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Tolerate partial discovery in garbage collector
Allow the garbage collector to tolerate partial discovery failures. On a
partial failure, use whatever was discovered, log the failures, and
allow the resync logic to try again later.
Fixes#55022.
```release-note
API discovery failures no longer crash the kube controller manager via the garbage collector.
```
/cc @caesarxuchao
Allow the garbage collector to tolerate partial discovery failures. On a
partial failure, use whatever was discovered, log the failures, and
allow the resync logic to try again later.
Fixes#55022.
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Refactor kube-scheduler config API, command, and server setup
Refactor the kube-scheduler configuration API, command setup, and server setup according to the guidelines established in #32215 and using the kube-proxy refactor (#34727) as a model of a well factored component adhering to said guidelines.
* Config API: clarify meaning and use of algorithm source by replacing modality derived from bools and string emptiness checks with an explicit AlgorithmSource type hierarchy.
* Config API: consolidate client connection config with common structs.
* Config API: split and simplify healthz/metrics server configuration.
* Config API: clarify leader election configuration.
* Config API: improve defaulting.
* CLI: deprecate all flags except `--config`.
* CLI: port all flags to new config API.
* CLI: refactor to match kube-proxy Cobra command style.
* Server: refactor away configurator.go to clarify application wiring.
* Server: refactor to more clearly separate wiring/setup from running.
Fixes https://github.com/kubernetes/kubernetes/issues/52428.
@kubernetes/api-reviewers
@kubernetes/sig-cluster-lifecycle-pr-reviews
@kubernetes/sig-scheduling-pr-reviews
/cc @ncdc @timothysc @bsalamat
```release-note
The kube-scheduler command now supports a `--config` flag which is the location of a file containing a serialized scheduler configuration. Most other kube-scheduler flags are now deprecated.
```
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Check RegisterMetricAndTrackRateLimiterUsage error when starting BootstrapSigner & TokenCleaner controllers
**What this PR does / why we need it**:
Prevent `BootstrapSigner` and `TokenCleaner` controllers to start if `metrics.RegisterMetricAndTrackRateLimiterUsage` returns an error.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: complements #53571
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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kubeadm: remove priority admission controller for v1.9
**What this PR does / why we need it**:
Removes Priority Admission Controller in kubeadm since it's currently in alpha.
**Release note**:
```release-note
Removes Priority Admission Controller from kubeadm since it's alpha.
```
cc @luxas
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kubeadm: don't create duplicate volume/mount
**What this PR does / why we need it**:
If certificates for etcd are located in the same directory or
subdirectories of kubernetes pki directory, don't create separate
volumes and mounts in manifests.
**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 kubernetes/kubeadm#522
**Special notes for your reviewer**:
/sig cluster-lifecycle
/area kubeadm
**Release note**:
```release-note
NONE
```
Refactor the kube-scheduler configuration API, command setup, and server
setup according to the guidelines established in #32215 and using the
kube-proxy refactor (#34727) as a model of a well factored component
adhering to said guidelines.
* Config API: clarify meaning and use of algorithm source by replacing
modality derived from bools and string emptiness checks with an explicit
AlgorithmSource type hierarchy.
* Config API: consolidate client connection config with common structs.
* Config API: split and simplify healthz/metrics server configuration.
* Config API: clarify leader election configuration.
* Config API: improve defaulting.
* CLI: deprecate all flags except `--config`.
* CLI: port all flags to new config API.
* CLI: refactor to match kube-proxy Cobra command style.
* Server: refactor away configurator.go to clarify application wiring.
* Server: refactor to more clearly separate wiring/setup from running.
Fixes#52428.
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apiserver: remove scheme arg from NewUnsecuredEtcd3TestClientServer
Not necessary anymore.
This was broken because the API machinery defaulting mechanism couldn't differentiate between an unset value (which should default to 24 hours) and a value explicitly set to 0 (which should mean infinite).
The fix is to change `TokenTTL` from a `metav1.Duration` to `*metav1.Duration` so that `nil` can represent the unspecified value.
This bug was introduced in https://github.com/kubernetes/kubernetes/pull/48783.
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kubeadm mount path '/lib/modules'
**What this PR does / why we need it**:
Kube-proxy need mount path '/lib/modules' to load kernel modules automatically inside the pod.
We already have this pr: #52003, for 'cluster/addons' and `saltbase'.
