应用程序在Windows客户端VM中的一致VM快照...

  • 2021年11月30日
  • 5个答复
  • 177意见
d
Userlevel 1
徽章 +2
  • didi7
  • 开拓者
  • 18个答复

大家好，

我注意到应用程序一致的VM快照，例如Windows 10 Pro VM启用了NGT并安装在VM中，并使用“ NCLI NGT列表”进行了验证，并且在以下警报中导致了以下警报。

VM“ Test-VM”不支持VSS快照，因为没有安装VSS软件。

和 …

VSS已启用，但是在由Test-VM保护的访客VM（S）测试VM上未安装VSS软件或PRE_FREEZE/POS_FREEZE/POST_THAW脚本。

使用Windows Server 2016 VM与各自的保护域生成应用程序一致的Nutanix VM快照。使用Windows 10 VM，它将行不通。在2个不同的Nutanix簇中进行了验证。

群集配备了AOS 5.15.4 LTS版本。

我找不到一个提示，不支持Windows 10 VM。

问候，

didi7

Hello everybody,<\/p>

\u00a0<\/p>

I noticed that application consistent VM snapshots of e.g. Windows 10 Pro VMs with NGT enabled and installed in the VM and verified with \u2018ncli ngt list\u2019 doesn\u2019t work and results in the following alert\u2026<\/p>

\u00a0<\/p>

VSS snapshot is not supported for the VM 'TEST-VM', because VSS software is not installed.<\/p>

\u00a0<\/p>

and \u2026<\/p>

\u00a0<\/p>

VSS is enabled but VSS software or pre_freeze\/post_thaw scripts are not installed on the guest VM(s) TEST-VM\u00a0protected by TEST-VM.<\/p>

\u00a0<\/p>

Using a Windows Server 2016 VM with the respective Protection Domain generates application consistent Nutanix VM snapshots. With Windows 10 VMs it won\u2019t work. Verified in 2 different Nutanix clusters.<\/p>

\u00a0<\/p>

Clusters are equipped with AOS 5.15.4 LTS version.<\/p>

\u00a0<\/p>

Nowhere I could find a hint, that Windows 10 VMs are not supported.<\/p>

\u00a0<\/p>

Regards,<\/p>

Didi7<\/p>

\u00a0<\/p>","quoteUsername":"Didi7","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

5个答复

谢尔盖·伊万诺夫
秩
Userlevel 4
徽章 +5

以下文章有答案：

https://portal.nutanix.com/page/documents/details?targetId=prism-element-element-data-protection-guide-v6_0:wc-dr-application-snapsistent-snapshots-napshots-wc-r.html

基本上，在NGT处于活动状态时，在Windows Server应用程序上，一致的快照将起作用。在Windows 10上，您需要NGT和PRE_FREEZE/POST_THAW脚本，以进行应用程序快照。

高级SRE |Nutanix Worldwide支持|NSS＃464，NCAP，VCP6.5-DCV，RHCSA，CCNA，EMCSA，AWS和Google Cloud认证
d
Userlevel 1
徽章 +2

你好谢尔盖，

只要在VM上安装和激活NGT并且存在相关的保护域，APP一致的与Windows服务器的快照备份完美地工作。

换句话说，对例如Windows 10您需要创建一个pre_freeze.bat和post_thaw.bat脚本如下…

@echo离开

ver

这很简单吗？我们不需要关闭这些特定VM上的任何服务。

奇怪的是，这确实在没有这些脚本的情况下可以在Windows Server上使用，但在Windows 10上不行。

问候，

didi7

Hello Sergei,<\/p>

\u00a0<\/p>

app consistent snapshot backups with Windows Servers work perfectly, as long as NGT is installed and activated on the VM and the relevant Protection Domain exist.<\/p>

\u00a0<\/p>

In other words, to have the same effect on e.g. Windows 10 you need to create a pre_freeze.bat and post_thaw.bat script like the following \u2026<\/p>

