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d52d8ed92b
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
31 lines
679 B
Go
31 lines
679 B
Go
package vminsertapi
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import (
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage/metricsmetadata"
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)
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// RPCCall defines rpc call from vminsert to vmstorage
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type RPCCall struct {
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Name string
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VersionedName string
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}
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var (
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MetricRowsRpcCall = RPCCall{
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Name: "metric_rows",
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VersionedName: "writeRows_v1",
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}
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MetricMetadataRpcCall = RPCCall{
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Name: "metricmetadata_rows",
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VersionedName: "writeMetadata_v1",
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}
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)
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// API must implement vminsert API.
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type API interface {
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WriteRows(rows []storage.MetricRow) error
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WriteMetadata(mrs []metricsmetadata.Row) error
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IsReadOnly() bool
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}
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