Automatic merge from submit-queue (batch tested with PRs 53895, 58013, 58466, 58531, 58535). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
[kubeadm] Bump kube-dns to 1.14.8
**What this PR does / why we need it**:
Bump kube-dns to 1.14.8 for kubeadm. Ref https://github.com/kubernetes/kubernetes/pull/57918.
cc @rramkumar1
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #NONE
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Improve error messages and comments in KubeAdm.
**What this PR does / why we need it**:
Improve error messages and comments in KubeAdm.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 57139, 57358). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
kubeadm upgrade: fix unit test flake
The CA generated for each test case is global and the cases modify
the expiry. This can flake depending on what order the tests run.
Generate a new CA for each test case.
```release-note
NONE
```
Fixes https://github.com/kubernetes/kubernetes/issues/57357
/cc @kubernetes/sig-cluster-lifecycle-bugs
/cc @xiangpengzhao
/cc @luxas
The CA generated for each test case is global and the cases modify
the expiry. This can flake depending on what order the tests run.
Generate a new CA for each test case.
Automatic merge from submit-queue (batch tested with PRs 55939, 56007). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
fix bad return error text
**What this PR does / why we need it**:
fix bad return error text
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 51192, 55010). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Adding etcd upgrade option to kubeadm upgrade apply
This PR adds etcd upgrade functionality to kubeadm upgrade apply.
First commit adds certain functions to be able to deal with a single component of control plane and not just with all three components (apiserver, controller-manager and scheduler). It adds granularity as a result code can be reused.
Closes: https://github.com/kubernetes/kubeadm/issues/490
```release-note
Adds to **kubeadm upgrade apply**, a new **--etcd-upgrade** keyword. When this keyword is specified, etcd's static pod gets upgraded to the etcd version officially recommended for a target kubernetes release.
```
Automatic merge from submit-queue (batch tested with PRs 55648, 55274, 54982, 51955, 55639). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
kubeadm:Clean up no longer used k8sVersion param
**What this PR does / why we need it**:
cleanup for kubeadm.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
**Special notes for your reviewer**:
/cc @luxas
**Release note**:
```release-note
NONE
```
~~`kubeadm join` now requires the `--discovery-token-ca-cert-hash` argument to be set, or the `--discovery-token-unsafe-skip-ca-verification` flag to be set for opting out of the CA pinning feature.~~
Automatic merge from submit-queue (batch tested with PRs 53337, 55465, 55512, 55522, 54554). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Wording in missing config from cluster response typo.
**What this PR does / why we need it**:
Resolves a typo in the response message for Kubeadm Upgrade Plan that results in the wording:
"Without this information, 'kubeadm upgrade' don't how to configure your upgraded cluster."
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:
none
**Special notes for your reviewer**:
none
**Release note**:
```release-note
Correct wording of kubeadm upgrade response for missing ConfigMap.
```
Automatic merge from submit-queue (batch tested with PRs 54160, 54016). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Fix `kubeadm upgrade plan` for offline operation
**What this PR does / why we need it**:
This PR allows `kubeadm upgrade plan` to work in firewalled/offline/otherwise restricted environments by ignoring errors when trying to reach dl.k8s.io. Instead, we fall back to the current kubeadm version as the latest stable version. This is a reasonable as a user is [expected to install a recent version of kubeadm before upgrading](https://kubernetes.io/docs/tasks/administer-cluster/kubeadm-upgrade-1-8/#upgrading-your-control-plane).
**Which issue this PR fixes**: Fixeskubernetes/kubeadm#498
**Special notes for your reviewer**: Should preferably be cherrypicked to 1.8.
```release-note
Fix `kubeadm upgrade plan` for offline operation: ignore errors when trying to fetch latest versions from dl.k8s.io
```
Automatic merge from submit-queue (batch tested with PRs 54644, 53072). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Fix kubeadm swallowed errors
**What this PR does / why we need it**: Fixes nine swallowed errors in kubeadm, and adds descriptive error returns to Init.Run().
**Special notes for your reviewer**: I've resubmitted this PR after it required a rebase. Previously, I submitted this PR as https://github.com/kubernetes/kubernetes/pull/52591
```release-note NONE
```
