Linux Integration Services Version 3.5 For Hyper-V Is Released

Microsoft has released version 3.5 of the Hyper-V integration components for Linux.  This download is intended for versions of Linux that do not have the Linux Integration Services (LIS) for Hyper-V already installed in the kernel.

Version 3.5 of the LIS supports:

  • Red Hat Enterprise Linux (RHEL) 5.5-5.8, 6.0-6.3 x86 and x64
  • CentOS 5.5-5.8, 6.0-6.3 x86 and x64

Hyper-V from 2008 R2 onwards is supported, including Windows 8 and 8.1.

The below matrix describes which Hyper-V features are supported in which version of the LIS and distro/version of Linux:

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  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 iSCSI 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.

The following features are not available in this version of LIS:

  • Dynamic Memory hot-add support
  • TRIM support
  • TCP offload
  • vRSS
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