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sample prometheus configuration explained
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// 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 |
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