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Thursday, January 14, 2010

PowerCLI: Copy-VMGuestFile

In VMware PowerCLI Update 1, a new cmdlet has been added to copy files to/from guest OS’s using the VMTools. Under normal circumstances this wouldn’t be all that useful, but if a machine is not accessible on the network – either a DMZ or a test-lab environment for example – there is now a method to easily copy files to and from the guest machines.

For example:

copy-vmguestfile -source c:\windows\system32\imageres.dll -destination c:\temp\ -vm vm01 -guesttolocal -hostuser root -hostpassword * -guestuser administrator -guestpassword *

Note that you need to specify the passwords, or not specify credentials at all for a prompt, or you can use a pscredential object.

Unfortunately wildcards are currently unsupported, but it would be easy to loop through local files within PowerShell to upload based on wildcards.

I ran this with the measure-command cmdlet to see how fast it was – about 0.5MB/sec– not too quick, but a lot better than nothing.

measure-command -expression {copy-vmguestfile -source c:\windows\system32\imageres.dll -destination c:\temp\ -vm vm01 -guesttolocal -hostuser root -hostpassword * -guestuser administrator -guestpassword *}

Seconds : 26
Milliseconds : 539
Ticks : 265390633
TotalDays : 0.000307165084490741
TotalHours : 0.00737196202777778
TotalMinutes : 0.442317721666667
TotalSeconds : 26.5390633
TotalMilliseconds : 26539.0633


Wayne's World of IT (WWoIT), Copyright 2010 Wayne Martin. 

4 comments:

Anonymous said...

Curious... If used to copy from one vm to another does this command use the network or is the copy process contained?

Anonymous said...

After rereading the post it appears no network connectivity is needed...awesome!

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I’ve worked in IT for over 20 years, and I know just about enough to realise that I don’t know very much.