Fix the problem with starting the master with empty cache

[zhshishkin]

We faced the problem when master deleted some of labels on start. Sometimes he doesn't gets NodeFeatures when they are present in cluster because of empty cache in informer

[linux-foundation-easycla]

• ✅login: IbirbyZh / (2f9801b)

The committers listed above are authorized under a signed CLA.

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[k8s-ci-robot]

Hi @IbirbyZh. Thanks for your PR.

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[marquiz]

Thank you @IbirbyZh for the patch!
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: IbirbyZh, marquiz

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[marquiz]

@IbirbyZh please sign the CLA so that we can get the patch merged

/cherry-pick release-0.16

[k8s-infra-cherrypick-robot]

@marquiz: once the present PR merges, I will cherry-pick it on top of release-0.16 in a new PR and assign it to you.

In response to this:

@IbirbyZh please sign the CLA so that we can get the patch merged

/cherry-pick release-0.16

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[marquiz]

/assign @PiotrProkop

[PiotrProkop]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 6c2a333b77461df889f10db4de46c2d31d6c0391

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 39.50%. Comparing base (4628ea8) to head (2f9801b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1739      +/-   ##
==========================================
- Coverage   39.51%   39.50%   -0.01%     
==========================================
  Files          80       80              
  Lines        7160     7161       +1     
==========================================
  Hits         2829     2829              
- Misses       4071     4072       +1     
  Partials      260      260              

Files	Coverage Δ
pkg/nfd-master/nfd-api-controller.go	9.01% <0.00%> (-0.08%)	⬇️

[k8s-infra-cherrypick-robot]

@marquiz: new pull request created: #1740

In response to this:

@IbirbyZh please sign the CLA so that we can get the patch merged

/cherry-pick release-0.16

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.