What is claimed is:1. A device, comprising:a system board;a bay to receive a pluggable module such that the pluggable module is electrically connecting to the system board; anda cold plate assembly comprising:a cold plate to transfer heat to liquid coolant;a pivoting support that supports the cold plate and pivots relative to the system board;an engagement mechanism comprising a mechanical linkage with a mechanical advantage attached to the pivoting support such that moving a link of the mechanical linkage causes the pivoting support to pivot between an engaged position and a disengaged position; andradial springs connecting the cold plate to the pivoting support,wherein each of the radial springs allows the cold plate to translate in two dimensions relative to the pivoting support and to rotate around an axis of the cold plate and provides a restoring spring force responsive to the cold plate moving relative to the pivoting support,wherein, if the pivoting support is in the engaged position and the pluggable module is installed in the bay, the cold plate is in contact with a thermal interface of the pluggable module, andif the pivoting support is in the disengaged position and the pluggable module is installed in the bay, the cold plate is not in contact with the thermal interface of the pluggable module.2. The device of claim 1,wherein the engagement mechanism includes an electrical actuator connected to the mechanical linkage and configured to cause the pivoting support to move between the engaged position and the disengaged position by moving the link.3. The device of claim 2, comprising:control circuitry configured to, responsive to the pluggable module being installed in the bay, automatically control the electrical actuator to move the pivoting support into the engaged position.4. The device of claim 3,wherein the control circuitry is configured to automatically detect whether the pluggable module is installed in the bay by monitoring a signal from an electrical connector of the bay.5. The device of claim 3,wherein the control circuitry is to, responsive to an eject request, control the electrical actuator to move the pivoting support into the disengaged position.6. The device of claim 2,wherein the electrical actuator includes a solenoid.7. The device of claim 1, comprising:a locking pin connected to the pivoting support and configured to, when the pivoting support is in the engaged position and the pluggable module is installed in the bay, engage with the pluggable module to prevent removal of the pluggable module from the bay.8. The device of claim 1,wherein the engagement mechanism includes an engagement lever connected to the mechanical linkage and extending outside of the bay to allow manual actuation.9. The device of claim 8,wherein the engagement lever includes curtain tabs to interact with tabs of the pluggable module to prevent actuation of the engagement lever if the pluggable module is in the bay and is not yet electrically engaged with an electrical connector of the bay.10. The device of claim 1, comprising:a second bay to receive a second pluggable module;wherein the cold plate assembly includes a second cold plate that is connected to the pivoting support such that, when the pivoting support is in the engaged position, the second cold plate is located such that would be in contact with a thermal interface of the second pluggable module if the second pluggable module were installed in the second bay.11. The device of claim 10,wherein the engagement mechanism includes an engagement lever connected to the mechanical linkage and extending outside of the bay.12. A method, comprising:providing the device of claim 1;inserting the pluggable module into the bay; andcausing the pivoting support move into the engaged position, wherein each of the radial springs allows the cold plate to translate in two dimensions relative to the pivoting support and to rotate around an axis of the cold plate and provides a restoring spring force responsive to the cold plate moving relative to the pivoting support.13. A computing system, comprising:the device of claim 1; andthe pluggable module.14. The computing system of claim 13,wherein the pluggable module includes an electro-optical transceiver.
