{"id":97,"date":"2008-12-01T17:34:48","date_gmt":"2008-12-01T16:34:48","guid":{"rendered":"http:\/\/www.amikkelsen.com\/?p=97"},"modified":"2008-12-20T23:36:45","modified_gmt":"2008-12-20T22:36:45","slug":"bulk-upgrading-vms-memory","status":"publish","type":"post","link":"https:\/\/www.amikkelsen.com\/?p=97","title":{"rendered":"BULK upgrading VM’s memory"},"content":{"rendered":"

Today I had to upgrade all our Jumphost VM’s from 256MB to 512MB of memory (more than 200 VM’s<\/span><\/span>).
\nThere are two ways accomplice this.<\/p>\n

1. <\/span><\/span><\/span>Do it manually (Very time consuming)<\/span><\/p>\n

2. <\/span><\/span><\/span>Script it with PowerShell<\/span><\/p>\n

<\/span><\/p>\n

As the lazy person I am I decided that scripting was the way forward.
\nThe script I came up with is as follows:<\/span>\n<\/p>\n

<\/span><\/p>\n

Connect-VIServer \"vi_servername\" -User \"vi_username\" -Password password\"\r\n\r\n<\/span><\/pre>\n
# Select all VM's that have less than 512MB and change the Memory to 512MB<\/span><\/pre>\n
foreach ($vm in Get-VM | Select Name,MemoryMB | Where-Object{$_.MemoryMB -lt \"512\"}){<\/span><\/pre>\n
Set-VM $vm.Name -MemoryMB \"512\" -Confirm:$FALSE<\/span><\/pre>\n
}<\/span><\/pre>\n
 <\/span><\/p>\n
To suppress the script to prompt for acceptance each time I added the following option<\/span>
\n-Confirm:$FALSE<\/span><\/p>\n
The script easily be changed to add or update other VM hardware settings.
\n– Number of CPU’s <\/span>(Set-VM  <\/span><vm-name> -NumCpu 2)<\/span>\n<\/p>\n
– Rename VM <\/span> <\/span>(Set-VM  <\/span><vm-name> -Name “NewName”)<\/span><\/p>\n
\n
Find more options and ideas in the “Automating VMware with PowerShell – Hands-On Lab<\/a>” from VMworls 2008.<\/span><\/p>\n
Just remember if a VM is running you have to poweroff or shutdown the VM before the changes will take effect.
\nThis is because a restart or reset does’t reload the vmx file.<\/span>\n<\/p>\n
Update:<\/strong><\/p>\n
The script is now updates so it also implements the following settings<\/p>\n