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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.
```
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Support retainkeys strategy for new merge code
- Some prefactoring for retainkeys
- Add retainkeys strategy
```release-note
NONE
```
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should check and return err when visit failure
**What this PR does / why we need it**:
should check and return err when visit failure
**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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cmd: genutils: remove entry from .golint_failures
**What this PR does / why we need it**:
`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`
**Special notes for your reviewer**:
Don't know which sig to use?
**Release note**:
```release-note
NONE
```
/kind cleanup
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Basic GCE PodSecurityPolicy Config
**What this PR does / why we need it**:
This PR lays the foundation for enabling PodSecurityPolicy in GCE and other default deployments. The 3 commits are:
1. Add policies, roles & bindings for the default addons on GCE.
2. Enable the PSP admission controller & load the addon policies when the`ENABLE_POD_SECURITY_POLICY=true` environment variable is set.
3. Support the PodSecurityPolicy in the E2E environment & add PSP tests.
NOTES:
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/52301 for privileged capabilities~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/52849 for sane mutations~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/53479 for aggregator tests to pass~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/54175 for dedicated fluentd service~~ account
- This PR is a fork of https://github.com/kubernetes/kubernetes/pull/46064, credit to @Q-Lee
**Which issue this PR fixes**: #43538
**Release note**:
```release-note
Add support for PodSecurityPolicy on GCE: `ENABLE_POD_SECURITY_POLICY=true` enables the admission controller, and installs policies for default addons.
```
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Update kube-openapi to use validation
**What this PR does / why we need it**: Moves openapi validation code to kube-openapi, so that we can move the rest of the code to apimachinery repository, so that later we can use it from both the client and the server.
**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 #Nothing
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Explicitly set route_localnet on nodes & masters.
Allow for loopback addresses to be used for routing, specifically to
enable metadata proxy on master nodes.
**What this PR does / why we need it**: Enables metadata proxy (#8867) to work on the master. This is already being done on the nodes by kube-proxy, but this makes it explicit, and sets it on the master where kube-proxy doesn't run. Thanks to @dnardo for figuring this out!
**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#54736
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
We should check for available volume before performing
attach or delete of EBS volume. This will make sure that
we do not blow up API quota of mutable operations in AWS and stay a
good citizen.
The grace period is unneccessary for calico/node and it delays restart of
a new calico/node pod to take over routing and policy updates.
Setting the grace period to 0 has the special meaning of doing a force deletion,
which avoids a slow round-trip through the kubelet and API server.
Fixes#55013
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
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admission: wire through validating-only admission
Based on https://github.com/kubernetes/kubernetes/pull/54232.
This is important and required for beta because it affects the shape of the webhook admission plugins that are going to be produced and is needed to make sure that our existing chain continues to properly verify and protect the API objects based on their final state after webhook admission mutators run.
We discussed this in the October 11 API machinery call with @erictune and @caesarxuchao and we agreed to do this as a requirement for beta. See this part of the recording: https://www.youtube.com/watch?v=mrgDPHyr4VY#t=325 .
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Fix error for strategic merge patch of custom resources
Fixes#50037.
We need the go struct tags `patchMergeKey` and `patchStrategy` for fields that support a strategic merge patch. For native resources, we can easily figure out these tags since we know the fields.
Because custom resources are decoded as Unstructured and because we're missing the metadata about how to handle each field in a strategic merge patch, we can't find the go struct tags. Hence, we can't easily do a strategic merge for custom resources.
So we should fail fast and return an error.
**Release note**:
```release-note
NONE
```
/cc @sttts @deads2k @ncdc
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rename metric reflector_xx_last_resource_version
**What this PR does / why we need it**:
mv reflector name from metric name to metric label
before:
```
reflector_k8s_io_kubernetes_pkg_client_informers_informers_generated_internalversion_factory_go:73_8664_last_resource_version{instance="104.154.20.21:443",job="kubernetes-apiservers"}
```
after
```
reflector_last_resource_version{instance="10.0.2.15:6443",job="kubernetes-apiservers",name="k8s_io_kubernetes_pkg_client_informers_informers_generated_internalversion_factory_go_73_8664"}
```
**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#52121
**Special notes for your reviewer**:
None
**Release note**:
```release-note
NONE
```
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Allow override of cluster level (default, whitelist) tolerations by namespace level empty (default, whitelist) tolerations.
