For more information about kubectl debug, see [Debugging Running Pods](https://kubernetes.io/docs/tasks/debug-application-cluster/debug-running-pod/) on the Kubernetes website, kubectl help debug, or reach out to SIG CLI by visiting [#sig-cli](https://kubernetes.slack.com/messages/sig-cli) or commenting on [enhancement #1441](https://features.k8s.io/1441).

### Removing deprecated flags in kubeadm

* Upgrade golang.org/x/net image to release-branch.go1.10 ([#70663](https://github.com/kubernetes/kubernetes/pull/70663), [@wenjiaswe](https://github.com/wenjiaswe))

 - reach GA, and deprecate the beta, or
 - have a new beta version _(and deprecate the previous beta)_.

- Fixed throughput when scheduling DaemonSet pods to reach 300 pods/s, if the configured QPS allows it. ([#124714](https://github.com/kubernetes/kubernetes/pull/124714), [@sanposhiho](https://github.com/sanposhiho))

* Upgrade golang.org/x/net image to release-branch.go1.10 ([#70663](https://github.com/kubernetes/kubernetes/pull/70663), [@wenjiaswe](https://github.com/wenjiaswe))

  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid
  linking directly to the master branch. This ensures that links reference a
  specific point in time, rather than a document that may change over time.
  

## Before Upgrading

Consider the following changes, limitations, and guidelines before you upgrade:

### **API Machinery**

- Kubeadm: ensured waiting for apiserver uses a local client that doesn't reach to the control plane endpoint and instead reaches directly to the local API server endpoint. ([#134269](https://github.com/kubernetes/kubernetes/pull/134269), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- Featuregate AllowInsecureBackendProxy graduates to GA and unconditionally enabled. ([#99658](https://github.com/kubernetes/kubernetes/pull/99658), [@deads2k](https://github.com/deads2k))
- Increase timeout for pod lifecycle test to reach pod status=ready ([#96691](https://github.com/kubernetes/kubernetes/pull/96691), [@hh](https://github.com/hh))

- Fix throughput when scheduling daemonset pods to reach 300 pods/s, if the configured qps allows it. ([#124753](https://github.com/kubernetes/kubernetes/pull/124753), [@sanposhiho](https://github.com/sanposhiho)) [SIG Scheduling]