标尺中的动态普罗米修斯标签

Question

I wonder if/how it's possible to add dynamic labels. I don't know the key or the quantity of the labels which I would like to add to my gauge values.

What I tried

labelsContainers = []string{"node", "container", "pod", "qos", "namespace", "nodepool"}

// Requested resources
requestedContainerCPUCoresGauge = prometheus.NewGaugeVec(
    prometheus.GaugeOpts{
        Namespace: namespace,
        Subsystem: "pod_container_resource_requests",
        Name:      "cpu_cores",
        Help:      "Requested CPU cores in Kubernetes configuration",
    },
    labelsContainers)

for _, containerMetric := range containerMetrics {
    containerLabels := prometheus.Labels{
        "node":      containerMetric.Node,
        "container": containerMetric.Container,
        "qos":       containerMetric.Qos,
        "pod":       containerMetric.Pod,
        "namespace": containerMetric.Namespace,
    }

    for key, value := range containerMetric.NodeLabels {
        containerLabels[key] = value
    }

    requestedContainerCPUCoresGauge.With(containerLabels).Set(containerMetric.RequestedCPUCores)
    requestedContainerRAMBytesGauge.With(containerLabels).Set(containerMetric.RequestedMemoryBytes)
}

The problem

This throws a panic. I assume this is because the prom client expects exactly those labels defined in labelsContainers and doesn't allow further labels. How can I create a gauge which allows additional (unknown) labels?