[TOC] ## 示例 啟動三個node ``` tar -xzvf node_exporter-*.*.tar.gz cd node_exporter-*.* ./node_exporter --web.listen-address 127.0.0.1:8080 ./node_exporter --web.listen-address 127.0.0.1:8081 ./node_exporter --web.listen-address 127.0.0.1:8082 ``` 假設三個 node 中,兩個2生成環境`production`,一個測試環境`canary` ``` scrape_configs: - job_name: 'node' # 覆蓋全局默認的參數，并將采樣時間間隔設置為 5s scrape_interval: 5s static_configs: - targets: ['localhost:8080', 'localhost:8081'] labels: group: 'production' - targets: ['localhost:8082'] labels: group: 'canary' ``` **配置規則將采集的數據匯總到新的時間序列中 ** 但在臨時計算時，匯總了數千個時間序列的查詢可能會變慢。為了提高效率，Prometheus 允許通過配置的記錄規則將表達式預記錄到全新的持久時間序列中 創建 `prometheus.rules.yml:` ``` groups: - name: cpu-node rules: - record: job_instance_mode:node_cpu_seconds:avg_rate5m expr: avg by (job, instance, mode) (rate(node_cpu_seconds_total[5m])) ``` 完整示例 ``` global: scrape_interval: 15s # 默認情況下，每 15s 采集一次目標數據 evaluation_interval: 15s # 每 15s 進行一次規則評估 # 與外部系統通信時，可以將這些標簽應用到到和時間序列或告警上 external_labels: monitor: 'codelab-monitor' rule_files: - 'prometheus.rules.yml' scrape_configs: - job_name: 'prometheus' # Override the global default and scrape targets from this job every 5 seconds. scrape_interval: 5s static_configs: - targets: ['localhost:9090'] - job_name: 'node' # 覆蓋全局默認的參數，并將采樣時間間隔設置為 5s scrape_interval: 5s static_configs: - targets: ['localhost:8080', 'localhost:8081'] labels: group: 'production' - targets: ['localhost:8082'] labels: group: 'canary' ```