Autoscaler API: the resource metrics API, custom metrics API, and
metrics-server, which is the new replacement for Heapster in the default monitoring
pipeline.

[SIG Instrumentation]: https://github.com/kubernetes/community/tree/master/sig-instrumentation

### SIG Multi-cluster (formerly known as SIG Federation)

### Structured Logging in Kubelet

Kubelet has adopted structured logging, thanks to community effort in accomplishing this within the release timeline. Structured logging in the project remains an ongoing effort -- for folks interested in participating, [keep an eye / chime in to the mailing list discussion](https://groups.google.com/g/kubernetes-dev/c/y4WIw-ntUR8).