Multi-Tenant SaaS on AKS: Namespace Isolation That Scales

Running multiple customers or product lines on one AKS cluster is cost-effective—but only if isolation is enforced by default. Namespaces provide logical separation; NetworkPolicies restrict pod-to-pod traffic; ResourceQuotas prevent noisy-neighbor CPU and memory exhaustion; and LimitRanges cap individual container requests.

For SaaS products, each tenant often gets a dedicated hostname routed through Front Door to a namespace-scoped Ingress. Identity flows through a central auth service; data stays in tenant-scoped databases or row-level security in shared Postgres. GitOps ensures tenant workloads are deployed from the same templates with environment-specific overlays.

cloudstrata implements multi-tenant AKS architectures for B2B platforms, balancing density with compliance requirements common in EU deployments. We document blast-radius assumptions, backup boundaries, and upgrade strategies so platform teams can add tenants without redesigning the cluster.