Currently In PodTolerationRestriction admission plugin, if namespace level default and whitelist of tolerations are nil or empty, they do not override cluster level default and whitelist tolerations.
This PR fixes the plugin to not override cluster level tolerations only when namespace level toleration are nil. IOW, if namespace level toleration are empty, they override cluster level tolerations. To be more clear, if following annotations are set to empty, they override cluster level tolerations.
```
scheduler.alpha.kubernetes.io/defaultTolerations : ""
scheduler.alpha.kubernetes.io/tolerationsWhitelist: ""
```
This behavior is inline with PodNodeSelector admission plugin too.
@sjenning @derekwaynecarr
**Release Note**:
```release-note
In PodTolerationRestriction admisson plugin, if namespace level tolerations are empty, now they override cluster level tolerations.
```
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NewProxierWithNoProxyCIDR: fix handling IPv6 URLs
**What this PR does / why we need it**:
Current logic of splitting hostname from URL does not work if URL
is for IPv6 address and does not explicitly specify port number.
Example: "https://[2001:db8::1]/".
Use standard library function to get hostname out of URL string.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:
**Special notes for your reviewer**:
**Release note**:
```release-note
- Fix handling of IPv6 URLs in NO_PROXY.
```
/area ipv6
/sig api-machinery
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kubenet: yield lock while executing CNI plugin.
The CNI plugin can take up to 3 seconds to execute. CNI plugins can safely be
executed in parallel, so yield the lock to speed up pod creation.
This caused problems with the pod latency tests - previously, CNI plugins executed
in under 20ms. Now they must wait for DAD to finish and addresses to leave
tentative state.
Fixes: #54651
**What this PR does / why we need it**:
After upgrading CNI plugins to v0.6 in #51250, the pod latency tests began failing. This is because the plugins, in order to support IPv6, need to wait for DAD to finish. Because this
delay is while the kubenet lock is held, it significantly slows down the pod creation rate.
**Special notes for your reviewer**:
The CNI plugins also do locking for their critical paths, so it is safe to run them concurrently.
**Release note**:
```release-note
NONE
```
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Improve deleteOptions doc
**What this PR does / why we need it**:
This PR improves the doc of the 'PropagationPolicy' property of the DeleteOptions struct.
The said field is a string. It is very important a field for people who invoke a delete API.
For example, direct invocation of the deployment-delete API using the python client will have the replicaset and pods left behind. However, this field was not well documented. When people wanted to try different options, they have to dig into k8s source code to find out the acceptable values.
**Which issue this PR fixes**: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Useful helper functions for Unstructured
**Which issue this PR fixes**:
Fixes#40790
**Release note**:
```release-note
NONE
```
/kind feature
/sig api-machinery
/area client-libraries
/assign @sttts @liggitt
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Migrate netwrok partition test to sig apps
**What this PR does / why we need it**:
Migrate network partition relevant e2e test to sig-app.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Ref Umbrella issue #49161
**Special notes for your reviewer**:
**Release note**:
```release-note
none
```
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Update the get command to follow more conventions of commands
Pure code movement, builds on top of #54446 and only the last commit is new. Will make refactoring get easier.
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Fix a bug checking DaemonSet pods are updated in e2e test
**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#50586
**Special notes for your reviewer**: @kubernetes/sig-apps-bugs
**Release note**:
```release-note
NONE
```
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Inventory of kubectl dependency on main repository
**What this PR does / why we need it**:
Add an import-boss file to inventory what kubectl depends on, so
we can prune this list over time and eventually get kubectl out
of the main k/k repository.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Related to https://github.com/kubernetes/kubectl/issues/114
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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refactor ReplicaSet sync call tree
**What this PR does / why we need it**:
This PR refactors ReplicaSet sync call tree by refactoring `manageReplicas` and `syncReplicaSet` functions into smaller functions, and adding unit tests to each of the smaller functions.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: xref #52118
**Release note**:
```release-note
NONE
```
**TODO**:
- `manageReplicas`
- [x] move both outer and inner `batchSize` loops to a helper function named `slowStartBatch`, and test the function
- [x] add a helper function returning a list named `podsToDelete`, test the function, and refactor `DeletePod` loop to use the list
- [x] refactor skipped pod handling such that it happens after `slowStartBatch` returns
- `syncReplicaSet`
- [x] add unit tests for `calculateStatus`
- [x] move `canAdoptFunc` to a helper function
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Add sig-storage prefix for common e2e tests
**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 #
ref: #49161
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
ymqytw