In case no actual designer weighs in ;-) ... for a lazy adaptation from the existing logos, I'd pick one of these:
https://commons.wikimedia.org/wiki/File:Wikidata_Logo_TMg_Hexagon_Cube.svg [my favorite] https://commons.wikimedia.org/wiki/File:Wikidata_Logo_TMg_Hexagon_Brackets.s... https://commons.wikimedia.org/wiki/File:Wikidata_Logo_TMg_Hexagon_3.svg
Overlapping squares/boxes are already pretty commonly used for VMs for obvious reasons, and the color scheme looks appropriately technical to me.
Compare: http://www.cloudave.com/wordpress/wp-content/uploads/2011/05/openstack-logo5... (OpenStack) http://www.thegeeksclub.com/wp-content/uploads/2011/08/vmware-logo.jpg (vmware) https://lh3.ggpht.com/-M7dKAt0AGL0/UFMmrYbrJDI/AAAAAAAAAr4/g_t4cVHVXKg/s1600... (VirtualBox)
HTH, Erik