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receive/handler: deamplify writes through labels #99

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receive/handler: deamplify writes through labels #99

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45 changes: 35 additions & 10 deletions pkg/receive/handler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -819,6 +819,9 @@ func (h *Handler) distributeTimeseriesToReplicas(
defer h.mtx.RUnlock()
remoteWrites := make(map[endpointReplica]map[string]trackedSeries)
localWrites := make(map[endpointReplica]map[string]trackedSeries)

const useMetricLabelsTenant = "_use_metric_labels_tenant_"

for tsIndex, ts := range timeseries {
var tenant = tenantHTTP

Expand All @@ -827,39 +830,61 @@ func (h *Handler) distributeTimeseriesToReplicas(
tenantLabel := lbls.Get(metaLabelTenantID)
if tenantLabel != "" {
tenant = tenantLabel

newLabels := labels.NewBuilder(lbls)
newLabels.Del(metaLabelTenantID)

ts.Labels = labelpb.ZLabelsFromPromLabels(
newLabels.Labels(),
)
}
for _, rn := range replicas {
endpoint, err := h.hashring.GetN(tenant, &ts, rn)
if err != nil {
return nil, nil, err
}

var writeTenant = tenant

endpointReplica := endpointReplica{endpoint: endpoint, replica: rn}
var writeDestination = remoteWrites
if endpoint == h.options.Endpoint {
writeDestination = localWrites

if tenantHTTP == useMetricLabelsTenant {
if tenantLabel == "" {
return nil, nil, fmt.Errorf("tenant label not found in metric labels")
}
writeTenant = tenantLabel

newLabels := labels.NewBuilder(lbls)
newLabels.Del(metaLabelTenantID)

ts.Labels = labelpb.ZLabelsFromPromLabels(
newLabels.Labels(),
)
}
} else {
writeTenant = useMetricLabelsTenant

if tenantLabel == "" {
newLabels := labels.NewBuilder(lbls)
newLabels.Set(metaLabelTenantID, tenantHTTP)

ts.Labels = labelpb.ZLabelsFromPromLabels(
newLabels.Labels(),
)
}
}

writeableSeries, ok := writeDestination[endpointReplica]
if !ok {
writeDestination[endpointReplica] = map[string]trackedSeries{
tenant: {
writeTenant: {
seriesIDs: make([]int, 0),
timeSeries: make([]prompb.TimeSeries, 0),
},
}
}
tenantSeries := writeableSeries[tenant]
tenantSeries := writeableSeries[writeTenant]

tenantSeries.timeSeries = append(tenantSeries.timeSeries, ts)
tenantSeries.seriesIDs = append(tenantSeries.seriesIDs, tsIndex)

writeDestination[endpointReplica][tenant] = tenantSeries
writeDestination[endpointReplica][writeTenant] = tenantSeries
}
}
return localWrites, remoteWrites, nil
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