What is openstack quantum

Heartbeats, messages every component sends to the Quantum server periodically, are the cornerstone of the scheduling mechanism in Quantum. Heartbeats are sent asynchronously over the message queue, and then are handled by the Quantum server, which stores all the latest heartbeat information.

Since all the components use a common message queue, the Quantum server automatically discovers any new component running in the specific Quantum setup. When an object such as a router or a network is being created, all required services must be configured to serve it. Services are provided by different Quantum components, and configuration is limited to sending them appropriate messages.

The Quantum agent scheduler receives all the required information from heartbeat messages, and the default algorithm in Grizzly schedules objects randomly to active agents. An agent is considered active if the latest heartbeat was received in a timespan that does not exceed the limit defined in the Quantum configuration file.

No internal state information is taken into account. Once an object is scheduled to an agent, the Quantum server creates a permanent record about that relationship and sends all requests related to that object to that specific agent. If a component goes down, it stops sending heartbeats, and after a defined period of time it is considered as an inactive component, so no new objects will be scheduled to it.

As long as the host the agent was running on is up, all the services continue working. Also, the default scheduling algorithm in Quantum Grizzly does not perform any scheduling for objects that are already hosted by at least one other component. Relationships, however, can be created or modified manually. The Quantum API provides methods for binding objects to components.

So if there is a need to host a single object on a multiple agents, that can be done using the CLI client or any other tool that uses the Quantum API. Overall, Grizzly Quantum provides more flexibility, scalability, and reliability as your clusters grow. Get blogs and other content delivered straight to your inbox. Yes, guys from Quantum Core team managed to implement, review and merge this scheduler in time.

The customer wants to destroy a Quantum network and all the resources associated with it. This will require using Quantum for the following operations:. Jump to: navigation , search. Use Cases For Quantum API Quantum is a project to provide "network connectivity as a service" between devices managed by other Openstack services such as nova. WordPress Shortcode.

Next SlideShares. Download Now Download to read offline and view in fullscreen. Download Now Download Download to read offline. Your first patch to OpenStack. OpenStack Storage Buddy Ceph. OpenStack Watcher. State of Containers in OpenStack. Related Books Free with a 30 day trial from Scribd. Related Audiobooks Free with a 30 day trial from Scribd. Views Total views. Actions Shares. No notes for slide. Openstack Quantum 1. OpenStack - Quantum an intro.. Currently, the creators of such plugins are responsible for device-specific testing.

Jump to: navigation , search. Packaging for several distros, including Ubuntu, Debian, and Red Hat. Integrated Devstack support. Is project currently open sourced? What license?