There is a good chance that you won’t need to make any system changes to handle the new format. The new identifier format will follow the pattern of the current identifier format, but it will be longer.
Q: What will the new identifier format look like? This opt-in changes the ID format for all remaining EC2 resource types. In 2016, we moved to the longer ID format for Amazon EC2 instances, reservations, volumes, and snapshots only. Q: I already opted in for longer IDs last year. All Amazon EC2 resource IDs will change to the longer format in July 2018. In order to enable the long-term, uninterrupted creation of new resources, we need to introduce a longer ID format. Given how fast Amazon Web Services continues to grow, we will start to run low on IDs for certain resources in 2018. Please visit this documentation for instructions. During this time, you can choose which ID format resources are assigned and update your management tools and scripts to add support for the longer format. Through the end of June 2018, customers will have the ability to opt-in to use longer IDs. Instances and volumes already use this ID format.
The new format will only apply to newly created resources your existing resources won’t be affected. Starting July 2018, all newly created EC2 resources will receive longer format IDs.
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