Aws EC2 instance : Change type restricted

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I've got 2 t2.large instances which need to be upgrade to t2.xlarge. Problem is that t2.* is not available in the change type drop-list!

I created another instance - like the first one - , I can update to t2.xlarge. I added 2 EBS disk - like the first one -, I can update to t2.xlarge.

Any idea of what can limits the list of available type of instance in the drop-list?!

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amazon-web-servicesamazon-ec2changetype
It could be that the underlying host does not support t2.xlarge or has insufficient capacity to launch t2.xlarge instance. - krishna_mee2004
What is displayed in the Instance Type drop-down list? Is it empty? Does it only show some values? Can you show us a picture? This sounds very unusual. While the AMI type could restrict which families are available, it should always offer a choice within the same family. - John Rotenstein
@krishna_mee2004 Each host only runs one type of instance (eg t2.large). When an instance is Stopped (which is required to change Instance Type), there is no host being used, so there is no underlying host. - John Rotenstein
@krishna_mee2004, I was able to create new t2.xlarge on the same AZ. - GJE
@John Rotenstein, the list is not empty. All type were listed (m, c, r, d, i) excepted "T" ... Image was build from a marketplace AMI but I create a new one with the same configuration... on a t2.xlarge wihtout any problem :) I finally created an AMI of my instances and redeployed them on a t2.xlarge, but it could be interesting to find why it was not possible on existing instances. And new instances (next to image creation and redeployment) are able to change type for "t" types... - GJE

1 Answers