You run dedicated blogging instances for multiple customers on one GKE cluster and must ensure tenants can only access their own blog and not affect others. What's the appropriate platform configuration?

Deploying a namespace per tenant provides logical isolation, ensuring that each customer's resources (pods, services, etc.) are separated within the GKE cluster. Network Policies then enforce communication rules, preventing pods in one tenant's namespace from accessing or interfering with pods in another tenant's namespace. This combination effectively isolates tenants and prevents cross-tenant impact. Enabling Application-layer Secrets protects sensitive data but doesn't isolate tenants or prevent resource interference. GKE Audit Logging helps monitor activity but is a reactive measure, not a proactive isolation strategy. Binary Authorization ensures only trusted images are deployed but doesn't address tenant-level resource isolation or network communication control within the cluster.