* fluentd-gcp resources can be modified via a ScalingPolicy. ([#59657](https://github.com/kubernetes/kubernetes/pull/59657), [@x13n](https://github.com/x13n))

### SIG-scheduling

SIG Scheduling development efforts have been primarily focused on improving performance and reliability of the scheduler.
- Performance of the inter-pod affinity/anti-affinity feature is improved over 100X via algorithmic optimization.

* Affinity in annotations alpha feature is no longer supported in 1.8. Anyone upgrading from 1.7 with AffinityInAnnotation feature enabled must ensure pods (specifically with pod anti-affinity PreferredDuringSchedulingIgnoredDuringExecution) with empty TopologyKey fields must be removed before upgrading to 1.8. ([#49976](https://github.com/kubernetes/kubernetes/pull/49976), [@aveshagarwal](https://github.com/aveshagarwal))

* Bugfix for erroneous upgrade needed messaging in kubernetes worker charm. ([#60873](https://github.com/kubernetes/kubernetes/pull/60873), [@wwwtyro](https://github.com/wwwtyro))
* Fix inter-pod anti-affinity check to consider a pod a match when all the anti-affinity terms match. ([#62715](https://github.com/kubernetes/kubernetes/pull/62715), [@bsalamat](https://github.com/bsalamat))

- Kubeadm: support experimental JSON/YAML output for `kubeadm upgrade plan` with the `--output` flag. ([#108447](https://github.com/kubernetes/kubernetes/pull/108447), [@pacoxu](https://github.com/pacoxu))
- Kubeadm: the preferred pod anti-affinity for CoreDNS is now enabled by default. ([#110593](https://github.com/kubernetes/kubernetes/pull/110593), [@SataQiu](https://github.com/SataQiu))

- **[beta]** [Node affinity/anti-affinity](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/) and **[beta]** [pod affinity/anti-affinity](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/). Node affinity/anti-affinity allow you to specify rules for restricting which node(s) a pod can schedule onto, based on the labels on the node. Pod affinity/anti-affinity allow you to specify rules for spreading and packing pods relative...

- **Stateful Application Support**
  - Enhanced persistence capabilities (eg: `StorageClasses`, new volume plugins)
  - New resources and scheduler features (eg: `ScheduledJob` resource, pod/node affinity/anti-affinity)
- **Cluster Federation**
  - Global Multi-cluster HTTP(S) Ingress across GCE and GKE clusters.
  - Expanded support for federated hybrid-cloud resources including ReplicaSets, Secrets, Namespaces and Events.

* fix cinder volume dir umount issue [#24717](https://github.com/kubernetes/kubernetes/pull/24717) ([#24718](https://github.com/kubernetes/kubernetes/pull/24718), [@chengyli](https://github.com/chengyli))
* Inter pod topological affinity and anti-affinity implementation ([#22985](https://github.com/kubernetes/kubernetes/pull/22985), [@kevin-wangzefeng](https://github.com/kevin-wangzefeng))

### Scheduling