HAProxy

Monitor HAProxy frontend/backend request rates, error rates, queue depths, and server health.

Key Metrics

Metric	Description
haproxy_frontend_http_requests_total	HTTP requests per frontend
haproxy_backend_http_responses_total	HTTP responses per backend
haproxy_backend_current_queue	Current request queue depth
haproxy_frontend_bytes_in_total	Bytes received
haproxy_server_status	Backend server health (1=UP)
haproxy_backend_connection_errors_total	Connection errors

Prerequisites

• HAProxy 2.0+ with the stats endpoint or Prometheus exporter enabled
• Network access to the stats port

Configuration

Enable the Prometheus exporter in haproxy.cfg

frontend stats
    bind *:9101
    http-request use-service prometheus-exporter if { path /metrics }
    stats enable
    stats uri /stats

Option A — Prometheus scrape

scrape_configs:
  - job_name: haproxy
    static_configs:
      - targets: ['localhost:9101']

remote_write:
  - url: https://<region>.xscalerlabs.com/api/v1/push
    headers:
      X-Scope-OrgID: <tenant-id>
    basic_auth:
      password: <api-token>

Option B — Grafana Alloy

prometheus.scrape "haproxy" {
  targets = [{"__address__" = "localhost:9101"}]
  forward_to = [prometheus.remote_write.xscaler.receiver]
}

prometheus.remote_write "xscaler" {
  endpoint {
    url = "https://<region>.xscalerlabs.com/api/v1/push"
    headers = { "X-Scope-OrgID" = "<tenant-id>" }
    basic_auth { password = "<api-token>" }
  }
}

Option C — OpenTelemetry Collector

receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: haproxy
          static_configs:
            - targets: ['localhost:9101']

exporters:
  prometheusremotewrite:
    endpoint: https://<region>.xscalerlabs.com/api/v1/push
    headers:
      Authorization: Bearer <api-token>
      X-Scope-OrgID: <tenant-id>

service:
  pipelines:
    metrics:
      receivers: [prometheus]
      exporters: [prometheusremotewrite]

Logs

Collect HAProxy traffic and error log. Add the following to your Alloy config:

local.file_match "haproxy_logs" {
  path_targets = [{
    __address__ = "localhost",
    __path__    = "/var/log/haproxy.log",
    instance    = constants.hostname,
    job         = "integrations/haproxy",
  }]
}

loki.source.file "haproxy_logs" {
  targets    = local.file_match.haproxy_logs.targets
  forward_to = [loki.write.xscaler.receiver]
}

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") }
  }
}