urchase action in EC2 RI Optimizer fails with quota limit error

Products

• CloudHealth

Issue/Introduction

When using the EC2 RI Optimizer for making a purchase, you might see the purchase action fail with an error similar to the following:

Encountered error: Your current quota does not allow you to purchase the required number of reserved instances when attempting to purchase reservation: Partial Upfront for 11 r3.4xlarge(s)...

Cause

The error occurs because you have reached the quota limit that AWS assigns for certain instance types in a region for an account.

Resolution

Request your AWS representative increase your quota limits for those instance types in that region.