1. A computer program product for configuring and maintaining external monitoring of one or more instances of a virtual machine within a virtualized computing environment, the computer program product comprising: one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising: program instructions to monitor a hypervisor; program instructions to identify a first list, wherein the first list is comprised of one or more monitoring templates respectively associated with one or more virtual machine types; program instructions to maintain a second list comprised of a plurality of provisioned instances of virtual machines executing on the hypervisor, wherein the second list also includes a first set of information respectively associated with the plurality of provisioned instances of virtual machines, and wherein the first set of information respectively includes at least one of an ID, a state of a virtual machine, a virtual machine template, and a virtual machine type identified within the first list; program instructions to compile a third list comprised of monitored instances of provisioned virtual machines executing on the hypervisor, based, at least in part, on the first list and the second list, and wherein the list of monitored instances is respectively associated with one or more monitoring templates; in response to compiling the third list, program instructions to communicate with a monitoring system, wherein communicating includes, at least in part, program instructions to transmit the third list to the monitoring system; and in response to the monitoring system receiving the third list, program instructions to execute one or more functions to monitor the hypervisor based, at least in part, on the third list.