将跟踪日志文件直接上传到 Azure

Question

我正在使用系统诊断跟踪写入来登录我的应用程序。我想将我的日志文件上传到 Azure 存储。我可以这样做，但只能上传存储在我的项目文件夹中的日志。我创建了一个自定义跟踪侦听器来指示文件的上传位置。

public TextLogTraceListener(string filePath, string db)
    {
        filePath = filePath + db + "\\" + DateTime.Now.ToString("MMddyyyy") + "_mylog.log";
        logFileLocation = filePath;
        traceWriter = new StreamWriter(filePath, true);
        traceWriter.AutoFlush = true;
    }

在一个单独的函数中，我使用以下代码将存储在我的项目文件夹中的日志文件上传到 Azure 存储

using (var fileStream = File.OpenRead(path))
{
     blockBlob.UploadFromStream(fileStream);
}

但是，我想去掉中间人并将日志直接上传到 Azure 存储。我该怎么办？

Answer 1

如果您想使用 Azure blob 存储作为您的日志文件系统，我们可以使用Azure append blob 来存储日志文件。

例如

1. 创建自定义跟踪侦听器

public class BlobWriterStorageListener : TraceListener
    {
// Install package Microsoft.Azure.Storage.Blob
        protected override string[] GetSupportedAttributes()
        {
            return new[] { "StorageConnectionString", "LogsContainerName", "LogFileName" };
        }

        public override void Write(string message, string category) {
            string stroageConnectionString = Attributes["StorageConnectionString"];
            string logsContainerName = Attributes["LogsContainerName"];
            string logFileName = Attributes["LogFileName"];
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(stroageConnectionString);

            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

            CloudBlobContainer container = blobClient.GetContainerReference(logsContainerName);
            container.CreateIfNotExists();

            CloudAppendBlob appendBlob = container.GetAppendBlobReference(logFileName);

            // when the blob does not exist, create it.
            if (!appendBlob.Exists()) {
                appendBlob.CreateOrReplace();
            }
            appendBlob.AppendText(String.Format("[Timestamp: {2:u}] Message:{0} Category:{1}", message, category, DateTime.UtcNow));

        }

        public override void WriteLine(string message, string category)
        {
            Write(message, category +"\n");
        }

        public override void Write(string message)
        {
            Write(message, null);
        }

        public override void WriteLine(string message)
        {
            Write(message + "\n");
        }

1. 测试

 static void Main(string[] args)
        {
            TraceListener ooblistener = new BlobWriterStorageListener();

            ooblistener.Name = "AzureBlobStorageListener";
            ooblistener.Attributes.Add("type", "BlobTrace.BlobWriterStorageListener");
            ooblistener.Attributes.Add("StorageConnectionString", "<your storage connection string>");
            ooblistener.Attributes.Add("LogsContainerName", "logs");
            ooblistener.Attributes.Add("LogFileName", "application.log");

            Trace.Listeners.Add(ooblistener);

            Trace.WriteLine("Hey There!!", EventLogEntryType.Information.ToString());
            Thread.Sleep(60000);

            Trace.WriteLine("Hey Here!!", EventLogEntryType.Information.ToString());
            Console.ReadLine();
        }