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Loki: Improve error logging in case statusCode is not 200 (#75075)

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* improve loki logging

* fix error log

* fix logger arg
This commit is contained in:
Sven Grossmann 2023-09-19 11:11:27 +02:00 committed by GitHub
parent b6bb22a67a
commit 727c83d562
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 17 additions and 10 deletions
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10
pkg/tsdb/loki/api.go
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@ -177,18 +177,22 @@ func (api *LokiAPI) DataQuery(ctx context.Context, query lokiQuery, responseOpts
return nil, err
}
api.log.Info("Response received from loki", "duration", time.Since(start), "statusCode", resp.StatusCode, "contentLength", resp.Header.Get("Content-Length"), "stage", stageDatabaseRequest, "status", "ok", "query", query.Expr)
defer func() {
if err := resp.Body.Close(); err != nil {
api.log.Warn("Failed to close response body", "error", err)
}
}()
lp := []any{"duration", time.Since(start), "stage", stageDatabaseRequest, "statusCode", resp.StatusCode, "contentLength", resp.Header.Get("Content-Length")}
lp = append(lp, queryAttrs...)
if resp.StatusCode/100 != 2 {
err := readLokiError(resp.Body)
api.log.Error("Error received from loki", "error", err, "status", resp.StatusCode)
lp = append(lp, "status", "error", "error", err)
api.log.Error("Error received from Loki", lp...)
return nil, err
} else {
lp = append(lp, "status", "ok")
api.log.Info("Response received from loki", lp...)
}
start = time.Now()

5
pkg/tsdb/loki/framing_test.go
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@ -10,6 +10,7 @@ import (
"github.com/grafana/grafana-plugin-sdk-go/backend"
"github.com/grafana/grafana-plugin-sdk-go/experimental"
"github.com/grafana/grafana/pkg/infra/log"
"github.com/stretchr/testify/require"
)
@ -60,7 +61,7 @@ func TestSuccessResponse(t *testing.T) {
bytes, err := os.ReadFile(responseFileName)
require.NoError(t, err)
frames, err := runQuery(context.Background(), makeMockedAPI(http.StatusOK, "application/json", bytes, nil), &query, responseOpts)
frames, err := runQuery(context.Background(), makeMockedAPI(http.StatusOK, "application/json", bytes, nil), &query, responseOpts, log.New("test"))
require.NoError(t, err)
dr := &backend.DataResponse{
@ -125,7 +126,7 @@ func TestErrorResponse(t *testing.T) {
for _, test := range tt {
t.Run(test.name, func(t *testing.T) {
frames, err := runQuery(context.Background(), makeMockedAPI(400, test.contentType, test.body, nil), &lokiQuery{QueryType: QueryTypeRange, Direction: DirectionBackward}, ResponseOpts{})
frames, err := runQuery(context.Background(), makeMockedAPI(400, test.contentType, test.body, nil), &lokiQuery{QueryType: QueryTypeRange, Direction: DirectionBackward}, ResponseOpts{}, log.New("test"))
require.Len(t, frames, 0)
require.Error(t, err)

8
pkg/tsdb/loki/loki.go
View File

@ -200,7 +200,7 @@ func queryData(ctx context.Context, req *backend.QueryDataRequest, dsInfo *datas
span.SetAttributes("query_group_id", req.GetHTTPHeader("X-Query-Group-Id"), attribute.Key("query_group_id").String(req.GetHTTPHeader("X-Query-Group-Id")))
}
frames, err := runQuery(ctx, api, query, responseOpts)
frames, err := runQuery(ctx, api, query, responseOpts, plog)
queryRes := backend.DataResponse{}
@ -219,10 +219,10 @@ func queryData(ctx context.Context, req *backend.QueryDataRequest, dsInfo *datas
}
// we extracted this part of the functionality to make it easy to unit-test it
func runQuery(ctx context.Context, api *LokiAPI, query *lokiQuery, responseOpts ResponseOpts) (data.Frames, error) {
func runQuery(ctx context.Context, api *LokiAPI, query *lokiQuery, responseOpts ResponseOpts, plog log.Logger) (data.Frames, error) {
frames, err := api.DataQuery(ctx, *query, responseOpts)
if err != nil {
logger.Error("Error querying loki", "error", err)
plog.Error("Error querying loki", "error", err)
return data.Frames{}, err
}
@ -230,7 +230,7 @@ func runQuery(ctx context.Context, api *LokiAPI, query *lokiQuery, responseOpts
err = adjustFrame(frame, query, !responseOpts.metricDataplane, responseOpts.logsDataplane)
if err != nil {
logger.Error("Error adjusting frame", "error", err)
plog.Error("Error adjusting frame", "error", err)
return data.Frames{}, err
}
}

4
pkg/tsdb/loki/loki_bench_test.go
View File

@ -7,6 +7,8 @@ import (
"net/http"
"strings"
"testing"
"github.com/grafana/grafana/pkg/infra/log"
)
// when memory-profiling these benchmarks these commands are recommended
@ -17,7 +19,7 @@ func BenchmarkMatrixJson(b *testing.B) {
b.ResetTimer()
for n := 0; n < b.N; n++ {
_, _ = runQuery(context.Background(), makeMockedAPI(http.StatusOK, "application/json", bytes, nil), &lokiQuery{}, ResponseOpts{})
_, _ = runQuery(context.Background(), makeMockedAPI(http.StatusOK, "application/json", bytes, nil), &lokiQuery{}, ResponseOpts{}, log.New("test"))
}
}