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|"Original author(s)||"Red Hat|
4.1.6 / September 18, 2017
|Available in||"English, "Japanese, "French, "German, "Italian, "Spanish|
|"Licence||"Apache License 2.0|
oVirt is "free, open-source "virtualization management platform. It was founded by "Red Hat as a community project on which "Red Hat Enterprise Virtualization is based. It allows centralized management of "virtual machines, compute, storage and networking resources, from an easy-to-use web-based front-end with "platform independent access. "KVM on "x86-64 architecture is the only "hypervisor officially supported, but there is an ongoing effort to support "PPC and "ARM architectures in the future releases.
oVirt consists of two basic components, oVirt engine and oVirt node.
The oVirt engine backend is written in "Java, while the frontend is developed with "GWT web toolkit. The oVirt engine runs on top of the "WildFly (former JBoss) "application server. The frontend can be accessed through a webadmin "portal for administration, or a user portal with privileges, and features that can be fine tuned. User administration can be managed locally or by integrating oVirt with "LDAP or "AD services. The oVirt engine stores data in a "PostgreSQL "database. "Data warehousing and "reporting capabilities depend on additional history and reports databases that can be optionally instantiated during the setup procedure. "RESTful API is available for customizing or adding engine features.
An oVirt node is a "server running "RHEL, "CentOS, "Fedora or experimentally "Debian, with KVM hypervisor enabled and a VDSM (Virtual Desktop and Server Manager) "daemon written in "Python. Management of resources initiated from a webadmin portal are sent through the engine backend that issues appropriate calls to the VDSM daemon. VDSM controls all resources available to the node (compute, storage, networking) and virtual machines running on it and is also responsible for providing "feedback to the engine about all initiated operations. Multiple nodes can be "clustered from the oVirt engine webadmin portal to enhance "RAS.
The oVirt engine can be installed on a standalone server, or can be hosted on a cluster of nodes themselves inside a virtual machine (self-hosted engine). The self-hosted engine can be manually installed or automatically deployed via a "virtual appliance.
Virtual "datacenters, managed by oVirt, are categorized into storage, networking and clusters that consist of one or more oVirt nodes. "Data integrity is ensured by "fencing, with agents that can use various resources such as "baseboard management controllers or "uninterruptible power supplies.
Storage is organized within entities called storage domains and can be local or shared. Storage domains can be created by using the following storage solutions or protocols:
Network management allows defining multiple "VLANs that can be "bridged to the "network interfaces available on the nodes. Configuration of "bonded interfaces, "IP addresses, "subnet masks and "gateways on managed nodes are all supported within webadmin portal interface, as is "SR-IOV on hardware configurations that support this feature.
Virtual machine management enables selecting high availability priority, "live migration, live "snapshots, cloning virtual machines from snapshots, creating virtual machine templates, using cloud-init for automated configuration during provisioning and deployment of virtual machines. Supported "guest operating systems include "GNU/Linux, "Microsoft Windows and "FreeBSD. Access to virtual machines can be achieved from webadmin portal using "SPICE, "VNC and "RDP protocols.
oVirt can be integrated with many open source projects, including "OpenStack "Glance and "Neutron for disk and network provisioning, "Foreman/Katello for VM/node provisioning or pulling relevant errata information into webadmin portal and can be further integrated with "ManageIQ for a complete virtual infrastructure "lifecycle management.
"Disaster recovery features include the ability to import any storage domain into different oVirt engine instances and "replication can be managed from oVirt with GlusterFS "geo-replication feature, or by utilizing synchronous/asynchronous block level replication provided by storage hardware vendors. oVirt engine "backups can be automated and periodically transferred to a remote location.
Work is being done["when?] towards using oVirt in "hyper-converged infrastructure deployment scenarios. Self-hosted engine and "Gluster-based storage domains allow centralized management of all resources that can be seamlessly expanded, simply by adding an appropriate number of nodes to the cluster, without having any "single points of failure.