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docs/scrape_config_examples.md: add an example for scraping cadvisor in Kubernetes
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@ -303,6 +303,46 @@ See [`kubernetes_sd_configs` docs](https://docs.victoriametrics.com/sd_configs.h
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See [relabeling docs](https://docs.victoriametrics.com/vmagent.html#relabeling) for details on `relabel_configs`.
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### Discovering and scraping metrics from `cadvisor`
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[cadvisor](https://github.com/google/cadvisor) exposes resource usage metrics for every container in Kubernetes.
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The following [`-promscrape.config`](https://docs.victoriametrics.com/#how-to-scrape-prometheus-exporters-such-as-node-exporter)
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can be used for collecting `cadvisor` metrics in Kubernetes:
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```yaml
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scrape_configs:
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- job_name: cadvisor
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kubernetes_sd_configs:
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# Cadvisor is installed on every Kubernetes node, so use `role: node` service discovery
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#
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- role: node
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# This is needed for scraping cadvisor metrics from Kubernetes API server proxy.
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# See relabel_configs below.
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#
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bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
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tls_config:
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ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
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relabel_configs:
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# Cadvisor metrics are better to scrape from Kubernetes API server proxy.
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# There is no need to add container, pod and node labels to the scraped metrics,
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# since cadvisor adds these labels on itself.
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#
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- source_labels: [__meta_kubernetes_node_name]
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target_label: __address__
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regex: '(.+)'
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replacement: https://kubernetes.default.svc/api/v1/nodes/$1/proxy/metrics/cadvisor
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- source_labels: [__meta_kubernetes_node_name]
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target_label: instance
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```
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See [`kubernetes_sd_configs` docs](https://docs.victoriametrics.com/sd_configs.html#kubernetes_sd_configs) for more details.
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See [relabeling docs](https://docs.victoriametrics.com/vmagent.html#relabeling) for details on `relabel_configs`.
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See [these docs](https://docs.victoriametrics.com/sd_configs/#http-api-client-options) for details on `bearer_token_file` and `tls_config` options.
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### Discovering and scraping metrics for a particular container in Kubernetes
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The following [`-promscrape.config`](https://docs.victoriametrics.com/#how-to-scrape-prometheus-exporters-such-as-node-exporter)
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