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sls.go
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sls.go
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package sls
import (
"encoding/json"
"fmt"
"sync"
"github.com/gogap/config"
"github.com/gogap/logrus_mate"
"github.com/aliyun/aliyun-log-go-sdk"
"github.com/gogo/protobuf/proto"
"github.com/sirupsen/logrus"
)
var allLevels = []logrus.Level{
logrus.DebugLevel,
logrus.InfoLevel,
logrus.WarnLevel,
logrus.ErrorLevel,
logrus.FatalLevel,
logrus.PanicLevel,
}
type SLSHookConfig struct {
Endpoint string
AccessKeyID string
AccessKeySecret string
Project string
Store string
StoreField string
TopicField string
SourceField string
TagsField string
ContextField string
Levels []string
Async bool
}
func init() {
logrus_mate.RegisterHook("sls", NewSLSHook)
}
func NewSLSHook(config config.Configuration) (hook logrus.Hook, err error) {
conf := SLSHookConfig{}
if config != nil {
conf.Endpoint = config.GetString("endpoint")
conf.AccessKeyID = config.GetString("access-key-id")
conf.AccessKeySecret = config.GetString("access-key-secret")
conf.Project = config.GetString("project")
conf.Store = config.GetString("store")
conf.StoreField = config.GetString("fields.store")
conf.TopicField = config.GetString("fields.topic", "topic")
conf.SourceField = config.GetString("fields.source", "source")
conf.ContextField = config.GetString("fields.context")
conf.TagsField = config.GetString("fields.tags")
conf.Levels = config.GetStringList("levels")
conf.Async = config.GetBoolean("async")
}
levels := []logrus.Level{}
if conf.Levels != nil {
for _, level := range conf.Levels {
if lv, e := logrus.ParseLevel(level); e != nil {
err = e
return
} else {
levels = append(levels, lv)
}
}
}
if len(levels) == 0 && conf.Levels != nil {
levels = append(levels, logrus.ErrorLevel, logrus.PanicLevel, logrus.FatalLevel)
}
slsHook := &SLSHook{
AcceptedLevels: levels,
Config: conf,
}
proj, err := sls.NewLogProject(conf.Project, conf.Endpoint, conf.AccessKeyID, conf.AccessKeySecret)
if err != nil {
return
}
slsHook.Config = conf
slsHook.project = proj
hook = slsHook
return
}
type SLSHook struct {
AcceptedLevels []logrus.Level
Config SLSHookConfig
mapStores sync.Map
project *sls.LogProject
}
// Levels sets which levels to sent to sls
func (p *SLSHook) Levels() []logrus.Level {
if p.AcceptedLevels == nil {
return allLevels
}
return p.AcceptedLevels
}
// Fire - Sent event to sls
func (p *SLSHook) Fire(entry *logrus.Entry) (err error) {
storeName := p.Config.Store
if len(p.Config.StoreField) > 0 {
if specStoreName, ok := entry.Data[p.Config.StoreField].(string); ok {
storeName = specStoreName
}
}
store, storeExist := p.mapStores.Load(storeName)
if !storeExist {
newStore, newStoreErr := sls.NewLogStore(storeName, p.project)
if newStoreErr != nil {
return newStoreErr
}
store, _ = p.mapStores.LoadOrStore(storeName, newStore)
}
ignoreToSend := map[string]bool{}
ignoreToSend[p.Config.Store] = true
logStore, ok := store.(*sls.LogStore)
if !ok {
err = fmt.Errorf("could not convert %s into *sls.LogStore in log store maps", storeName)
return
}
slsLog := &sls.Log{Time: proto.Uint32(uint32(entry.Time.Unix()))}
var strCtx string
if len(p.Config.ContextField) > 0 {
if ctxData, exist := entry.Data[p.Config.ContextField]; exist {
if ctx, ok := ctxData.(string); ok {
strCtx = ctx
} else {
jsonData, errJson := json.Marshal(ctxData)
if errJson != nil {
return errJson
}
strCtx = string(jsonData)
}
ignoreToSend[p.Config.ContextField] = true
slsLog.Contents = append(slsLog.Contents,
&sls.LogContent{
Key: proto.String(p.Config.ContextField),
Value: proto.String(strCtx),
})
}
}
topic := proto.String(fieldToString(entry, p.Config.TopicField))
source := proto.String(fieldToString(entry, p.Config.SourceField))
ignoreToSend[p.Config.TopicField] = true
ignoreToSend[p.Config.SourceField] = true
if len(entry.Data) > 0 {
for k, v := range entry.Data {
if ignoreToSend[k] {
continue
}
content := &sls.LogContent{
Key: proto.String(k),
Value: proto.String(fmt.Sprintf("%v", v)),
}
slsLog.Contents = append(slsLog.Contents, content)
}
}
slsLog.Contents = append(slsLog.Contents,
&sls.LogContent{
Key: proto.String("message"),
Value: proto.String(entry.Message),
})
slsLog.Contents = append(slsLog.Contents,
&sls.LogContent{
Key: proto.String("log_level"),
Value: proto.String(entry.Level.String()),
})
var slsTags []*sls.LogTag
if len(p.Config.TagsField) > 0 {
logrusTags, ok := entry.Data[p.Config.TagsField].(map[string]string)
if ok {
for k, v := range logrusTags {
slsTags = append(slsTags,
&sls.LogTag{
Key: proto.String(k),
Value: proto.String(v),
})
}
}
}
logGroup := &sls.LogGroup{
Topic: topic,
Source: source,
Logs: []*sls.Log{slsLog},
LogTags: slsTags,
}
if p.Config.Async {
go logStore.PutLogs(logGroup)
return
}
err = logStore.PutLogs(logGroup)
return
}
func fieldToString(entry *logrus.Entry, key string) string {
fieldValue, exist := entry.Data[key]
if !exist {
return ""
}
return fmt.Sprintf("%v", fieldValue)
}