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Cloud Cost Guide Part 4: Step 3 - Build High-Availability using Clustered Hypervisors

Updated: Sep 19, 2023

Staying Up, Staying Strong

Welcome back to our blog series on reducing cloud costs through a DevOps-Enabled, Automated IT Infrastructure. We have already covered the importance of choosing a Dedicated Managed Server provider and installing a Virtualization Hypervisor. Today, we're moving onto the third step – establishing a cluster of Hypervisors in "high-availability" mode.


The first part of this step involves renting three machines for a total monthly cost of $750. After installing a Hypervisor on each of these machines, they are immediately turned into a virtualization cluster and configured in "high-availability" mode. In simple terms, this process makes those three machines function as one unit.


Why is this important? High-availability mode serves a crucial role in your infrastructure. If a key service running on one Hypervisor experiences an unexpected outage, the remaining Hypervisors will detect the disruption and promptly take over, minimizing potential downtime. This failover capability is critical to maintaining service continuity and avoiding costly interruptions.


Interruptions to Hypervisor operation can be either deliberate, such as for updates, or unintended due to technical issues. Having a cluster of three Hypervisors instead of two is a vital precaution against overload situations when one machine goes offline, and its services are transferred to the remaining Hypervisor.


This cluster forms the backbone of your infrastructure management, and it is where your infrastructure automation and orchestration system will be developed. In the upcoming steps, I will delve into the specific infrastructure tools needed for this cluster.


By establishing a high-availability cluster of Hypervisors, you'll be creating a robust and resilient IT infrastructure that can handle unexpected disruptions without causing major service outages. This step is crucial to ensuring that your infrastructure is not only efficient and cost-effective but also reliable and resilient.


In our next blog post, we'll discuss Step 4 – the installation of the OPNsense Firewall. This tool will act as the gateway to your data center, managing network segmentation for all your users and services.


Stay tuned as we continue our step-by-step journey towards efficient cloud cost management. Remember, each step you take brings you closer to a more streamlined, cost-effective, and efficient IT infrastructure. Let's keep moving forward!



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