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grpc.go
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grpc.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package v1
import (
"context"
"time"
"github.com/prometheus/prometheus/promql"
"github.com/prometheus/prometheus/storage"
"github.com/thanos-io/promql-engine/logicalplan"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/thanos-io/thanos/pkg/api/query/querypb"
"github.com/thanos-io/thanos/pkg/query"
"github.com/thanos-io/thanos/pkg/store/labelpb"
"github.com/thanos-io/thanos/pkg/store/storepb/prompb"
)
type GRPCAPI struct {
now func() time.Time
replicaLabels []string
queryableCreate query.QueryableCreator
engineFactory *QueryEngineFactory
defaultEngine querypb.EngineType
lookbackDeltaCreate func(int64) time.Duration
defaultMaxResolutionSeconds time.Duration
}
func NewGRPCAPI(
now func() time.Time,
replicaLabels []string,
creator query.QueryableCreator,
engineFactory *QueryEngineFactory,
defaultEngine querypb.EngineType,
lookbackDeltaCreate func(int64) time.Duration,
defaultMaxResolutionSeconds time.Duration,
) *GRPCAPI {
return &GRPCAPI{
now: now,
replicaLabels: replicaLabels,
queryableCreate: creator,
engineFactory: engineFactory,
defaultEngine: defaultEngine,
lookbackDeltaCreate: lookbackDeltaCreate,
defaultMaxResolutionSeconds: defaultMaxResolutionSeconds,
}
}
func RegisterQueryServer(queryServer querypb.QueryServer) func(*grpc.Server) {
return func(s *grpc.Server) {
querypb.RegisterQueryServer(s, queryServer)
}
}
func (g *GRPCAPI) Query(request *querypb.QueryRequest, server querypb.Query_QueryServer) error {
ctx := server.Context()
if request.TimeoutSeconds != 0 {
var cancel context.CancelFunc
timeout := time.Duration(request.TimeoutSeconds) * time.Second
ctx, cancel = context.WithTimeout(ctx, timeout)
defer cancel()
}
maxResolution := request.MaxResolutionSeconds
if request.MaxResolutionSeconds == 0 {
maxResolution = g.defaultMaxResolutionSeconds.Milliseconds() / 1000
}
storeMatchers, err := querypb.StoreMatchersToLabelMatchers(request.StoreMatchers)
if err != nil {
return err
}
replicaLabels := g.replicaLabels
if len(request.ReplicaLabels) != 0 {
replicaLabels = request.ReplicaLabels
}
queryable := g.queryableCreate(
request.EnableDedup,
replicaLabels,
storeMatchers,
maxResolution,
request.EnablePartialResponse,
false,
request.ShardInfo,
query.NoopSeriesStatsReporter,
)
qry, err := g.getQueryForEngine(ctx, request, queryable, maxResolution)
if err != nil {
return err
}
defer qry.Close()
result := qry.Exec(ctx)
if result.Err != nil {
return status.Error(codes.Aborted, result.Err.Error())
}
if len(result.Warnings) != 0 {
if err := server.Send(querypb.NewQueryWarningsResponse(result.Warnings.AsErrors()...)); err != nil {
return err
}
}
switch vector := result.Value.(type) {
case promql.Scalar:
series := &prompb.TimeSeries{
Samples: []prompb.Sample{{Value: vector.V, Timestamp: vector.T}},
}
if err := server.Send(querypb.NewQueryResponse(series)); err != nil {
return err
}
case promql.Vector:
for _, sample := range vector {
floats, histograms := prompb.SamplesFromPromqlSamples(sample)
series := &prompb.TimeSeries{
Labels: labelpb.ZLabelsFromPromLabels(sample.Metric),
Samples: floats,
Histograms: histograms,
}
if err := server.Send(querypb.NewQueryResponse(series)); err != nil {
return err
}
}
return nil
}
return nil
}
func (g *GRPCAPI) getQueryForEngine(ctx context.Context, request *querypb.QueryRequest, queryable storage.Queryable, maxResolution int64) (promql.Query, error) {
lookbackDelta := g.lookbackDeltaCreate(maxResolution * 1000)
if request.LookbackDeltaSeconds > 0 {
lookbackDelta = time.Duration(request.LookbackDeltaSeconds) * time.Second
}
engineParam := request.Engine
if engineParam == querypb.EngineType_default {
engineParam = g.defaultEngine
}
var ts time.Time
if request.TimeSeconds == 0 {
ts = g.now()
} else {
ts = time.Unix(request.TimeSeconds, 0)
}
switch engineParam {
case querypb.EngineType_prometheus:
queryEngine := g.engineFactory.GetPrometheusEngine()
return queryEngine.NewInstantQuery(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), request.Query, ts)
