# Prometheus 中央服务器配置模板
# ============================================
# 说明：
#   - 本文件为配置模板，包含 ${变量名} 占位符
#   - 部署时由 deploy.sh 从 .env 读取变量，用 envsubst 生成 prometheus.yml
#   - 请勿直接编辑 prometheus.yml，修改应在此模板或 .env 中进行
#
# 变量来源：central-server/.env（参考 env.example）；本文件位于 config/prometheus/
# 涉及变量：PROMETHEUS_SCRAPE_INTERVAL, PROMETHEUS_EVALUATION_INTERVAL,
#          PROMETHEUS_CLUSTER_NAME, VICTORIAMETRICS_PORT,
#          PROMETHEUS_REMOTE_WRITE_MAX_SAMPLES, PROMETHEUS_REMOTE_WRITE_CAPACITY,
#          PROMETHEUS_REMOTE_WRITE_MAX_SHARDS
# ============================================

global:
  scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
  evaluation_interval: ${PROMETHEUS_EVALUATION_INTERVAL}s
  external_labels:
    cluster: '${PROMETHEUS_CLUSTER_NAME}'

# 远程写入：将中央 Prometheus 抓取到的本地服务指标推送到 VictoriaMetrics
# （边缘节点由 vmagent 直接 remote_write 到 VictoriaMetrics）
remote_write:
  - url: http://victoria-metrics:${VICTORIAMETRICS_PORT}/api/v1/write
    queue_config:
      max_samples_per_send: ${PROMETHEUS_REMOTE_WRITE_MAX_SAMPLES}
      capacity: ${PROMETHEUS_REMOTE_WRITE_CAPACITY}
      max_shards: ${PROMETHEUS_REMOTE_WRITE_MAX_SHARDS}

# 抓取配置：仅抓取中央本机 Docker 容器（Prometheus/VM/Alertmanager/Grafana）
scrape_configs:
  # 抓取中央Prometheus自身
  - job_name: 'prometheus-central'
    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
    static_configs:
      - targets: ['prometheus-central:9090']

  # 抓取VictoriaMetrics (VictoriaMetrics 提供 /metrics 端点)
  - job_name: 'victoria-metrics'
    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
    metrics_path: '/metrics'
    static_configs:
      - targets: ['victoria-metrics:${VICTORIAMETRICS_PORT}']

  # 抓取Alertmanager
  - job_name: 'alertmanager'
    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
    static_configs:
      - targets: ['alertmanager:9093']

  # 抓取Grafana (需要启用 metrics 功能)
  - job_name: 'grafana'
    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
    metrics_path: '/metrics'
    static_configs:
      - targets: ['grafana:3000']

# 告警规则：alert_rules.yml 与 prometheus.yml 同目录
rule_files:
  - "alert_rules.yml"

# Alertmanager：告警路由与静默
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          - alertmanager:9093