## 基于文件的服务发现 ## 一、概述 定义一组资源”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，此种方式可以被prometheus动态获取到，而不需要重启。 基于文件的服务发现仅仅略优于静志配置的服务发现方式，它不依赖于任何平台或第三方服务，因而也是最为简单和通用的实现方式。 prometheus server 定期从文件中加载target 信息(prometheus-server pull指标发现机制-job_name 获取要 pu 的对象target)文件它含有定义的target 列表，以及可选的标签信息 ### 1.1 原理 它读取一组包含零个或多个<static_config>列表的文件，对所有定义的文件的变更通过磁盘监视被检测到并立即应用，文件可以以YAML或JSON 格式提供。文件必须包含一个静态配置的列表 文件内容也会在指定的刷新间隔时间内定期重新读取。(在去读取files的时候，可以去配置Refresh interval，如果没有配置，这里有个默认值是5m钟的，另外一个就是在配置文件自动发现的时候，支持通配符这样一个模式。) ### 1.2 实验描述 * 定义一个服务发现的目标文件targets.yml <br><hr><br> ## 二、定义一个服务发现的目标文件targets.yml ### 2.1 创建targets.yaml文件 接下来我们来创建一个用于服务发现的目标文件，在与 prometheus.ym文件目录下面创建个名为 targets/targets.yml的文件，内容 cd /data/docker-prometheus/prometheus mkdir targets -p vi targets/tragets.yml 把简单的不需要额外参数的都放进去这个配置文件，如下图所示  - targets: ['localhost:9090'] labels: job: prometheus server instance：prometheus Server - targets: ['cadvisor:8080'] labels: job: cadvisor instance: Prometheus服务器所在docker - targets: ['192.168.100.141:8079'] labels: job: cadvisor instance: Centos2服务器的所在docker - targets: ['node-exporter:9100'] labels: job: node-exporter instance: Centos1服务器监控Linux - targets: ['192.168.100.141:9100'] labels: job: node-exporter instance: Centos2服务器监控Linux - targets: ['192.168.100.141:9121'] labels: job: redis-exporter instance: Centos2服务器监控redis - targets: ['192.168.100.141:9216'] labels: job: mongodb-exporter instance: Centos2服务器监控mongodb - targets: ['192.168.100.141:9104'] labels: job: mysqld-exporter instance: Centos2服务器监控mysql - targets: ['192.168.100.141:9113'] labels: job: nginx-exporter instance: Centos2服务器监控nginx - targets: ['192.168.100.141:9419'] labels: job: rabbitmq-exporter instance: Centos2服务器监控rabbitmq - targets: ['192.168.100.141:9256'] labels: job: process-exporter instance: Centos2服务器监控进程 - targets: ['192.168.100.58:8182'] labels: job: golang-exporter instance: Centos3服务器监控go自定义程序 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;保存后输入命令更新： curl -XPOST http://localhost:9090/-/reload &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;成功监听  其他监控配置 #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'] # 这里使用 __param_target 作为源标签 target_label: instance # 设置目标标签为 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;保存后输入命令更新： curl -XPOST http://localhost:9090/-/reload &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;成功监听