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Limiting query start time with config #572

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merged 7 commits into from
May 15, 2019
Merged

Limiting query start time with config #572

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30e4c65
Limiting query start time with config
sandeepsukhani May 11, 2019
246dba8
Fixed maxLookBackPeriod check, added it to existing configs, some oth…
sandeepsukhani May 13, 2019
989c7be
gofmted file
sandeepsukhani May 13, 2019
ecb6e27
Changed maxLookBackPeriod to 4 weeks in helm chart
sandeepsukhani May 13, 2019
6d5d6e2
Setting maxLookBackPeriod in helm chart to 0 and bumping up the helm …
sandeepsukhani May 15, 2019
60a6f64
changed maxLookBackPeriod in yaml in cmd to 0 and some nit
sandeepsukhani May 15, 2019
71112f0
Merge remote-tracking branch 'upstream/master' into query-max-lookback
sandeepsukhani May 15, 2019
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3 changes: 3 additions & 0 deletions cmd/loki/loki-local-config.yaml
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Expand Up @@ -30,3 +30,6 @@ storage_config:

limits_config:
enforce_metric_name: false

querier:
max_look_back_period: 672h
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Can you change this also to 0?

11 changes: 11 additions & 0 deletions pkg/querier/querier.go
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Expand Up @@ -3,6 +3,7 @@ package querier
import (
"context"
"flag"
"time"

"github.com/cortexproject/cortex/pkg/chunk"
cortex_client "github.com/cortexproject/cortex/pkg/ingester/client"
Expand All @@ -18,10 +19,13 @@ import (

// Config for a querier.
type Config struct {
// Limits query start time to be greater than now() - MaxLookBackPeriod, if set
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Comments should end with .

MaxLookBackPeriod time.Duration `yaml:"max_look_back_period"`
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Can you add a comment above the field too?

}

// RegisterFlags register flags.
func (cfg *Config) RegisterFlags(f *flag.FlagSet) {
f.DurationVar(&cfg.MaxLookBackPeriod, "querier.max_look_back_period", 0, "Limit how long back data can be queried")
}

// Querier handlers queries.
Expand Down Expand Up @@ -92,6 +96,13 @@ func (q *Querier) forAllIngesters(f func(logproto.QuerierClient) (interface{}, e

// Query does the heavy lifting for an actual query.
func (q *Querier) Query(ctx context.Context, req *logproto.QueryRequest) (*logproto.QueryResponse, error) {
if q.cfg.MaxLookBackPeriod != 0 {
oldestStartTime := time.Now().Add(-q.cfg.MaxLookBackPeriod)
if oldestStartTime.After(req.Start) {
req.Start = oldestStartTime
}
}

ingesterIterators, err := q.queryIngesters(ctx, req)
if err != nil {
return nil, err
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2 changes: 2 additions & 0 deletions production/helm/loki/values.yaml
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Expand Up @@ -56,6 +56,8 @@ config:
directory: /data/loki/index
filesystem:
directory: /data/loki/chunks
querier:
max_look_back_period: '672h'

deploymentStrategy: RollingUpdate

Expand Down