68 lines
1.5 KiB
Markdown
68 lines
1.5 KiB
Markdown
# prometheus-exporter-merger
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Merges Prometheus metrics from multiple sources.
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## But Why?!
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Sometimes you need to scrape Prometheus metrics from multiple containers in a single pod,
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but you can't do this using annotations: [prometheus/prometheus#3756](https://github.com/prometheus/prometheus/issues/3756).
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To start the exporter:
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```
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prometheus-exporter-merger --config /config/prometheus-exporter-merger.yaml
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```
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Config example:
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```yaml
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listen: :8080
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scrap_timeout: 20s
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sources:
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- url: http://127.0.0.1:8081/metrics
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labels:
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keyX: valueX
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keyY: Y
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- url: http://127.0.0.1:8082/metrics
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labels:
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key2: Z
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```
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Another way to pass configuration by setting environment variables:
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```bash
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export LISTEN=":8080"
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export SCRAPE_TIMEOUT="20s"
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export URL_1=http://127.0.0.1:801/api/v1/metrics/prometheus,keyX:valueX,keyY:Y
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export URL_2=http://0.0.0.0:7070/api/v1/metrics/prometheus,key2:Z
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```
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## Kubernetes
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The prometheus-exporter-merger is supposed to run as a sidecar.
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```yaml
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...
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template:
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metadata:
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annotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "8080"
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...
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spec:
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containers:
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...
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- name: prometheus-exporter-merger
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image: vadv/prometheus-exporter-merger
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env:
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- name: LISTEN
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value: :8080
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- name: SCRAPE_TIMEOUT
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value: 20s
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- name: URL_COMMON
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value: http://127.0.0.1:8081/api/v1/metrics/prometheus,type:common
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- name: URL_AUDIT
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value: http://127.0.0.1:8082/api/v1/metrics/prometheus,type:audit
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...
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```
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