Ingesting logs using Grafana Loki push API

You can receive logs from Grafana Agent or Promtail using the OpenTelemetry Collector Loki receiver and then export the data to Uptrace using the OpenTelemetry protocol.

• OpenTelemetry Collector
• Loki receiver

OpenTelemetry Collector

OpenTelemetry Collector is a proxy service between your application and a distributed tracing tool. Collector receives telemetry data, transforms the data, and then exports it to tracing tools that can store the data permanently.

Collector can also act as an agent that pulls telemetry data from monitored systems, for example, Redis or filesystem metrics.

Loki receiver

The Loki receiver implements the Loki push api as specified here. It allows Promtail instances to specify the Open telemetry Collector as their lokiAddress.

To receive logs from Promtail and export them to Uptrace, add the following to your OpenTelemetry Collector configuration file:

receivers:
  loki:
    protocols:
      http:
      grpc:
    use_incoming_timestamp: true

exporters:
  otlp/uptrace:
    endpoint: otlp.uptrace.dev:4317
    headers:
      uptrace-dsn: 'https://token@api.uptrace.dev/project_id'

processors:
  batch:

service:
  pipelines:
    logs:
      receivers: [loki]
      processors: [batch]
      exporters: [otlp/uptrace]

receivers:
  loki:
    protocols:
      http:
      grpc:
    use_incoming_timestamp: true

exporters:
  otlp/uptrace:
    endpoint: http://localhost:14317
    tls:
      insecure: true
    headers:
      uptrace-dsn: 'http://project2_secret_token@localhost:14318?grpc=14317'

service:
  pipelines:
    logs:
      receivers: [loki]
      processors: [batch]
      exporters: [otlp/uptrace]

You can then configure Promtail to export data to OpenTelemetry Collector:

clients:
  - url: http://otelcol:3500/loki/api/v1/push

• OpenTelemetry Logs
• Structured logging