Automatic merge from submit-queue (batch tested with PRs 45508, 44258, 44126, 45441, 45320)
cloud initialize node in external cloud controller
@thockin This PR adds support in the `cloud-controller-manager` to initialize nodes (instead of kubelet, which did it previously)
This also adds support in the kubelet to skip node cloud initialization when `--cloud-provider=external`
Specifically,
Kubelet
1. The kubelet has a new flag called `--provider-id` which uniquely identifies a node in an external DB
2. The kubelet sets a node taint - called "ExternalCloudProvider=true:NoSchedule" if cloudprovider == "external"
Cloud-Controller-Manager
1. The cloud-controller-manager listens on "AddNode" events, and then processes nodes that starts with that above taint. It performs the cloud node initialization steps that were previously being done by the kubelet.
2. On addition of node, it figures out the zone, region, instance-type, removes the above taint and updates the node.
3. Then periodically queries the cloudprovider for node addresses (which was previously done by the kubelet) and updates the node if there are new addresses
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 44727, 45409, 44968, 45122, 45493)
Separate healthz server from metrics server in kube-proxy
From #14661, proposal is on kubernetes/community#552.
Couple bullet points as in commit:
- /healthz will be served on 0.0.0.0:10256 by default.
- /metrics and /proxyMode will be served on port 10249 as before.
- Healthz handler will verify timestamp in iptables mode.
/assign @nicksardo @bowei @thockin
**Release note**:
```release-note
NONE
```
- /healthz will be served on 0.0.0.0:10256 by default.
- /metrics and /proxyMode will be served on port 10249
as before.
- Healthz handler will verify timestamp in iptables mode.
Automatic merge from submit-queue (batch tested with PRs 45364, 45369, 45323)
kubeadm: edit apiserver flags for storage-backend
**What this PR does / why we need it**: Since storage-backend defaults to etcd3 in 1.6 (see https://github.com/kubernetes/kubernetes/pull/36229), no need to have a flag defining the default.
**Special notes for your reviewer**: /cc @luxas
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 45309, 45376)
kubeadm: Fix the tainting of the master node
**What this PR does / why we need it**:
Currently, kubeadm unintentionally removes Taints set with the kubelet flag `--register-with-taints` when creating a new Taint slice instead of appening the existing one. This PR fixes that behavior.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
This should be a cherrypick candidate for v1.6 cc @enisoc
**Release note**:
```release-note
kubeadm: Fix invalid assign statement so it is possible to register the master kubelet with other initial Taints
```
@jbeda @dmmcquay @mikedanese @krousey PTAL, very straightforward PR
Automatic merge from submit-queue (batch tested with PRs 45362, 45159, 45321, 45238)
expose kubelet authentication and authorization builders
The kubelet authentication and authorization builder methods are useful for consumers.
@liggitt
Automatic merge from submit-queue (batch tested with PRs 45316, 45341)
Pass NoOpLegacyHost to dockershim in --experimental-dockershim mode
This allows dockershim to use network plugins, if needed.
/cc @Random-Liu
Automatic merge from submit-queue
[WIP] Skip resize of nf_conntrack/parameters/hashsize if not necessary
**What this PR does / why we need it**:
Linux does not support writing to `/sys/module/nf_conntrack/parameters/hashsize` when the writer process is not in the initial network namespace
(https://github.com/torvalds/linux/blob/v4.10/net/netfilter/nf_conntrack_core.c#L1795-L1796).
Usually that's fine. But in some configurations such as with https://github.com/kinvolk/kubeadm-nspawn, kube-proxy is in another netns.
Therefore, check if writing in hashsize is necessary and skip the writing if not.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
```
Automatic merge from submit-queue
kubelet/get-pods-from-path: correct description of implemention
**What this PR does / why we need it**:
I find this description does not follow the current implementation, it should be describe like this according to my understanding of the source code.
Automatic merge from submit-queue (batch tested with PRs 45227, 43003, 45231)
kubeadm: move preflight kubelet check
**What this PR does / why we need it**: If you passed the `--skip-preflight-checks` to kubeadm, it would still try to start up the kubelet, which is part of preflight checks. This was causing issues for test-cmds. Now, passing `--skip-preflight-checks` will skip over the kubelet check.
**Special notes for your reviewer**: /cc @luxas @deads2k
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue
Delete "hard-coded" default value in flags usage.
**What this PR does / why we need it**:
Some flags of kubernetes components have "hard-coded" default values in their usage info. In fact, [pflag pkg](https://github.com/kubernetes/kubernetes/blob/master/vendor/github.com/spf13/pflag/flag.go#L602-L608) has already added a string `(default value)` automatically in the usage info if the flag is initialized. Then we don't need to hard-code the default value in usage info. After this PR, if we want to update the default value of a flag, we only need to update the flag where it is initialized. `pflag` will update the usage info for us. This will avoid inconsistency.
