merge pushgateway into vmagent

[ldpiuaeng]

Is your feature request related to a problem? Please describe.
Is it possible combine pushgateway into vmagent ?

[hagen1778]

Hi! Pushgateway and vmagent are different tools with different APIs. However, they're solving the same problem - pushing data into remote time series database. If that's the case, you can push metrics from your application in any of supported formats directly to vmagent. Unlike pushgateway, vmagent respects provided metrics timestamps and forwards them to VM TSDB accordingly.
Please note, vmagent does not support pushgateway API:

1. no deletion/updates for recorded metrics (curl -X DELETE/PUT) since vmagent works differently - it doesn't wait to be scraped, it forwards accepted metrics as soon as possible.
2. No /metrics/job/<JOB_NAME>/<LABEL_NAME>/<LABEL_VALUE>} path support. Extra labels may be set via extra_label param instead. See https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#how-to-import-data-in-prometheus-exposition-format for details.

[valyala]

The commit 58d459e adds the ability to accept data in Pushgateway protocol via /api/v1/import/prometheus endpoint. For example, the following line pushes metric{label="abc",job="my_app",instance="host123"} 123 metric into VictoriaMetrics:

curl -d 'metric{label="abc"} 123' -X POST 'http://localhost:8428/api/v1/import/prometheus/metrics/job/my_app/instance/host123'

See these docs for more details.

This commit will be included in the next release of VictoriaMetrics.

[valyala]

VictoriaMetrics and vmagent gained support for Pushgateway protocol starting from v1.84.0. Closing this feature request as done.

[valyala]

The related issue - #3636