koordlet: add metrics for kubelet and resource executor

[zwzhang0107]

Ⅰ. Describe what this PR does

#1867

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

curl http://localhost:9316/metrics

koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="0.001"} 64
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="0.004"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="0.016"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="0.064"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="0.256"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="1.024"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="4.096"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/configz",verb="get",le="+Inf"} 65
koordlet_kubelet_request_duration_seconds_sum{code="200",path="/configz",verb="get"} 0.03827992899999999
koordlet_kubelet_request_duration_seconds_count{code="200",path="/configz",verb="get"} 65
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="0.001"} 0
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="0.004"} 17
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="0.016"} 20
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="0.064"} 20
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="0.256"} 20
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="1.024"} 20
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="4.096"} 20
koordlet_kubelet_request_duration_seconds_bucket{code="200",path="/pods/",verb="get",le="+Inf"} 20
koordlet_kubelet_request_duration_seconds_sum{code="200",path="/pods/",verb="get"} 0.05541508399999999
koordlet_kubelet_request_duration_seconds_count{code="200",path="/pods/",verb="get"} 20

# HELP koordlet_resource_update_duration_milliseconds time duration of resource update such as cgroup files
# TYPE koordlet_resource_update_duration_milliseconds histogram
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="0.01"} 0
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="0.04"} 74
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="0.16"} 145
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="0.64"} 146
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="2.56"} 146
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="10.24"} 146
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="40.96"} 146
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="163.84"} 146
koordlet_resource_update_duration_milliseconds_bucket{status="success",type="cgroup",le="+Inf"} 146
koordlet_resource_update_duration_milliseconds_sum{status="success",type="cgroup"} 7.001778000000003
koordlet_resource_update_duration_milliseconds_count{status="success",type="cgroup"} 146

Ⅳ. Special notes for reviews

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

Attention: Patch coverage is 72.34043% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 67.53%. Comparing base (b634779) to head (6cb8824).
Report is 5 commits behind head on main.

Files	Patch %	Lines
pkg/koordlet/metrics/kubelet.go	0.00%	4 Missing ⚠️
pkg/koordlet/resourceexecutor/executor.go	75.00%	1 Missing and 2 partials ⚠️
pkg/koordlet/metrics/resource_executor.go	0.00%	2 Missing ⚠️
pkg/koordlet/resourceexecutor/resctrl_updater.go	0.00%	2 Missing ⚠️
pkg/koordlet/resourceexecutor/updater.go	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1913      +/-   ##
==========================================
- Coverage   67.53%   67.53%   -0.01%     
==========================================
  Files         413      415       +2     
  Lines       46229    46257      +28     
==========================================
+ Hits        31223    31238      +15     
- Misses      12742    12750       +8     
- Partials     2264     2269       +5     

Flag	Coverage Δ
unittests	67.53% <72.34%> (-0.01%)	⬇️

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[saintube]

/lgtm

[zwzhang0107]

/appprove

[zwzhang0107]

/approve

[saintube]

/lgtm

[zwzhang0107]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zwzhang0107

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• pkg/koordlet/OWNERS [zwzhang0107]

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[jasonliu747]

/lgtm
/approve