oc-monitord/loki_logger.go
2024-07-04 09:14:25 +02:00

79 lines
1.3 KiB
Go

package main
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"time"
)
type LokiLogger struct {
url string
client *http.Client
}
func NewLokiLogger(url string) *LokiLogger {
return &LokiLogger{
url: url,
client: &http.Client{Timeout: 10 * time.Second},
}
}
type logEntry struct {
Timestamp int64 `json:"ts"`
Line string `json:"line"`
}
type logStream struct {
Labels string `json:"labels"`
Entries []logEntry `json:"entries"`
}
type pushRequest struct {
Streams []logStream `json:"streams"`
}
func (l *LokiLogger) Log(label string, message string) error {
entry := logEntry{
Timestamp: time.Now().UnixNano(),
Line: message,
}
stream := logStream{
Labels: label,
Entries: []logEntry{entry},
}
reqBody := pushRequest{
Streams: []logStream{stream},
}
body, err := json.Marshal(reqBody)
if err != nil {
return err
}
req, err := http.NewRequest("POST", l.url, bytes.NewBuffer(body))
if err != nil {
return err
}
req.Header.Set("Content-Type", "application/json")
resp, err := l.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusNoContent {
return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
}
return nil
}
func (l *LokiLogger) Close() {
// No cleanup needed for pure HTTP client
}