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Adding cadcading deletion support for federated secrets
Ref https://github.com/kubernetes/kubernetes/issues/33612
Adding cascading deletion support for federated secrets.
The code is same as that for namespaces. Just ensuring that DeletionHelper functions are called at right places in secret_controller.
Also added e2e tests.
cc @kubernetes/sig-cluster-federation @caesarxuchao
```release-note
federation: Adding support for DeleteOptions.OrphanDependents for federated secrets. Setting it to false while deleting a federated secret also deletes the corresponding secrets from all registered clusters.
```
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Adding more e2e tests for federated namespace cascading deletion and fixing bugs
Ref https://github.com/kubernetes/kubernetes/issues/33612
Adding more e2e tests for testing cascading deletion of federated namespace.
New tests are now verifying that cascading deletion happen when DeletionOptions.OrphanDependents=false and it does not happen when DeleteOptions.OrphanDependents=true.
Also updated deletion helper to always add OrphanFinalizer. generic registry will remove it if DeleteOptions.OrphanDependents=false. Also updated namespace registry to do the same.
We need to add the orphan finalizer to keep the orphan by default behavior. We assume that its dependents are going to be orphaned and hence add that finalizer. If user does not want the orphan behavior, he can do so using DeleteOptions and then the registry will remove that finalizer.
cc @kubernetes/sig-cluster-federation @caesarxuchao @derekwaynecarr
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[Federation][init-10c] Fix hyperkube binary path in the image and disable auth mechanisms we don't support for now.
Please review only the last commit here. This is based on PR #36047 which will be reviewed independently.
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @nikhiljindal
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Read the federation controller manager kubeconfig from a filesystem path
This decoupling from the Kubernetes API allows admins to run federation control plane components wherever they like, even outside Kubernetes. This also makes the federation controller manager read its config from one single place in a uniform and/or consistent way, instead of spreading the config around command line flags and secrets.
``` release-note
Federation controller manager can consume the federation API server kubeconfig from a file configured via --kubeconfig flag.
If you are upgrading your Cluster Federation components from v1.4.x, please update your `federation-apiserver` and `federation-controller-manager` manifests to the new version:
```
cc @kubernetes/sig-cluster-federation
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Switch federated secret controller to use NamespacedName
To make it cleaner and consistent with other controllers.
cc: @quinton-hoole
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[Federation][init-02] Stop passing command factory to the init command.
Please review only the last commit here. This is based on PR #35856 which will be reviewed independently.
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @nikhiljindal
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[Federation] Add unit tests for `kubefed init`'s certificate generator.
Please review only the last commit here. This is based on PR #35594 which will be reviewed independently.
These are a subset of unit tests for code introduced in PR #35594
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @quinton-hoole
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[Federation][init] Implement `kubefed init` command that performs federation control plane bootstrap.
Please review only the last commit here. This is based on PR #35593 which will be reviewed independently.
I am intentionally not including the unit tests in this PR to better distribute and parallelize reviews. This PR is already big.
I will add a release note separately for this entire feature, so please don't worry too much about the release note here in the PR.
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @quinton-hoole @nikhiljindal
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[Federation][(Un)join-01] Refactor common functions and structs into a util package.
Please review only the last commit here. This is based on PR #35495 which will be reviewed independently.
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @quinton-hoole @nikhiljindal
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[Federation][unjoin-00] Implement `kubefed unjoin` command.
Please review only the last commit here. This is based on PR #35493 which will be reviewed independently.
I will add a release note separately for this entire feature, so please don't worry too much about the release note here in the PR.
Design Doc: PR #34484
cc @kubernetes/sig-cluster-federation @quinton-hoole @nikhiljindal
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Avoid double decoding all client responses
Fixes#35982
The linked issue uncovered that we were always double decoding the response in restclient for get, list, update, create, and patch. That's fairly expensive, most especially for list. This PR refines the behavior of the rest client to avoid double decoding, and does so while minimizing the changes to rest client consumers.
restclient must be able to deal with multiple types of servers. Alter the behavior of restclient.Result#Raw() to not process the body on error, but instead to return the generic error (which still matches the error checking cases in api/error like IsBadRequest). If the caller uses
.Error(), .Into(), or .Get(), try decoding the body as a Status.
For older servers, continue to default apiVersion "v1" when calling restclient.Result#Error(). This was only for 1.1 servers and the extensions group, which we have since fixed.
This removes a double decode of very large objects (like LIST) - we were trying to DecodeInto status, but that ends up decoding the entire result and then throwing it away. This makes the decode behavior specific to the type of action the user wants.
```release-note
The error handling behavior of `pkg/client/restclient.Result` has changed. Calls to `Result.Raw()` will no longer parse the body, although they will still return errors that react to `pkg/api/errors.Is*()` as in previous releases. Callers of `Get()` and `Into()` will continue to receive errors that are parsed from the body if the kind and apiVersion of the body match the `Status` object.
This more closely aligns rest client as a generic RESTful client, while preserving the special Kube API extended error handling for the `Get` and `Into` methods (which most Kube clients use).
```
nikhiljindal