Zakhar Bessarab d52d8ed92b app/{vmstorage,vmselect,vminsert}: introduce metrics metadata storage ...

This commits adds storage part and cluster RPC methods for metrics metadata.
 
 Key concepts:

* vmstorage persists metadata in-memory only.
* vmstorage evicts metadata records older than 1 hour.
* vmstorage stores only the last value of metadata for time series metric name.
* vminsert opens an additional TCP connection to the vmstorage for metrics metadata write requests.
* vmselect implements prometheus compatible HTTP API for reading metrics metadata

This feature is available optional and must be enabled via flag - `-enableMetadata` provided to vminsert/vmsingle.

Fixes github.com/VictoriaMetrics/VictoriaMetrics/issues/2974

2025-11-14 10:12:15 +01:00

..

api.go

app/{vmstorage,vmselect,vminsert}: introduce metrics metadata storage

2025-11-14 10:12:15 +01:00

client.go

app/{vmstorage,vmselect,vminsert}: introduce metrics metadata storage

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server_test.go

app/{vmstorage,vmselect,vminsert}: introduce metrics metadata storage

2025-11-14 10:12:15 +01:00

server.go

app/{vmstorage,vmselect,vminsert}: introduce metrics metadata storage

2025-11-14 10:12:15 +01:00