* Fix instance metadata service URL. ([#49081](https://github.com/kubernetes/kubernetes/pull/49081), [@brendandburns](https://github.com/brendandburns))

- Fixes a regression in kubectl and client-go discovery when configured with a server URL other than the root of a server. ([#117686](https://github.com/kubernetes/kubernetes/pull/117686), [@ardaguclu](https://github.com/ardaguclu)) [SIG API Machinery]

pkg net, const FlagRunning = 32 #53482
pkg net, const FlagRunning Flags #53482
pkg net/http, func NewResponseController(ResponseWriter) *ResponseController #54136
pkg net/http/httputil, method (*ProxyRequest) SetURL(*url.URL) #53002
pkg net/http/httputil, method (*ProxyRequest) SetXForwarded() #53002
pkg net/http/httputil, type ProxyRequest struct #53002
pkg net/http/httputil, type ProxyRequest struct, In *http.Request #53002

\"${config}\"`)\n        }\n\n        data[config]()\n      }\n    })\n  }\n}\n\n/**\n * Data API implementation\n */\n\n$(document).on(EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {\n  // preventDefault only for <a> elements (which change the URL) not inside the collapsible element\n  if (event.currentTarget.tagName === 'A') {\n    event.preventDefault()\n  }\n\n  const $trigger = $(this)\n  const selector = Util.getSelectorFromElement(this)\n  const selectors = [].slice.call(document.query...

* kubeadm alpha certs command now skip missing files ([#85092](https://github.com/kubernetes/kubernetes/pull/85092), [@fabriziopandini](https://github.com/fabriziopandini))

* fix parse devicePath issue on Azure Disk ([#74499](https://github.com/kubernetes/kubernetes/pull/74499), [@andyzhangx](https://github.com/andyzhangx))
* kubeadm: fixed nil pointer dereference caused by a bug in url parsing ([#74454](https://github.com/kubernetes/kubernetes/pull/74454), [@bart0sh](https://github.com/bart0sh))

pkg io/fs, var SkipDir error
pkg log, func Default() *Logger
pkg net, var ErrClosed error
pkg net/http, func FS(fs.FS) FileSystem
pkg net/http, type Transport struct, GetProxyConnectHeader func(context.Context, *url.URL, string) (Header, error)
pkg os, const ModeAppend fs.FileMode
pkg os, const ModeCharDevice fs.FileMode
pkg os, const ModeDevice fs.FileMode
pkg os, const ModeDir fs.FileMode
pkg os, const ModeExclusive fs.FileMode

- Kubeadm: when adding new control plane nodes with "kubeadm join", ensure that the etcd member addition is performed only if a given member URL does not already exist in the list of members. Similarly, on "kubeadm reset" only remove an etcd member if its ID exists. ([#127621](https://github.com/kubernetes/kubernetes/pull/127621), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]...

* [fluentd-gcp addon] Use the logging agent's node name as the metadata agent URL. ([#63353](https://github.com/kubernetes/kubernetes/pull/63353), [@bmoyles0117](https://github.com/bmoyles0117))

## Changelog since v1.12.5

### Other notable changes

* kubeadm: fixed nil pointer dereference caused by a bug in url parsing ([#74454](https://github.com/kubernetes/kubernetes/pull/74454), [@bart0sh](https://github.com/bart0sh))