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docs/scrape_config_examples.md: add an example for scraping cadvisor in Kubernetes

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Aliaksandr Valialkin 2024-02-07 03:22:11 +02:00
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@ -303,6 +303,46 @@ See [`kubernetes_sd_configs` docs](https://docs.victoriametrics.com/sd_configs.h
See [relabeling docs](https://docs.victoriametrics.com/vmagent.html#relabeling) for details on `relabel_configs`.
### Discovering and scraping metrics from `cadvisor`
[cadvisor](https://github.com/google/cadvisor) exposes resource usage metrics for every container in Kubernetes.
The following [`-promscrape.config`](https://docs.victoriametrics.com/#how-to-scrape-prometheus-exporters-such-as-node-exporter)
can be used for collecting `cadvisor` metrics in Kubernetes:
```yaml
scrape_configs:
- job_name: cadvisor
kubernetes_sd_configs:
# Cadvisor is installed on every Kubernetes node, so use `role: node` service discovery
#
- role: node
# This is needed for scraping cadvisor metrics from Kubernetes API server proxy.
# See relabel_configs below.
#
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
tls_config:
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
relabel_configs:
# Cadvisor metrics are better to scrape from Kubernetes API server proxy.
# There is no need to add container, pod and node labels to the scraped metrics,
# since cadvisor adds these labels on itself.
#
- source_labels: [__meta_kubernetes_node_name]
target_label: __address__
regex: '(.+)'
replacement: https://kubernetes.default.svc/api/v1/nodes/$1/proxy/metrics/cadvisor
- source_labels: [__meta_kubernetes_node_name]
target_label: instance
```
See [`kubernetes_sd_configs` docs](https://docs.victoriametrics.com/sd_configs.html#kubernetes_sd_configs) for more details.
See [relabeling docs](https://docs.victoriametrics.com/vmagent.html#relabeling) for details on `relabel_configs`.
See [these docs](https://docs.victoriametrics.com/sd_configs/#http-api-client-options) for details on `bearer_token_file` and `tls_config` options.
### Discovering and scraping metrics for a particular container in Kubernetes
The following [`-promscrape.config`](https://docs.victoriametrics.com/#how-to-scrape-prometheus-exporters-such-as-node-exporter)