Fix rotate file

[bamboox]

What this PR does / why we need it:
when restart log_file_max_size args invalid

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 #171

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

Fix use --log_file_max_size，Restart after running for a period of time, the log_file_size larger than the set value

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[bamboox]

/assign @tallclair

[neolit123]

does this need a slightly more descriptive error message - e.g. fmt.Errorf("..... could not ....: %v, err)?

[neolit123]

thank you for the PR, i've added one comment above.

also please sign the CLA if you haven't already (see the bot comment)
and under Release note: add a short but descriptive explanation about the fix.

[neolit123]

/check-cla

[tallclair]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bamboox, tallclair

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