1. A method comprising: receiving, by a server node, a communication from at least one computing node from a plurality of computing nodes, the communication comprising an indication of an address range of a requested segment of a boot image in non-volatile storage accessed by the server node; retrieving, by the server node, at least one patch to be applied to the requested segment in response to the communication from the at least one computing node; applying the at least one patch without changing the boot image in the non-volatile storage by forming, in volatile memory of the server node, an in-memory patched segment of the boot image without storing the patched segment to non-volatile memory; and responding, to the communication by sending at least the in-memory patched segment to the at least one computing node.