Logcli remote storage. (#1814)

* wip

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

* Start hooking logcli with local storage config.

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

* Fixes org-id and documentation.

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

* Review feedback.

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

cmd/logcli/main.go

@@ -169,6 +169,7 @@ func newQuery(instant bool, cmd *kingpin.CmdClause) *query.Query {
 	cmd.Flag("exclude-label", "Exclude labels given the provided key during output.").StringsVar(&query.IgnoreLabelsKey)
 	cmd.Flag("include-label", "Include labels given the provided key during output.").StringsVar(&query.ShowLabelsKey)
 	cmd.Flag("labels-length", "Set a fixed padding to labels").Default("0").IntVar(&query.FixedLabelsLen)
+	cmd.Flag("store-config", "Execute the current query using a configured storage from a given Loki configuration file.").Default("").StringVar(&query.LocalConfig)
 
 	return query
 }

docs/getting-started/logcli.md

@@ -82,6 +82,7 @@ Flags:
       --tls-skip-verify  Server certificate TLS skip verify.
       --cert=""          Path to the client certificate.
       --key=""           Path to the client certificate key.
+      --org-id=ORG-ID    org ID header to be substituted for auth
 
 Commands:
   help [<command>...]
@@ -115,6 +116,7 @@ Flags:
       --from=FROM        Start looking for logs at this absolute time (inclusive)
       --to=TO            Stop looking for logs at this absolute time (exclusive)
       --forward          Scan forwards through logs.
+      --local-config=""  Execute the current query using a configured storage from a given Loki configuration file.
   -t, --tail             Tail the logs
       --delay-for=0      Delay in tailing by number of seconds to accumulate logs for re-ordering
       --no-labels        Do not print any labels

pkg/logcli/query/query.go

@@ -1,6 +1,7 @@
 package query
 
 import (
+	"context"
 	"fmt"
 	"log"
 	"os"
@@ -12,13 +13,20 @@ import (
 	"github.com/fatih/color"
 	json "github.com/json-iterator/go"
 	"github.com/prometheus/prometheus/promql"
+	"github.com/weaveworks/common/user"
 
+	"github.com/grafana/loki/pkg/cfg"
+	"github.com/grafana/loki/pkg/iter"
 	"github.com/grafana/loki/pkg/logcli/client"
 	"github.com/grafana/loki/pkg/logcli/output"
 	"github.com/grafana/loki/pkg/loghttp"
 	"github.com/grafana/loki/pkg/logproto"
 	"github.com/grafana/loki/pkg/logql"
+	"github.com/grafana/loki/pkg/logql/marshal"
 	"github.com/grafana/loki/pkg/logql/stats"
+	"github.com/grafana/loki/pkg/loki"
+	"github.com/grafana/loki/pkg/storage"
+	"github.com/grafana/loki/pkg/util/validation"
 )
 
 type streamEntryPair struct {
@@ -39,10 +47,20 @@ type Query struct {
 	IgnoreLabelsKey []string
 	ShowLabelsKey   []string
 	FixedLabelsLen  int
+
+	LocalConfig string
 }
 
 // DoQuery executes the query and prints out the results
 func (q *Query) DoQuery(c *client.Client, out output.LogOutput, statistics bool) {
+
+	if q.LocalConfig != "" {
+		if err := q.DoLocalQuery(out, statistics, c.OrgID); err != nil {
+			log.Fatalf("Query failed: %+v", err)
+		}
+		return
+	}
+
 	d := q.resultsDirection()
 
 	var resp *loghttp.QueryResponse
@@ -62,21 +80,81 @@ func (q *Query) DoQuery(c *client.Client, out output.LogOutput, statistics bool)
 		q.printStats(resp.Data.Statistics)
 	}
 
-	switch resp.Data.ResultType {
+	q.printResult(resp.Data.Result, out)
+
+}
+
+func (q *Query) printResult(value loghttp.ResultValue, out output.LogOutput) {
+	switch value.Type() {
 	case logql.ValueTypeStreams:
-		streams := resp.Data.Result.(loghttp.Streams)
-		q.printStream(streams, out)
+		q.printStream(value.(loghttp.Streams), out)
 	case promql.ValueTypeScalar:
-		q.printScalar(resp.Data.Result.(loghttp.Scalar))
+		q.printScalar(value.(loghttp.Scalar))
 	case promql.ValueTypeMatrix:
-		matrix := resp.Data.Result.(loghttp.Matrix)
-		q.printMatrix(matrix)
+		q.printMatrix(value.(loghttp.Matrix))
 	case promql.ValueTypeVector:
-		vector := resp.Data.Result.(loghttp.Vector)
-		q.printVector(vector)
+		q.printVector(value.(loghttp.Vector))
 	default:
-		log.Fatalf("Unable to print unsupported type: %v", resp.Data.ResultType)
+		log.Fatalf("Unable to print unsupported type: %v", value.Type())
+	}
+}
+
+// DoLocalQuery executes the query against the local store using a Loki configuration file.
+func (q *Query) DoLocalQuery(out output.LogOutput, statistics bool, orgID string) error {
+
+	var conf loki.Config
+	if err := cfg.Defaults()(&conf); err != nil {
+		return err
+	}
+	if err := cfg.YAML(&q.LocalConfig)(&conf); err != nil {
+		return err
+	}
+
+	querier, err := localStore(conf)
+	if err != nil {
+		return err
+	}
+
+	eng := logql.NewEngine(conf.Querier.Engine, querier)
+	var query logql.Query
+	if q.isInstant() {
+		query = eng.NewInstantQuery(q.QueryString, q.Start, q.resultsDirection(), uint32(q.Limit))
+	} else {
+		query = eng.NewRangeQuery(q.QueryString, q.Start, q.End, q.Step, q.resultsDirection(), uint32(q.Limit))
+	}
+
+	// execute the query
+	ctx := user.InjectOrgID(context.Background(), orgID)
+	result, err := query.Exec(ctx)
+	if err != nil {
+		return err
+	}
+
+	if statistics {
+		q.printStats(result.Statistics)
+	}
+
+	value, err := marshal.NewResultValue(result.Data)
+	if err != nil {
+		return err
+	}
+
+	q.printResult(value, out)
+	return nil
+}
+
+func localStore(conf loki.Config) (logql.Querier, error) {
+	limits, err := validation.NewOverrides(conf.LimitsConfig, nil)
+	if err != nil {
+		return nil, err
+	}
+	s, err := storage.NewStore(conf.StorageConfig, conf.ChunkStoreConfig, conf.SchemaConfig, limits)
+	if err != nil {
+		return nil, err
 	}
+	return logql.QuerierFunc(func(ctx context.Context, params logql.SelectParams) (iter.EntryIterator, error) {
+		return s.LazyQuery(ctx, params)
+	}), nil
 }
 
 // SetInstant makes the Query an instant type