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@reachlin
Created April 19, 2017 07:06
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sample prometheus configuration explained
// For all the confusing Prometheus configuration and
// regular expressions,
// explained in examples.
// Remember, there are default values for each item if it's missing.
// regex is (.*),
// replacement is $1,
// separator is ;
// ,and action is replace
relabel_configs:
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
action: keep
regex: true
// keep targets with label __meta_kubernetes_service_annotation_prometheus_io_scrape equals 'true',
// which means the user added prometheus.io/scrape: true in the service's annotation.
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
action: replace
target_label: __scheme__
regex: (https?)
// if __meta_kubernetes_service_annotation_prometheus_io_scheme is http or https, replace __scheme__ with its value that is the default replacement: $1.
// this means the user added prometheus.io/scheme in the service's annotation.
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
action: replace
target_label: __metrics_path__
regex: (.+)
// this is also for service annotation of prometheus, if the user overrides the scrape path,
// its value will be put in __metrics_path__
- source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
action: replace
target_label: __address__
regex: (.+)(?::\d+);(\d+)
replacement: $1:$2
// if the user added prometheus.io/port in the service annotation,
// use this port to replace the port in __address__
// all above rules are for handling prometheus annotation: https://github.com/prometheus/prometheus/blob/master/documentation/examples/prometheus-kubernetes.yml
- action: labelmap
regex: __meta_kubernetes_service_label_(.+)
// all __meta_kubernetes_service_label_(.+) will be changed to the (.+)
// e.g. __meta_kubernetes_service_label_app='armada-api' to app='armada-api'
- source_labels: [__meta_kubernetes_namespace]
action: replace
target_label: kubernetes_namespace
// if __meta_kubernetes_namespace matches .*, put its value in label kubernetes_namespace
- source_labels: [__meta_kubernetes_service_name]
action: replace
target_label: service_name
// if __meta_kubernetes_service_name matches .*, put its value in label service_name
- source_labels: [__meta_kubernetes_pod_node_name]
action: replace
target_label: hostname
// if __meta_kubernetes_pod_node_name matches .*, put its value in label hostname
@arpitadlakha
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Thanks this is helpful.

@reachlin
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reachlin commented Nov 9, 2022

@nicocolt thanks. i am working at a start-up now, as an infra. engineer

@zimmnik
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zimmnik commented Dec 23, 2022

Thanks very much!

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