fixed duplicate counting in CPU graphs

[takuyaymd]

Description:

CPU resource graph on each dashboard was summing pod-wide metrics and metrics for each container, causing the graph to count approximately twice as much.
This fix adds image!="", and only container totals will be counted.

Related Issue:

Versions:

• Go Version: 1.20.3
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 2.0.9

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

(Suggestion) These queries set container="${Replicaset}", so if users insert their own sidecar containers, they will not be able to see the exact resource for the entire POD.
I believe the workaround is to either remove the container specification and replace it with image="" or allow the user to select the container aggregate on the dashboard.

[hlts2]

Thank you. LGTM 👍

[kpango]

@all-contributors please add @takuyaymd for maintenance

[allcontributors]

@kpango

I've put up a pull request to add @takuyaymd! 🎉

[kpango]

LGTM