Fluentd metric "fluentd_router_records_total" is missing worker_id label

[berdanA]

Describe the bug

Describe the bug:
Fluentd metric "fluentd_router_records_total" is missing worker_id label on the aggregated_metrics endpoint which leads to problems when scraped by prometheus:
{"time":"2025-09-24T09:53:43.708254288Z","level":"WARN","source":"scrape.go:1884","msg":"Error on ingesting samples with different value but same timestamp","component":"scrape manager","scrape_pool":"serviceMonitor/logging/logging-fluentd-metrics/0","target":{},"num_dropped":243}`

To Reproduce

I deployed latest logging-operator chart version and enabled fluentd with a serviceMonitor:

fluentd:
  metrics:
    prometheusRules: false
     serviceMonitor: true

Expected behavior

I would expect the "fluentd_router_records_total" metric to have a worker_id label as all other metrics.
fluentd_router_records_total{flow="@d15dc1e90fc1d60534f40b874312ada1",id="flow:foo-bar:logs"} 1.0

Your Environment

- Fluentd version: 1.17.1
- Logging Operator (Fluentd image): ghcr.io/kube-logging/logging-operator/fluentd:5.2.0-full
- Logging Operator chart version: 5.2.0
- Package version: using container image
- Operating system: Linux
- Kernel version: 6.8.0-60-generic
- Kubernetes version: v1.32.8+rke2r1
- Deployment method: BanzaiCloud Logging Operator Helm chart
- Configuration: Generated by Logging Operator (custom `Flow` and `Output` CRDs)

Your Configuration

-

Your Error Log

`{"time":"2025-09-24T09:53:43.708254288Z","level":"WARN","source":"scrape.go:1884","msg":"Error` on ingesting samples with different value but same timestamp","component":"scrape manager","scrape_pool":"serviceMonitor/logging/logging-fluentd-metrics/0","target":{},"num_dropped":243}`

`fluentd_router_records_total{flow="@d15dc1e90fc1d60534f40b874312ada1",id="flow:foo-bar:logs"} 1.0`

Additional context

No response

[Watson1978]

At least, Fluentd doesn't provide fluentd_router_records_total metrics.

Seems that the metrics will be introduced by https://github.com/kube-logging/fluent-plugin-label-router

Ref.

• Fluentd metric "fluentd_router_records_total" is missing worker_id label kube-logging/logging-operator#2128 (comment)
• https://github.com/kube-logging/fluent-plugin-label-router/blob/9c3ae6c67ececce3bb0e00aef688c5ece7b2a770/lib/fluent/plugin/out_label_router.rb#L80

So, I think this is an issue in fluent-plugin-label-router.