Why can't i use Elastic Inference in the regions mentioned in the Docs?

Question

It is mentioned in the AWS EI docs that we can use EI in US EAST, WEST, ASIA PACIFIC, EU. But when i launch an instance in ohio or Seoul, it shows this error

> 
```
Instance launch failed
The Availability Zone [us-east-2c] does not support Elastic Inference Accelerators. Choose another Availability Zone.

Launch log
Initializing requests
Succeeded
Launch initiation
Failed
```
Why is this happenging?? Is this a problem from my end?

Answer

It looks like elastic-inference.runtime endpoint zone support differs in each region, eg. us-east-1 supports zones: us-east-1b, c and d, but us-east-2 support only us-east-2a and b. Although I couldn't find any official documentation that confirms that.

Why can't i use Elastic Inference in the regions mentioned in the Docs?

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