普羅米修斯或使用rate（）時

Question

摘要

我試圖弄清楚如何正確使用OR | Prometheus查詢中的運算符，因為導入的Grafana儀表板無法正常工作。

長版

我正在嘗試根據從運行AppMetrics / Prometheus的 Kubernetes吊艙中抓取的一些數據來調試Grafana儀表板; 儀表板在這里 。 基本上發生的是，當在Grafana儀表板上選擇server “ All”值時（在這種情況下server是一個單獨的Pod），則不會顯示任何數據。 但是，當我選擇單個吊艙時，數據確實會出現。

以下是從兩個廣告連播中抓取的同一指標的示例：

# 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中運行了查詢檢查器，以查明它正在調用哪個查詢，然后在Prometheus本身中運行了PromQL查詢。 基本上，當我分別執行以下PromQL查詢時，它們將返回數據：

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，當我嘗試使用PromQL時| 運算符來合並它們，但我沒有返回數據：

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

這是Grafana的查詢檢查器的原始輸出：

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] => []

我也為此打開了一個GitHub問題。 它有一個快速的GIF屏幕記錄，顯示了我的意思： AppMetrics / Prometheus＃43

Answer 1

| 用於正則表達式，PromQL沒有| 運算符（但確實有一個or運算符）。 您需要指定匹配器是正則表達式，而不是=~的完全匹配項：

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