Nutanix Prism Demo Video AOS 5.1

Heres a great video demo of Nutanix Prism interface.

Its always best to demo Prism live so that you can drill into each element in more detail, focusing on the topics that a  prospect would like to see more in more detail. However, sometimes due to network constraints this isn’t always possible. I really like this recording of the Prism demo that was put together by Eric Wamsley a fellow Systems Engineer at Nutanix.

Clone-NTNXVolumeGroup CmdLet Parameters

To obtain the list of manditory and Optional parameters of a CmdLet (Clone-NTNXVolumeGroup in this case), you can use the the following :-

 

the above returns :-

 

Blogs moved

Sorry if you visited over the last 24 hours and were unable to access any content. I have just been migrating the site from Azure to a hosting provider and experienced a database issue. Anyhow this has now been resolved and the blog is nicely running at its new home.

we-have-moved-to-funstoo

Add a Folder to the Write Cache drive of Multiple PVS Targets – PowerShell

I recently needed to create a folder on the Writecache disk for the persistence of Eventlog files. Unfortunatley the customer already had around 40 XenApp hosts deployed.

I wrote a script which can be run from a machine with the Citrix Powershell commandlets installed, ie DDC. This Script lists all the Targets in the site and pipes them to the create folder command.

Ensure you have enabled the Citrix Snapins first…

And heres the code I created…

Migration to Azure

After lots of power outages and issues with my home server infrastructure, I have decided to migrate M4T to the cloud. As part of the move I thought it best to take the opportunity to change the Blog name to MattNics.com. It was pointed out that the previous name M4T was internet dating slang for Males looking for Transvestites. Rather unfortunate, so it had to go. I reckon my hit count will drop significantly now 😉

Desktop availability with XenApp and XenDesktop 7.5

 

Last Tuesday, CItrix launched news of its new incarnation of the XenDesktop Product, version 7.5. With this release, the functionality known as XenDesktop App edition, the provision of seamless applications and shared hosted desktops has been rebranded to XenApp 7.5. Does this mean the return of XenApp as we know it? Frankly no, it’s the same FMA application publishing technology that started in XenDesktop version 7. So, if you wish to publish an application or a Shared desktop, you need a server on which you install the XenDesktop VDA. This enables the server to be used to deliver its desktops and installed applications using the Citrix HDX protocol.

One interesting development however, is the announcement that XenDesktop will now support the provision of applications and desktops within a public cloud platform.

This is intended to offer organisations the ability to deliver Windows desktop sessions and applications to users from their on-premise cloud, but expand out to other clouds such as Amazon Web Service or Azure possibly if extra capacity is required to meet peaks in demand, for example.

This means that customer will use the same management console to control user sessions, wherever they are hosted. Ultimately this will enable them to use any of the large public clouds on the market, but initial support is for AWS, or public or private clouds based on the CloudStack platform.

I personally think this will be useful when designing a disaster recovery solution for a customer that already use cloud for their other services as you’d want your desktops adjacent to your data.

On the cloud you could host a Netscaler VPX appliance and extend the XenDesktop/App farm using GSLB (global Server Load Balancing) as automated failover.

Upgrade packages are yet to be disclosed however Citrix has announced a discount on XenMobile licences with its platinum version. As well as the XenMobile incentive platinum customers also receive App DNA for application migration.

All in all, some exciting developments on the horizon.

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Citrix CTP site links

Whilst on Carl Webster’s blog, who by the way has fantastic Citrix Farm Documentation Scripts, I found a list of all the Citrix Citrix Technology Professional (hopefully all) and their blog sites. Very useful if you want to see what Citrix Value in the community.

Anyway here’s the list

 

Citrix Technology Professional Sites

 

 

Sorry if anyone has been missed off. The full list of awardees can be found here… https://www.citrix.com/community/ctp/awardees.html

Network Settings missing from XenServer after Pool Problem.

I have encountered several times that after a shutdown and restart on a XenServer host when it is configured as a pool, sometimes the pool members come up with no management interface because there are no network cards shown. The main reason I have seen this is because the pool-master server changes its IP address – this could be something as simple as changing the IP address, a DHCP address change, or a change of the PIF (physical interface) used for management. In these cases, if the pool slave cannot find the master, it will go into emergency mode to protect the VMs. However, the problem this presents is that there are no network cards available on the slave, no management interface, and the VM’s which were running on that server (even if you’re using shared storage) are unavailable.

The resolution is very quick and simple…

First, verify that you are in emergency mode by running the following from the command line interface on the pool slave host “xe host-is-in-emergency-mode” – – if it returns TRUE then read on, if it returns FALSE then this will not resolve your problem.

Next, verify what the IP address is of your running POOL MASTER (this assumes your POOL MASTER is still running, otherwise you will need to perform an emergency transition)….

On the pool slave, run the following “xe pool-emergency-reset-master master-address=xxx.xxx.xxx.xxx” — where xxx.xxx.xxx.xxx is the IP address of your working pool master…

Upon success it will notify you it will make the change within 10 seconds….

After 10 seconds, run “xe host-is-in-emergency-mode” — if it returns false you should be all set. You may need to refresh (disconnect/reconnect) to the pool in XenCenter.

If your pool-master is unavailable, or all of your hosts are showing no network adapter, then you will need to transfer the master role to one of the servers, from the command line, run: “xe pool-emergency-transition-to-master”

That will make this host the new pool master. Return to the menu system “xsconsole” and document that IP address as the pool master, and then continue the documentation above.

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