adding missing volume for netdata-otel

[M4itee]

Reason for the change - varlib volume is missing so restarting the pod will create a new instance in the netdata cloud.

@ilyam8 @witalisoft
I tried to do this under one parameter because our values.yaml - not because of laziness but because the values.yaml is quite long so lemme know if hardcoding the varlib volume into 1Gi and making it all under 1 switch makes sense. I can't imagine it going full ever.

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✅ M4itee
❌ Mateusz

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[Copilot]

Pull request overview

This PR updates the Netdata Helm chart’s OpenTelemetry deployment to persist /var/lib/netdata across pod restarts so the agent retains state (e.g., claim identity) instead of reappearing as a new instance in Netdata Cloud.

Changes:

• Add a second PVC (*-otel-varlib) and mount it at /var/lib/netdata in the netdata-otel Deployment.
• Update values.yaml/README wording around OTel persistence, and change the default netdataOpentelemetry.dnsPolicy.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
charts/netdata/values.yaml	Updates netdata-otel defaults/docs for persistence and changes dnsPolicy default.
charts/netdata/templates/netdata-otel/persistentvolumeclaim.yaml	Adds a new *-otel-varlib PVC alongside the existing *-otel-varlog PVC.
charts/netdata/templates/netdata-otel/deployment.yaml	Mounts the new varlib PVC at /var/lib/netdata and wires the new claim into pod volumes.
charts/netdata/README.md	Mirrors the updated values.yaml defaults/text in the generated values table.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

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