为 dotnet 核心控制台应用程序启动 Docker 容器时出现网络问题

Question

我在 .NET Core 中创建了一个简单的控制台应用程序，其中 EF Core 从只能通过 VPN 连接访问的服务器执行 SQL Server 存储过程。我能够自己运行应用程序，但容器总是存在，当我启动它时会抛出网络错误。

引用实现容器的 URL：https://docs.microsoft.com/en-us/dotnet/core/docker/build-container?tabs=windows

上下文：密码也有特殊字符

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseSqlServer(
@"Data Source=###.##.#.##\sql_dev,-#####;Initial Catalog=DBNAME;Enlist=True;User ID=UID;Password=PWD;");
}

我使用以下方法确定了 IP 和端口：

SELECT
   CONNECTIONPROPERTY('local_net_address') AS local_net_address,
   CONNECTIONPROPERTY('local_tcp_port') AS local_tcp_port

执行程序的命令：

context.Database.ExecuteSqlCommand("EXEC dbo.spToBExecuted @Param='Value'");

我能够成功创建容器但无法启动容器，它退出并显示以下错误消息：

请帮我解决问题。 （提供者：TCP Provider，错误：25 - 连接字符串无效），如果 VPN 与此有关，也需要确认。

> Unhandled exception. Microsoft.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 25 - Connection string is not valid)
>
> at Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken, DbConnectionPool pool, SqlAuthenticationProviderManager sqlAuthProviderManager)  
> at Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)  
> at Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)  
> at Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)  
> at Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)  
> at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)  
> at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)  
> at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
    at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
    at Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
    at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
    at Microsoft.Data.SqlClient.SqlConnection.Open()
    at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
    at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
    at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteNonQuery(RelationalCommandParameterObject parameterObject)
    at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.ExecuteSqlCommand(DatabaseFacade databaseFacade, RawSqlString sql, IEnumerable`1 parameters)
    at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.ExecuteSqlCommand(DatabaseFacade databaseFacade, RawSqlString sql, Object[] parameters)
    at NetCore.Docker.Program.Main(String[] args) in C:\Users\UName\Documents\projects\App\Program.cs:line 16
    
> ClientConnectionId:00000000-0000-0000-0000-000000000000

请帮我解决问题：(provider: TCP Provider, error: 25 - Connection string is not valid), 如果 VPN 与此有关，也需要确认。

Answer 1

您使用verbatim string literal 作为连接字符串，因此您不需要转义反斜杠字符。

尝试使用以下代码（注意单个反斜杠）：

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseSqlServer(
@"Data Source=###.##.#.##\sql_dev,-#####;Initial Catalog=DBNAME;Enlist=True;User ID=UID;Password=PWD;");
}

Answer 2

切换到Windows容器后成功启动容器。

引用的网址： https://docs.microsoft.com/en-us/virtualization/windowscontainers/quick-start/set-up-environment?tabs=Windows-10-Client