vCPU-Based EC2 Instance Limit

01 Sign in to the AWS Management Console.

02 Navigate to Amazon EC2 console at https://console.aws.amazon.com/ec2/.

03 In the navigation panel, under Instances, choose Instances.

04 Click inside the Filter instances box located under the console top menu, choose Instance type, and select one of the instance types available in the list, used in the current AWS region. This filtering technique will help you to determine how many On-Demand instances are currently provisioned for the selected instance type. Repeat this step for each instance type used for On-Demand instances within the current AWS region.

05 In the navigation panel select Limits to access the page with the vCPU-based instance limits set for the current AWS region.

06 Choose Calculate vCPU limit to open the simplified vCPU calculator necessary to compute the total vCPU limit requirements for your AWS cloud account.

07 On the Limits Calculator page, use the Add instance type button to add each instance type identified at step no. 4. Enter the number of EC2 instances available for each identified instance type in the Instance count box. Once all the instance types are added to the calculator, compare the value available in the vCPUs needed column (i.e. the total number of vCPUs in use) with the value available in the Current limit column (i.e. the vCPU limit quota set for the selected AWS region). If the total number of vCPUs in use is going to reach soon the limit quota set for the current AWS region, follow the instructions provided in the Remediation section to request a vCPU limit increase from Amazon Web Services (AWS).

08 Change the AWS cloud region from the console navigation bar and repeat the audit process for other regions.

01 Run get-service-quota command (OSX/Linux/UNIX) with custom query filters to get the vCPU limit quota set for the On-Demand EC2 instances within the selected AWS region. The quota code used by Amazon Service Quotas for all the EC2 standard instances (instance type A, C, D, H, I, M, R, T and Z) is "L-1216C47A":

aws service-quotas get-service-quota
  --region us-east-1
  --service-code ec2
  --quota-code L-1216C47A
  --query 'Quota.Value'

02 The command output should return the vCPU limit quota configured for the selected AWS region:

32.0

03 Run describe-instances command (OSX/Linux/UNIX) with predefined and custom query filters to describe the instance type and the vCPU information for each running On-Demand EC2 instance provisioned in the selected AWS cloud region:

aws ec2 describe-instances
  --region us-east-1
  --filters "Name=instance-state-name,Values=running"
  --query 'Reservations[*].Instances[*].{"InstanceType": InstanceType,"CpuOptions": CpuOptions}'

04 The command output should return the vCPU information (the number of CPU cores per instance and the number of threads per CPU core) for each Amazon EC2 instance running in the selected AWS region:

[
	[
		{
			"InstanceType": "c5.4xlarge",
			"CpuOptions": {
				"CoreCount": 8,
				"ThreadsPerCore": 2
			}
		}
	],

	...

	[
		{
			"InstanceType": "c4.xlarge",
			"CpuOptions": {
				"CoreCount": 2,
				"ThreadsPerCore": 2
			}
		}
	]
]

05 Change the AWS cloud region by updating the --region command parameter value and repeat the audit process for other regions.

01 Sign in to AWS Management Console.

02 Navigate to Amazon Service Quotas dashboard at https://console.aws.amazon.com/servicequotas/.

03 In the navigation panel, under Service Quotas, choose Dashboard.

04 Select Amazon Elastic Compute Cloud (Amazon EC2) to access the default quotas configured for the Amazon EC2 service.

05 Select All Standard (A, C, D, H, I, M, R, T, Z) Spot Instance Requests from the Service quotas, then choose Request quota increase to initiate the quota request.

06 In the Request quota increase: Running On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances configuration box, enter the total amount of vCPUs, representing the new quota limit, in the Change quota value box, then choose Request to send your vCPU quota increase request to Amazon Web Services (AWS).

07 Some quota increase requests create an AWS Support Center case. To track the status of your vCPU quota increase request, perform the following actions:

1. Select Quota request history from the navigation panel, and click on the quota request link that you want to examine.
2. On the Request quota increase: Running On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances panel, click on the Support Center case number ticket number to access the support case details (including case status) available for your request.

08 Change the AWS cloud region from the console navigation bar and repeat the remediation process for other regions.

01 Run request-service-quota-increase command (OSX/Linux/UNIX) to request an increase for the number of vCPUs that can be used by On-Demand EC2 instances within the selected AWS region (i.e. vCPU-based instance limit). The quota code required by Amazon Service Quotas for the Amazon EC2 standard instances (instance type A, C, D, H, I, M, R, T and Z) is "L-1216C47A". Use the --desired-value command parameter to set the new quota limit based on your requirements:

aws service-quotas request-service-quota-increase
  --region us-east-1
  --service-code ec2
  --quota-code L-1216C47A
  --desired-value 96

02 The command output should return the new quota request configuration details:

{
	"RequestedQuota": {
		"QuotaName": "Running On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances",
		"Status": "PENDING",
		"DesiredValue": 96.0,
		"Created": 1571215789.939,
		"QuotaArn": "arn:aws:servicequotas:us-east-1:123456789012:ec2/L-1216C47A",
		"ServiceName": "Amazon Elastic Compute Cloud (Amazon EC2)",
		"GlobalQuota": false,
		"ServiceCode": "ec2",
		"QuotaCode": "L-1216C47A",
		"Requester": "{\"accountId\":\"123456789012\",\"callerArn\":\"arn:aws:sts::123456789012:assumed-role/ec2-manager/i-0abcdabcdabcdabcd\"}",
		"Id": "abcd1234abcd1234abcd1234abcd1234abcd1234",
		"Unit": "None"
	}
}

03 Some quota increase requests create automatically AWS Support Center cases. To retrieve the increase request status, run get-requested-service-quota-change command (OSX/Linux/UNIX) using the request ID returned at the previous step as the identifier parameter:

aws service-quotas get-requested-service-quota-change
  --region us-east-1
  --request-id abcd1234abcd1234abcd1234abcd1234abcd1234
  --query 'RequestedQuota.Status'

04 The command output should return the support case status (i.e. request status). If the request is pending the status should be set to "CASE_OPENED", otherwise the status should be "CASE_CLOSED":

"CASE_CLOSED"

05 Change the AWS cloud region by updating the --region command parameter value and repeat the remediation process for other regions.