Add grafana example for metrics

[ninjadq]

add json file for grafana

Signed-off-by: DQ dengq@vmware.com

[codecov]

Codecov Report

Merging #14504 (06f14ec) into master (b445683) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #14504      +/-   ##
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- Coverage   65.60%   65.57%   -0.03%     
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  Files         921      925       +4     
  Lines       69224    69462     +238     
  Branches     2037     2101      +64     
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+ Hits        45413    45550     +137     
- Misses      19888    19962      +74     
- Partials     3923     3950      +27     

Flag	Coverage Δ
unittests	65.57% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
...av/replication/total-replication-page.component.ts	37.93% <0.00%> (-25.71%)	⬇️
...portal/src/app/services/skinable-config.service.ts	54.54% <0.00%> (-25.46%)	⬇️
src/lib/cache/util.go	73.68% <0.00%> (-15.79%)	⬇️
...rc/app/base/harbor-shell/harbor-shell.component.ts	62.16% <0.00%> (-3.97%)	⬇️
src/portal/src/app/app.component.ts	76.74% <0.00%> (-2.75%)	⬇️
src/pkg/exporter/project_collector.go	28.98% <0.00%> (-2.01%)	⬇️
...shared/components/navigator/navigator.component.ts	39.21% <0.00%> (-1.61%)	⬇️
...se/project/p2p-provider/policy/policy.component.ts	47.08% <0.00%> (-0.20%)	⬇️
src/pkg/exporter/cache.go	0.00% <0.00%> (ø)
src/pkg/exporter/collector.go	80.00% <0.00%> (ø)
... and 22 more

[a-mccarthy]

@ninjadq Is this dashboard meant to be an example that users can use to get started using metrics with Harbor? If so, it might also be useful to add a link to this example from the metrics docs once this is merged.

Is this something that will be maintained/tested?

[ninjadq]

hi @a-mccarthy, yes it is the example for user to get started with. I think it can be added to doc also. Thanks for mention this