lyft-discovery-prometheus-file-sd

Exporter from lyft/discovery to Prometheus file_sd format.

Prometheus supports number of service-discovery mechanisms. One of them is file-based. To be able to use lyft/dyscovery as a service discovery for Prometheus we can simply periodically download full list of services metadata from the lyft/discovery and convert it into Prometheus file_sd format. That is exactly the purpose of this simple tool.

The tool periodically downloads metadata from Lyft/discovery, converts it into Prometheus file_sd format (it uses host/tag/metrics_ports comma-separated value, all hosts without the tag will be skept, so make sure you're using lyft-discovery-registrator >= 1.0.1) and stores set of files (one per metrics port, see also lyft-discovery-registrator) into /tmp/out directory, so file names look like /tmp/out/file_sd_8001.json, /tmp/out/file_sd_10000.json. That directory can be mounted to Prometheus container and consumed by file_sd mechanism.

Environment variables for Docker container:

• DISCOVERY_URL - URL of Lyft/discovery
• SERVICE_REPO_NAME - service repository name in Lyft/discovery
• INITIAL_DELAY - initial delay in seconds, default is 1
• REFRESH_INTERVAL - refresh interval in seconds, default is 10