New Earth by M.R. Forbes – Kindle Edition

Two centuries ago, humanity launched its greatest achievement: a ship carrying ten thousand colonists and a payload of self-replicating machines programmed to tame a distant world. By the time the passengers opened their eyes, the planet would be ready. A new Earth, assembled and perfected.
But two hundred years is a long time for machines to be left to their own devices.
He wakes drowning, with no name and no memory. Around him, a vault of sleepers stacked into the darkness. Something banging its way through the racks. And the first human he meets tries to kill him.
No help. No answers. Just one certainty:
This isnt the world he was promised.