oVirt Blog
Bringing high performance virtual machines to oVirt!
Introducing a new VM type in oVirt 4.2.0 Alpha. A newly added checkbox in the all-new Administration Portal delivers the highest possible virtual machine performance, very close to bare metal.
What does it do?
Some of the magic includes:
Enable Pass-Through Host CPU
Enable IO Threads, Num Of IO Threads = 1
Set the IO and Emulator threads pinning topology
For the full feature set, see the very detailed High Performance VM feature page
Count me in! How do I set it […]
On September 28, the oVirt project released version 4.2.0 Alpha, available for Red Hat Enterprise Linux 7.4, CentOS Linux 7.4, or similar.
This pre-release version should not be used in production, and is not feature complete.
oVirt is the open source virtualization solution that provides an awesome KVM management interface for multi-node virtualization. This maintenance version is super stable and there are some nice new features.
what’s new in oVirt 4.2.0?
Here’s an overview of the new main features:
The Administration Portal has been redesigned from scratch using Patternfly, a widely adopted standard in […]
Starting up a virtual machine (VM) is not an easy task, there are a lot of things going on hidden from the plain sight and studying it alone is a challenging task. The goal of this post is to simplify the process of learning how the oVirt hypervisor works. The concept of the oVirt is illustrated in the process of starting up the VM, which covers everything from top to the bottom.
Disclaimer: I am an engineer working close to the host part of the oVirt, therefore my knowledge of the engine is limited.
Architecture
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DPDK (Data Plane Development Kit) provides high-performance packet processing libraries and user space drivers.
Open vSwitch uses DPDK libraries to perform entirely within the user space. According to Intel ONP performance tests, using OVS with DPDK can provide a huge performance enhancement, increasing network packet throughput and reducing latency.
OVS-DPDK has been added to the oVirt Master branch as an experimental feature. The following post describes the OVS-DPDK installation and configuration procedures.
Please note: Accessing the OVS-DPDK feature requires installing the oVirt Master version. In addition, OVS-DPDK cannot access any features located within the Linux kernel. This includes […]
The recent post, An Introduction to Ansible Roles, discussed the new roles that were introduced in the oVirt 4.1.6 release. This follow-up post will explain how to set up and use Ansible roles, using either Ansible Galaxy or oVirt Ansible Roles RPM.
Ansible Galaxy
To make life easier, Ansible Galaxy stores multiple Ansible roles, including oVirt Ansible roles. To install the roles, perform the next steps:
To install roles on your local machine, run the following command:
$ ansible-galaxy install ovirt.ovirt-ansible-roles
This will install your roles into directory /etc/ansible/roles/ovirt.ovirt-ansible-roles/.
By default, Ansible only […]
As a developer, one drawback of using Google Web Toolkit (GWT) for the oVirt Administration Portal (aka webadmin) is that the GWT compile process takes an exceptionally long time. If you make a change in some code and rebuild the ovirt-engine project using make install-dev …, you’ll be waiting several minutes to test your change. In practice, such a long delay in the usual code-compile-refresh-test cycle would be unbearable.
Luckily, we can use GWT Super Dev Mode (“SDM”) to start up a quick refresh-capable instance of the application. With SDM running, you can make a change in GWT […]
Today I would like to share with you some of the integration work with Ansible 2.3 that was done in the latest oVirt 4.1 release.
The Ansible integration work was quite extensive and included Ansible modules that can be utilized for automating a wide range of
oVirt tasks, including tiered application deployment and virtualization infrastructure management.
While Ansible has multiple levels of integrations, I would like to focus this article on oVirt Ansible roles. As stated in the Ansible documentation: “Roles in Ansible build on the idea of include files and combine them to form clean, reusable abstractions – they […]
Python SDK version 4.1.4 introduced support for sending asynchronous requests and HTTP pipelining.
This blog post explains those terms and will show you an example how to use the Python SDK in an asynchronous manner.
Asynchronous Requests
When using asynchronous requests, the client sends the request and defines a method (usually called callback), which should be called after the response is received but the client is not waiting for the response. In order for SDK to work in an asynchronous fashion, we introduced two new features to our SDK: multiple connections and HTTP pipelining.
These […]
oVirt Engine provides a powerful way to manage users and domains using the oVirt Engine AAA extensions. oVirt Engine supports many different LDAP server types for authentication using the ovirt-engine-extension-aaa-ldap extension and supports managing internal users using the ovirt-engine-extension-aaa-jdbc extension. Clients can use the powerful oVirt Engine user management in their applications by using the OAuth2 or OpenId Connect end points provided by oVirt Engine SSO to authenticate users in their applications.
Below is step-by-step instructions on how to integrate Kibana/Elasticsearch on top of OpenShift with oVirt Engine SSO. The instructions should work for any client application that can […]
The oVirt project is glad to announce that five talented students will be joining the oVirt community over the summer period, as part of the 2017 Google Summer of Code (GSoC) and Outreachy internship programs.
Both GSoC and Outreachy focus on getting more student developers interested in open source software development, as well as providing opportunities for talented people, underrepresented in the tech world, to gain valuable technology experience. The students will spend their summer break writing code, learning about open source development and documentation, and earning a stipend.
Joining us as part of GSoC are:
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