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Support out-of-tree / external cloud providers
**What this PR does / why we need it**:
Currently kubeadm fails in preflight check. We should allow external cloud providers
```
[preflight] Starting the kubelet service
cloudprovider: Invalid value: "external": cloudprovider not supported
```
**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
Added support for external cloud providers in kubeadm
```
This feature gate was redundant with the `--config` flag, which already
enables/disables loading Kubelet config from a file.
Since the gate guarded an alpha feature, removing it is not a violation
of our API guidelines.
Some stuff in `kubernetes/test-infra` currently sets the gate,
so removing will be a 3 step process:
1. This PR, which makes the gate a no-op.
2. Stop setting the gate in `kubernetes/test-infra`.
3. Completely remove the gate.
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Add deprecation warnings for rktnetes flags
**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#53601
**Special notes for your reviewer**:
**Release note**:
```release-note
rktnetes has been deprecated in favor of rktlet. Please see https://github.com/kubernetes-incubator/rktlet for more information.
```
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Fix master regex when running multiple clusters
**What this PR does / why we need it**:
I'm running two Kubernetes clusters on GCE. One for production and one for staging. The instance prefix I use for production is `kubernetes` and for staging it's `staging-kubernetes`. This caused a problem when running `kube-up.sh` for production because when it tries to find all instances which match `kubernetes(-...)?` it finds both the production and staging instances. This probably results in multiple problems, but the most noticeable one for me was that `INITIAL_ETCD_CLUSTER` was incorrect and so etcd wouldn't start up correctly so the api server doesn't start up correctly so nothing else starts up. I tested this manually and it seems to work for me, but I didn't write an automated test.
**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
Fixes bug finding master replicas in GCE when running multiple Kubernetes clusters
```
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process pvc watch deletion event miss in expand-controller
**What this PR does / why we need it**:
volume expand controller should also process exception case when watch deletion event missed as most controllers do.
**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
```
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Update cluster addon Calico to v2.6.6
**What this PR does / why we need it**:
Updates the cluster addon Calico to the 2.6.6 release (in preparation for upgrade to v3.0).
This also switches to pull the images from gcr.io.
**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**:
@caseydavenport
**Release note**:
Should there be a release note for this? WDYT?
```release-note
NONE
```
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promote aggregation API to v1
Finishing https://github.com/kubernetes/features/issues/263 as discussed in apimachinery
The API has been available since 1.6 and beta since 1.7. Openshift has been using it for about a year and service catalog (@pmorie) and metrics server (@piosz @DirectXMan12) have both been using too. The feature and the API have both been stable over that time.
@kubernetes/sig-api-machinery-api-reviews @kubernetes/api-approvers
/assign lavalamp
/assign smarterclayton
```release-note
Promoting the apiregistration.k8s.io (aggregation) to GA
```
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Optionally launch build containers inside a specific parent cgroup
**What this PR does / why we need it**: Adds support to the build process for launching containers inside a specific parent cgroup via the `--cgroup-parent` docker arg. We needed this to enforce resource usage when building Kubernetes in our CI environment.
**Special notes for your reviewer**: None
**Release note**:
```release-note
NONE
```
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Add better event handling for deleted Pods
**What this PR does / why we need it**:
We have observed cases where scheduler cache has not been updated after Pod deletions. This PR makes the event handling logic more robust by adding logic to check for `cache.DeletedFinalStateUnknown` in our event handler filters.
**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
Stability: Make Pod delete event handling of scheduler more robust.
```
/sig scheduling
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Adding network spaces support for kubeapi-load-balancer.
**What this PR does / why we need it**:
Adding support for juju network spaces to kubeapi-load-balancer charm
**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/juju-solutions/bundle-canonical-kubernetes/issues/406
**Special notes for your reviewer**:
**Release note**:
```release-note
Added support for network spaces in the kubeapi-load-balancer charm
```
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Adding network spaces support for kubernetes-master.
**What this PR does / why we need it**:
Adding support for juju network spaces to kubernetes-master charm
**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/juju-solutions/bundle-canonical-kubernetes/issues/406
**Special notes for your reviewer**:
**Release note**:
```release-note
Added support for network spaces in the kubernetes-master charm
```
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Clean up error messages for pre-bound PVCs.
When a PVC explicitly requests specific PV and the PV does not match, we should tell the user what exactly does not match.
From: `Volume's size is smaller than requested or volume's class does not match with claim`
To: `Cannot bind to requested volume "<volume name>": %s`, where `%s` is one of:
- `requested PV is too small`
- `storageClasseNames do not match`
- `incompatible volumeMode`
- `error checking volumeMode: api defaulting for volumeMode failed` (this should not ever happen)
/sig storage
@kubernetes/sig-storage-pr-reviews
**Release note**:
```release-note
NONE
```
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update etcd unified version to 3.1.10
**What this PR does / why we need it**:
update etcd unitied version to `3.1.10`
**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**:
```
bump etcd version to 3.1.10
```
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updates fluentd in fluentd-es-image to fluentd 1.1.0
**What this PR does / why we need it**: Updates fluentd in fluentd-es-image to fluentd 1.1.0.
Its also needed to be able to use the new fluentd-elasticsearch helm chart from: https://github.com/kubernetes/charts/pull/3379
**Release note**:
```release-note
updates fluentd in fluentd-es-image to fluentd 1.1.0
```
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kubectl: Use metrics-server for kubectl top commands
**What this PR does / why we need it**:
This PR implements support for the kubectl top commands to use the metrics-server as an aggregated API, instead of requesting the metrics from heapster directly. If the `metrics.k8s.io` API is not served by the apiserver, then this still falls back to the previous behavior.
**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#55489
**Special notes for your reviewer**:
As utilizing heapster as well as the v1alpha1 version of the metrics API is discouraged, I intentionally implemented the support very separated, so that once it is decided, that support is entirely removed, this will make it easy.
**Release note**:
```release-note
Support metrics API in `kubectl top` commands.
```
/cc @kubernetes/sig-instrumentation-pr-reviews @DirectXMan12 @fgrzadkowski @piosz
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Expose the generate stub for compute API
This allows clients such as Ingress to begin migration to the newly
generated stubs.
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 58697, 58658, 58676, 58674). 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 possible panic when getting Azure primary IPConfig
**What this PR does / why we need it**:
kube-controller-manager panic when removing a lot of nodes from kubernetes cluster (see #58675).
**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#58675
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Wait for healthy extension server before registering APIService, handle ServiceUnavailable errors
fixes#58642
followup to #58070
* Because a registered APIService appears in discovery immediately, we should wait until the backing deployment is healthy before exposing it
* In e2e hasRemainingContent(), add ServiceUnavailable to the types of errors we tolerate when looking for remaining content.
* In proxy handler, return a ServiceUnavailable error if the referenced service cannot be resolved
```release-note
NONE
```
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