signalfx/splunk-otel-collector-chart splunk-otel-collector-0.157.0

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This Splunk OpenTelemetry Collector for Kubernetes release adopts the Splunk OpenTelemetry Collector v0.157.0.

🛑 Breaking changes 🛑

• chart: Rename all kubeletstats receiver references to kubelet_stats (#2515)
  The kubeletstats alias has been deprecated in favor of kubelet_stats in the chart-generated configuration.
  Any Helm values or overrides that reference kubeletstats (for example, *.config.receivers.kubeletstats
  or pipelines that list kubeletstats as a receiver) must be updated to use kubelet_stats.
  The chart will fail to be installed or upgraded if the deprecated alias is still referenced.

💡 Enhancements 💡

• agent: Enable compaction by default for the persistent queue file storage extension. (#79002)
  Prevents unbounded disk growth after traffic spikes. Compaction triggers when the file is ≥200 MiB and live data has dropped to ≤100 MiB and on collector start.
  Override configuration via agent.config.extensions.file_storage/persistent_queue.compaction.
• chart: Set mounted Splunk Secret files to mode 0440 by default and set fsGroup: 999 on Linux Collector pods. Both settings remain configurable. (#2441)
• chart: Add the Splunk access token header to the default OpAMP HTTP forwarder egress config. (#4437)
• chart: Add an opt-in setting to read Splunk tokens from mounted Secret files. (#2441)
  Enable featureGates.mountSplunkSecretAsFile to use this mode with either a chart-created or existing Secret. This option is disabled by default and is not currently supported with distribution: gke/autopilot.
• chart: Add agent.tokenPassthrough and gateway.tokenPassthrough options to enable passthrough of the client's authentication token to Splunk Observability and OpAMP. (#2509)
  When enabled, the collector propagates the caller's X-SF-Token to Splunk Observability
  (via headers_setter) and to the OpAMP HTTP forwarder egress. Defaults preserve today's
  behavior: agent.tokenPassthrough=false and gateway.tokenPassthrough=true.
• chart: Bump TargetAllocator to 0.156.0 in helm-charts/splunk-otel-collector/Chart.yaml (#2503)
• chart: Bump obi to 0.11.0 in helm-charts/splunk-otel-collector/Chart.yaml (#2510)
• operator: Bump dotnet to v1.15.0 in helm-charts/splunk-otel-collector/values.yaml (#2518)
• operator: Bump java-csa to v2.29.0 in helm-charts/splunk-otel-collector/values.yaml (#2485)
• operator: Bump nodejs to v4.10.0 in helm-charts/splunk-otel-collector/values.yaml (#2517)
• operator: Bump operator to 0.120.0 in helm-charts/splunk-otel-collector/Chart.yaml (#2500)

🧰 Bug fixes 🧰

• chart: Allow original OpenTelemetry subchart names in values.schema.json validation. (#2493)
• chart: Pin Linux-only workloads to Linux nodes, disable service account token mounting for the secret validation hook, and reject Windows workloads on EKS Fargate. (#2522)