\u00a0<\/p>

@echo off<\/p>

ver<\/p>

\u00a0<\/p>

Is it that simple? We don\u2019t need to shutdown any services on those specific VMs.<\/p>

\u00a0<\/p>

Strange that this does work on Windows Server without those scripts but not on Windows 10.<\/p>

\u00a0<\/p>

Regards,<\/p>

Didi7<\/p>

\u00a0<\/p>","quoteUsername":"Didi7","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

d
Userlevel 1
徽章 +2

好的，现在使用pre_freeze.bat和post_thaw.bat中的Windows 10工作，例如

C：\ Program Files \ Nutanix \脚本

有内容…

@echo离开

ver

有趣的！

Ok, it works now for Windows 10 using pre_freeze.bat and post_thaw.bat in e.g.<\/p>

\u00a0<\/p>

C:\\Program Files\\Nutanix\\scripts<\/p>

\u00a0<\/p>

with contents \u2026<\/p>

\u00a0<\/p>

@echo off<\/p>

ver<\/p>

\u00a0<\/p>

Funny!<\/p>

\u00a0<\/p>","quoteUsername":"Didi7","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

谢尔盖·伊万诺夫
秩
Userlevel 4
徽章 +5

Windows Server和客户端版本之间的区别在于VSS组件中。对于应用程序一致的快照，VSS正在处理一致性。在服务器版本上，就足够了。由于客户端Windows版本缺乏功能，Nutanix群集必须依靠冻结/融化脚本来要求IO，并且无法检查IO是否实际上是Quess的，因此即使您放置空脚本文件，快照将被视为应用程序一致的，但是如果您的脚本不做适当的工作来要求应用程序，那么这些快照实际上并不是应用程序一致，这只是欺骗系统的一种方法。这些快照实际上会碰撞。

因此，要使您的快照在Windows 10上真正符合应用程序，您需要确保您的冻结/解冻脚本写得很好，并且实际上是在要求应用程序IO。

高级SRE |Nutanix Worldwide支持|NSS＃464，NCAP，VCP6.5-DCV，RHCSA，CCNA，EMCSA，AWS和Google Cloud认证
The difference here between the Windows Server and Client versions is in the VSS components. For the application consistent snapshots the VSS is handling the consistency. and on the server versions it is enough.\u00a0As the client Windows versions are lacking that capability, the Nutanix cluster has to rely on the freeze\/thaw scripts to quesce the IO and it has no way to check if the IO is actually quesced, so even if you put empty script files, the snapshot will be counted as app consistent, but if your scripts do not do the proper job to quesce the applications, those snapshots will not in fact be application consistent and it is only a way to trick the system. Those snapshots will be in fact crash-consistent.<\/p>

So, to make your snapshots truly app-consistent on Windows 10\u00a0you need to ensure that your freeze\/thaw scripts are well-written and that they actually quesce the application IO.<\/p>","quoteUsername":"Sergei Ivanov","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

d
Userlevel 1
徽章 +2

当然，这些pre_freeze/post_thaw脚本是伪造的，但是只要Windows 10 VM的作用就像可以说是文件服务器，它仍然是应用程序或操作系统。

在VMware vSphere中，您只需要VMware工具，而无需脚本即可创建应用程序一致的快照（当然只要没有特定的应用程序），例如Windows VM，例如Windows 10，具体取决于备份软件。

Veeam B＆R具有自己的专有AAIP集成，可以在使用VSPhere作为Hypervisor时创建一个独立于VMware工具的应用程序的快照。

Of course those pre_freeze\/post_thaw scripts are fake, but as long as the Windows 10 VM just acts as let\u2019s say a file-server, it is still application or OS consistent.<\/p>

In VMware vSphere you just need VMware Tools and no scripts to create application consistent snapshots (of course as long as there is no specific application) for Windows client VMs, like Windows 10, depending on the backup software.<\/p>

Veeam B&R has its own proprietary AAIP integration to create app consistent snapshots being independent from VMware Tools, when using vSphere as Hypervisor.<\/p>","quoteUsername":"Didi7","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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