## 基于文件的服務發現 ## 一、概述 定義一組資源”子“配置文件(json格式或者yaml格式)，里面只存放需要采集的targets信息，此種方式可以被prometheus動態獲取到，而不需要重啟。 基于文件的服務發現僅僅略優于靜志配置的服務發現方式，它不依賴于任何平臺或第三方服務，因而也是最為簡單和通用的實現方式。 prometheus server 定期從文件中加載target 信息(prometheus-server pull指標發現機制-job_name 獲取要 pu 的對象target)文件它含有定義的target 列表，以及可選的標簽信息 ### 1.1 原理 它讀取一組包含零個或多個<static_config>列表的文件，對所有定義的文件的變更通過磁盤監視被檢測到并立即應用，文件可以以YAML或JSON 格式提供。文件必須包含一個靜態配置的列表 文件內容也會在指定的刷新間隔時間內定期重新讀取。(在去讀取files的時候，可以去配置Refresh interval，如果沒有配置，這里有個默認值是5m鐘的，另外一個就是在配置文件自動發現的時候，支持通配符這樣一個模式。) ### 1.2 實驗描述 * 定義一個服務發現的目標文件targets.yml <br><hr><br> ## 二、定義一個服務發現的目標文件targets.yml ### 2.1 創建targets.yaml文件 接下來我們來創建一個用于服務發現的目標文件，在與 prometheus.ym文件目錄下面創建個名為 targets/targets.yml的文件，內容 cd /data/docker-prometheus/prometheus mkdir targets -p vi targets/tragets.yml 把簡單的不需要額外參數的都放進去這個配置文件，如下圖所示  - targets: ['localhost:9090'] labels: job: prometheus server instance：prometheus Server - targets: ['cadvisor:8080'] labels: job: cadvisor instance: Prometheus服務器所在docker - targets: ['192.168.100.141:8079'] labels: job: cadvisor instance: Centos2服務器的所在docker - targets: ['node-exporter:9100'] labels: job: node-exporter instance: Centos1服務器監控Linux - targets: ['192.168.100.141:9100'] labels: job: node-exporter instance: Centos2服務器監控Linux - targets: ['192.168.100.141:9121'] labels: job: redis-exporter instance: Centos2服務器監控redis - targets: ['192.168.100.141:9216'] labels: job: mongodb-exporter instance: Centos2服務器監控mongodb - targets: ['192.168.100.141:9104'] labels: job: mysqld-exporter instance: Centos2服務器監控mysql - targets: ['192.168.100.141:9113'] labels: job: nginx-exporter instance: Centos2服務器監控nginx - targets: ['192.168.100.141:9419'] labels: job: rabbitmq-exporter instance: Centos2服務器監控rabbitmq - targets: ['192.168.100.141:9256'] labels: job: process-exporter instance: Centos2服務器監控進程 - targets: ['192.168.100.58:8182'] labels: job: golang-exporter instance: Centos3服務器監控go自定義程序 再修改prometheus配置 vim prometheus/prometheus.yml  - job_name: "file-sd-test" file_sd_configs: - refresh_interval: 10s files: - "targets/targets.yml" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;保存后輸入命令更新： curl -XPOST http://localhost:9090/-/reload &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;成功監聽  其他監控配置 #domain vim prometheus/targets/domain.yml - targets: - 'qq.com' - 'baidu.com' #snmp vim prometheus/targets/snmp.yml - targets: - 192.168.100.141 #blockerbox_http vim prometheus/targets/blockerbox_http.yml - targets: - https://www.baidu.com - https://wy.ldw520.top #blockerbox_tcp vim prometheus/targets/blockerbox_tcp.yml - targets: - 192.168.28.87:9090 - 192.168.100.141:9100 #blockerbox_icmp vim prometheus/targets/blockerbox_icmp.yml - targets: - 192.168.100.87 - 192.168.100.141 再修改prometheus配置 vim prometheus/prometheus.yml  - job_name: "domain-exporter" metrics_path: /probe relabel_configs: - source_labels: ['__address__'] target_label: __param_target - source_labels: ['__param_target'] # 這里使用 __param_target 作為源標簽 target_label: instance # 設置目標標簽為 instance - target_label: __address__ replacement: 192.168.100.141:9222 # 指向 Blackbox Exporter 的地址 file_sd_configs: - refresh_interval: 10s files: - "targets/domain.yml" - job_name: "snmp-exporter" scrape_interval: 30s scrape_timeout: 30s file_sd_configs: - refresh_interval: 10s files: - "targets/snmp.yml" metrics_path: /snmp params: module: [if_mib] relabel_configs: - source_labels: [__address__] target_label: __param_target - source_labels: [__param_target] target_label: instance - target_label: __address__ replacement: 192.168.100.141:9116 - job_name: "blackbox_http" metrics_path: /probe params: module: [http_2xx] file_sd_configs: - refresh_interval: 10s files: - "targets/blackbox_http.yml" relabel_configs: - source_labels: [__address__] target_label: __param_target - source_labels: [__param_target] target_label: instance - target_label: __address__ replacement: blackbox_exporter:9115 - job_name: "blackbox_tcp" metrics_path: /probe params: module: [tcp_connect] file_sd_configs: - refresh_interval: 10s files: - "targets/blackbox_tcp.yml" relabel_configs: - source_labels: [__address__] target_label: __param_target - source_labels: [__param_target] target_label: instance - target_label: __address__ replacement: blackbox_exporter:9115 - job_name: "blackbox_icmp" metrics_path: /probe params: module: [icmp] file_sd_configs: - refresh_interval: 10s files: - "targets/blackbox_icmp.yml" relabel_configs: - source_labels: [__address__] target_label: __param_target - source_labels: [__param_target] target_label: instance - target_label: __address__ replacement: blackbox_exporter:9115 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;保存后輸入命令更新： curl -XPOST http://localhost:9090/-/reload &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;成功監聽