An architect recently deployed a multizone Red Hat OpenShift cluster on IBM Cloud.

Autoscaling enables automatic scaling of resources in response to demand or failure events, ensuring that a multizone Red Hat OpenShift cluster on IBM Cloud can dynamically spin up worker nodes in another data center if one becomes unavailable. Autoscaling allows for maintaining service availability without human intervention, thus achieving the required resiliency.

How Autoscaling Works:Autoscaling automatically adjusts the number of worker nodes in a cluster based on predefined metrics such as CPU usage, memory usage, or other health checks. In the event of a zone failure, it can scale out to other available zones to maintain service continuity.

Importance of Autoscaling for Resiliency:By automatically provisioning new resources when needed, autoscaling reduces the risk of downtime and ensures consistent application performance.

Comparison with Other Options:

A (Load balancing):Distributes traffic but does not scale resources.

B (Network forwarding):Related to network routing, not scaling resources.

D (Init-node script automation):Involves initial setup, not dynamic scaling.

References:

IBM Cloud Kubernetes Service Autoscaling

IBM Cloud OpenShift Documentation

IBM Cloud Architect Exam Study Guide

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