[xray] add GOMAXPROCS env in statefulset from limits.cpu values

[gregoryboue]

PR Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• CHANGELOG.md updated
• Title of the PR starts with chart name (e.g. [artifactory])

What this PR does / why we need it:

Settings GOMAXPROCS is a good practice for running go applications in kubernetes.

Customers who are running xray on kubernetes with cgroup v2 can encounter some performance issue due to cgroup v2 cpu management for go application.

For more information see theses post :

• https://blog.kintone.io/entry/2022/03/08/170206#Go
• https://engineering.grab.com/performance-bottlenecks-go-apps

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[gregoryboue]

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[gregoryboue]

recheck

[chukka]

@gregoryboue Thanks for the PR , we would like test it internally and come back on this , Hopefully we would be adding this in next release of Xray (ETA in couple of weeks)

[gregoryboue]

@chukka thanks for the answer, there is one problem with my PR, this only can work if ressource.limitCpu is an integer (for example this won't work : '500m' '1.5'.

I didn't success to manage it and i didn't want to add GOMAXPROCS as chart values.

[chukka]

@gregoryboue Ideally , Can we use automacprocs which automatically set GOMAXPROCS to match Linux container CPU quota
https://pkg.go.dev/go.uber.org/automaxprocs
https://github.com/uber-go/automaxprocs

Till each microservice implements it , it better we have it in chart values via extraEnvVars ,WDYT ?

[gregoryboue]

useless since Xray 3.79 and internal usage of https://github.com/uber-go/automaxprocs