<p>I have a kubernetes cluster running on digital ocean that I want to monitor. When querying the exposed cAdvisor metrics on <code>&lt;apiserver&gt;/api/v1/nodes/&lt;nodename&gt;/proxy/metrics/cadvisor</code> I get the following results for the container_cpu_load_average_10s</p>

<pre><code># HELP container_cpu_load_average_10s Value of container cpu load average over the last 10 seconds.
# TYPE container_cpu_load_average_10s gauge
container_cpu_load_average_10s{container="",id="/",image="",name="",namespace="",pod=""} 0 1579564900287
container_cpu_load_average_10s{container="",id="/docker/0da952be93af76ef4f89c82d39ffc994814386013b0313db0e376ba8c1ca52ec",image="gcr.io/google-containers/hyperkube:v1.16.2",name="kubelet",namespace="",pod=""} 0 1579564899268
container_cpu_load_average_10s{container="",id="/kubepods",image="",name="",namespace="",pod=""} 0 1579564900316
container_cpu_load_average_10s{container="",id="/kubepods/besteffort",image="",name="",namespace="",pod=""} 0 1579564903221
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/pod05e648ab-0d69-46e7-97f5-53fa5547e631",image="",name="",namespace="default",pod="sh2-74cdb7f89b-7wmn2"} 0 1579564889468
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/pod1d3d6f5c-8b8f-47df-87e1-e6796b6c8cac",image="",name="",namespace="kube-system",pod="kubelet-rubber-stamp-7f966c6779-9pj2x"} 0 1579564897907
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/pod35f81ba8-c778-4771-8103-ca6a1f1df3b3",image="",name="",namespace="kube-system",pod="cilium-operator-d5cd7d758-jlc7g"} 0 1579564902427
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/pod7c42ac9d-14e2-4773-9f6b-78745e065d98",image="",name="",namespace="default",pod="sh-68d446d656-pr6lw"} 0 1579564893074
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/pod87c517f4-be8d-4eeb-b550-7edd7b6629c7",image="",name="",namespace="ingress",pod="haproxy-ingress-c5fc9f5d-zbmc7"} 0 1579564903152
container_cpu_load_average_10s{container="",id="/kubepods/besteffort/poda137a036-0931-4d38-a39e-24269eda4558",image="",name="",namespace="kube-system",pod="metrics-server-7cdf9b7694-9ngsb"} 0 1579564906312
</code></pre>

<p>The metrics value is actually two values, the first is always 0 and then something in the area of 1579564906312. </p>

<p>I'm new to prometheus and I thought a metric can only have one value, but apparently cadvisor exposes two values. Is this a bug or something I don't know yet about prometheus? If it's not a bug how should I treat it, because the prometheus browser only shows the first value which is 0.
<a href="https://i.stack.imgur.com/H4Nl4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/H4Nl4.png" alt="enter image description here"></a></p>

<p>Each metric has dimensions to it. So, it seems like the same metric, but it's only the name. What distinguishes these metrics from eachother is their labels.</p>

<p>If you look closely at your screenshot, you'll find these are CPU Loads of different pods of different services.</p>

<p>EDIT: 
The format that Prometheus exposes its metric is </p>

<pre><code>metric_name [
  "{" label_name "=" `"` label_value `"` { "," label_name "=" `"` label_value `"` } [ "," ] "}"
] value [ timestamp ]
</code></pre>

<p>This hints the last number is a timestamp.</p>

<p>Read more in <a href="https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md" rel="nofollow noreferrer">https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md</a></p>
