Specifying EC2 keypair?

[David Bosschaert]

Hi all,

I'm creating nodes on EC2 with ComputeService.createNodesInGroup() and
would like to use a keypair provided by Amazon as a .pem file to
access it later.

I thought that I could do this by passing the content of the .pem file
into the EC2TemplateOptions like this:
 EC2TemplateOptions opts = EC2TemplateOptions.Builder
   .keyPair(keyPairString)

However, that gives me the following error message:
  "please use options.overrideLoginCredentialWith(rsa_private_text)
    at 
com.google.common.base.Preconditions.checkArgument(Preconditions.java:120)"

However that overrideLoginCredentialWith() method doesn't exist on the
EC2TemplateOptions.

Is there a way to use the key that I received as .pem file for nodes
that I create with ComputeService.createNodesInGroup()?

Thanks,

David