Question

摘要

我正在尝试找出如何在Prometheus查询中正确使用OR |运算符的原因，因为导入的Grafana仪表板无法正常工作。

长版

我试图根据从运行AppMetrics/Prometheus的Kubernetes容器中抓取的一些数据来调试Grafana仪表板；仪表板为here。基本上发生的是，当在Grafana仪表板上选择server的值“ All”（在这种情况下，server是一个单独的容器）时，没有数据出现。但是，当我选择一个单独的广告连播时，就会出现数据。

下面是从两个广告连播中提取的同一指标的示例：

# HELP application_httprequests_transactions 
# TYPE application_httprequests_transactions summary
application_httprequests_transactions_sum{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test"} 5.006965628
application_httprequests_transactions_count{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test"} 1367
application_httprequests_transactions{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test",quantile="0.5"} 0.000202825
application_httprequests_transactions{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test",quantile="0.75"} 0.000279318
application_httprequests_transactions{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test",quantile="0.95"} 0.000329862
application_httprequests_transactions{server="myapp-test-58d94bf78d-jdq78",app="MyApp",env="test",quantile="0.99"} 0.055584233

# HELP application_httprequests_transactions 
# TYPE application_httprequests_transactions summary
application_httprequests_transactions_sum{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test"} 6.10214788
application_httprequests_transactions_count{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test"} 1363
application_httprequests_transactions{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test",quantile="0.5"} 0.000218548
application_httprequests_transactions{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test",quantile="0.75"} 0.000277483
application_httprequests_transactions{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test",quantile="0.95"} 0.033821094
application_httprequests_transactions{server="myapp-test-58d94bf78d-l9tdv",app="MyApp",env="test",quantile="0.99"} 0.097113234

我在Grafana中运行了查询检查器，以找出正在调用的查询，然后在Prometheus本身中运行了PromQL查询。基本上，当我分别执行以下PromQL查询时，它们将返回数据：

rate(application_httprequests_transactions_count{env="test",app="MyApp",server="myapp-test-58d94bf78d-l9tdv"}[15m])*60

rate(application_httprequests_transactions_count{env="test",app="MyApp",server="myapp-test-58d94bf78d-jdq78"}[15m])*60

但是，当我尝试使用PromQL的|运算符来组合它们时，却无法获取数据：

rate(application_httprequests_transactions_count{env="test",app="MyApp",server="myapp-test-58d94bf78d-l9tdv|myapp-test-58d94bf78d-jdq78"}[15m])*60

这是Grafana的查询检查器的原始输出：

xhrStatus:"complete"

request:Object

method:"GET"
url:"api/datasources/proxy/56/api/v1/query_range?query=rate(application_httprequests_transactions_count%7Benv%3D%22test%22%2Capp%3D%22MyApp%22%2Cserver%3D%22myapp-test-58d94bf78d-jdq78%7Cmyapp-test-58d94bf78d-l9tdv%7Cmyapp-test-5b8c9845fb-7lklm%7Cmyapp-test-5b8c9845fb-8jf7n%7Cmyapp-test-5b8c9845fb-d9x5c%7Cmyapp-test-5b8c9845fb-fw4gj%7Cmyapp-test-5b8c9845fb-vtl9z%7Cmyapp-test-5b8c9845fb-vv7xv%7Cmyapp-test-5b8c9845fb-wq9bs%7Cmyapp-test-5b8c9845fb-xqfrt%7Cmyapp-test-69999d58b5-549vd%7Cmyapp-test-69999d58b5-lmp8x%7Cmyapp-test-69999d58b5-nbvt9%7Cmyapp-test-69999d58b5-qphj2%7Cmyapp-test-6b8dcc5ffb-gjjvj%7Cmyapp-test-6b8dcc5ffb-rxfk2%7Cmyapp-test-7fdf446767-bzhm2%7Cmyapp-test-7fdf446767-hp46w%7Cmyapp-test-7fdf446767-rhqhq%7Cmyapp-test-7fdf446767-wxmm2%22%7D%5B1m%5D)*60&start=1540574190&end=1540574505&step=15"

response:Object

status:"success"

data:Object

resultType:"matrix"

result:Array[0] => []

我也为此打开了一个GitHub问题；它有一个快速的GIF屏幕记录，显示了我的意思：AppMetrics/Prometheus#43

Answer 1

|用于正则表达式，PromQL没有|运算符（但确实有or运算符）。您需要指定匹配器是正则表达式，而不是与=~的完全匹配：

rate(application_httprequest_transactions_count{env="test",app="MyApp",server=~"myapp-test-58d94bf78d-l9tdv|myapp-test-58d94bf78d-jdq78"}[15m])*60

普罗米修斯或使用rate（）时

1 个答案: