动态添加键值映射到结构

Question

I am trying to figure out how I can add the key value pairs of a map[string]string into my prometheus.Labels struct.

If you've got experience with prometheus: I am trying to dynamically add labels and it's values.

labelsMap := make(map[string]string)
labelsMap["nodepool"] = "default"
labelsMap["zone"] = "europe-west"

// here I'd like to add my key / value pairs from my map
containerLabels := prometheus.Labels{
    "node":      "nodename",
    "container": "foo",
    "qos":       "bar",
}
requestedContainerCPUCoresGauge.With(containerLabels).Set(containerMetric.RequestedCPUCores)

My question:

How can I dynamically add the key/value pairs from my given map labelsMap in my containerLabels?

Answer 1

You may use a simple for range loop on labelsMap, and add each pair, e.g.:

containerLabels := prometheus.Labels{}
for k, v := range labelsMap {
    containerLabels[k] = v
}

Or since prometheus.Labels is just a simple map:

type Labels map[string]string

And if you don't want to modify the labelsMap afterwards, a simple type conversion also works:

containerLabels := prometheus.Labels(labelsMap)