5 tips for dealing with Kubernetes Day 2 operational challenges • TechCrunch
Kubernetes is amazing but complex software can present significant challenges during “Day Two” when it goes into production.
Developers who are new to Kubernetes — and most — face a huge knowledge gap as they seek to maintain and optimize Kubernetes clusters.
In this section, I’ll share some ways to deal with problems as they arise.
Optimize your Kubernetes cluster for cost savings
As Kubernetes adoption increases, so does the need for applications and engineers to access clusters. However, always using the entire physical cluster to achieve this goal is neither feasible nor cost effective.
Virtual clusters are a great way to reduce costs. In a scenario of 100 developers, we calculated savings of up to 78% using open source virtual clusters.
Leverage virtual clusters with open source software like virtual cluster or vcluster allows Kubernetes operators to run multiple virtual clusters in a single physical cluster, thereby increasing the lease time of each cluster. By using computing resources through this more generic approach, organizations can save on compute costs instead of running entirely separate Kubernetes clusters.
Strengthen tenant isolation
By leveraging policy tools, software security barriers can be deployed on your cloud-based Kubernetes infrastructure.
Another great benefit of virtual clusters is that they are isolated from other users on the cluster. This gives each user their own workspace that looks exactly like a physical Kubernetes cluster.
In addition, virtual clusters allow a tighter form of multitasking than namespace-based multitasking. One of the main concerns with namespace-based multitasking is that it cannot accommodate cluster-scoped resources. Many applications must create or at least access cluster-scoped resources such as nodes, cluster roles, persistent drives, and storage layers.
Virtual clusters also provide security benefits by increasing isolation in multi-tenant clusters through:
- Completely isolated from the control plane.
- Domain Name System (DNS) isolation.
- Resources are created on a single namespace.
Organizations looking for a solution for multi-tenant applications that provide better isolation for resources shared between their clusters should consider virtual clusters as an option. In addition to being cost-effective and simpler to deploy, they are also easier to manage than physical clusters.