Support structured logging

[saku3]

What type of PR is this?

/kind feature

What this PR does / why we need it:

In this PR I have added JSON logging.
With this change, it is now possible to output the logs of the external-resizer container in JSON format.
Running the container with the --logging-format=json option will output the logs in JSON format.

In addition, I've modified the log messages based on the following guideline:
https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/migration-to-structured-logging.md

I’ve update the klog functions in use according to the guidelines provided below, and I've confirmed that they pass the
logcheck tests:https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/migration-to-structured-logging.md#change-log-functions

logcheck cmd/csi-resizer/main.go 
logcheck ./pkg/util/
logcheck ./pkg/resizer/ 
logcheck ./pkg/csi/    
logcheck ./pkg/controller/
logcheck ./pkg/features/ 

related PR:kubernetes-csi/livenessprobe#202

Special notes for your reviewer:

# The logs below were outputted because the program was running on MacOS.
$ go run cmd/csi-resizer/main.go --logging-format=json
{"ts":1694049594780.344,"caller":"csi-resizer/main.go:105","msg":"Version","v":0,"version":"unknown"}
{"ts":1694049594780.369,"caller":"csi-resizer/main.go:128","msg":"Failed to create cluster config","err":"unable to load in-cluster configuration, KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT must be defined"}
...

$ go run cmd/csi-resizer/main.go 
I0907 10:19:16.001980   70980 main.go:105] "Version" version="unknown"
E0907 10:19:16.002069   70980 main.go:128] "Failed to create cluster config" err="unable to load in-cluster configuration, KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT must be defined"
...

Does this PR introduce a user-facing change?:

Added support structured logging

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: saku3 / name: saku (1e9b0ad)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @saku3. 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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[bells17]

/ok-to-test

[jsafrane]

Exit is missing here, klog.Fatal would exit but ErrorS does not.

[saku3]

I've add klog.FlushAndExit. Could you please review it again?

[jsafrane]

/lgtm
@gnufied can you please take a look?

[saku3]

@jsafrane

I've resolved the conflicts and pushed the changes according to the guidelines provided below. Could you please give it another look and approve if everything is fine?

https://github.com/kubernetes/community/blob/master/contributors/guide/github-workflow.md#4-keep-your-branch-in-sync

[gnufied]

/lgtm
/approve

[jsafrane]

/retest

[jsafrane]

/retest
It looks unrelated to this PR...

[saku3]

I'm getting the same error on multiple PRs in other repositories.

• external-snapshotter
• external-attacher
• external-provisioner

The failing tests are as follows
https://github.com/kubernetes/kubernetes/blob/56f330493cf592ac0c9c9b9d35e8c9f69c45ab33/test/e2e/storage/testsuites/provisioning.go#L452

The error is identical.

{ failed [FAILED] Filesystem resize failed when restoring from snapshot to PVC with larger size. Restored fs size: 299853492224 bytes is not larger than Restored fs size: 299853492224 bytes is not larger than origin fs size: 299853492224 bytes.
HINT: Your driver needs to check the volume in NodeStageVolume and resize fs if needed.
HINT: For an example patch see: https://github.com/kubernetes/cloud-provider-openstack/pull/1563/files
Expected
    <int>: 299853492224
to be >
    <int>: 299853492224
In [It] at: test/e2e/storage/testsuites/provisioning.go:491 @ 10/02/23 18:08:27.298
}

[saku3]

Related to OSS issue: kubernetes/kubernetes#120997

[saku3]

@jsafrane @gnufied

Sorry to bother you again. I've resolved the conflicts and pushed the changes. Could you please give it another look and approve if everything is fine?

[jsafrane]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gnufied, jsafrane, saku3

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• OWNERS [gnufied,jsafrane]

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