[collect] can't send logs to SigNoz Cloud with version 0.15.0 of k8s-infra chart

[LazarPluto]

Hi,
With k8s-infra chart 0.15.0, the logs are not send to the SigNoz Cloud. The metrics and kubernetes events are sent.
With version 0.14.2 (and same values.yaml), the logs are sent.

I am not sure how to debug the issue, so I can compare logs from otel-agent.

0.14.2

kubectl logs -n monitoring signoz-k8s-infra-otel-agent-89nrc | grep -i receiver
{"level":"warn","ts":1769082470.9000118,"caller":"metadata/generated_metrics.go:3097","msg":"[WARNING] `container.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric container.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9000494,"caller":"metadata/generated_metrics.go:3100","msg":"[WARNING] `k8s.node.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric k8s.node.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.900059,"caller":"metadata/generated_metrics.go:3103","msg":"[WARNING] `k8s.pod.cpu.utilization` should not be enabled: This metric will be disabled in a future release. Use metric k8s.pod.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9000976,"caller":"metadata/generated_metrics.go:3097","msg":"[WARNING] `container.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric container.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001064,"caller":"metadata/generated_metrics.go:3100","msg":"[WARNING] `k8s.node.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric k8s.node.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.90011,"caller":"metadata/generated_metrics.go:3103","msg":"[WARNING] `k8s.pod.cpu.utilization` should not be enabled: This metric will be disabled in a future release. Use metric k8s.pod.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001298,"caller":"metadata/generated_metrics.go:3097","msg":"[WARNING] `container.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric container.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.900137,"caller":"metadata/generated_metrics.go:3100","msg":"[WARNING] `k8s.node.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric k8s.node.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001408,"caller":"metadata/generated_metrics.go:3103","msg":"[WARNING] `k8s.pod.cpu.utilization` should not be enabled: This metric will be disabled in a future release. Use metric k8s.pod.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001513,"caller":"metadata/generated_metrics.go:3097","msg":"[WARNING] `container.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric container.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001582,"caller":"metadata/generated_metrics.go:3100","msg":"[WARNING] `k8s.node.cpu.utilization` should not be enabled: WARNING: This metric will be disabled in a future release. Use metric k8s.node.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"warn","ts":1769082470.9001615,"caller":"metadata/generated_metrics.go:3103","msg":"[WARNING] `k8s.pod.cpu.utilization` should not be enabled: This metric will be disabled in a future release. Use metric k8s.pod.cpu.usage instead.","kind":"receiver","name":"kubeletstats","data_type":"metrics"}
{"level":"info","ts":1769082470.9005911,"caller":"container/config.go:92","msg":"`time` log record attribute will be removed in a future release. Switch now using the feature gate.","kind":"receiver","name":"filelog/k8s","data_type":"logs","attribute":"time","feature gate":"filelog.container.removeOriginalTimeField"}
{"level":"info","ts":1769082470.93365,"caller":"adapter/receiver.go:47","msg":"Starting stanza receiver","kind":"receiver","name":"filelog/k8s","data_type":"logs"}
{"level":"info","ts":1769082470.9346013,"caller":"otlpreceiver@v0.109.0/otlp.go:103","msg":"Starting GRPC server","kind":"receiver","name":"otlp","data_type":"traces","endpoint":"0.0.0.0:4317"}
{"level":"info","ts":1769082470.9347107,"caller":"otlpreceiver@v0.109.0/otlp.go:153","msg":"Starting HTTP server","kind":"receiver","name":"otlp","data_type":"traces","endpoint":"0.0.0.0:4318"}
{"level":"info","ts":1769082471.1356547,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/0.log"}
{"level":"info","ts":1769082471.1357284,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/casino-api/0.log"}
{"level":"info","ts":1769082471.135752,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/0.log"}
{"level":"info","ts":1769082471.1358194,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/0.log"}
{"level":"info","ts":1769082471.135857,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/0.log"}
{"level":"info","ts":1769082471.1365182,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/default_prometheus-operator-579c549f7c-59h9z_1cd43f6a-6d7e-4b32-842b-6ad5ced6a77d/prometheus-operator/0.log"}
{"level":"info","ts":1769082471.1365564,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/monitoring_signoz-k8s-infra-otel-agent-89nrc_cf862bf9-31f6-40dc-ba7a-71af8129c1a6/signoz-k8s-infra-otel-agent/0.log"}
{"level":"info","ts":1769082471.136578,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/vpa_goldilocks-controller-55c758c6dd-9gndm_ec891ead-0f82-4455-b601-80b56fa2ae99/goldilocks/0.log"}
{"level":"info","ts":1769082471.1372185,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/vpa_goldilocks-dashboard-84f44f47f4-sxbfq_9d8278eb-28e7-4e1d-ab1c-0de98766d694/goldilocks/0.log"}
{"level":"info","ts":1769082471.1372685,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/vpa_vpa-recommender-7fbcd48896-bh5kv_7fb18132-ab22-4109-8ea9-e4017836b0bd/vpa/0.log"}
{"level":"info","ts":1769085085.1359441,"caller":"fileconsumer/file.go:256","msg":"Started watching file","kind":"receiver","name":"filelog/k8s","data_type":"logs","component":"fileconsumer","path":"/var/log/pods/REDACTED/0.log"}

0.15.0

% kubectl logs -n monitoring signoz-k8s-infra-otel-agent-5znfs --tail=1000 | grep -i "receiver"
{"level":"info","ts":"2026-01-22T08:55:29.511Z","caller":"otlpreceiver@v0.139.0/otlp.go:120","msg":"Starting GRPC server","resource":{"service.instance.id":"c5bdbb3c-de19-4857-83c4-9c6de5b0cfb5","service.name":"otelcol-contrib","service.version":"0.139.0"},"otelcol.component.id":"otlp","otelcol.component.kind":"receiver","endpoint":"[::]:4317"}
{"level":"info","ts":"2026-01-22T08:55:29.511Z","caller":"otlpreceiver@v0.139.0/otlp.go:178","msg":"Starting HTTP server","resource":{"service.instance.id":"c5bdbb3c-de19-4857-83c4-9c6de5b0cfb5","service.name":"otelcol-contrib","service.version":"0.139.0"},"otelcol.component.id":"otlp","otelcol.component.kind":"receiver","endpoint":"[::]:4318"}

The version of opentelemetry collector was upgraded to 0.139.0 in the latest chart.

[maxtheaviator]

The SigNoz k8s-infra Helm chart (v0.15.0) hardcodes the gRPC authentication header as signoz-access-token in its Go template. This is a deprecated header name — SigNoz Cloud's backend has migrated to signoz-ingestion-key.

I guess here: _config.tpl

Deprecation Notice:
https://signoz.io/docs/ingestion/signoz-cloud/overview/#opentelemetry-collector-configuration-1

Fix which works for me at the moment is setting the headers in the helm values manually:

        apiKeyExistingSecretName: "signoz-ingestion-key"
        apiKeyExistingSecretKey: "signoz-ingestion-key"
        otelAgent:
          config:
            exporters:
              otlp:
                headers:
                  signoz-ingestion-key: ${env:SIGNOZ_API_KEY}
        otelDeployment:
          config:
            exporters:
              otlp:
                headers:
                  signoz-ingestion-key: ${env:SIGNOZ_API_KEY}