Prometheus

• It's created to monitor highly dynamic container environments
• Constantly monitor all the service and alerts when it crashes

Components

• Retrieval
• Worker that pulls the metrics data
• Pulls from HTTP endpoints
• Default endpoint for the service: {host}/metrics
• The target must expose this /metrics route
• The metrics must be exposed in the correct format
• For services that do not expose /metrics by default it needs an exporter (to format and expose the metrics)
• For short-lived jobs the application push then into a pushgateway and prometheus scrapes from the pushgateway
• Storage
• Time series DB to store metrics data
• Stores the data in Disk
• Can also integrate with Remote Storage Systems
• HTTP server
• Accept PromSQL queries to consult the storage
• Prometheus exposes its own /metrics endpoint