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prometheus.go
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prometheus.go
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package etcd
import (
"context"
"os"
"strings"
"time"
"github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/mvcc/mvccpb"
"github.com/douyu/juno-agent/util"
"github.com/douyu/jupiter/pkg/xlog"
)
func (d *DataSource) watchPrometheus(path string) {
// etcd的key用作配置数据读取
hostKey := strings.Join([]string{"/prometheus", "job"}, "/")
// init watch
watch, err := d.etcdClient.WatchPrefix(context.Background(), hostKey)
if err != nil {
panic("watch err: " + err.Error())
}
go func() {
for {
select {
case event := <-watch.C():
switch event.Type {
case mvccpb.DELETE:
key, value := string(event.Kv.Key), string(event.Kv.Value)
keyArr := strings.Split(key, "/")
if len(keyArr) != 5 && len(keyArr) != 6 {
xlog.Error("watchPrometheus", xlog.String("key", key), xlog.String("value", value))
break
}
filename := keyArr[3] + "_" + value
_ = os.Remove(path + "/" + filename + ".yml")
case mvccpb.PUT:
key, value := string(event.Kv.Key), string(event.Kv.Value)
keyArr := strings.Split(key, "/")
if len(keyArr) != 5 && len(keyArr) != 6 {
xlog.Error("watchPrometheus", xlog.String("key", key), xlog.String("value", value))
break
}
filename := keyArr[3] + "_" + value
content := `
- targets:
- "` + value + `"
labels:
instance: ` + keyArr[4] + `
job: ` + keyArr[3]
_ = util.WriteFile(path+"/"+filename+".yml", content)
}
}
}
}()
}
// PrometheusConfigScanner ..
func (d *DataSource) PrometheusConfigScanner(path string) {
// etcd的key用作配置数据读取
hostKey := strings.Join([]string{"/prometheus", "job"}, "/")
ctx, cancel := context.WithTimeout(context.Background(), time.Second*3)
defer cancel()
resp, err := d.etcdClient.Get(ctx, hostKey, clientv3.WithPrefix())
if err != nil {
xlog.Error("init get hostKey error", xlog.String("plugin", "confgo"), xlog.String("msg", err.Error()), xlog.String("hostKey", hostKey))
return
}
for _, kv := range resp.Kvs {
key, value := string(kv.Key), string(kv.Value)
keyArr := strings.Split(key, "/")
if len(keyArr) != 5 && len(keyArr) != 6 {
xlog.Error("PrometheusConfigScanner", xlog.String("key", key), xlog.String("value", value))
continue
}
filename := keyArr[3] + "_" + value
content := `
- targets:
- "` + value + `"
labels:
instance: ` + keyArr[4] + `
job: ` + keyArr[3]
_ = util.WriteFile(path+"/"+filename+".yml", content)
}
return
}