The multi-tenant data center market is expected to grow at a rapid CAGR of 11.36% between 2021 and 2026. Some of the growth drivers include the fast-expanding business processes spurring the demand for data centers that have resulted in the evolution of multi-tenant data centers.
Multi-tenant data centers refer to a software application being shared by multiple clients, including enterprises and cloud providers, at some level. Improved client servicing is one of the biggest advantages of being on a multi-tenant data center. It also enables:
However, data centers also can become rigid over a period of time and also present security concerns.
Amazon Elastic Kubernetes Service (Amazon EKS) is one of the popular orchestration platforms used by organizations moving towards a SaaS (software-as-a-service) model of delivery
One of the many advantages of EKS is that it provides multiple options for designing and creating a multi-tenant SaaS solution, though each comes with its own limitations. With each, the impact on the effort needed for implementation, cost efficiency, and operational complexity will vary
Some of the models that are available under EKS include:
Some of the key elements for running this environment include:
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Given these complexities and varieties, the effectiveness of AWS EKS can be improved by implementing the following best practices:
Best Practice #1: Create Separate Namespaces for Each Tenant
It is important for each client in a multi-tenant SaaS application to have a separate namespace to make dividing resources across multiple clients in a single cluster resource easy. The namespace is the primary isolation unit in Kubernetes for multi-tenant architecture and a core feature in Amazon EKS. This enables enforcing data privacy without having to create a separate cluster for each client, thereby reducing the cost of computing resources and AWS hosting.
Best Practice #2: Resource Consumption Management with ResourceQuota
In a multi-tenant SaaS application, multiple tenants access the same Kubernetes cluster resources parallelly. Disproportionately high usage of resources by one tenant can deprive others of access. With ResourceQuota, caps can be set on the resources that each container can use.
Best Practice #3: Network Policies for Network Isolation
Isolation is an essential requirement in a multi-tenant environment since the Kubernetes production cluster permits namespaces to interact with each other, which is to be avoided. Tenant isolation network policy and network segmentation on Amazon EKS using Calico on Amazon EKS can help assign network policies and effect the isolation.
Best Practice #4: PersistentVolume and PersistentVolumeClaim for Storage Isolation
For allocating storage resources too, Amazon EKS provides PersistentVolume (PV) for seamlessly assigning and managing storage for the tenants. PersistentVolumeClaim (PVC) allows a tenant to send a storage request. Being a namespaced resource, it helps isolate storage for different tenants easily.
Best Practice #5: Integrating IAM Integration with Amazon EKS for Access Management
EKS enables the administration of Role-Based Access Control (RBAC) by integrating with AWS IAM on a Kubernetes cluster. The AWS IAM authenticator authenticates the tenant namespace and defines access based on roles. In addition, ClusterRole and Role policy provisioning on the cluster can help adopt a tight security posture.
Indium Software is an authorized AWS partner with experience and expertise to facilitate building a secure and effective multi-tenant application using AWS Serverless/EKS. Our experts work closely with the client to understand their business requirements and data governance and security policies. In addition, we implement the best practices to help businesses derive optimum benefits from their SaaS applications.
By Uma Raj
By Uma Raj
By Abishek Balakumar
Indium Software is a leading digital engineering company that provides Application Engineering, Cloud Engineering, Data and Analytics, DevOps, Digital Assurance, and Gaming services. We assist companies in their digital transformation journey at every stage of digital adoption, allowing them to become market leaders.