Support json logging format

[huww98]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Only one line of log is changed to structured logging, to prove the json format works. We can migrate others in the future.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Like: kubernetes-csi/external-resizer#330

Related:

• Support json logging format external-provisioner#1318

Does this PR introduce a user-facing change?:

Add support for -logging-format=json
Remove klog specific flags according to KEP-2845

KEP-2845: Deprecate klog specific flags in Kubernetes Components

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: huww98
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[k8s-ci-robot]

Hi @huww98. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[xing-yang]

/ok-to-test

[xing-yang]

Can you replace "KEP-2845" in the release notes with a description of what that feature is about?
Also add "KEP-2845" and a link to the KEP in the PR description itself.

[huww98]

Can you replace "KEP-2845" in the release notes with a description of what that feature is about?

Actually already included, that is "Remove klog specific flags". KEP-2845 is just offering more context to the interested reader of the release note. kubernetes-csi/external-resizer#411 contains some more discussion about this change.

Also add "KEP-2845" and a link to the KEP in the PR description itself.

Done