IT Architect and highly skilled in IT Security, he has a broad background in the Open Source world. He has worked as a consultant for companies such as Red Hat, Canonical, Sun and IBM, in addition to being Managing Director of the Swiss multinational GARL. He also deals with technologies about CloudStack and OpenStack, for which he has written a reference manual.
Nova – Compute
Probably the most known among the projects, it provides virtual servers upon demand. Nova is the most complicated and distributed component of OpenStack. A large number of processes cooperate to turn end user API requests into running virtual machines.
These are the Nova components and their functions:
Nova also interacts with many other OpenStack services: Keystone for authentication, Glance for images and Horizon for the web interface. The Glance interactions are central to OpenStack. The API process can upload and query Glance while nova-compute will download images for launching images.
Historically, most OpenStack development is done with the most community supported KVM: this allows you to refer to Internet forums to find help on your issues. All the features that are currently supported in KVM are also supported in QEMU.
Microsoft Hyper-V and VMware ESXi too are gaining much support, with Hyper-V now being available with a free license. ESXi can also be used with a free license however API support is limited to READ ONLY without vCenter or an Enterprise license.
Nova has support for XenServer and XCP through the XenAPI virt layer. Note that this does not imply support for other Xen-based platforms such as those shipped with RHEL 6 or SUSE, which is provided via the libvirt layer (i.e. Xen via libvirt).
Nova also supports bare metal provisioning through the Ironic project, that means it is possible to deploy to hardware in the same way the end user deploys virtual machines. By default, it will use PXE and IPMI in concert to provision and turn on/off machines, but Ironic also supports vendor-specific plugins which may implement additional functionality. Some vendors, most notably HP Helion, use Ironic to deploy OpenStack itself.
Glance – Image Store
It provides discovery, registration and delivery services for disk and server images.
List of components and their functions:
Glance accepts API requests for images (or image metadata) from end users or Nova components, and can store its disk files in the object storage service, Swift or other storage repository.
Neutron – Network
Neutron provides “network connectivity as a service” between interface devices (e.g., vNICs) managed by other OpenStack services (e.g., Nova). The service works by allowing users to create their own networks and then attach interfaces to them. Neutron has a pluggable architecture to support many popular networking vendors and technologies.
Neutron will interact mainly with Nova, where it will provide networks and connectivity for its instances.
Cinder – Block Storage
Cinder allows block devices to be exposed and connected to compute instances for expanded storage & better performance.
Like Neutron, Cinder will mainly interact with Nova, providing volumes for its instances.
GURU advisor will be at the Mobile World Congress in Barcelona from February 22nd to 25th 2016!
MWC is one of the biggest conventions about the worldwide mobile market, we'll be present for the whole event and we'll keep you posted with news and previews from the congress.Read More