initial commit - untested

go.mod

@@ -0,0 +1,12 @@
+module oc-monitor
+
+go 1.22.0
+
+require github.com/grafana/loki-client-go v0.0.0-20230116142646-e7494d0ef70c
+
+require (
+	github.com/blang/semver v3.5.1+incompatible // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
+)

loki_logger.go

@@ -0,0 +1,78 @@
+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
+}

main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"log"
+	"os/exec"
+)
+
+func main() {
+	// Initialize LokiLogger
+	lokiLogger := NewLokiLogger("http://localhost:3100/loki/api/v1/push") // Replace with your Loki URL
+
+	// Run the Argo command
+	cmd := exec.Command("argo", "submit", "your-workflow.yaml")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		log.Fatalf("failed to run Argo command: %v", err)
+	}
+
+	// Send logs to Loki
+	if err := lokiLogger.Log(`{job="argo"}`, string(output)); err != nil {
+		log.Fatalf("failed to send logs to Loki: %v", err)
+	}
+
+	log.Println("Logs sent to Loki successfully.")
+}