Prometheus监视Kubernetes容器内存使用情况并报告容器使用率是否超过90％ [英] Prometheus monitoring Kubernetes Container Memory usage and report if container using more than 90%

问题描述

例如，如何通过Prometheus监视容器内存使用情况.

Looking for example how to monitor Container Memory Usage with Prometheus.

如果使用此查询，它将报告所有容器正常:

It reports all the containers ok if we using this query:

(container_memory_usage_bytes / container_spec_memory_limit_bytes) * 100 > 90

但是，如果容器没有定义内存限制，则可以正常工作.除数为0，结果为+ Inf，这意味着由于+ Inf匹配>90.

However works ok if container does not have a memory limit defined. The the divisor is 0, and the results are +Inf, meaning that the alert triggers incorrectly since +Inf matches > 90.

关于如何正确使用容器内存使用情况监视的任何建议?

Any suggestions how to properly use Container Memory Usage monitoring?

推荐答案

几天前，我从不同的角度提出了相同的问题

I asked the same question from a different perspective just a few days earlier here. So far I have not found an answer. I have settled with adding another label has_memory_limit that I use to only alert on containers that have a limit defined.

好的，我知道了:

((container_memory_usage_bytes / container_spec_memory_limit_bytes) != +Inf)  * 100 > 52

由于正无穷大，负无穷大和NaN是 Prometheus ，您只需使用！= + Inf 即可将其过滤掉.

Since positive infinity, negative infinity and NaN are numbers in Prometheus, you can simply filter them out with != +Inf.

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