问题描述
我目前有以下Promql查询，可让我查询每个K8S Pod使用的内存:
I currently have the following Promql query which allow me to query the memory used by each of my K8S pods:
sum(container_memory_working_set_bytes{image!="",name=~"^k8s_.*"}) by (pod_name)
广告连播的名称后面是由K8S定义的哈希:
The pod's name is followed by a hash defined by K8S:
weave-net-kxpxc
weave-net-jjkki
weave-net-asdkk
哪个都属于同一个应用程序:weave-net
Which all belongs to the same app: weave-net
我想汇总属于同一应用程序的所有Pod的内存.
What I would like is to aggregate the memory of all pods which belongs to the same app.
因此，查询将求和所有weave-net个pod的内存，并将结果放入名为weave的应用程序中.这样的结果将是:
So, the query would sum the memory of all weave-net pods and place the result in an app called weave. Such as the result would be:
{pod_name="weave-net"} 10
代替
{pod_name="weave-net-kxpxc"} 5
{pod_name="weave-net-jjkki"} 3
{pod_name="weave-net-asdkk"} 2
是否有可能这样做，如果可以，怎么办?
Is it even possible to do so, and if yes, how ?
推荐答案
您可以使用 label_replace
sum(label_replace(container_memory_working_set_bytes{image!="",name=~"^k8s_.*"}, "pod_set", "$1", "pod_name", "(.*)-.{5}")) by (pod_set)
您将包括一个与第一个组($ 1)匹配的新标签(pod_set)，该新标签与pod_name标签上的正则表达式匹配.然后，对新标签pod_set求和.
You will be including a new label (pod_set) that matches the first group ($1) from matching the regex over the pod_name label. Then you sum over the new label pod_set.
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