Automatic merge from submit-queue (batch tested with PRs 57211, 56150, 56368, 56271, 55957). 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>.
pkg/controller/garbagecollector/garbagecollector.go: fix string format
**What this PR does / why we need it**:
This PR fixes broken formatting in the warning message by using appropriate function:
> W1121 13:13:39.359283 19160 garbagecollector.go:601] failed to discover preferred resources: %vGet https://127.0.0.1:37983/api: dial tcp 127.0.0.1:37983: getsockopt: connection refused
**Special notes for your reviewer**:
This change was introduced in #55259
**Release note**:
```release-note
NONE
```
PTAL @ironcladlou
CC @simo5
Remove faulty diff detection logic from GC sync which leads to a race
condition: If the GC's discovery client is returning a fully up to date
view of server resources during the very first GC sync, the sync
function will never sync monitors or reset the REST mapper unless
discovery changes again. This causes REST mapping to fail for any custom
types already present in discovery.
Automatic merge from submit-queue (batch tested with PRs 55908, 55829, 55293, 55653, 55665). 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>.
[bug fix] TestCascadingDeletion during pull-kubernetes-unit-test flaky
**What this PR does / why we need it**:
fix pull-kubernetes-unit-test flaky.
```
go test -v k8s.io/kubernetes/test/integration/garbagecollector -run TestCascadingDeletion$
panic: close of closed channel
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:58 +0x111
/usr/local/go/src/runtime/panic.go:491 +0x283
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/graph_builder.go:259 +0xb80
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:123 +0x39
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:211 +0x20f
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:133 +0x5e
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:134 +0xbd
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:88 +0x4d
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:172 +0xd9
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/integration/garbagecollector/garbage_collector_test.go:268 +0xc9
from junit_3a3d564eebb1750e5c904cc525d117617fc0af51_20171113-090812.xml
```
**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#55652
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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.
For 1.8 this will be off by default. In 1.9 it will be on by default.
Add tests and rename some fields to use the `chunking` terminology.
Note that the pager may be used for other things besides chunking.
Add a feature gate in the apiserver to control whether paging can be
used. Add controls to the storage factory that allow it to be disabled
per resource. Use a JSON encoded continuation token that can be
versioned. Create a 410 error if the continuation token is expired.
Adds GetContinue() to ListMeta.
Improve GC discovery sync performance by only syncing when discovered
resource diffs are detected. Before, the GC worker pool was shut down
and monitors resynced unconditionally every sync period, leading to
significant processing delays causing test flakes where otherwise
reasonable GC timeouts were being exceeded.
Related to https://github.com/kubernetes/kubernetes/issues/49966.
Automatic merge from submit-queue (batch tested with PRs 49237, 49656, 49980, 49841, 49899)
GC shouldn't send empty patch
The scope of the `if` statement was wrong, causing GC to sometimes send empty patch.
Found this bug while investigating https://github.com/kubernetes/kubernetes/issues/49966.
Automatic merge from submit-queue (batch tested with PRs 50029, 48517, 49739, 49866, 49782)
Update generated deepcopy code
**What this PR does / why we need it**:
In generated deepcopy code, the method names in comments do not match the real method names.
**Which issue this PR fixes**: fixes#49755
**Special notes for your reviewer**:
/assign @sttts @caesarxuchao
**Release note**:
```release-note
NONE
```
Enhance the garbage collector to periodically refresh the resources it
monitors (via discovery) to enable custom resource definition GC.
This implementation caches Unstructured structs for any kinds not
covered by a shared informer. The existing meta-only codec only supports
compiled types; an improved codec which supports arbitrary types could
be introduced to optimize caching to store only metadata for all
non-informer types.
Automatic merge from submit-queue (batch tested with PRs 48224, 45431, 45946, 48775, 49396)
[client-go] Fake Dynamic Client
This commit converts `"k8s.io/client-go/dynamic".Client` to an interface, and implements fake versions of both `ClientPool` and `Client`. This allows components which make uses of these clients to be tested in the same way that clientset-based components can be tested, using the standard `testing.Fake` machinery.
**Release note**:
```release-note
NONE
```
This adds an interface form of dynamic.Client and
dynamic.ResourceClient, making those two follow the general client
conventions: `Interface` is an interface, and `Client` is the concrete
implementation. `ClientPool` retains it's interface status.
This allows us to create a fake implemenation of dyanmic.Interface,
dynamic.ResourceInterface, and dynamic.ClientPool for testing.
The loop should use 'continue' not 'break', otherwise removeFinalizer()
not only removes "orphaningFinalizer" from its finalizers list but
also removes others.
Automatic merge from submit-queue (batch tested with PRs 47000, 47188, 47094, 47323, 47124)
GC should retry on patch error
Fixing https://github.com/kubernetes/kubernetes/issues/46998.
This is fixing a bug, so applying the 1.7 milestone.
Allow the list of resources the garbage collector controller should
ignore to be customizable, so downstream integrators can add their own
resources to the list, if necessary.
Automatic merge from submit-queue (batch tested with PRs 40055, 42085, 44509, 44568, 43956)
Fix gofmt errors
**What this PR does / why we need it**:
There were some gofmt errors on master. Ran the following to fix:
```
hack/verify-gofmt.sh | grep ^diff | awk '{ print $2 }' | xargs gofmt -w -s
```
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: none
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 39807, 37505, 39844, 39525, 39109)
Made cache.Controller to be interface.
**What this PR does / why we need it**:
#37504
