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mapping.go
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mapping.go
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// Copyright (c) 2021 The Jaeger Authors.
//
// 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 mappings
import (
"bytes"
"embed"
"strings"
"github.com/jaegertracing/jaeger/pkg/es"
)
//go:embed *.json
// MAPPINGS contains embedded index templates.
var MAPPINGS embed.FS
// MappingBuilder holds parameters required to render an elasticsearch index template
type MappingBuilder struct {
TemplateBuilder es.TemplateBuilder
Shards int64
Replicas int64
EsVersion uint
IndexPrefix string
UseILM bool
ILMPolicyName string
}
// GetMapping returns the rendered mapping based on elasticsearch version
func (mb *MappingBuilder) GetMapping(mapping string) (string, error) {
if mb.EsVersion == 7 {
return mb.fixMapping(mapping + "-7.json")
}
return mb.fixMapping(mapping + ".json")
}
// GetSpanServiceMappings returns span and service mappings
func (mb *MappingBuilder) GetSpanServiceMappings() (string, string, error) {
spanMapping, err := mb.GetMapping("jaeger-span")
if err != nil {
return "", "", err
}
serviceMapping, err := mb.GetMapping("jaeger-service")
if err != nil {
return "", "", err
}
return spanMapping, serviceMapping, nil
}
// GetDependenciesMappings returns dependencies mappings
func (mb *MappingBuilder) GetDependenciesMappings() (string, error) {
return mb.GetMapping("jaeger-dependencies")
}
func loadMapping(name string) string {
s, _ := MAPPINGS.ReadFile(name)
return string(s)
}
func (mb *MappingBuilder) fixMapping(mapping string) (string, error) {
tmpl, err := mb.TemplateBuilder.Parse(loadMapping(mapping))
if err != nil {
return "", err
}
writer := new(bytes.Buffer)
if mb.IndexPrefix != "" && !strings.HasSuffix(mb.IndexPrefix, "-") {
mb.IndexPrefix += "-"
}
if err := tmpl.Execute(writer, mb); err != nil {
return "", err
}
return writer.String(), nil
}