improve koordlet log verbosity

[saintube]

Signed-off-by: saintube saintube@foxmail.com

Ⅰ. Describe what this PR does

improve the log verbosity of koordlet.

For example, when we use Centos 7, we don't expect an error-like log for the cgroup file cpu.burst_us, since this file may not exist on OSs other than Anolis OS.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

reduce misunderstandings when koordlet is deployed with the default log level

Ⅳ. Special notes for reviews

some refactoring may conflict with #328

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

Merging #338 (8d0a149) into main (f89c582) will decrease coverage by 0.03%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #338      +/-   ##
==========================================
- Coverage   64.89%   64.85%   -0.04%     
==========================================
  Files         116      116              
  Lines       11438    11448      +10     
==========================================
+ Hits         7423     7425       +2     
- Misses       3428     3438      +10     
+ Partials      587      585       -2     

Flag	Coverage Δ
unittests	64.85% <50.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/koordlet/metricsadvisor/collector.go	9.69% <0.00%> (ø)
pkg/koordlet/resmanager/cpu_burst.go	76.06% <42.85%> (-1.47%)	⬇️
pkg/koordlet/resmanager/memory_evict.go	72.07% <75.00%> (ø)
pkg/koordlet/reporter/reporter.go	38.05% <100.00%> (ø)
pkg/koordlet/resmanager/cgroup_reconcile.go	86.19% <100.00%> (+0.06%)	⬆️

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[hormes]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

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