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Review this list of the required Amazon Web Service (AWS) service quotas that are required to run an Red Hat OpenShift Service on AWS cluster.

AWS Security Token Service (STS) is the recommended credential mode for installing and interacting with clusters on Red Hat OpenShift Service on AWS (ROSA) because it provides enhanced security.

Required AWS service quotas

The table below describes the AWS service quotas and levels required to create and run an Red Hat OpenShift Service on AWS cluster.

The AWS SDK allows ROSA to check quotas, but the AWS SDK calculation does not account for your existing usage. Therefore, it is possible that the quota check can pass in the AWS SDK yet the cluster creation can fail. To fix this issue, increase your quota.

If you need to modify or increase a specific quota, see Amazon’s documentation on requesting a quota increase. Large quota requests are submitted to Amazon Support for review, and take some time to be approved. If your quota request is urgent, contact AWS Support.

For On-Demand Standard (A, C, D, H, I, M, R, T, Z) Amazon EC2 instances, creating a ROSA cluster requires 100 vCPUs or greater. To request for your quota to be increased, open the Service Quotas console within the AWS console.

Table 1. ROSA-required service quota
Quota name Service code Quota code Default Minimum required Description

Running On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances

ec2

L-1216C47A

100

100

Maximum number of vCPUs assigned to the Running On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances.

The default value of 5 vCPUs is not sufficient to create ROSA clusters. ROSA has a minimum requirement of 100 vCPUs for cluster creation.

Storage for General Purpose SSD (gp2) volume storage in TiB

ebs

L-D18FCD1D

50

300

The maximum aggregated amount of storage, in TiB, that can be provisioned across General Purpose SSD (gp2) volumes in this Region.

Storage for General Purpose SSD (gp3) volume storage in TiB

ebs

L-7A658B76

50

300

The maximum aggregated amount of storage, in TiB, that can be provisioned across General Purpose SSD (gp3) volumes in this Region.

300 TiB of storage is the required minimum for optimal performance.

Storage for Provisioned IOPS SSD (io1) volumes in TiB

ebs

L-FD252861

50

300

The maximum aggregated amount of storage, in TiB, that can be provisioned across Provisioned IOPS SSD (io1) volumes in this Region.

300 TiB of storage is the required minimum for optimal performance.

Table 2. General AWS service quotas
Quota name Service code Quota code Default Minimum required Description

EC2-VPC Elastic IPs

ec2

L-0263D0A3

5

5

The maximum number of Elastic IP addresses that you can allocate for EC2-VPC in this Region.

VPCs per Region

vpc

L-F678F1CE

5

5

The maximum number of VPCs per Region. This quota is directly tied to the maximum number of internet gateways per Region.

Internet gateways per Region

vpc

L-A4707A72

5

5

The maximum number of internet gateways per Region. This quota is directly tied to the maximum number of VPCs per Region. To increase this quota, increase the number of VPCs per Region.

Network interfaces per Region

vpc

L-DF5E4CA3

5,000

5,000

The maximum number of network interfaces per Region.

Snapshots per Region

ebs

L-309BACF6

10,000

10,000

The maximum number of snapshots per Region

IOPS for Provisioned IOPS SSD (Io1) volumes

ebs

L-B3A130E6

300,000

300,000

The maximum aggregated number of IOPS that can be provisioned across Provisioned IOPS SDD (io1) volumes in this Region.

Application Load Balancers per Region

elasticloadbalancing

L-53DA6B97

50

50

Classic Load Balancers per Region

elasticloadbalancing

L-E9E9831D

20

20