81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
package etcd
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import (
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"context"
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"encoding/json"
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"fmt"
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clientv3 "go.etcd.io/etcd/client/v3"
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"time"
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)
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var (
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cli *clientv3.Client
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)
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//需要手机的日志的配置信息
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type LogEntry struct {
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Path string `json:"path"` //日志存放的路径
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Topic string `json:"topic"` //日志要发往kafka中的哪个Topic
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}
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//初始化etcd
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func Init(addr string, timeout time.Duration) (err error) {
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cli, err = clientv3.New(clientv3.Config{
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Endpoints: []string{addr},
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DialTimeout: timeout,
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})
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if err != nil {
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//handle error!
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fmt.Println("connect etcd server failed,error:", err)
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return
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}
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fmt.Println("connect etcd server success")
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return
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}
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// 从etcd中根据key获取配置项
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func GetConf(key string) (logEntryConf []*LogEntry, err error) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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resp, err := cli.Get(ctx, key)
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cancel()
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if err != nil {
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fmt.Println("get etcd config failed,error:", err)
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}
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for _, ev := range resp.Kvs {
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err = json.Unmarshal(ev.Value, &logEntryConf)
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if err != nil {
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fmt.Println("parse etcd config failed,error:", err)
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return
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}
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}
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return
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}
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//etcd的哨兵
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func Watcher(key string, newConfCh chan<- []*LogEntry) {
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ch := cli.Watch(context.Background(), key)
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for w := range ch {
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for _, evt := range w.Events {
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fmt.Printf("index:%v value:%v\n", evt.Type, string(evt.Kv.Value))
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//通知taillog.tailTskMgr
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//1.先判断操作的类型
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var newConf []*LogEntry
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if evt.Type != clientv3.EventTypeDelete {
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err := json.Unmarshal(evt.Kv.Value, &newConf)
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if err != nil {
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fmt.Println("parse etcd config failed,error:", err)
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continue
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}
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}
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fmt.Println("get etcd new config success", newConf)
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newConfCh <- newConf
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}
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}
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}
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