Linux Integration Services Version 3.5 for Hyper-V
Hyper-V supports both emulated (“legacy”) and Hyper-V-specific (“synthetic”) devices for Linux virtual machines. When a Linux virtual machine is running with emulated devices, no additional software is required to be installed. However, emulated devices do not provide high performance and cannot leverage the rich virtual machine management infrastructure that the Hyper-V technology offers. To make full use of all benefits that Hyper-V provides, it is best to use Hyper-Vspecific devices for Linux. The collection of drivers that are required to run Hyper-V-specific devices is known as Linux Integration Services (LIS).
For certain older Linux distributions, Microsoft provides an ISO file containing installable LIS drivers for Linux virtual machines. For newer Linux distributions, LIS is built into the Linux operating system, and no separate download or installation is required. This guide discusses the installation and functionality of LIS drivers on older Linux distributions.
Blow are the main Points that comes with version 3.5
New OS with 3.5
Expands the list of supported distributions to include RHEL/CentOS 5.5-5.6.
Supported Virtualization Server Operating Systems
This version of Linux Integration Services (LIS) supports the following versions of Hyper-V:
Windows Server 2008 R2 Standard, Windows Server 2008 R2 Enterprise, and Windows Server 2008 R2 Datacenter
Microsoft Hyper-V Server 2008 R2
Windows 8 Pro
Windows 8.1 Pro
Windows Server 2012
Windows Server 2012 R2
Microsoft Hyper-V Server 2012
Microsoft Hyper-V Server 2012 R2
When installed on a virtual machine that is running a supported Linux distribution, LIS 3.5 for Hyper-V provides the functionality listed in the table below. For comparative purposes, hereunder also list the features available in LIS 3.4. This allows users to decide if they want to upgrade from LIS 3.4 to LIS 3.5.
1. Static IP injection might not work if Network Manager has been configured for a given HyperV-specific network adapter on the virtual machine. To ensure smooth functioning of static IP injection, ensure that either Network Manager is turned off completely, or has been turned off for a specific network adapter through its Ifcfg-ethX file.
2. When you use Virtual Fibre Channel devices, ensure that logical unit number 0 (LUN 0) has been populated. If LUN 0 has not been populated, a Linux virtual machine might not be able to mount Virtual Fibre Channel devices natively.
3. If there are open file handles during a live virtual machine backup operation, the backed-up virtual hard disks (VHDs) might have to undergo a file system consistency check (fsck) when restored.
4. Live backup operations can fail silently if the virtual machine has an attached iSC SI device or a physical disk that is directly attached to a virtual machine (“pass-through disk”).
5. LIS 3.5 only provides Dynamic Memory ballooning support—it does not provide hot-add support. In such a scenario, the Dynamic Memory feature can be used by setting the Startup memory parameter to a value which is equal to the Maximum memory parameter. This results in all the requisite memory being allocated to the virtual machine at boot time—and then later, depending upon the memory requirements of the host, Hyper-V can freely reclaim any memory from the guest. Also, ensure that Startup Memory and Minimum Memory are not configured below distribution recommended values.