1) The document proposes CAUS, an elasticity controller for containerized microservices that provisions resources based on current demand plus a buffer for anticipated future demand. 2) CAUS monitors arrival rates and provisions enough containers to handle the current rate plus 50% extra capacity as a threshold to anticipate spikes. 3) Test results found CAUS overprovisioned most of the time with less than two extra containers, and instances of underprovisioning did not result in high queue lengths when demand increased.