**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 #
**Release note**:
```release-note
NONE
```
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move KubeProxyConfiguration out of componentconfig API group
**What this PR does / why we need it**:
move KubeProxyConfiguration out of componentconfig API group
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#53577
**Special notes for your reviewer**:
/cc @thockin @ncdc
**Release note**:
```release-note
NONE
```
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Remove Google Cloud KMS's in-tree integration
Removes the following introduced by #48574 and others:
* `kms.go` which contained the cloudkms-specific code for Google Cloud KMS service.
* Registering the Google Cloud KMS in the KMS plugin registry.
* Google's `cloudkms` API package from `vendor` folder.
The following changes are upcoming:
* Removal of KMSPluginRegistry. This would not be needed anymore, since KMS providers will be out-of-tree from now on (so no need of registering them, an address of the process would be enough).
* A service which allows encrypt/decrypt functionality (satisfies `envelope.Service` interface) if initialized with an IP/Port of an out-of-tree process serving KMS requests. Will tentatively use gRPC requests to talk to this external service.
Reference: https://github.com/kubernetes/kubernetes/pull/54439#issuecomment-340062801 and https://github.com/kubernetes/kubernetes/issues/51965#issuecomment-339333937.
```release-note
Google KMS integration was removed from in-tree in favor of a out-of-process extension point that will be used for all KMS providers.
```
If certificates for etcd are located in the same directory or
subdirectories of kubernetes pki directory, don't create separate
volumes and mounts in manifests.
Fixeskubernetes/kubeadm#522
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Stop using the PersistentVolumeLabel admission controller in v1.9
**What this PR does / why we need it**:
Stop using the PersistentVolumeLabel admission controller in v1.9, as in v1.9, we're targeting out-of-tree cloud providers to be ready to use more generally as part of moving to beta.
**Which issue this PR fixes**:
fixeskubernetes/kubeadm#444
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kubeadm: reset: use crictl to reset containers
@luxas PTAL
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
**What this PR does / why we need it**:
This patch makes kubeadm to try and reset containers using `crictl` first instead of docker. The reason is that kubeadm reset is ineffective with new container runtimes using the CRI (like CRI-O).
This patch uses `crictl` first and falls back to `docker` in case `crictl` isn't available.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Fix https://github.com/kubernetes/kubeadm/issues/508
**Special notes for your reviewer**:
**Release note**:
```release-note
kubeadm: reset: use crictl to reset containers
```
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Adds Support for Configurable Kubeadm Probes.
**What this PR does / why we need it**:
Allows kubeadm liveness probes to be configurable using extra args. Needed to provide deployment flexibility where services are not bound to `127.0.0.1`.
**Which issue this PR fixes**: fixes https://github.com/kubernetes/kubeadm/issues/473
**Special notes for your reviewer**:
Needed for IPv6 support.
/sig network
/area ipv6
**Release note**:
```release-note
```
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Workloads V1
**What this PR does / why we need it**: This PR promotes the Deployment, ReplicaSet, and DaemonSet StatefulSet, ControllerRevision kinds to the apps/v1 group version.
https://github.com/kubernetes/features/issues/353
**Special notes for your reviewer**:
There will be at least two followups to this PR. The first to add a scale sub-resource when the correct location is resolved, and the second to deal with Conditions in the workloads API.
While it would have been preferable to move the kinds individually providing a lesser burden on reviewers, this proved impracticable due to the intricacies of version resolution in kubectl for objects of the different kinds in the same group.
```release-note
DaemonSet, Deployment, ReplicaSet, and StatefulSet have been promoted to GA and are available in the apps/v1 group version.
```
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Improve unit test coverage for kube-proxy configuration.
**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 #
**Special notes for your reviewer**:
/cc @ncdc
**Release note**:
```release-note
NONE
```
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Only parse ClusterCIDR, ServiceCIDR if AllocateNodeCIDRs
**What this PR does / why we need it**:
Avoid unnecessary spam in kube-controller-manager log if --cluster-cidr is not specified and --allocate-node-cidrs is false. Add clarification in kube-controller-manager help about that.
**Release note**
```release-note
Avoid unnecessary spam in kube-controller-manager log if --cluster-cidr is not specified and --allocate-node-cidrs is false.
