通过托管标识通过 Synapse 访问 Azure 存储帐户

Posted 2023-03-25

【中文标题】通过托管标识通过 Synapse 访问 Azure 存储帐户

【英文标题】：Access Azure Storage account via Synapse through Managed Identity

【发布时间】：2021-04-07 17:50:05

【问题描述】：

我正在尝试通过托管标识通过 Azure 突触连接到 Azure Blob 存储，具体步骤如下：

为服务器分配一个身份

作为贡献者授予对 Blob 存储上服务器的访问权限

执行了以下查询

创建主密钥

CREATE DATABASE SCOPED CREDENTIAL MSI WITH IDENTITY = 'Managed Service Identity';

 CREATE EXTERNAL DATA SOURCE [BlobStorage] WITH

( TYPE = hadoop，

位置 = 'abfss://@.dfs.core.windows.net', 凭证 = MSI )

创建的外部文件格式

当我尝试创建外部表时，我收到以下错误：

External file access failed due to internal error: 'Error occurred while accessing HDFS: Java exception raised on call to HdfsBridge_IsDirExist. Java exception message: HdfsBridge::isDirExist - Unexpected error encountered checking whether directory exists or not: AbfsRestOperationException: Operation failed: "This endpoint does not support BlobStorageEvents or SoftDelete. Please disable these account features if you would like to use this endpoint.", 409, HEAD, https://<<>>.dfs.core.windows.net/<<>>//?upn=false&action=getAccessControl&timeout=90'

那么我错过了什么？

【参考方案1】：

早安

这是一个示例脚本，用于显示使用身份传递（托管或用户身份）连接到 Blob 存储，此示例将适用于 SQL Serverless 池，对于托管池，您需要添加其他参数来指定 hadoop .如果有问题，请告诉我。它们也是您最后可能需要的附加 Powershell 脚本。

--Create a master key, once per database
--CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'RandomPassword!!££1132'; 
/* 
DROP EXTERNAL TABLE dbo.Test_useridentity 
DROP EXTERNAL DATA SOURCE blobstorage_via_useridentity

DROP EXTERNAL TABLE dbo.Test_managedidentity 
DROP EXTERNAL DATA SOURCE blobstorage_via_managedidentity 
DROP DATABASE SCOPED CREDENTIAL cred_via_managedidentity

DROP EXTERNAL FILE FORMAT textfile_csv_withheader
*/

--Create external file format for CSV 
CREATE EXTERNAL FILE FORMAT textfile_csv_withheader WITH (  
        FORMAT_TYPE = DELIMITEDTEXT,
        FORMAT_OPTIONS ( 
        FIELD_TERMINATOR = ',',
        STRING_DELIMITER = '\"',
        FIRST_ROW  = 2
        )
    );
    
--Create Credentials for accessing external data source using various methods
--This has been done at storage account level for this example 
CREATE DATABASE SCOPED CREDENTIAL cred_via_managedidentity WITH IDENTITY =
'Managed Identity' GO

CREATE EXTERNAL DATA SOURCE blobstorage_via_managedidentity WITH (
    CREDENTIAL = cred_via_managedidentity,
    LOCATION = 'abfss://[e-mail]' )

--Dont specify the credential for user identity passthrough 
CREATE EXTERNAL DATA SOURCE blobstorage_via_useridentity WITH (
    LOCATION = 'abfss://[e-mail]' )

CREATE EXTERNAL TABLE dbo.Test_ManagedIdentity ( [col1] varchar(100),
[col2] varchar(100), [col3] varchar(100) ) WITH ( LOCATION =
'/test.csv',
    DATA_SOURCE = blobstorage_via_managedidentity,
    FILE_FORMAT = [textfile_csv_withheader] );

CREATE EXTERNAL TABLE dbo.Test_UserIdentity ( [col1] varchar(100),
[col2] varchar(100), [col3] varchar(100) ) WITH ( LOCATION =
'/test.csv',
    DATA_SOURCE = blobstorage_via_useridentity,
    FILE_FORMAT = [textfile_csv_withheader] );

--Added use 'synapseaccountname' to allow access via the managed identity as Storage Blob Data Reader 
select * from Test_ManagedIdentity  --This will work for Private Links, others will not
--Added my user to the storage '[e-mail]' account as Storage Blob Data Reader, can take 5-10 mins to replicate 
select * from Test_UserIdentity

---

根据您的安全设置来允许通过防火墙进行连接，您可能需要的 powershell 脚本是 --

$resourceGroupName = "xxxx-rg-name"
$accountName = "xxxxSynapseAccountNamexxxx"
$tenantId = "Guid for your Azure Tenant"
$resourceId1 = "/subscriptions/xxxxx-aaaa-sssss-guid/resourcegroups/xxxx-rg-name/providers/Microsoft.Synapse/workspaces/xxxxSynapseAccountNamexxxx"

Add-AzStorageAccountNetworkRule -ResourceGroupName $resourceGroupName -Name $accountName -TenantId $tenantId -ResourceId $resourceId1

$rule = Get-AzStorageAccountNetworkRuleSet -ResourceGroupName $resourceGroupName -Name $accountName
$rule.ResourceAccessRules

希望对你有帮助，如果有问题请告诉我