For example:
Before
```
kubelet -h
...
--node-status-update-frequency duration Specifies how often kubelet posts node status to master. Note: be cautious when changing the constant, it must work with nodeMonitorGracePeriod in nodecontroller. Default: 10s (default 10s)
...
```
After
```
kubelet -h
...
--node-status-update-frequency duration Specifies how often kubelet posts node status to master. Note: be cautious when changing the constant, it must work with nodeMonitorGracePeriod in nodecontroller. (default 10s)
...
```
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
This PR doesn't delete some "hard-coded" default values because they are not explicitly initialized. We still need to hard-code them to give users friendly info.
```
--allow-privileged If true, allow containers to request privileged mode. [default=false]
```
**Release note**:
```release-note
None
```
Automatic merge from submit-queue (batch tested with PRs 41583, 45117, 45123)
Implement shared PID namespace in the dockershim
**What this PR does / why we need it**: Defaults the Docker CRI to using a shared PID namespace for pods. Implements proposal in https://github.com/kubernetes/community/pull/207 tracked by #1615.
//cc @dchen1107 @vishh @timstclair
**Special notes for your reviewer**: none
**Release note**:
```release-note
Some container runtimes share a process (PID) namespace for all containers in a pod. This will become the default for Docker in a future release of Kubernetes. You can preview this functionality if running with the CRI and Docker 1.13.1 by enabling the --experimental-docker-enable-shared-pid kubelet flag.
```
Automatic merge from submit-queue (batch tested with PRs 44044, 44766, 44930, 45109, 43301)
add APIService conditions
Adds conditions to the APIServiceStatus struct and fixes up generators that appear to have slipped.
The first condition is "ServiceAvailable" which will provide the status currently derived in the discovery handler that decides about whether to expose the version in discovery.
@kubernetes/sig-api-machinery-pr-reviews @liggitt @ncdc
Automatic merge from submit-queue (batch tested with PRs 42432, 44628, 45101, 44921)
kubeadm: join test cmds for new flags
**What this PR does / why we need it**: Adding test-cmds for new kubeadm join flags.
Adding tests is a WIP from #34136
This is a continuation from https://github.com/kubernetes/kubernetes/pull/42812 since it had to be closed.
**Special notes for your reviewer**: /cc @luxas
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue
Prepare for move zz_generated_deepcopy.go to k8s.io/api
This is in preparation to move deep copies to with the types to the types repo (see https://github.com/kubernetes/gengo/pull/47#issuecomment-296855818). The init() function is referring the `SchemeBuilder` defined in the register.go in the same packge, so we need to revert the dependency.
This PR depends on https://github.com/kubernetes/gengo/pull/49, otherwise verification will fail.
Automatic merge from submit-queue (batch tested with PRs 45052, 44983, 41254)
Non-controversial part of #44523
For easier review of #44523, i extracted the non-controversial part out to this PR.
Automatic merge from submit-queue (batch tested with PRs 44940, 44974, 44935)
Remove import of internal api package in generated external-versioned listers
Follow up of https://github.com/kubernetes/kubernetes/pull/44523
One line change in cmd/libs/go2idl/lister-gen/generators/lister.go, and simple changes in pkg/apis/autoscaling/v2alpha1/register.go, other changes are generated.
The internal api package will be eliminated from client-go, so these imports should be removed. Also, it's more correct to report the versioned resource in the error.
Automatic merge from submit-queue
kubeadm: remove func arg that isn't being used
**What this PR does / why we need it**: Functions had args passed to them that weren't being used. See https://github.com/kubernetes/kubernetes/pull/44601 for more details.
**Special notes for your reviewer**: @luxas
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue
Add --apiserver-advertise-address option to kubeadm alpha phase certs…
**What this PR does / why we need it**:
`kubeadm alpha phase certs` command currently does not support `--apiserver-advertise-address` options, and certificates by default are linked to the bind address of the machine where the kubeadm command is run. This behaviour is not adequate f.i. for use cases where you are using `kubeadm alpha phase certs` for an HA deployments or for use cases where you generate certificates on a machine different that the master.
The PR adds support for `--apiserver-advertise-address` to `kubeadm alpha phase certs`, with the following behaviour:
- if `--apiserver-advertise-address` is specified and valid, certificates are linked to the given IP
- if `--apiserver-advertise-address` is specified but not valid, the given ip is not valid an error is given
**Special notes for your reviewer**:
Implementation follow the track already in place for other flags (with validation, but no tests).
