The meter reader of lesson 01 has a route sheet: the list of addresses to visit, grouped by neighborhood, with the time of the visit. That sheet is prometheus.yml. A job is a neighborhood (a group of targets of the same kind: api, node-exporter…); a target is a precise address (api:8000); the scrape is the visit: Prometheus does GET http://api:8000/metrics, reads the page, writes everything in the notebook with the time. Every 15 seconds, for each address, without exception.
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