IaaS, or Infrastructure as a Service, provides the most basic cloud computing infrastructure such as virtual servers, virtual networks, and other resources. IaaS is similar to the typical IT department infrastructure, with the only difference that the equipment is located in the data center of the cloud service provider. The ability to quickly adjust the performance of resources based on current needs makes IaaS the most operationally flexible.
SaaS, or Software as a Service, is a ready‑to‑go solution that is launched and managed by the cloud service provider. The application can be accessed via browser, API, or client program on the user’s device. Most of the services, such as enterprise databases, CRM, corporate mail, anti‑DDoS, and Kubernetes, are only available for a fee. However, users can take advantage of such features as automatic application updates and DLP security.
PaaS, or Platform as a Service, provides a user with a framework in which they can develop, manage, and deliver applications without having to deal with infrastructure elements such as virtual machines and networks. Instead, all required servers and environments can be chosen from a list of available resources. With a ready‑to‑use solution, you can focus on what matters most: deploying and managing applications. PaaS solutions are usually built on top of containerization technology.
Platform Cloud Services
Let’s now take a look at a few other PaaS‑based services that utilize cloud computing to facilitate the development process and simplify infrastructure operation.
Serverless is a cloud computing model that allows users to build and run applications or focus on more application business logic without having to manage servers. The provider is in charge of all cloud infrastructure management tasks. How does it work? Each request is assigned to a container or virtual machine, which will be deleted once the operation is completed.
FaaS, or Function as a Service, is an event‑driven computing paradigm in which a function, which is a piece of application code, is only executed in response to a specific event, e.g. an HTML request. The resources for launching applications are provided and handled by a cloud service, making it easier for developers to create, test, and release microservices at scale.
DBaaS, or Database as a Service, provides users with on‑demand access to any type of database without having to deal with the management and support of underlying technologies. This approach significantly reduces the workload of the IT department, allowing for faster project launches.
KaaS, or Kubernetes as a Service, offers users a conveniently managed container orchestration system, eliminating the need for maintenance and administration of the IT infrastructure. Cloud Kubernetes autoscaling ensures that applications are available to clients even during peak times.
In IaC, or Infrastructure as a Code, configuration files are used to manage the IT environment in the same way the program source code is used to build software. IaC is a key DevOps practice that allows for the automation of infrastructure and configuration management.
Types of clouds
There are five main types of clouds: public, private, multi‑cloud, hybrid, and community cloud. Each type addresses a different set of issues and organizational requirements.
Public cloud. In simple terms, a public cloud is one or more data centers managed by a cloud provider. It ensures cloud operation and makes all data center services, from SaaS applications like Microsoft Office 365 to virtual machines, available via the Internet. Services are provided on a subscription or pay‑per‑use basis. Because of their elasticity and scalability, more and more businesses are starting to utilize cloud services for their infrastructure needs. The cloud service provider ensures that all systems in the data center run efficiently and that users have quick access to their data and applications.
Private cloud. A private cloud is an environment in which all infrastructure and computing resources are owned and managed by a single organization (as opposed to public cloud where space is allocated in multiple data centers). In addition to the standard advantages of cloud computing, a private cloud also offers granular control over user access, enhanced security, and flexible resource allocation.
Hybrid cloud. A hybrid cloud is a mixed cloud computing environment in which applications are running on a combination of private and public clouds. The company uses its own data center resources but deploys separate services, such as a machine learning platform or the Kubernetes container orchestration system, in a public cloud. Hybrid clouds allow you to create a single, scalable environment while also maintaining organizational control over sensitive data.
Multi‑cloud. A multi‑cloud system, which makes use of services from multiple cloud providers, is perhaps the most flexible option. You can transfer data from one cloud provider to another or deploy applications and platforms using multiple cloud providers at the same time. Such an approach reduces the likelihood of failure while increasing the IT infrastructure’s reliability and fault tolerance.
Community cloud. Community cloud environments are used by companies with similar ethics, for example, by financial institutions. Community clouds can be owned and operated by users or by a third‑party cloud service provider.