Felix version 2.2.0 - Rev libcalico-go to v1.2.1 for occupancy reduction and bug fixes. - Buffer the signal channel. (#1416) - Dump memory profile on receipt of SIGUSR1 (#1415) - Add support for failsafe UDP ports and allow DNS/DHCP by default. (#1412) - Felix is now built with Go v1.8.1 (#1446). - Move log writing to background threads to improve robustness if stdout/stderr blocks. (#1389) - Move conntrack rules to per-interface chains to avoid matching non-Calico packets. (#1424) - Squash duplicate host IP updates to avoid churning dataplane (#1445). - Disable node polling if IPIP is disabled (#1448). - Improvements to Kubernetes-based FV framework. - Add option to disable ctstate=INVALID rules for some corner cases/experiments. - Fix for spurious ERRORs around missing interfaces. - Fix felix_cluster_* metrics not being updated.