Install and configure Linkerd monitoring: NRDOT with Helm

This page installs the NRDOT Collector using Helm, configures it to scrape Linkerd proxy and control plane metrics, and verifies that data is flowing to New Relic. Expect this to take about 15 minutes.

Compatibility and requirements

Supported

Kubernetes cluster (EKS, GKE, AKS, or self-managed) with kubectl configured against it
Linkerd installed and healthy (linkerd check passes)
Helm-managed cluster configuration

You need

A New Relic ingest license key
The base Kubernetes OpenTelemetry Helm installation completed
Network connectivity to New Relic OTLP endpoints
Injection enabled on the namespaces you want to observe. If it isn't, annotate and restart them:
bash
```
$kubectl annotate namespace <YOUR_NAMESPACE> linkerd.io/inject=enabled
$kubectl rollout restart deployment -n <YOUR_NAMESPACE>
```

ヒント

The NRDOT Helm chart bundles kube-state-metrics and enables it by default, so your Kubernetes workload entities are already correlated with Linkerd metrics. No extra setup needed.

Install

Set your cluster name in your values.yaml.
```
deployment:
  envs:
    - name: OTEL_RESOURCE_ATTRIBUTES
      value: "k8s.cluster.name=<YOUR_CLUSTER_NAME>"
```

Add the Linkerd scrape config and processors to deployment.configMap.extraConfig in your values.yaml.

receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: 'linkerd-controller'
          kubernetes_sd_configs:
            - role: pod
              namespaces: { names: ['linkerd', 'linkerd-viz'] }
          relabel_configs:
            - { source_labels: [__meta_kubernetes_pod_container_port_name], action: keep, regex: admin-http }
            - { source_labels: [__meta_kubernetes_pod_container_name], target_label: component }
            - { source_labels: [__meta_kubernetes_namespace], target_label: namespace }
            - { source_labels: [__meta_kubernetes_pod_name], target_label: pod }
        - job_name: 'linkerd-proxy'
          kubernetes_sd_configs: [{ role: pod }]
          relabel_configs:
            - { source_labels: [__meta_kubernetes_pod_container_name, __meta_kubernetes_pod_container_port_name, __meta_kubernetes_pod_label_linkerd_io_control_plane_ns], action: keep, regex: ^linkerd-proxy;linkerd-admin;linkerd$$ }
            - { source_labels: [__meta_kubernetes_namespace], target_label: namespace }
            - { source_labels: [__meta_kubernetes_pod_name], target_label: pod }
            - { source_labels: [__meta_kubernetes_pod_label_linkerd_io_control_plane_ns], target_label: linkerd_control_plane_ns }
            - { source_labels: [__meta_kubernetes_pod_label_linkerd_io_control_plane_component], target_label: linkerd_control_plane_component }

processors:
  resource/strip_service:
    attributes:
      - { key: service.name, action: delete }
      - { key: service.instance.id, action: delete }
  transform/k8s:
    metric_statements:
      - context: datapoint
        statements:
          - set(attributes["k8s.namespace.name"], attributes["namespace"]) where attributes["namespace"] != nil
          - set(attributes["k8s.pod.name"], attributes["pod"]) where attributes["pod"] != nil
          - delete_key(attributes, "instance")
  transform/deployment:
    metric_statements:
      - context: datapoint
        statements:
          - set(attributes["k8s.deployment.name"], attributes["k8s.pod.name"]) where attributes["k8s.deployment.name"] == nil and attributes["k8s.pod.name"] != nil
          - replace_pattern(attributes["k8s.deployment.name"], "-[a-z0-9]+-[a-z0-9]+$", "") where attributes["k8s.deployment.name"] == attributes["k8s.pod.name"]
  transform/metadata_nullify:
    metric_statements:
      - context: metric
        statements:
          - set(description, "")
          - set(unit, "")
  filter/drop_unused:
    error_mode: ignore
    metrics:
      metric:
        - 'name == "rustls_info" or name == "proxy_build_info"'
        - 'name == "scrape_series_added"'
        - 'IsMatch(name, "stack_(poll|create|drop)_total") or name == "stack_poll_total_ms"'
        - 'IsMatch(name, "tokio_rt_.*")'
        - 'IsMatch(name, "(inbound|outbound)_http_.*_frame_size_bytes")'
        - 'IsMatch(name, "(inbound|outbound)_tcp_detect_http_duration_seconds")'
        - 'IsMatch(name, "outbound_tcp_balancer_queue_.*")'
        - 'name == "scrape_duration_seconds" or name == "scrape_samples_scraped" or name == "scrape_samples_post_metric_relabeling"'

pipelines:
  metrics/linkerd:
    receivers: [prometheus]
    processors: [memory_limiter, resource/strip_service, transform/k8s, transform/deployment, transform/metadata_nullify, filter/drop_unused, resource/newrelic, batch]
    exporters: [otlp_http/newrelic]

pipelines: must be defined at the root of extraConfig, not nested under service:. The Helm chart template maps extraConfig.pipelines into service.pipelines.

Configure

Update the values.yaml file as per the following table:

Parameter	Description
`OTEL_RESOURCE_ATTRIBUTES`	Set `k8s.cluster.name` to your Kubernetes cluster name for identification in New Relic
`filter/drop_unused`	Drops low-value Linkerd proxy metrics by default. Remove entries from this list to re-enable them

Apply the updated values to your running Helm release.

bash

$helm upgrade nr-k8s-otel-collector newrelic/nr-k8s-otel-collector \
>  --namespace newrelic --reuse-values -f values.yaml

Find your data

Go to one.newrelic.com > All capabilities > All entities.
Search for your cluster name.
Select your Linkerd entity to open the built-in dashboard.

The built-in dashboard covers request rate, latency p50/p95/p99, success rate, TCP connections, mTLS certificate status, control plane health, and meshed pod inventory. For detailed information, refer to Find Linkerd data documentation.

Linkerd distributed tracing with OpenTelemetry

Enable proxy trace export and instrument your application pods to correlate mesh spans with APM traces.

Collect Linkerd proxy logs

Optionally collect linkerd-proxy sidecar container logs.

Metrics reference

Full list of Linkerd metrics and resource attributes collected by the OTel Collector.