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>.
kubeadm join the cluster with pre-existing client certificate if provided
**What this PR does / why we need it**:
support `kubeadm join` with a pre-existing client certificate
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixeskubernetes/kubeadm#945
**Special notes for your reviewer**:
/cc @luxas @timothysc @kubernetes/sig-cluster-lifecycle-pr-reviews
**Release note**:
```release-note
kubeadm now can join the cluster with pre-existing client certificate if provided
```
Clear Linux Project for Intel Architecture uses its own path
to store kernel build artifacts. This is documented, e.g.,
in https://github.com/clearlinux/clr-boot-manager.
Adapt kernel validator's config check paths to include Clear
Linux's path too.
Automatic merge from submit-queue (batch tested with PRs 66152, 66406, 66218, 66278, 65660). 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>.
Handle errors
**What this PR does / why we need it**:
This is a followup PR for https://github.com/kubernetes/kubernetes/pull/64664 to handle errors returned from `.AddToScheme()` in places where they are not handled.
**Release note**:
```release-note
NONE
```
/kind cleanup
/sig api-machinery
/cc @sttts
Improved runtime tests by using T.Run API:
https://golang.org/pkg/testing/#T.Run
This should improve the test output and make it more visible
which test is doing what.
Automatic merge from submit-queue (batch tested with PRs 65429, 64611). 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>.
Move runtime details into ContainerRuntime
**What this PR does / why we need it**:
This PR moves all docker and CRI specifics into new ContainerRuntime
entity to isolate container runtime details from the rest of the code.
This should help to avoid having CRI and docker specific checks and code all over the place.
**NOTE: this is a not a finished work, but rather an RFC.**
Things to do:
- test manually in docker and cri-o environments
**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>.
Fix kubeadm checks import error
kubeadm checks package import path exist "kubernetes/test",
So change the import path.
* move "k8s.io/kubernetes/test/e2e_node/system" directory file
tto "k8s.io/kubernetes/cmd/kubeadm/app/util/system" and change checks import
* remove "k8s.io/kubernetes/test/e2e_node/system" directory
Issues report link:
https://github.com/kubernetes/kubeadm/issues/976
Signed-off-by: Yuanbin.Chen <cybing4@gmail.com>
**What this PR does / why we need it**:
**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 #https://github.com/kubernetes/kubeadm/issues/976
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 66094, 65676). 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>.
Add a timeout when fetching latest version
**What this PR does / why we need it**:
When there is no internet on the node and `--kubernetes-versio`n is not specified running `kubeadm init` hangs forever with no text output.
**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 https://github.com/kubernetes/kubeadm/issues/986
**Special notes for your reviewer**:
Using the same duration as the existing timeout `externalEtcdRequestTimeout`
Sample output:
```
kubeadm init
unable to get URL "https://dl.k8s.io/release/stable-1.11.txt": Get https://dl.k8s.io/release/stable-1.11.txt: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
```
**Release note**:
```release-note
kubeadm: use an HTTP request timeout when fetching the latest version of Kubernetes from dl.k8s.io
```
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>.
Make kubernetes json serializer case sensitive
This PR imported the latest jsoniterator library so that case sensitivity during unmarhsaling is optional. The PR also set Kubernetes json serializer to be case sensitive.
Kubernetes json serializer had been case sensitive for 1.1-1.7 as we were using ugorji. This PR restores the behavior.
Fix#64612.
```release-notes
Kubernetes json deserializer is now case-sensitive as it was before 1.8.
If your config files contains fields with wrong case, the config files will be now invalid.
```
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>.
kubeadm: When etcd is listening on all interfaces, set the etcd probe to use loopback
**What this PR does / why we need it**:
When constructing the etcd liveness probe, if the user passes an IPv4 or IPv6 address,
we set the `etcdctl` liveness probe to use the respective IPv4 or IPv6 loopback address for `--endpoints`.
The etcd probe is now always formatted with the https:// protocol and square brackets around the IP (required for IPv6 / compatible with IPv4).
`::1` is now also included in the etcd serving cert SAN by default.
/kind bug
/area kubeadm
/area etcd
/priority important-soon
/sig cluster-lifecycle
/assign @fabriziopandini
**Which issue(s) this PR fixes**
Fixes https://github.com/kubernetes/kubeadm/issues/882
**Special notes for your reviewer**:
```bash
root@vagrant:~# /vagrant/bin/882_kubeadm init --config /dev/stdin << EOF |& tail -n5
etcd:
extraArgs:
listen-client-urls: https://[::]:2379
EOF
I0603 19:52:15.666594 24743 tlsbootstrap.go:50] [bootstraptoken] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
I0603 19:52:15.671424 24743 tlsbootstrap.go:72] [bootstraptoken] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
I0603 19:52:15.674607 24743 tlsbootstrap.go:95] [bootstraptoken] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
I0603 19:52:15.677551 24743 clusterinfo.go:43] [bootstraptoken] creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
root@vagrant:~# cat /etc/kubernetes/manifests/etcd.yaml |grep -C4 listen
spec:
containers:
- command:
- etcd
- --listen-client-urls=https://[::]:2379
- --advertise-client-urls=https://127.0.0.1:2379
- --cert-file=/etc/kubernetes/pki/etcd/server.crt
- --client-cert-auth=true
- --data-dir=/var/lib/etcd
root@vagrant:~# cat /etc/kubernetes/manifests/etcd.yaml |grep -C4 etcdctl
exec:
command:
- /bin/sh
- -ec
- ETCDCTL_API=3 etcdctl --endpoints=https://[::1]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt
--cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key
get foo
failureThreshold: 8
initialDelaySeconds: 15
```
**Release note**:
```release-note
kubeadm now configures the etcd liveness probe correctly when etcd is listening on all interfaces
```
Some domains, like ELBs, output a domain name with uppercase letters. To
accept these, we lowercase all arguments passed to ----apiserver-cert-extra-sans
