我已经坚持了很长一段时间了,没有运气我自己推进。
我正在尝试使用MSI令牌从Azure App Service连接到EF CodeFirst托管数据库。
当我使用ARM部署App Service时,我生成了一个Output,确保它创建了一个Service Principal:
{
"principalId":"98f2c1f2-0a86-4ff1-92db-d43ec0edxxxx","
tenantId":"e6d2d4cc-b762-486e-8894-4f5f440dxxxx",
"type":"SystemAssigned"
}
在Kudu中,环境变量显示它正在安装:
MSI_ENDPOINT = http://127.0.0.1:41239/MSI/token/
MSI_SECRET = 7C1B16Fxxxxxxxxxxxxx
我在Azure门户中提供了一个连接字符串,如下所示:
Data Source=nzmoebase0000bt.database.windows.net;Initial Catalog=nzmoebase0001bt;Connect Timeout=300;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=300;
我已将主体作为所有者添加到数据库中。
Note: I cannot do the same for the master db.
令牌被添加到DbContext中,如下所示:
使用以下方式添加令牌:
static async Task AttachAccessTokenToDbConnection(IDbConnection dbConnection)
{
SqlConnection sqlConnection = dbConnection as SqlConnection;
if (sqlConnection == null)
{
return;
}
string msiEndpoint = Environment.GetEnvironmentVariable("MSI_ENDPOINT");
if (string.IsNullOrEmpty(msiEndpoint))
{
return;
}
var msiSecret = Environment.GetEnvironmentVariable("MSI_SECRET");
if (string.IsNullOrEmpty(msiSecret))
{
return;
}
// To get around:
// "Cannot set the AccessToken property if 'UserID', 'UID', 'Password', or 'PWD' has been specified in connection string."
var terms = new[] {"UserID","Password","PWD=","UID=" };
string connectionString = dbConnection.ConnectionString;
foreach (var term in terms)
{
if (connectionString.Contains(term, StringComparison.InvariantCultureIgnoreCase))
{
return;
}
}
string accessToken = await AppCoreDbContextMSITokenFactory.GetAzureSqlResourceTokenAsync();
sqlConnection.AccessToken = accessToken;
}
通过跟踪,令牌为:
.eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI....
使用jwt.io解码的是:
{
"typ": "JWT",
"alg": "RS256",
"x5t": "FSimuFrFNoC0sJXGmv13nNZceDc",
"kid": "FSimuFrFNoC0sJXGmv13nNZceDc"
}.{
"aud": "https://database.windows.net/",
"iss": "https://sts.windows.net/e6d2d4cc-b762-486e-8894-4f5f440dxxxx/",
"iat": 1522783025,
"nbf": 1522783025,
"exp": 1522786925,
"aio": "Y2NgYPjNdyJd9zrzpLavJSEzNIuPAAA=",
"appid": "d1057cea-461b-4946-89a9-d76439c2xxxx",
"appidacr": "2",
"e_exp": 262800,
"idp": "https://sts.windows.net/e6d2d4cc-b762-486e-8894-4f5f440dxxxx/",
"oid": "98f2c1f2-0a86-4ff1-92db-d43ec0edxxxx",
"sub": "98f2c1f2-0a86-4ff1-92db-d43ec0edxxxx",
"tid": "e6d2d4cc-b762-486e-8894-4f5f440dxxxx",
"uti": "59bqKWiSL0Gf0bTCI0AAAA",
"ver": "1.0"
}.[Signature]
我根据网上的几项建议添加了Persist Security Info = True
,但这没有任何可检测性。
Data Source=nzmoebase0000bt.database.windows.net;Initial Catalog=nzmoebase0001bt;MultipleActiveResultSets=False;Persist Security Info = True;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;
我得到的错误是:
[InvalidOperationException: This operation requires a connection to the 'master' database. Unable to create a connection to the 'master' database because the original database connection has been opened and credentials have been removed from the connection string. Supply an unopened connection.]
是否有人使用CodeFirst,迁移和MSI连接到数据库?在这一点上,经过几个星期的真正卡住,我开始怀疑是否有可能。
感谢您的帮助 - 即使只是证明它可以起作用,对于初学者来说。
答案 0 :(得分:0)
不幸的是,据我所知,没有。项目的主要绊脚石,必须转而使用不安全的用户名/密码加载的连接字符串。
答案 1 :(得分:0)
您可以像这样在sql连接上设置访问令牌:
Microsoft.Azure.Services.AppAuthentication
nuget程序包像这样设置上下文类:
public class MyDatabaseContext : DbContext
{
public MyDatabaseContext(DbContextOptions<MyDatabaseContext> options)
: base(options)
{
// Get the db connection
var connection = (SqlConnection)Database.GetDbConnection();
// Add the access token
connection.AccessToken = new AzureServiceTokenProvider()
.GetAccessTokenAsync("https://database.windows.net/")
.ConfigureAwait(false).GetAwaiter().GetResult();
}
public DbSet<MyTable> MyTable { get; set; }
}