WARNING core/push.go:35...err:tag key and value should not be empty

[1029649360]

环境：
夜莺版本3.3.1

问题描述：
没有收集到mysql_slave_status相关指标

夜莺插件采集配置：
{
"exporter_urls": ["http://127.0.0.1:9104/metrics"],
"append_tags": [
"region=zyybj",
"dept=ops",
"exporter_port=9104",
"mysql_port=3306"
],
"endpoint": "",
"ignore_metrics_prefix": ["go_"],
"metric_prefix": "",
"metric_type": {
"mysql_global_status_connections":"SUBTRACT"
},
"default_mapping_metric_type": "SUBTRACT",
"timeout": 1000
}

agent报错信息：
2020-12-21 13:34:09.773894 WARNING core/push.go:35 metric:&{ mysql_slave_status_exec_master_log_pos 192.168.18.32 1608528849 60 3.9652926e+07 0 GAUGE channel_name=,connection_name=,dept=ops,exporter_port=9104,master_host=192.168.18.31,master_uuid=ea29fa07-bcd6-11ea-b794-005056aed2e9,mysql_port=3306,region=zyybj map[channel_name: dept:ops exporter_port:9104 master_host:192.168.18.31 master_uuid:ea29fa07-bcd6-11ea-b794-005056aed2e9 mysql_port:3306 region:zyybj] } err:tag key and value should not be empty

[UlricQin]

这个有点麻烦了，夜莺不支持tagvalue为空，上面出现的tag：channel_name、connection_name，都是空，这个就会报错。要么改造mysqld_exporter的代码，要么改造prometheus-exporter-collector的代码

[1029649360]

我先尝试自己编写个收集slave metrics的脚本吧。

[ttt777t7]

1、通过prometheus-exporter-collector收集的数据如下
[{
"metric": "redis_commands_processed_total",
"endpoint": "127.0.0.1",
"timestamp": 1631013680,
"step": 0,
"value": 1970,
"counterType": "COUNTER",
"tags": "aaa=hellw,dept=cloud",
"tagsMap": {},
"extra": ""
},
{
"metric": "redis_memory_used_peak_bytes",
"endpoint": "127.0.0.1",
"timestamp": 1631013680,
"step": 0,
"value": 813360,
"counterType": "GAUGE",
"tags": "aaa=hellw,dept=cloud",
"tagsMap": {},
"extra": ""
}
]
2、server端的日志却提示tags是map格式，这个是已知问题吗？
json: cannot unmarshal string into Go struct field MetricValue.tags of type map[string]string

[UlricQin]

你用的v5吧，v5的格式变了，tags要写成map。不过既然是v5，也就不用这个插件了，直接prometheus那配置抓取mysqld_exporter的数据即可