Chapter 7. Creating a private cluster on Red Hat OpenShift Service on AWS

• Configure a virtual private cloud (VPC)
• Create account-wide roles
• Create the ocm-role IAM role
• Create an OIDC configuration
• Create Operator roles

Prerequisites

• You have an AWS account.
• You have Red Hat Organization Administrator privileges in the OpenShift Cluster Manager organization.
• You have the permissions required to install AWS account-wide roles.
• You have installed and configured the latest ROSA CLI, rosa, on your installation host.

Procedure

• Run one of the following commands to create the required ocm-role IAM resource:

  Important

  The process to change your ocm-role IAM resource profile requires you to unlink and delete the current ocm-role IAM resource and create a new one with the required profile.

  • To create an ocm-role IAM role with standard privileges, run the following command:

    $ rosa create ocm-role

  • To create an ocm-role IAM role with admin privileges, run the following command:

    Important

    The admin profile supports "auto" mode configuration for Red Hat OpenShift Service on AWS clusters which provisions OIDC Configuration and Operator roles automatically. To achieve this automatic flow, the profile has a wider set of permissions than the standard profile.

    $ rosa create ocm-role --admin

    This command allows you to create the role by specifying specific attributes. The following example output shows the "auto mode" selected, which lets the ROSA CLI (rosa) create your Operator roles and policies. See "Methods of account-wide role creation" for more information. The following example shows what your creation flow might look like.

    I: Creating ocm role
    ? Role prefix: ManagedOpenShift
    ? Enable admin capabilities for the OCM role (optional): No
    ? Permissions boundary ARN (optional):
    ? Role Path (optional):
    ? Role creation mode: auto
    I: Creating role using 'arn:aws:iam::<ARN>:user/<UserName>'
    ? Create the 'ManagedOpenShift-OCM-Role-182' role? Yes
    I: Created role 'ManagedOpenShift-OCM-Role-182' with ARN  'arn:aws:iam::<ARN>:role/ManagedOpenShift-OCM-Role-182'
    I: Linking OCM role
    ? OCM Role ARN: arn:aws:iam::<ARN>:role/ManagedOpenShift-OCM-Role-182
    ? Link the 'arn:aws:iam::<ARN>:role/ManagedOpenShift-OCM-Role-182' role with organization '<AWS ARN>'? Yes
    I: Successfully linked role-arn 'arn:aws:iam::<ARN>:role/ManagedOpenShift-OCM-Role-182' with organization account '<AWS ARN>'

    where:

    Role prefix

    A prefix value for all of the created AWS resources. In this example, ManagedOpenShift prepends all of the AWS resources.

    Enable admin capabilities for the OCM role (optional)

    Choose if you want this role to have the additional admin permissions.

    Note

    You do not see this prompt if you used the --admin option.

    Permissions boundary ARN (optional)

    The Amazon Resource Name (ARN) of the policy to set permission boundaries.

    Role Path (optional)

    Specify an IAM path for the user name.

    Role creation mode

    Choose the method to create your AWS roles. By using auto, the ROSA CLI generates and links the roles and policies. In the auto mode, you receive some different prompts to create the AWS roles.

    Create the 'ManagedOpenShift-OCM-Role-182' role?

    The auto method asks if you want to create a specific ocm-role by using your prefix.

    OCM Role ARN

    Confirm that you want to associate your IAM role with your OpenShift Cluster Manager.

    Link the 'arn:aws:iam::<ARN>:role/ManagedOpenShift-OCM-Role-182' role with organization '<AWS ARN>'?

    Links the created role with your AWS organization.

  • To create an ocm-role IAM role with the minimum required privileges, run the following command:

    Note

    While the no-console profile offers the minimum permissions policy that can still create Red Hat OpenShift Service on AWS clusters, the permissions are insufficient if you want to use OpenShift Cluster Manager for cluster creation.

    $ rosa create ocm-role --no-console

Prerequisites

• You have available AWS service quotas.
• You have enabled the Red Hat OpenShift Service on AWS in the AWS Console.
• You have installed and configured the latest version of the ROSA CLI on your installation host.

Prerequisites

• Your corporate network or other VPC has connectivity.
• You have permission to create and attach security groups within the VPC.