- Metrics can now be disabled explicitly via a command line flag (i.e. '--disabled-metrics=metric1,metric2') ([#99217](https://github.com/kubernetes/kubernetes/pull/99217), [@logicalhan](https://github.com/logicalhan))

* Sharing a PID namespace between containers in a pod is disabled by default in 1.8. To enable for a node, use the --docker-disable-shared-pid=false kubelet flag. Note that PID namespace sharing requires docker >= 1.13.1. ([#51634](https://github.com/kubernetes/kubernetes/pull/51634), [@verb](https://github.com/verb))

### Bug or Regression

- Fix pod restart after node reboot when NewVolumeManagerReconstruction feature gate is enabled and SELinuxMountReadWriteOncePod disabled ([#124142](https://github.com/kubernetes/kubernetes/pull/124142), [@bertinatto](https://github.com/bertinatto)) [SIG Node]

    * Fix detect exceptions plugin to analyze message field instead of log field.
    * Fix detect exceptions plugin to analyze streams based on local resource id.
    * Disable the metadata agent for monitored resource construction in logging.
    * Disable timestamp adjustment in logs to optimize performance.
    * Reduce logging agent buffer chunk limit to 512k to optimize performance.

### Bug or Regression

- Fix pod restart after node reboot when NewVolumeManagerReconstruction feature gate is enabled and SELinuxMountReadWriteOncePod disabled ([#124141](https://github.com/kubernetes/kubernetes/pull/124141), [@bertinatto](https://github.com/bertinatto)) [SIG Node]

  * Fix incorrect CPU usage with 4.7 kernel
  * OOM parser uses kmsg
  * Add hugepages support
  * Add CRI-O support

* Sharing a PID namespace between containers in a pod is disabled by default in version 1.8. To enable for a node, use the `--docker-disable-shared-pid=false` kubelet flag. Be aware that PID namespace sharing requires Docker version greater than or equal to 1.13.1.

* Fix issues related to the eviction manager.

resource version.  Previously when listing resources that had the watch cache disabled clients could retrieve a snapshot at that exact resource version.  If the client requests a resource version newer than the current state, a TimeoutError is returned suggesting the client retry in a few seconds.  This behavior is now consistent for both single item retrieval and list calls, and for when the watch cache is enabled or disabled. ([#72170](https://github.com/kubernetes/kubernetes/pull/72170), [@jpbetz...

- Disable watchcache for events.k8.io/Event resource for compatibility with core/Event. ([#96117](https://github.com/kubernetes/kubernetes/pull/96117), [@wojtek-t](https://github.com/wojtek-t)) [SIG Scalability]

* The `PersistentVolumeLabel` admission controller is now disabled by default. If you depend on this feature (AWS/GCE) then ensure it is added to the `--enable-admission-plugins` flag on the kube-apiserver. ([#64326](https://github.com/kubernetes/kubernetes/pull/64326), [@andrewsykim](https://github.com/andrewsykim))

    * Fix detect exceptions plugin to analyze message field instead of log field.
    * Fix detect exceptions plugin to analyze streams based on local resource id.
    * Disable the metadata agent for monitored resource construction in logging.
    * Disable timestamp adjustment in logs to optimize performance.
    * Reduce logging agent buffer chunk limit to 512k to optimize performance.