Examples described herein include imaging servers which may support asynchronous imaging of one or more computers (e.g., computing nodes). The imaging server may use out-of-band communication to install requested images on one or more computing nodes. The imaging server may support multiple concurrent installation sessions, and may maintain a log specific to each session. This may facilitate session-specific status reporting. In this manner, operating systems, hypervisors, or other software may be installed on computing nodes.