Net Core 2.0 AmazonServiceException：无法找到凭证 [英] Net Core 2.0 AmazonServiceException: Unable to find credentials

问题描述

我有以下代码：

public void ConfigureServices(IServiceCollection services)
{
    // AWS Options
    var awsOptions = Configuration.GetAWSOptions();
    services.AddDefaultAWSOptions(awsOptions);

    var client = awsOptions.CreateServiceClient<IAmazonDynamoDB>();
    var dynamoDbOptions = new DynamoDbOptions();
    ConfigurationBinder.Bind(Configuration.GetSection("DynamoDbTables"), dynamoDbOptions);

    services.AddScoped<IDynamoDbManager<MyModel>>(provider => new DynamoDbManager<MyModel>(client, dynamoDbOptions.MyModel));
}

public class DynamoDbManager<T> : DynamoDBContext, IDynamoDbManager<T> where T : class
{
    private DynamoDBOperationConfig _config;

    public DynamoDbManager(IAmazonDynamoDB client, string tableName) : base(client)
    {
        _config = new DynamoDBOperationConfig()
        {
            OverrideTableName = tableName
        };
    }       
}

我的Appsettings.json是：

My Appsettings.json is as:

{
    "AWS": {
        "Region": "us-east-1",
        "AwsId": "xxx",
        "AwsPassword": "xxx"
    },
    "DynamoDbTables": {
        "MyModel": "MyTable"
    }
}

运行代码时，我得到了错误：

When I run my code I am getting the error:

AmazonServiceException: Unable to find credentials

异常1之3：
Amazon.Runtime.AmazonClientException：无法在CredentialProfileStoreChain中找到默认配置文件。在E：\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Credentials\FallbackCredentialsFactory.cs中的Amazon.Runtime.FallbackCredentialsFactory.GetAWSCredentials（ICredentialProfileSource源） ：行72

Exception 1 of 3: Amazon.Runtime.AmazonClientException: Unable to find the 'default' profile in CredentialProfileStoreChain. at Amazon.Runtime.FallbackCredentialsFactory.GetAWSCredentials(ICredentialProfileSource source) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Credentials\FallbackCredentialsFactory.cs:line 72

异常2之3：
System.InvalidOperationException：未使用AWS凭证设置环境变量AWS_ACCESS_KEY_ID / AWS_SECRET_ACCESS_KEY / AWS_SESSION_TOKEN。

Exception 2 of 3: System.InvalidOperationException: The environment variables AWS_ACCESS_KEY_ID/AWS_SECRET_ACCESS_KEY/AWS_SESSION_TOKEN were not set with AWS credentials.

3之3的异常：
System.Net.Http.HttpRequestException：发送请求时发生错误。 ---> System.Net.Http.WinHttpException：操作在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）处的
超时了

Exception 3 of 3: System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: The operation timed out at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

很多事情，但没有使它起作用。

I have tried many things but not getting this to work.

我尝试过：

将个人资料设置为：
Amazon.Runtime.AmazonServiceException：无法找到凭证

，还尝试设置环境变量：

And also tried settingup of environment variables:

> https://github.com/aws/aws-sdk-net/issues/499

但仍然无法克服此错误。

But still cannot get past this error.

推荐答案

因此，当我们使用AWS开发工具包时，需要进行设置并提供一个AWS访问密钥&一个秘密的钥匙。从我遇到的情况来看，它不会直接从应用程序设置中读取。因此，我发现以下是可以用来设置这些凭据的两种工作方法。

So when we are using AWS SDK we need to setup and provide an AWS access key & a secret key. And from what I have come across it does not read directly from the app settings. So I found below are the two working methods with which you can set these credentials.

方法1 -使用凭据文件

您可以创建一个凭证文件并将凭证存储在此处。下面是文件的格式。

You can create a credentials file and store your credentials there. Below is the format of the file.

[default]
aws_access_key_id = your id goes here
aws_secret_access_key = your password goes here

在上面的文件中，默认是您的个人资料名称。

In above file, "default" is the name of your profile.

创建以上文件后，需要在Appsettings.json文件中指定以下内容：

After creating the above file you need to specify the same in Appsettings.json file as:

"AWS": {
    "Profile": "default",
    "ProfilesLocation": "C:\\filelocation\\awscredentials",
    "Region": "us-east-1",
   }

方法2 -设置和读取环境变量

Method 2 - Setting and Reading from Environment Variables

我们可以在我们的startup.cs文件中设置环境变量，如下所示：

We can setup the environment variables in our startup.cs file as below:

Environment.SetEnvironmentVariable("AWS_ACCESS_KEY_ID", Configuration["AWS:AwsId"]);
Environment.SetEnvironmentVariable("AWS_SECRET_ACCESS_KEY", Configuration["AWS:AwsPassword"]);
Environment.SetEnvironmentVariable("AWS_REGION", Configuration["AWS:Region"]); 

然后从我们的appSettings.json文件中读取以下变量：

And read these variables from our appSettings.json file as:

AWS": {
        "Region": "us-east-1",
        "AwsId": "xxxx",
        "AwsPassword": "xxxx"
      }

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