github.com/google/cadvisor@v0.49.1/collector/config/sample_config.json (about)

     1  {
     2  	"endpoint" : "http://localhost:8000/nginx_status",
     3  	"metrics_config"  : [
     4  		{ "name" : "activeConnections",  
     5  		  "metric_type" : "gauge",
     6  		  "units" : "number of active connections",
     7  		  "data_type" : "int",
     8  		  "polling_frequency" : 10,
     9  		  "regex" : "Active connections: ([0-9]+)"			
    10  		},
    11  		{ "name" : "reading",
    12  		  "metric_type" : "gauge", 
    13  		  "units" : "number of reading connections",
    14  		  "data_type" : "int",
    15  		  "polling_frequency" : 10,
    16  		  "regex" : "Reading: ([0-9]+) .*"	
    17  		},
    18  		{ "name" : "writing",
    19                    "metric_type" : "gauge",
    20                    "data_type" : "int",
    21  		  "units" : "number of writing connections",
    22                    "polling_frequency" : 10,
    23                    "regex" : ".*Writing: ([0-9]+).*"
    24                  },
    25  		{ "name" : "waiting",
    26                    "metric_type" : "gauge",
    27                    "units" : "number of waiting connections",
    28  		  "data_type" : "int",
    29                    "polling_frequency" : 10,
    30                    "regex" : ".*Waiting: ([0-9]+)"
    31                  }
    32  	] 	
    33  	
    34  }