有没有办法在忽略（没有）标签的情况下获取 Prometheus 中指标的最新值？

Question

PROMQL 查询 我试过的是 - last_over_time(METRIC_ABC{ INDICATORNAME="INDICATORNAME_1"}[6h])

Returns 指标 -

METRIC_ABC{DATE="2022-04-27", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_1", instance="i_1", job="DB"} 10
METRIC_ABC{DATE="2022-04-27", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_2", instance="i_1", job="DB"} 15
METRIC_ABC{DATE="2022-04-28", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_1", instance="i_1", job="DB"} 11
METRIC_ABC{DATE="2022-04-28", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_2", instance="i_1", job="DB"} 16

我只想获取最新的而忽略 DATE 标签。即

METRIC_ABC{DATE="2022-04-28", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_1", instance="i_1", job="DB"} 11
METRIC_ABC{DATE="2022-04-28", INDICATORNAME="INDICATORNAME_1", PRODUCT_NAME="PR_2", instance="i_1", job="DB"} 16

是否有任何方法可以忽略具有 last_over_time 功能的标签或其他方法？我确定这是一个常见的用例，那么是否已经存在我找不到的函数？

Answer 1

之前需要使用像sum这样的聚合函数：

last_over_time(sum without (DATE) (METRIC_ABC{ INDICATORNAME="INDICATORNAME_1"}[6h]))

有没有办法在忽略（没有）标签的情况下获取 Prometheus 中指标的最新值？

Is there a way to get latest value of a metric in Prometheus while ignoring(without) a label?

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