Grafana Agent / Alloy

Monitor Grafana Agent or Alloy itself — component health, WAL status, remote write queue lag, and scrape errors — using the built-in self-metrics endpoint.

Pattern: Agent /metrics → Prometheus scrape → xScaler remote_write

Prerequisites

Grafana Agent 0.33+ or Grafana Alloy 1.x
xScaler tenant credentials (token + tenant ID)

Option A — Prometheus

Grafana Agent exposes self-metrics at :12345/metrics by default. Alloy uses the same port.

scrape_configs:
  - job_name: grafana_agent
    static_configs:
      - targets: ['localhost:12345']

remote_write:
  - url: https://euw1-01.m.xscalerlabs.com/api/v1/push
    authorization:
      credentials: <token>
    headers:
      X-Scope-OrgID: <tenant-id>

Option B — Self-scrape in Alloy

Alloy can scrape itself natively:

prometheus.scrape "agent_self" {
  targets    = [{"__address__" = "localhost:12345"}]
  forward_to = [prometheus.remote_write.xscaler.receiver]
  job_name   = "alloy_self"
}

prometheus.remote_write "xscaler" {
  endpoint {
    url = "https://euw1-01.m.xscalerlabs.com/api/v1/push"
    authorization {
      type        = "Bearer"
      credentials = "<token>"
    }
    headers = { "X-Scope-OrgID" = "<tenant-id>" }
  }
}

Option C — OpenTelemetry Collector

receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: grafana_agent
          static_configs:
            - targets: ['localhost:12345']

processors:
  batch:
    timeout: 10s

exporters:
  otlphttp/xscaler:
    endpoint: https://euw1-01.m.xscalerlabs.com
    headers:
      Authorization: "Bearer <token>"
      X-Scope-OrgID: "<tenant-id>"
    compression: gzip

service:
  pipelines:
    metrics:
      receivers:  [prometheus]
      processors: [batch]
      exporters:  [otlphttp/xscaler]

Logs

Collect Grafana Agent service log via systemd journal. Add the following to your Alloy config:

loki.source.journal "grafana_agent_journal" {
  forward_to    = [loki.write.xscaler.receiver]
  relabel_rules = loki.relabel.grafana_agent_journal.rules
  labels = {
    job      = "integrations/grafana_agent",
    instance = constants.hostname,
  }
}

loki.relabel "grafana_agent_journal" {
  forward_to = []
  rule {
    source_labels = ["__journal__systemd_unit"]
    target_label  = "unit"
  }
}

loki.write "xscaler" {
  endpoint {
    url = "https://euw1-01.l.xscalerlabs.com/api/v1/logs/push"

    http_client_config {
      authorization {
        type        = "Bearer"
        credentials = env("XSCALER_TOKEN")
      }
    }

    headers = { "X-Scope-OrgID" = env("XSCALER_TENANT_ID") }
  }
}

Key metrics

Metric	Description
`agent_component_controller_running_components`	Running Alloy components
`prometheus_remote_storage_samples_failed_total`	Failed samples to remote write
`prometheus_remote_write_queue_highest_sent_timestamp_seconds`	WAL lag indicator
`agent_wal_samples_appended_total`	Samples written to WAL
`prometheus_target_scrape_pool_targets`	Active scrape targets
`prometheus_sd_discovered_targets`	Discovered targets by SD

Prerequisites​

Option A — Prometheus​

Option B — Self-scrape in Alloy​

Option C — OpenTelemetry Collector​

Logs​

Key metrics​