Secure enclosure systems in a provider network

A system, comprising:

• a plurality of secure containment enclosures, each secure containment enclosure configured to receive computing devices, and each secure containment enclosure including an access door and an electronic locking system to lock and unlock the access door;
• a computing device operable to execute an access controller configured to enable and disable the electronic locking systems of the rack access doors;
• and
• wherein the access controller is configured to prevent the electronic locking systems from opening while a computing device within the secure containment enclosure is powered on, as well as for a threshold period of time following powering off of all computing devices in the rack.

A method, comprising:

• causing an electronic locking system of a secure containment enclosure to lock an access door of the secure containment enclosure containing at least one electronic device;
• disabling the electronic locking system from unlocking the access door;
• based on a signal from a power sensor in a secure containment enclosure, determining that all electronic devices in the secure containment enclosure are in a low power state;
• starting a timer to count for a predetermined period of time;
• upon reaching the predetermined period of time, enabling the electronic locking system to be unlocked.