forked from jaegertracing/jaeger
/
config.go
158 lines (142 loc) · 4.47 KB
/
config.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"context"
"sync"
"time"
"github.com/pkg/errors"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"gopkg.in/olivere/elastic.v5"
"github.com/jaegertracing/jaeger/pkg/es"
storageMetrics "github.com/jaegertracing/jaeger/storage/spanstore/metrics"
)
// Configuration describes the configuration properties needed to connect to an ElasticSearch cluster
type Configuration struct {
Servers []string
Username string
Password string
Sniffer bool // https://github.com/olivere/elastic/wiki/Sniffing
MaxSpanAge time.Duration `yaml:"max_span_age"` // configures the maximum lookback on span reads
NumShards int64 `yaml:"shards"`
NumReplicas int64 `yaml:"replicas"`
BulkSize int
BulkWorkers int
BulkActions int
BulkFlushInterval time.Duration
}
// ClientBuilder creates new es.Client
type ClientBuilder interface {
NewClient(logger *zap.Logger, metricsFactory metrics.Factory) (es.Client, error)
GetNumShards() int64
GetNumReplicas() int64
GetMaxSpanAge() time.Duration
}
// NewClient creates a new ElasticSearch client
func (c *Configuration) NewClient(logger *zap.Logger, metricsFactory metrics.Factory) (es.Client, error) {
if len(c.Servers) < 1 {
return nil, errors.New("No servers specified")
}
rawClient, err := elastic.NewClient(c.GetConfigs()...)
if err != nil {
return nil, err
}
sm := storageMetrics.NewWriteMetrics(metricsFactory, "bulk_index")
m := sync.Map{}
service, err := rawClient.BulkProcessor().
Before(func(id int64, requests []elastic.BulkableRequest) {
m.Store(id, time.Now())
}).
After(func(id int64, requests []elastic.BulkableRequest, response *elastic.BulkResponse, err error) {
start, ok := m.Load(id)
if !ok {
return
}
m.Delete(id)
duration := time.Since(start.(time.Time))
sm.Emit(err, duration)
if err != nil {
failed := len(response.Failed())
total := len(requests)
logger.Error("Elasticsearch could not process bulk request",
zap.Int("request_count", total),
zap.Int("failed_count", failed),
zap.Error(err),
zap.Any("response", response))
}
}).
BulkSize(c.BulkSize).
Workers(c.BulkWorkers).
BulkActions(c.BulkActions).
FlushInterval(c.BulkFlushInterval).
Do(context.Background())
if err != nil {
return nil, err
}
return es.WrapESClient(rawClient, service), nil
}
// ApplyDefaults copies settings from source unless its own value is non-zero.
func (c *Configuration) ApplyDefaults(source *Configuration) {
if c.Username == "" {
c.Username = source.Username
}
if c.Password == "" {
c.Password = source.Password
}
if c.Sniffer == false {
c.Sniffer = source.Sniffer
}
if c.MaxSpanAge == 0 {
c.MaxSpanAge = source.MaxSpanAge
}
if c.NumShards == 0 {
c.NumShards = source.NumShards
}
if c.NumReplicas == 0 {
c.NumReplicas = source.NumReplicas
}
if c.BulkSize == 0 {
c.BulkSize = source.BulkSize
}
if c.BulkWorkers == 0 {
c.BulkWorkers = source.BulkWorkers
}
if c.BulkActions == 0 {
c.BulkActions = source.BulkActions
}
if c.BulkFlushInterval == 0 {
c.BulkFlushInterval = source.BulkFlushInterval
}
}
// GetNumShards returns number of shards from Configuration
func (c *Configuration) GetNumShards() int64 {
return c.NumShards
}
// GetNumReplicas returns number of replicas from Configuration
func (c *Configuration) GetNumReplicas() int64 {
return c.NumReplicas
}
// GetMaxSpanAge returns max span age from Configuration
func (c *Configuration) GetMaxSpanAge() time.Duration {
return c.MaxSpanAge
}
// GetConfigs wraps the configs to feed to the ElasticSearch client init
func (c *Configuration) GetConfigs() []elastic.ClientOptionFunc {
options := make([]elastic.ClientOptionFunc, 3)
options[0] = elastic.SetURL(c.Servers...)
options[1] = elastic.SetBasicAuth(c.Username, c.Password)
options[2] = elastic.SetSniff(c.Sniffer)
return options
}