securing the Cloud - Chapter 1
What are the 5 characteristics of cloud computing
1. On-demand self service (no humans needed to get a resource) 2. Broad network access 3. Rapid elasticity (scale up quickly) 4. Pooling resources (provider combines resources when beneficial) 5. Measured service (pay what you consume)
Function as a Service (FaaS)
A cloud service model that supports server-less software architecture by provisioning runtime containers in which code is executed in a particular programming language. Unlike IaaS and PaaS, FaaS allows you to rent space to run functions independently.
Community Cloud
A cloud that is open only to several specific organizations that have common concerns. Like Colleges & Universities or gaming communities.
Hybrid Cloud
A combination of public and private clouds. May use public for computing workload but private for data sensitive work.
Cloud Computing
A provider is delivering computing to a customer at a remote location over a network
Cloud Governance
All the organization's cloud needs are brought under a centralized location so its more controlled.
Rapid Elasticity and scalability
Automatically and quickly acquire and dispose of resources when needed • Quickly and easily scale based on demand. You can grow and shrink your IT footprint (number of users, number of machines, size of storage) as necessary. Traditionally it can take months to deploy and dispense resources.
Cloud Deployment Models
Different models for deploying cloud services, including private, public, community, and hybrid clouds
Platform as a Service (PaaS)
Grounds between SaaS & IaaS. Vendors provide a platform to run application code but do not have to worry about server configuration or management. Function as a service (FaaS) is a common PaaS capability where the customer creates specialized functions that run either on a schedule or in response to events. Examples of FaaS offerings include AWS Lambda, Microsoft Azure Functions, and Google Cloud Functions.
Broad network access
Services are available over the network by using Web browser or Secure Shell (SSH) connection. Basically no matter where you or the user are you can access the resources in the cloud.
Resource pooling
The ability of a cloud provider to combine resources from multiple physical computers appears to be one combined resource that is available to clients. This characteristic allows the cloud provider to meet various demands from customers while remaining financially viable
Public Cloud
The cloud infrastructure is provisioned for open use by the general public. It may be owned, managed, and operated by a business, academic, or government organization, or some combination of them. These vendors build massive infrastructures and have multiple companies use the work load of the same hardware.
Measured Service
charges for cloud resources are based on the amount of resources actually used (Like most electric and water companies charge).
On-demand Self Service
consumers can obtain computing capabilities such as server time or network storage as needed automatically on their own. There is little to no intervention from the provider.
Software as a Service (SaaS)
delivers an entire application to the customer. They don't have to worry about processing, storage, networking, or any infrastructure details. These services are accessed through a standard web browser. Ex: email delivery, calendering, customer relationship management.
Private Cloud
serves only one customer. Most want the flexibility, scalability, agility, and cost-effectiveness of the cloud but don't want to share computing resources with other organizations. This means no other company will share the hardware/software or software with them.
Infrastructure as a Service (IaaS)
the delivery of computer hardware capability, including the use of servers, networking, and storage, as a service.
