AttachableVolumePlugin CanAttach() method for attachable check

Update doc.go import for staging/src/k8s.io/api/storage/v1/doc.go

Updated OWNERS files to include link to docs

kubeadm: refactor JoinConfigFileAndDefaultsToInternalConfig

fix shellcheck in csi-api

Reduce contention in cacher by eliminating sync.Pool

Currently JoinConfigFileAndDefaultsToInternalConfig is doing a couple of
different things depending on its parameters. It:

- loads a versioned JoinConfiguration from an YAML file.
- returns defaulted JoinConfiguration allowing for some overrides.

In order to make code more manageable, the following steps are taken:

- Introduce LoadJoinConfigurationFromFile, which loads a versioned
  JoinConfiguration from an YAML file, defaults it (both dynamically and
  statically), converts it to internal JoinConfiguration and validates it.

- Introduce DefaultedJoinConfiguration, which returns defaulted (both
  dynamically and statically) and verified internal JoinConfiguration.
  The possibility of overwriting defaults via versioned JoinConfiguration is
  retained.

- Re-implement JoinConfigFileAndDefaultsToInternalConfig to use
  LoadJoinConfigurationFromFile and DefaultedJoinConfiguration.

- Replace some calls to JoinConfigFileAndDefaultsToInternalConfig with calls to
  either LoadJoinConfigurationFromFile or DefaultedJoinConfiguration where
  appropriate.

- Rename JoinConfigFileAndDefaultsToInternalConfig to the more appropriate name
  LoadOrDefaultJoinConfiguration.
Signed-off-by: Rostislav M. Georgiev <rostislavg@vmware.com>

KUBE_JUNIT_REPORT_DIR fixes

fix --local panic in set commands

Bump debian-* base image versions to latest

move pkg/kubelet/apis/well_known_labels.go to staging/src/k8s.io/api/core/v1/

Add check-file-in-alphabetical-order for cleanup

ControllerRef creation through factory function

Fix #73479 AWS NLB target groups missing tags

Update CudaVectorAdd test image to be built with Cuda10 docker image.

kubeadm: do not create etcd datastore if we are in dryrun mode

Use ioutil.TempDir for temporary dir creation

The previous version of CudaVectorAdd test image can still be used
in our testing. A later change will extend the existing gpu e2e tests
to run pods with two containers. One with CudaVectorAdd version1 and
the other with CudaVectorAdd version2 so that we can test both
Cuda versions.

Add missing testcases

`elbv2.AddTags` doesn't seem to support assigning the same set of
tags to multiple resources at once leading to the following error:
  Error adding tags after modifying load balancer targets:
  "ValidationError: Only one resource can be tagged at a time"

This can happen when using AWS NLB with multiple listeners pointing
to different node ports.

When k8s creates a NLB it creates a target group per listener along
with installing security group ingress rules allowing the traffic to
reach the k8s nodes.

Unfortunately if those target groups are not tagged, k8s will not
manage them, thinking it is not the owner.

This small changes assigns tags one resource at a time instead of
batching them as before.
Signed-off-by: Brice Figureau <brice@daysofwonder.com>

kubeadm: improve ux on infoMsg kubeconfig

Support make test WHAT=path/to/pkg/...

Fix kubemark windows num nodes

Add image for sample-device-plugin

Switch WaitForCertificate to informers to avoid broken watches

kubelet: set low oom_score_adj for containers in critical pods

Importing the latest json patch and set the accumulated copy size limit