case querypb.EngineType_thanos:
queryEngine := g.engineFactory.GetThanosEngine()
plan, err := logicalplan.Unmarshal(request.QueryPlan.GetJson())
if err != nil {
return queryEngine.NewInstantQuery(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), request.Query, ts)
}
return queryEngine.NewInstantQueryFromPlan(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), plan, ts)
default:
return nil, status.Error(codes.InvalidArgument, "invalid engine parameter")
}
}
func (g *GRPCAPI) QueryRange(request *querypb.QueryRangeRequest, srv querypb.Query_QueryRangeServer) error {
ctx := srv.Context()
if request.TimeoutSeconds != 0 {
var cancel context.CancelFunc
timeout := time.Duration(request.TimeoutSeconds) * time.Second
ctx, cancel = context.WithTimeout(ctx, timeout)
defer cancel()
}
maxResolution := request.MaxResolutionSeconds
if request.MaxResolutionSeconds == 0 {
maxResolution = g.defaultMaxResolutionSeconds.Milliseconds() / 1000
}
storeMatchers, err := querypb.StoreMatchersToLabelMatchers(request.StoreMatchers)
if err != nil {
return err
}
replicaLabels := g.replicaLabels
if len(request.ReplicaLabels) != 0 {
replicaLabels = request.ReplicaLabels
}
queryable := g.queryableCreate(
request.EnableDedup,
replicaLabels,
storeMatchers,
maxResolution,
request.EnablePartialResponse,
false,
request.ShardInfo,
query.NoopSeriesStatsReporter,
)
qry, err := g.getRangeQueryForEngine(ctx, request, queryable)
if err != nil {
return err
}
defer qry.Close()
result := qry.Exec(ctx)
if result.Err != nil {
return status.Error(codes.Aborted, result.Err.Error())
}
if len(result.Warnings) != 0 {
if err := srv.Send(querypb.NewQueryRangeWarningsResponse(result.Warnings.AsErrors()...)); err != nil {
return err
}
}
switch value := result.Value.(type) {
case promql.Matrix:
for _, series := range value {
floats, histograms := prompb.SamplesFromPromqlSeries(series)
series := &prompb.TimeSeries{
Labels: labelpb.ZLabelsFromPromLabels(series.Metric),
Samples: floats,
Histograms: histograms,
}
if err := srv.Send(querypb.NewQueryRangeResponse(series)); err != nil {
return err
}
}
case promql.Vector:
for _, sample := range value {
floats, histograms := prompb.SamplesFromPromqlSamples(sample)
series := &prompb.TimeSeries{
Labels: labelpb.ZLabelsFromPromLabels(sample.Metric),
Samples: floats,
Histograms: histograms,
}
if err := srv.Send(querypb.NewQueryRangeResponse(series)); err != nil {
return err
}
}
return nil
case promql.Scalar:
series := &prompb.TimeSeries{
Samples: []prompb.Sample{{Value: value.V, Timestamp: value.T}},
}
return srv.Send(querypb.NewQueryRangeResponse(series))
}
return nil
}
func (g *GRPCAPI) getRangeQueryForEngine(
ctx context.Context,
request *querypb.QueryRangeRequest,
queryable storage.Queryable,
) (promql.Query, error) {
startTime := time.Unix(request.StartTimeSeconds, 0)
endTime := time.Unix(request.EndTimeSeconds, 0)
interval := time.Duration(request.IntervalSeconds) * time.Second
engineParam := request.Engine
if engineParam == querypb.EngineType_default {
engineParam = g.defaultEngine
}
maxResolution := request.MaxResolutionSeconds
if request.MaxResolutionSeconds == 0 {
maxResolution = g.defaultMaxResolutionSeconds.Milliseconds() / 1000
}
lookbackDelta := g.lookbackDeltaCreate(maxResolution * 1000)
if request.LookbackDeltaSeconds > 0 {
lookbackDelta = time.Duration(request.LookbackDeltaSeconds) * time.Second
}
switch engineParam {
case querypb.EngineType_prometheus:
queryEngine := g.engineFactory.GetPrometheusEngine()
return queryEngine.NewRangeQuery(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), request.Query, startTime, endTime, interval)
case querypb.EngineType_thanos:
thanosEngine := g.engineFactory.GetThanosEngine()
plan, err := logicalplan.Unmarshal(request.QueryPlan.GetJson())
if err != nil {
return thanosEngine.NewRangeQuery(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), request.Query, startTime, endTime, interval)
}
return thanosEngine.NewRangeQueryFromPlan(ctx, queryable, promql.NewPrometheusQueryOpts(false, lookbackDelta), plan, startTime, endTime, interval)
default:
return nil, status.Error(codes.InvalidArgument, "invalid engine parameter")
}
}