Failed to start the instance id-***** Insufficient capacity

Hi,

This means that AWS doesn't currently have enough available On-Demand capacity to complete your request. To resolve the issue, try the following:

• Wait a few minutes and then submit your request again.
• Submit a new request with a reduced number of instances.
• If you're launching an instance, submit a new request without specifying an Availability Zone.
• If you're launching an instance, submit a new request using a different instance type. You can resize at a later stage, if needed.
• Launching instances into a cluster placement group might cause an insufficient capacity error. For more information, see Working with placement groups.

More information here.

The g5 type instance is a GPU instance and requires vCPU quota.

AWS provides a default quota of 0 vCPUs for all G instances. This means that you can't create any G instances at all.

According to the official document, you need at least 4 vcpu to start the instance. I suggest you check your vCPU quota first.

Check service quota

It is useful to find out the current quota before requesting an increase. To do that, follow these steps:

1. Log into your AWS console.
2. Select the region you want to use. For example, us-east-1 (N. Virginia).
3. Search for Service Quotas.
4. Click AWS Services in the left sidebar.
5. Search for Amazon Elastic Compute Cloud (Amazon EC2).
6. Find the entry for Running On-Demand G and VT instances.

From the table above, it is clear that the default quota value is 0 vCPUs.

To request further quota increase, select the entry for Running On-Demand G and VT instances, and click Request quota increase.

Enter in the number of vCPUs you want to use. Let's say you want 2 Small GPU servers, you need request for 8 vCPUs.

Simply click on the Request button, and AWS will follow up with the request.

AWS will get back to you on the request, and increase the quota if there are no issues. There are similar steps to follow to increase the quota on other cloud services as well.

You can also take a look at using the "On-Demand Capacity Reservations" service. By creating Capacity Reservations, you ensure that you always have access to EC2 capacity when you need it, for as long as you need it. You can create Capacity Reservations at any time, without entering into a one-year or three-year term commitment, and the capacity is available immediately. When you no longer need it, cancel the Capacity Reservation to stop incurring charges. Please note that it is not a workaround if you’re actually hitting an Insufficient Capacity Error. Capacity reservations are useful when designing customer’s architecture in the beginning, so that you proactively reserve spots and never hit an Insufficient Capacity Error. For more information on this, please review our reference, link, here: - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-capacity-reservations.html