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VMware is a California based company founded in 1998 that specializes in providing a platform for the virtualization of IT infrastructure. The company is known worldwide for the vSphere VMware Hypervisor which enables the virtualization of practically any x86 or x64 architecture. Since 1998, VMware’s growth has been unprecedented. It was acquired by EMC in 2004 (EMC was acquired by Dell in 2016), and since these acquisitions, many more products have been added to the VMware inventory. VMware now has a major presence in private data centers, cloud management services, virtualized storage and networking, as well as desktop software.
Arguably the best-known product by VMware is vSphere. vSphere includes many products, most notably the ESXi hypervisor and the vCenter suite of applications. ESXi is an operating system installed on a compatible enterprise-class server. ESXi is powered by the VMKernel, which manages the virtual machines allowing them to be created and interacted with. The VMKernel directly manages the host I/O between allocated resources and the virtual machines.
Users can connect directly to an ESXi host IP using the vSphere Web Client and start deploying virtual infrastructure. Managing a single host is perfectly acceptable in a lab environment; however, in an enterprise environment, multiple hosts are used with numerous storage and networking components. To use many of the licensed enterprise-class features of vSphere, such as cloning servers, vMotion, high availability and DRS, this requires a vCenter server.
The vCenter Server (VC) is a licensed product that allows you to configure, deploy, and manage the entire virtual machine lifecycle from a centralized location. It is used to manage multiple ESXi hosts.
Each virtual environment requires at least 1 vCenter server. Once installed, vCenter can be accessed via a web GUI and can manage the entire connected virtualized estate. It is used to simplify management of VMs, complete daily admin tasks, and complete virtualized infrastructure management. vCenter provides access to all the connected clusters, hosts, networking, and storage from one easy-to-manage web interface. For a developer, VMware PowerCLI can be used to automate management of vSphere.
The VMware vCloud suite is a software-defined datacenter solution based on a vSphere private cloud implementation. It has evolved from vSphere due to the changing demands of Cloud / IT managed service providers. It offers a full cloud solution with datacenter virtualization, automated operations (vRealize), high availability, resilient infrastructure, and, more recently, infrastructure delivery automation (vSAN / NSX).
VMware vCloud includes several key features. It uses vSphere for computing and vRealize Automation for a policy-defined compute automation, for example, creating a policy-driven automated host deployment. vRealize Operations manager is also included; this is a capacity management suite and licensing manager used to monitor the entire virtual infrastructure and predict future capacity requirements.
A typical vCloud Cloud Management setup consists of at least 2 sites. Each site is connected by a dark fiber, and each has multiple hosts and replicated storage. vCloud includes the VMware vCenter Site Recovery Manager (SRM), a high availability disaster recovery solution which replicates data between sites. In the event of a disaster, SRM will use predefined policies to failover servers and services from Site A to Site B. It is an automated process and enables managed service providers to offer 99.99% (always online) uptime capability.
A more recent trend of VMware has been to virtualize more hardware-based datacenter features into its products. Since the release of vSphere 5.0 in 2014, VMware has offered 2 products aimed at virtualizing the storage and network fabrics of a datacenter. Traditionally, datacenters would consist of several ESXi hosts, various storage devices (SAN) and associated SAN Switches, as well as the network infrastructure layer. VMware vSAN and VMware NSX provide a storage virtualization layer and a network virtualization layer in what VMware calls a hyper-converged infrastructure.
vSAN is a software-defined enterprise-class storage solution. vSAN can use any typical server storage as part of a larger virtual storage device. vSAN then applies deduplication and compression to the data to minimize the VM footprint, which in turn can provide better performance than traditional storage infrastructure can. There is no need for a dedicated storage SME, as all policy creation and storage management is done in vCenter. vSAN can be scaled up simply by adding more storage to the provisioned vSAN Hosts.
VMware have also recently introduced NSX, which provides virtualization of the entire network fabric. It provides a secure, agile virtual network which is managed by vCenter. NSX can virtualize the role of any firewall, switch, router or load balancer. Network policies can be applied per server, allowing you to isolate infrastructure to different parts of the network, thus improving overall network security. NSX network templates can be deployed instantly, enabling professionals to build network infrastructure from their workspace in a few clicks.
The software discussed so far is typically used for datacenter-based infrastructure services, but VMware also has a large presence in the desktop workspace. VMware was founded on the success of VMware Workstation, which allows any Windows or Linux-based computer to run virtual machines. Also, VMware Horizon is the VMware virtual desktop environment (VDI), which allows desktop and applications to be delivered directly to the user on any type of workstation. This is commonly used within organizations to provide employees access to a centralized and identity-controlled application stack.
The VMware cloud is the offering from VMware for cloud-based infrastructure services. It is heavily integrated with Amazon Web Services (AWS) and offers the user a cloud-based service of many of the popular VMware applications discussed here. This eliminates the requirement for local datacenter services and the cost associated with it, and enables many individuals or companies to leverage VMware products for their personal use. Many businesses are moving toward the cloud as part of their future IT strategy.
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