chore: add backup app

pkg/core/backup/timer/qiniu/qiniu.go

@@ -0,0 +1,77 @@
+// Package qiniu provides ...
+package qiniu
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"time"
+
+	"github.com/eiblog/eiblog/pkg/config"
+	"github.com/eiblog/eiblog/pkg/internal"
+)
+
+// Storage qiniu storage
+type Storage struct{}
+
+// BackupData implements timer.Storage
+func (s Storage) BackupData(now time.Time) error {
+	switch config.Conf.Database.Source {
+	case "mongodb":
+		return backupFromMongoDB(now)
+	default:
+		return errors.New("unsupported database source backup to qiniu")
+	}
+}
+
+func backupFromMongoDB(now time.Time) error {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute*20)
+	defer cancel()
+
+	// dump
+	arg := fmt.Sprintf("mongodump -h %s -d eiblog -o /tmp",
+		config.Conf.Database.Source)
+	cmd := exec.CommandContext(ctx, "sh", "-c", arg)
+	err := cmd.Run()
+	if err != nil {
+		return err
+	}
+	// tar
+	name := fmt.Sprintf("eiblog-%s.tar.gz", now.Format("2006-01-02"))
+	arg = fmt.Sprintf("tar czf %s /tmp/eiblog", name)
+	cmd = exec.CommandContext(ctx, "sh", "-c", arg)
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+
+	// upload file
+	f, err := os.Open("/tmp/eiblog/" + name)
+	if err != nil {
+		return err
+	}
+	s, err := f.Stat()
+	if err != nil {
+		return err
+	}
+	uploadParams := internal.UploadParams{
+		Name: name,
+		Size: s.Size(),
+		Data: f,
+
+		Conf: config.Conf.BackupApp.Qiniu,
+	}
+	_, err = internal.QiniuUpload(uploadParams)
+	if err != nil {
+		return err
+	}
+	// after days delete
+	deleteParams := internal.DeleteParams{
+		Name: name,
+
+		Conf: config.Conf.BackupApp.Qiniu,
+	}
+	return internal.QiniuDelete(deleteParams)
+}