### **Cluster Lifecycle**

* kube-apiserver now uses SSH tunnels for webhooks if the webhook is not directly routable from apiserver's network environment. ([#58644](https://github.com/kubernetes/kubernetes/pull/58644), [@yguo0905](https://github.com/yguo0905))

  
  When we switched to go-runner for building the apiserver,
  controller-manager, and scheduler server components, we no longer
  reference the individual architectures in the image names, specifically
  in the 'FROM' directive of the server image Dockerfiles.
  
  As a result, server images for non-amd64 images copy in the go-runner
  amd64 binary instead of the go-runner that matches that architecture.
  

 - [kube-log-runner](https://github.com/kubernetes/kubernetes/tree/master/staging/src/k8s.io/component-base/logs/kube-log-runner) is included in release tar balls. It can be used to replace the deprecated `--log-file` parameter. ([#106123](https://github.com/kubernetes/kubernetes/pull/106123), [@pohly](https://github.com/pohly))...

- When using the conformance test image, a new environment variable `E2E_USE_GO_RUNNER` will cause the tests to be run with the new golang-based test runner rather than the current bash wrapper. ([#79284](https://github.com/kubernetes/kubernetes/pull/79284), [@johnSchnake](https://github.com/johnSchnake))

  
  When we switched to go-runner for building the apiserver,
  controller-manager, and scheduler server components, we no longer
  reference the individual architectures in the image names, specifically
  in the 'FROM' directive of the server image Dockerfiles.
  
  As a result, server images for non-amd64 images copy in the go-runner
  amd64 binary instead of the go-runner that matches that architecture.
  

= vendor/github.com/stretchr/testify licensed under: =

MIT License

Copyright (c) 2012-2020 Mat Ryer, Tyler Bunnell and contributors.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

- `reflector_watches_total`

### Deprecated metrics

- `rest_client_request_latency_seconds` -> `rest_client_request_duration_seconds`
- `apiserver_proxy_tunnel_sync_latency_secs` -> `apiserver_proxy_tunnel_sync_duration_seconds`
- `scheduler_scheduling_latency_seconds` -> `scheduler_scheduling_duration_seconds`
- `kubelet_pod_worker_latency_microseconds` -> `kubelet_pod_worker_duration_seconds`

* Version-guard Kubectl client Guestbook application test against deployments ([#24478](https://github.com/kubernetes/kubernetes/pull/24478), [@ihmccreery](https://github.com/ihmccreery))
* Fix goroutine leak in ssh-tunnel healthcheck. ([#24487](https://github.com/kubernetes/kubernetes/pull/24487), [@cjcullen](https://github.com/cjcullen))

* Allow setting the Host header in a httpGet probe ([#24292](https://github.com/kubernetes/kubernetes/pull/24292), [@errm](https://github.com/errm))
* Fix goroutine leak in ssh-tunnel healthcheck. ([#24487](https://github.com/kubernetes/kubernetes/pull/24487), [@cjcullen](https://github.com/cjcullen))