```
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Fix kube-proxy fall back to iptables firstly when unable to load kernel modules
**What this PR does / why we need it**:
Fix kube-proxy fall back to iptables firstly when unable to load kernel modules
**Which issue this PR fixes**:
fixes#54121
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/kind bug
/sig network
/area kube-proxy
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If command.Execute() return err, print to stdErr
The current kube-proxy not print error if (execute() failed) . not so good and not so friendly to user.
If print err to stdError, will show us why it failed.
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Lift embedded structure out of ManifestURLHeader field
Related: #53833
```release-note
It is now possible to set multiple manifest url headers via the Kubelet's --manifest-url-header flag. Multiple headers for the same key will be added in the order provided. The ManifestURLHeader field in KubeletConfiguration object (kubeletconfig/v1alpha1) is now a map[string][]string, which facilitates writing JSON and YAML files.
```
ClusterCIDR and ServiceCIDR are settings that are only used if at least
AllocateNodeCIDRs is set. The route controller requires in addition to
it for ConfigureCloudRoutes to be true as well. Since
AllocateNodeCIDRs is by default false, if guard the parsing of these
settings in order to not unnecessarily spam logs. Amend the
documentation of kube-controller-manager for the 2 settings to point
out the requirement of AllocateNodeCIDRs to be true as well
`golint` emits warnings
```
exported function OutDir should have comment or be unexported.
strings should not be capitalized or end with punctuation or a newline
```
- Add documentation comment to exported function OutDir.
- Remove newline from error string.
- Remove `hack\.golint_failures` entry for `cmd/genutils`
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fix kubelet startup args
**What this PR does / why we need it**:
There should not be space between memory and disk.
**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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fix a syntax error in a comment
**What this PR does / why we need it**:
**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
```
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Kubeadm - Added initial support for Windows worker nodes to join cluster using kubeadm
**What this PR does / why we need it**:
This PR adds initial support for adding a Windows worker node to a Kubernetes cluster with kubeadm. Also adds Windows build of kubeadm to node build targets.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes https://github.com/kubernetes/kubeadm/issues/364
**Special notes for your reviewer**:
Depends on #53730
**Release note**:
```release-note
kubeadm: Add support for adding a Windows node
```
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support kube-proxy ipvs mode for kubeadm
**What this PR does / why we need it**:
When using `kubeadm` to build a cluster, you can chose kube-proxy with ipvs mode by add flag `--kube-proxy-mode=ipvs`.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#52834
**Special notes for your reviewer**:
By default, use `iptables` mode.
**Release note**:
```release-note
NONE
```
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Add self-hosted etcd API to kubeadm
**What this PR does / why we need it**:
This PR is part of a larger set that implements self-hosted etcd. This PR takes a first step by adding:
1. new API types in `cmd/kubeadm/app/apis` for configuring self-hosted etcd
2. new Go types in `cmd/kubeadm/app/phases/etcd/spec` used for constructing EtcdCluster CRDs for the etcd-operator. The reason we define these in trunk is because kubeadm cannot import `github.com/coreos/etcd-operator` as a dependency until it's in its own repo. Until then, we need to redefine the structs in our codebase.
**Which issue this PR fixes**:
https://github.com/kubernetes/kubeadm/issues/261https://github.com/kubernetes/kubeadm/issues/277
**Special notes for your reviewer**:
This is the first step PR in order to save reviewers from a goliath PR
**Release note**:
```release-note
NONE
```
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Remove MinimumCSRAutoApprovalClusterRolesVersion in 1.9 cycle.
**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 #
**Special notes for your reviewer**:
Have we already bumped the minimum supported version to v1.8.0?
/cc @luxas
**Release note**:
```release-note
NONE
```
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kubeadm: Make it possible to configure volume mounts via the config file
**What this PR does / why we need it**:
Kubeadm mounts host CA certs into api server and controller manager. It uses `/etc/pki` and does not allow for the path to be configurable. This PR adds a default to `/etc/pki` but also allows a user to configure the path in the config file. In the case of using Container Linux, the CAs are located at `/usr/share/ca-certificates`, so without this PR the hardcoded `/etc/pki` path is used and will break, for example, the `--cloud-provider` flag because of missing CAs.
Fixes https://github.com/kubernetes/kubeadm/issues/484
Fixes https://github.com/kubernetes/kubeadm/issues/476
Fixes https://github.com/kubernetes/kubeadm/issues/441
/cc @luxas
