An example method of testing a cluster network for an application management system having a cluster of virtual machines (VMs) is described. The VMs execute on a virtualization layer in a cluster of hosts connected to a physical network, and the application management system integrated with the virtualization layer. The method includes: receiving, at an edge node from an external network, a plurality of test applications; executing, at the edge node, the plurality of test applications, the edge node connected to the cluster network, the plurality of test applications communicating, through the cluster network, with a master server of the application management system, and with applications executing in the VMs managed by the master server; and returning, from the edge node, responses generated by the plurality of test applications to the external network.