An error occurred (MaxSpotInstanceCountExceeded) when calling the RequestSpotInstances operation: Max spot instance count exceeded

Question

I am using the CLI and sending in this command:

aws ec2 request-spot-instances   --spot-price "0.0835"   --instance-count 1   --launch-specification file://launch-specification.json

This is my launch-specification.json:

{
  "ImageId": "ami-051f7e7f6c2f40dc1",
  "InstanceType": "t2.2xlarge",
  "IamInstanceProfile": {
    "Arn": "arn:aws:iam::040137372175:instance-profile/ec2-s3-instance-profile"
  },
  "UserData": "IyEvYmluL2Jhc2gKYXdzIHMzIGNwIHMzOi8vYWR2YW4tY29kZS9jb2RlX3BhY2thZ2UuemlwIC9ob21lL2VjMi11c2VyLwp1bnppcCAvaG9tZS="
}

I keep getting the error that I've maxed out my spot instances.

I don't have any spot instances running and my service level quotas says I can do up to 5 and have used none.

I don't know why I get this error.  Anybody know why?

Riku_Kobayashi · Accepted Answer

Hello.

The vCPU for t2.2xlarge is 8.  
The error is due to the spot instance's vCPU default quota of 5 being exceeded.  
The service quota for spot instances is limited by the number of vCPUs, not the number of instances.  
Please apply for an increase in the limit from the service quota.  
https://docs.aws.amazon.com/general/latest/gr/ec2-service.html  
> The maximum number of vCPUs for all running or requested Standard (A, C, D, H, I, M, R, T, Z) Spot Instances per Region

The number of vCPUs for each instance type can be found in the following document.  
https://aws.amazon.com/ec2/instance-types/?nc1=h_ls

Also, I don't think this has anything to do with this case, but I will share it with you just in case.  
The use of "--spot-price" is discouraged because it increases the likelihood of stoppages.  
https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/request-spot-instances.html  
> --spot-price (string)
> 
> The maximum price per unit hour that you are willing to pay for a Spot Instance. We do not recommend using this parameter because it can lead to increased interruptions. If you do not specify this parameter, you will pay the current Spot price.

An error occurred (MaxSpotInstanceCountExceeded) when calling the RequestSpotInstances operation: Max spot instance count exceeded

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