如何为ping丢失率设置prometheus，grafana和blackbox_exporter

我正在尝试使用prometheus，grafana和blackbox_exporter通过ping（icmp）监视我的服务器 . 最近我们面临网络不稳定，但我的设置无法显示警报 . 我想知道我应该使用'probe_duration_seconds'还是其他探测方法？

grfana设置度量标准：probe_duration_seconds和面板数据源是prometheus

blackbox.yml：

modules:
  icmp:                                                                                                                                                                                       
    prober: icmp                                                                                                                                                                              
    timeout: 5s                                                                                                                                                                               
    icmp:                                                                                                                                                                                     
      protocol: "icmp"                                                                                                                                                                        
      preferred_ip_protocol: "ip4"

prometheus.yml：

global:                                                                                                                                                                                       
  scrape_interval:     15s                                                                                                                                                                                                  
  external_labels:                                                                                                                                                                            
    monitor: 'codelab-monitor'                                                                                                                                                                
scrape_configs:                                                                                                                                                                               
  - job_name: 'blackbox'                                                                                                                                                                      
    scrape_interval: 5s                                                                                                                                                                       
    metrics_path: /probe                                                                                                                                                                      
    params:                                                                                                                                                                                   
      module: [icmp] #ping                                                                                                                                                                    
    static_configs:                                                                                                                                                                           
      - targets: ['192.168.1.29']                                                                                                                                                            
        labels:                                                                                                                                                                               
          group: 'env A'                                                                                                                                                                   
      - targets: ['192.168.2.185', '192.168.3.185', '192.168.4.185']                                           
        labels:                                                                                                                                                                               
          group: 'env B' 
    relabel_configs:                                                                                                                                                                          
      - source_labels: [__address__]                                                                                                                                                          
        regex: (.*)(:80)?                                                                                                                                                                     
        target_label: __param_target                                                                                                                                                          
        replacement: ${1}                                                                                                                                                                     
      - source_labels: [__param_target]                                                                                                                                                       
        regex: (.*)                                                                                                                                                                           
        target_label: instance                                                                                                                                                                
        replacement: ${1}                                                                                                                                                                     
      - source_labels: []                                                                                                                                                                     
        regex: .*                                                                                                                                                                             
        target_label: __address__                                                                                                                                                             
        replacement: 127.0.0.1:9115