A scalable cloud infrastructure serves two or more customers, where each customer is associated with at least one unit of virtual resources. The virtual resources are established by apportioning physical resources in the cloud infrastructure that are partitioned into pods within one or more zones in a scalable manner. Each pod comprises a strongly connected discrete set of physical resources in a zone. Additionally, the cloud infrastructure establishes one or more management server clusters each comprising one or more management servers. Each management server is configured for allocating the units of virtual resources to an account associated with each customer. The traffic from two or more customer accounts within the scalable cloud infrastructure is isolated and segmented.