Offline performance of the CMS Tracker during early Run II

The CMS tracker is an all-silicon detector operating in the high-radiation environment presented by particle collisions in the LHC. This document discusses the early run II performance of both subcomponents, the Pixel and the Strip detectors. After a general presentation of the tracker, we detail the main modifications that were performed during the LHC first long shutdown and the commissioning operations that took place at the beginning of 2015. The status of the detector at the beginning of data taking is also reviewed and first results are presented to assess the readiness of this detector for run II