Info

https://github.com/prometheus/pushgateway
Diagram
Sometimes metrics cannot be scraped
- Example:
  - batch jobs, servers are not reachable due to NAT, firewall
Pushgateway is used as an intermediary service which allows you to push metrics.
Pitfalls
- Most of the times this is a single instance so this results in a SPOF
- Prometheus's automatic instance health monitoring is not possible
- The Pushgateway never forgets the metrics unless they are deleted via the api
  - Example:
Only 1 valid use case for the Pushgateway
- Service-level batch jobs and not related to a specific machine
If NAT or/both firewall is blocking you from using the pull mechanism
- Move the Prometheus server on the same network

Pushing Metrics - Python Example

Info
Python example: Image Added Pushgateway functions take a grouping key. push_to_gateway replaces metrics with the same grouping key pushadd_to_gateway only replaces metrics with the same name and grouping key delete_from_gateway deletes metrics with the given job and grouping key.

Pushing Metrics - Go Example

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Go example: Image Added