Cloud (operating system)

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A cloud operating system (cloud OS) is a specialized type of operating system designed to manage cloud computing environments and support the deployment and operation of applications and services in a distributed cloud infrastructure. Unlike traditional operating systems that manage the resources of a single device, a cloud OS orchestrates resources across multiple virtual or physical machines located in data centers around the world.

Cloud operating systems serve as the backbone of modern cloud computing platforms by abstracting the underlying hardware and enabling dynamic provisioning of computing resources. They play a critical role in Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and hybrid cloud models, offering APIs and tools for automation, scalability, and multi-tenancy.

A cloud OS provides interfaces for administrators, developers, and users to deploy, monitor, and manage workloads through a centralized or distributed control system.

The concept of a cloud operating system evolved alongside the development of cloud computing and virtualization technologies in the early 21st century. While traditional operating systems were designed to manage individual machines, the need for managing distributed computing resources across networks gave rise to cloud OS platforms.

• In the 1990s, the idea of utility computing and grid computing laid the groundwork for cloud concepts, emphasizing shared resource usage and remote computation.
• Virtualization technologies such as VMware's hypervisor (1999) enabled multiple operating systems to run on a single physical machine, a core capability in cloud systems.
• Operating system research during this period also explored distributed and network-based OS architectures, such as Plan 9 from Bell Labs.

• The term "cloud computing" gained popularity in the mid-2000s, particularly after Amazon Web Services (AWS) launched EC2 in 2006, offering scalable, on-demand virtual servers.
• Cloud providers began developing internal platforms to manage large-scale infrastructure, such as Google's Borg, Microsoft’s Red Dog (later Azure), and Amazon's custom tools.
• These platforms acted as cloud operating systems but were not made public initially.

• OpenStack was launched in 2010 by Rackspace and NASA as an open-source project to create a full-fledged cloud operating system for public and private cloud infrastructures.
• CloudStack, originally developed by Cloud.com and later acquired by Citrix, became an Apache project in 2012.
• Eucalyptus, a platform for building AWS-compatible private clouds, also emerged in this period.
• Google Chrome OS, launched in 2009, represented a shift toward lightweight, cloud-first desktop experiences for end-users, focusing on web applications rather than local processing.

• The 2020s saw the rise of container orchestration platforms like Kubernetes, which many consider a modern evolution of cloud OS due to its resource management and scheduling features.
• Hybrid and multi-cloud management tools, such as Microsoft Azure Stack and VMware Tanzu, further extended cloud OS capabilities into on-premises environments.
• Emerging technologies like serverless computing and edge computing have challenged the cloud OS landscape, prompting adaptations in scalability, latency, and event-driven architecture handling.

These systems are designed to manage large-scale cloud infrastructures, including compute, storage, and networking. They handle tasks such as resource scheduling, virtualization, fault tolerance, and load balancing.

Notable examples include:

• OpenStack – An open-source cloud platform that supports private and public cloud deployments.
• VMware vSphere – A commercial cloud infrastructure suite offering virtualization and resource management.
• Apache CloudStack – An open-source platform for deploying and managing cloud services.
• Microsoft Azure Stack – An extension of Microsoft Azure for on-premises hybrid cloud environments.

These systems offer lightweight, browser-based desktop environments, often designed for users to access files and applications hosted in the cloud.

Examples include:

• Google Chrome OS – A Linux-based OS focused on web apps and cloud integration.
• eyeOS – A web desktop interface (now discontinued) offering file and application access via the cloud.
• Joli OS – A discontinued Linux-based OS built for netbooks and cloud desktops.

Typical features of cloud operating systems include:

• Virtualization support for virtual machines (VMs) and containers.
• Elastic scalability to increase or decrease resources based on demand.
• Resource orchestration for managing compute, storage, and network components.
• Multi-tenancy to securely host multiple users or organizations on the same infrastructure.
• Self-service portals and RESTful APIs for automation and integration.
• Monitoring and logging to track performance and availability.
• Security and compliance controls to manage access and protect data.

• Cost efficiency via on-demand resource provisioning.
• High availability and disaster recovery through resource redundancy.
• Rapid deployment of applications and services.
• Centralized administration across distributed environments.
• Flexible integration with DevOps and CI/CD workflows.

• Complexity in setup and configuration.
• Security and data privacy risks, especially in multi-tenant public clouds.
• Vendor lock-in due to proprietary technologies.
• Latency and performance variations in geographically distributed environments.

• Cloud computing
• Operating system
• Virtualization
• Infrastructure as a service
• Platform as a service
• Container orchestration

• Mell, P., & Grance, T. (2011). The NIST Definition of Cloud Computing. National Institute of Standards and Technology.
• Armbrust, M. et al. (2010). A View of Cloud Computing. Communications of the ACM, 53(4), 50–58.
• OpenStack Documentation
• Apache CloudStack Documentation
• VMware vSphere Features
• Good OS introduce quick boot Cloud OS for netbooks Archived 2009-05-02 at the Wayback Machine

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