Scaling master nodes vertically for OKD on AWS and vSphere

To perform vertical scaling of a master node for OKD, take the following steps:

  1. Stop the master nodes in AWS (EC2) or vSphere console.

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  2. Update resource configuration for the instance in AWS or vSphere console.

    1. For AWS:

      Change the type of the existing master instance in EC2 service. For example, from r5.2xlarge to r5.4xlarge.

      Such a change can only be done with instances of the same type.

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    2. For vSphere:

      Select the master virtual machine, which requires virtual hardware configuration change.

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  3. Run master nodes in AWS (EC2) or vSphere console.

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    Each master node must be configured separately, with an interval of 15-30 minutes.

  4. Check if the changes were properly applied in master nodes resources.

    View the configuration of current resources by applying master filter in Compute → Nodes section of OKD console.

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