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Grafana Alloy

This configuration scrapes Prometheus metrics, moves them into an OTLP flow, and delivers them to the DDOSCOM Eyenode gateway with OAuth 2.0.

Before you start

Section titled “Before you start”

Define OTEL_GATEWAY_ENDPOINT, OTEL_GATEWAY_OAUTH_TOKEN_URL, OTEL_GATEWAY_OAUTH_CLIENT_ID, and OTEL_GATEWAY_OAUTH_CLIENT_SECRET in the Alloy process environment. Get the secret from Secrets in the Eyenode Dashboard, then see the get-started guide for the remaining values and secure handling.

Configuration

Section titled “Configuration”

Save this file as config.alloy. Replace node_exporter:9100 with your environment’s Prometheus endpoint if needed.

logging {
  level  = "info"
  format = "logfmt"
}


prometheus.scrape "node" {
  targets = [
    { "__address__" = "node_exporter:9100" },
  ]
  scrape_interval = "10s"
  forward_to = [otelcol.receiver.prometheus.otel_gateway_ddoscom_prometheus.receiver]
}


otelcol.auth.oauth2 "otel_gateway_ddoscom_auth" {
  client_id     = sys.env("OTEL_GATEWAY_OAUTH_CLIENT_ID")
  client_secret = sys.env("OTEL_GATEWAY_OAUTH_CLIENT_SECRET")
  token_url     = sys.env("OTEL_GATEWAY_OAUTH_TOKEN_URL")
  scopes        = ["openid"]
  timeout       = "10s"
  expiry_buffer = "60s"
}


otelcol.exporter.otlphttp "otel_gateway_ddoscom_endpoint" {
  client {
    endpoint = sys.env("OTEL_GATEWAY_ENDPOINT")
    auth     = otelcol.auth.oauth2.otel_gateway_ddoscom_auth.handler
  }
}


otelcol.receiver.prometheus "otel_gateway_ddoscom_prometheus" {
  output {
    metrics = [otelcol.exporter.otlphttp.otel_gateway_ddoscom_endpoint.input]
  }
}

Start and validate

Section titled “Start and validate”

Run Alloy with the file and variables in the same process. First confirm the node_exporter scrape succeeds, then verify export activity and that Eyenode shows metrics in the expected tenant and time range.

[!NOTE] This configuration sends metrics only. Add separate components and flows before sending logs or traces.

If authentication, scraping, or delivery fails, follow gateway troubleshooting.

Additional references

Section titled “Additional references”