Upgrade from single vCenter server on separate DC to Linked mode common SSO domain with external PSC solution

We use DR site and SRM for protection our applications like SAP. Both data center used to single node vCenter server witch server served all VMware component: vCenter Server, SSO, Inventory Service and Web Client. It was a separate sso domain. In this year we have upgraded our VMware infrastrucuture from 5.5 to 6.0 and SRM too.

The recommendation says use external PSC to SRM envinronment. So we had to upgrade single vCenter servers to external PSC environment. Becosuse we hade to this i would have liked to use common SSO domain and Enhanced Linked Mode. The usage of this architecture are easier for Administrators and anybody else.

So in this article i will write about how you can do that.

First of all look where is the bigining and what is our goul. The picture below you can see, at the begining. We had two separated vCenter server and we can upgrade this envinroment to a totally different architecture. External PSC, Common SSO and Enhanced Linked Mode. Let’s start.

Logical view
Logical view

Here is official doccumentation of supported upgrade path:

1 – Install two External PSC server each site (DC1 and DC2)
vCenter Server for Windows Requirements: http://pubs.vmware.com/vsphere-60/topic/com.vmware.vsphere.install.doc/GUID-F072712B-F568-4C3A-A4BC-EE6856D50CDA.html

2 – Install first PSC server on DC1





3 – Install the other PSC server witch are going to join to common SSO domain and part of link (vsphere.local)


In this point you can join to PSC1 domain, Select “Join a vCenter Single Sign-On domain” and fill the fields.
Click to “OK” button
Create a new site name, in this eg.: Site2 (eg.: use geographically separation like LA)
This is a summary tab where you can review the final settings

Ok, now we have two Platform Service Controller in common SSO domain, and Enhanced Linked Mode configuration. Next step is we can pin our vCenter Servers to PSC servers. Becouse we used to single vCenter solution, we decided to uninstall the vCenter server from Windows exept SQL DB, and reinstall only vCenter role. You will see steps of resintall below.

!!!! Before you uninstall your vCenter Server role from OS, export all users and permission settings. I recommend for you this VMware Kb Article: https://kb.vmware.com/kb/0000172

We don’t use complex permission system, therefore we handle this by manul solution.

4 – Install vCenter Server whitch will be pin to PSC1-DC2


Add Platform Service Controller server where want to pin this vCenter Server (in this example PSC1-DC2.domain.loc)
In our environment we use a dedicated local user for Service Account
This is the DSN created earlier. Type User/Pass for connection to SQL DB
This is a very IMPORTANT step!!! You CAN choose “NO” or else your vCenter DB will be erese.

5 – Install the other vCenter server to PSC1-DC1

I don’t show the same steps as above, i will show you the only one different witch is you can type the other Platform Service Controller FQDN or IP address.


I hope this article will help for your upgrade. If you have any question pls. don’t hesitate contact me!

Cisco UCS memory inventory by PowerShell

We upgraded our Cisco UCS environment, every host got extra memory from 128 to 256GB. Before we did it we had mesured CPU usage by VMware vRealize Operation Manager. It was a great help to this process. We ware able to proof the CPU performance will be ok with this memory size. We would have liked to incrase our VMware environment density.

We had to coolect every memory module serial numbers, and information about that witch chassis consist of witch memory modul.

We used to Cisco PowerShell for this task. Yes, exist PowerShell tool for Cisco UCS 🙂

You can download Cisco UCS Power Too pack (click link) and install your computer.
(You must restart your computer after install process)

Collect memory serial numbers, and UCS chassis information:

Get-UcsMemoryUnit | Export-Csv c:\tmp\UCS_Memory.csv -Encoding utf8

Get UCS chassis serials:

Get-UcsBlade | Export-Csv c:\tmp\UCS_Serials.csv -Encoding utf8

Whit this two Excel you are able to determine witch memory modul are witch chassis.