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Improve resources about Prometheus Vector Matching

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Jerome Petazzoni
2019-01-13 14:50:04 -06:00
parent d4096e9c21
commit 8c2107fba9
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slides/k8s/prometheus.md
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@@ -475,12 +475,14 @@ class: extra-details
- The Kubernetes service endpoints exporter uses tag `pod` instead
- And this is why we can't have nice things
- See [this blog post](https://www.robustperception.io/exposing-the-software-version-to-prometheus) or [this other one](https://www.weave.works/blog/aggregating-pod-resource-cpu-memory-usage-arbitrary-labels-prometheus/) to see how to perform "joins"
- See [Prometheus issue #2204](https://github.com/prometheus/prometheus/issues/2204) for the rationale
- Alas, Prometheus cannot "join" time series with different labels
([this comment](https://github.com/prometheus/prometheus/issues/2204#issuecomment-261515520) in particular if you want a workaround involving relabeling)
(see [Prometheus issue #2204](https://github.com/prometheus/prometheus/issues/2204) for the rationale)
- Then see [this blog post](https://www.robustperception.io/exposing-the-software-version-to-prometheus) or [this other one](https://www.weave.works/blog/aggregating-pod-resource-cpu-memory-usage-arbitrary-labels-prometheus/) to see how to perform "joins"
- There is a workaround involving relabeling, but it's "not cheap"
- There is a good chance that the situation will improve in the future
- see [this comment](https://github.com/prometheus/prometheus/issues/2204#issuecomment-261515520) for an overview
- or [this blog post](https://5pi.de/2017/11/09/use-prometheus-vector-matching-to-get-kubernetes-utilization-across-any-pod-label/) for a complete description of the process