Check instance capacity

Question

Is it possible to check how much instance capacity exists for a given region and AZ?

Use case: trying to determine the best instance types to choose to have the highest likelihood of reservation success.

Reduce seeing this: **X instance is out of capacity for y availability zone in us-west-2**

Answer

Hi

It  is not possible to check how much instance capacity exists for a given region and AZ on your end as this is internal information.

please consider reaching to AWS Support [1] for further assistance on this issue.

Reference link
1.AWS support- https://aws.amazon.com/contact-us/

Answer

How about using `describe-capacity-reservations` command?

https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/describe-capacity-reservations.html

> AvailableInstanceCount -> (integer)
>
> The remaining capacity. Indicates the number of instances that can be launched in the Capacity Reservation.

Filtering with --filters AZ is also available.

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