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Change legacy API resource registration
Updates the legacy API resource registration to emphasize its different-ness and to simplify supporting objects. The option has to remain in the genericapiserverconfig for multiple prefixes to enable cases where composers/extenders had composed additional groupless APIs. See OpenShift as an example.
However this is now transparent to "normal" composers.
@ncdc since sttts is out.
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WantsAuthorizer admission plugin support
The next step of PSP admission is to be able to limit the PSPs used based on user information. To do this the admission plugin would need to make authz checks for the `user.Info` in the request. This code allows a plugin to request the injection of an authorizer to allow it to make the authz checks.
Note: this could be done with a SAR, however since admission is running in the api server using the SAR would incur an extra hop vs using the authorizer directly.
@deads2k @derekwaynecarr
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Generate unique Operation IDs for root OpenAPI spec
This PR adds a customization method GetOperationID to OpenAPI spec generation and then use it to make sure root spec has unique operation IDs by mostly adding GroupVersion to the start of operation ID.
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Federated deployment controller - part 1
Based on federated replicaset controller (copy + find/replace).
Remaining stuff:
- refacing out common elements to libs
- using owerref in pod analysis
- e2e tests
- renaming concurrency flag for rs and reusing it in deployment
- updating only one cluster at a time if rollingupdate strategy is used.
cc: @quinton-hoole @kubernetes/sig-cluster-federation
**Release note**:
```release-note
Federated deployment controller that supports the same api as the regular kubernetes deployment controller.
```
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decouple workqueue metrics from prometheus
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**What this PR does / why we need it**:
We want to include the workqueue in client-go, but do not want to having to import Prometheus. This PR decouples the workqueue from prometheus.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Partially address https://github.com/kubernetes/kubernetes/issues/33497
User requested for `workqueue` in client-go: https://github.com/kubernetes/client-go/issues/4#issuecomment-249444848
**Special notes for your reviewer**:
**Release note**:
<!-- Steps to write your release note:
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2. Enter your extended release note in the below block; leaving it blank means using the PR title as the release note. If no release note is required, just write `NONE`.
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```release-note
The implicit registration of Prometheus metrics for workqueue has been removed, and a plug-able interface was added. If you were using workqueue in your own binaries and want these metrics, add the following to your imports in the main package: "k8s.io/pkg/util/workqueue/prometheus".
```
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Set deserialization cache size based on target memory usage
**Special notes for your reviewer**:
This is the PR we talked about yesterday.
**Release note**:
```release-note
To reduce memory usage to reasonable levels in smaller clusters, kube-apiserver now sets the deserialization cache size based on the target memory usage.
```
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Allow anonymous API server access, decorate authenticated users with system:authenticated group
When writing authorization policy, it is often necessary to allow certain actions to any authenticated user. For example, creating a service or configmap, and granting read access to all users
It is also frequently necessary to allow actions to any unauthenticated user. For example, fetching discovery APIs might be part of an authentication process, and therefore need to be able to be read without access to authentication credentials.
This PR:
* Adds an option to allow anonymous requests to the secured API port. If enabled, requests to the secure port that are not rejected by other configured authentication methods are treated as anonymous requests, and given a username of `system:anonymous` and a group of `system:unauthenticated`. Note: this should only be used with an `--authorization-mode` other than `AlwaysAllow`
* Decorates user.Info returned from configured authenticators with the group `system:authenticated`.
This is related to defining a default set of roles and bindings for RBAC (https://github.com/kubernetes/features/issues/2). The bootstrap policy should allow all users (anonymous or authenticated) to request the discovery APIs.
```release-note
kube-apiserver learned the '--anonymous-auth' flag, which defaults to true. When enabled, requests to the secure port that are not rejected by other configured authentication methods are treated as anonymous requests, and given a username of 'system:anonymous' and a group of 'system:unauthenticated'.
Authenticated users are decorated with a 'system:authenticated' group.
NOTE: anonymous access is enabled by default. If you rely on authentication alone to authorize access, change to use an authorization mode other than AlwaysAllow, or or set '--anonymous-auth=false'.
```
c.f. https://github.com/kubernetes/kubernetes/issues/29177#issuecomment-244191596
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move registry packages for all API groups
This continues the pattern of `registry/<group>/resource` for our backing storage. This entire pull is nothing but moves. I'll reswizzle the actual storage next, but these are cargo-culted everywhere, so I want to lay this down early.
@sttts @ncdc
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Allow secure access to apiserver from Admission Controllers
* Allow options.InsecurePort to be set to 0 to switch off insecure access
* In NewSelfClient, Set the TLSClientConfig to the cert and key files
if InsecurePort is switched off
* Mint a bearer token that allows the client(s) created in NewSelfClient
to talk to the api server
* Add a new authenticator that checks for this specific bearer token
Fixes#13598
* Allow options.InsecurePort to be set to 0 to switch off insecure access
* In NewSelfClient, Set the TLSClientConfig to the cert and key files
if InsecurePort is switched off
* Mint a bearer token that allows the client(s) created in NewSelfClient
to talk to the api server
* Add a new authenticator that checks for this specific bearer token
Fixes#13598
Automatic merge from submit-queue
Cleanup non-rest apiserver handlers
- rename MuxHelper -> PathRecorderMux
- move non-rest handlers into routes packages within genericapiserver and `pkg/routes` (those from master)
- move ui and logs handlers out of genericapiserver (they are
not generic)
- make version handler configurable (`config.EnableVersion`)
- rename MuxHelper -> PathRecorderMux
- move non-rest handlers into routes packages within genericapiserver and
`pkg/routes` (those from master)
- move ui and logs handlers out of genericapiserver (they are
not generic)
- make version handler configurable (`config.EnableVersion`)
Automatic merge from submit-queue
federation: Adding support for namespace admission controls in federation-apiserver
Now that we have namespaces in federation apiserver, we can support namespace admission controls.
There are 3 of these:
namespace/autoprovision, namespace/exists and namespace/lifecycle.
namespace/autoprovision, namespace/exists should be deprecated in kubernetes(https://github.com/kubernetes/kubernetes/issues/31195). Adding support for namespace/lifecycle to federation-apiserver.
As in kube-apiserver, enabling namespace/lifecycle by default.
```release-note
Action required: If you have a running federation control plane, you will have to ensure that for all federation resources, the corresponding namespace exists in federation control plane.
federation-apiserver now supports NamespaceLifecycle admission control, which is enabled by default. Set the --admission-control flag on the server to change that.
```
cc @kubernetes/sig-cluster-federation @quinton-hoole
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pkg/genericapiserver/options: don't import pkg/apiserver
Refactor the authorization options for the API server so
pkg/apiserver isn't directly imported by the options package.
Closes#28544
cc @smarterclayton
@madhusudancs, @nikhiljindal I've updated `federation/cmd/federation-apiserver/app/server.go` to include the RBAC options with this change. I don't know if this was intentionally left out in the first place but would like your feedback.
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Federated namespace controller
Implemented based on federation common libs.
Depends on #30126.
cc: @quinton-hoole @wojtek-t @kubernetes/sig-cluster-federation
