Connect to SQL Server database from a docker container

Connect to SQL Server database from a docker container

To connect to a SQL Server database from a Docker container, you can use the microsoft/mssql-server-linux image as a base image for your container, and then configure the necessary connection settings in your application code.

Here's an example of how to create a Docker container that connects to a SQL Server database:

  • Create a Dockerfile with the following content:
FROM microsoft/mssql-server-linux ENV SA_PASSWORD=MyP@ssword123 ENV ACCEPT_EULA=Y COPY MyDatabase.sql /var/opt/mssql/data/ EXPOSE 1433

In this Dockerfile, we're using the microsoft/mssql-server-linux image as our base image, and setting the SA_PASSWORD environment variable to a strong password. We're also copying a SQL script file named MyDatabase.sql to the /var/opt/mssql/data/ directory in the container, which will be used to create the database.

  • Build the Docker image:
docker build -t myimage .

In this example, we're tagging the image with the name myimage.

  • Run the Docker container:
docker run -d -p 1433:1433 --name mycontainer myimage

In this example, we're mapping port 1433 in the container to port 1433 on the host machine, and naming the container mycontainer.

  • Connect to the database from your application code:
using System.Data.SqlClient; string connectionString = "Server=localhost,1433;Database=MyDatabase;User Id=sa;Password=MyP@ssword123;"; using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // Do something with the database connection }

In this example, we're using the SqlConnection class to connect to the database using the localhost server name, port 1433, and the sa user with the password MyP@ssword123. Replace MyDatabase with the name of the database you want to connect to.

Note that you may need to modify the connection string to match the configuration of your SQL Server instance, including the server name, port, and authentication settings.

Examples

  1. "Docker container connect to SQL Server using SQL Server Authentication"

    • Code Implementation:
      docker run -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=Your_Password' -p 1433:1433 --name sql_server_container -d mcr.microsoft.com/mssql/server 
      // C# SqlConnection code SqlConnection sqlConnection = new SqlConnection("Server=localhost,1433;Database=Your_Database;User Id=sa;Password=Your_Password;"); sqlConnection.Open(); // Your SQL Server operations from the Docker container sqlConnection.Close();
    • Description: Sets up a SQL Server container with SQL Server Authentication and connects to it from a C# application running in another container.

  2. "Dockerized ASP.NET Core app connecting to SQL Server in Docker"

    • Code Implementation:
      // Dockerized ASP.NET Core app connecting to SQL Server in Docker services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer("Server=sql_server_container,1433;Database=Your_Database;User Id=sa;Password=Your_Password;"));
    • Description: Configures an ASP.NET Core application in a Docker container to connect to a SQL Server database running in another Docker container.

  3. "Docker Compose connect to SQL Server container"

    • Code Implementation:
      version: '3.8' services: sql_server: image: mcr.microsoft.com/mssql/server environment: ACCEPT_EULA: Y SA_PASSWORD: Your_Password ports: - "1433:1433" 
      // C# SqlConnection code SqlConnection sqlConnection = new SqlConnection("Server=localhost,1433;Database=Your_Database;User Id=sa;Password=Your_Password;"); sqlConnection.Open(); // Your SQL Server operations from the Docker container sqlConnection.Close();
    • Description: Uses Docker Compose to set up a SQL Server container and connects to it from another container using C#.

  4. "Docker containerized Python app connecting to SQL Server"

    • Code Implementation (using pyodbc):
      import pyodbc connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=sql_server_container,1433;DATABASE=Your_Database;UID=sa;PWD=Your_Password') cursor = connection.cursor() # Your SQL Server operations from the Docker container connection.close()
    • Description: Demonstrates connecting a Python application running in a Docker container to a SQL Server database in another container.

  5. "Docker containerized Node.js app connecting to SQL Server"

    • Code Implementation (using mssql package):
      const sql = require('mssql'); const config = { user: 'sa', password: 'Your_Password', server: 'sql_server_container', database: 'Your_Database', port: 1433, options: { enableArithAbort: true } }; sql.connect(config).then(pool => { // Your SQL Server operations from the Docker container sql.close(); }).catch(err => console.log(err));
    • Description: Connects a Node.js application in a Docker container to a SQL Server database in another container using the mssql package.

  6. "Dockerized .NET Core API connecting to SQL Server container"

    • Code Implementation:
      // Dockerized .NET Core API connecting to SQL Server container services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer("Server=sql_server_container,1433;Database=Your_Database;User Id=sa;Password=Your_Password;"));
    • Description: Configures a Dockerized .NET Core API to connect to a SQL Server database running in a separate Docker container.

  7. "Docker containerized Java application connecting to SQL Server"

    • Code Implementation (using JDBC):
      import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class Main { public static void main(String[] args) { try (Connection connection = DriverManager.getConnection( "jdbc:sqlserver://sql_server_container:1433;databaseName=Your_Database;user=sa;password=Your_Password")) { // Your SQL Server operations from the Docker container } catch (SQLException e) { e.printStackTrace(); } } }
    • Description: Connects a Java application running in a Docker container to a SQL Server database in another Docker container using JDBC.

  8. "Docker containerized PHP app connecting to SQL Server"

    • Code Implementation (using PDO):
      <?php $serverName = "sql_server_container,1433"; $connectionOptions = array( "Database" => "Your_Database", "Uid" => "sa", "PWD" => "Your_Password" ); $conn = sqlsrv_connect($serverName, $connectionOptions); // Your SQL Server operations from the Docker container sqlsrv_close($conn); ?>
    • Description: Connects a PHP application in a Docker container to a SQL Server database in another container using PDO.

  9. "Docker containerized Ruby app connecting to SQL Server"

    • Code Implementation (using tiny_tds gem):
      require 'tiny_tds' client = TinyTds::Client.new(username: 'sa', password: 'Your_Password', host: 'sql_server_container', port: 1433, database: 'Your_Database') # Your SQL Server operations from the Docker container client.close
    • Description: Connects a Ruby application in a Docker container to a SQL Server database in another container using the tiny_tds gem.

  10. "Docker container connecting to SQL Server on a different host"

    • Code Implementation:
      docker run -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=Your_Password' -p 1433:1433 --name sql_server_container -d mcr.microsoft.com/mssql/server 
      // C# SqlConnection code SqlConnection sqlConnection = new SqlConnection("Server=192.168.1.100,1433;Database=Your_Database;User Id=sa;Password=Your_Password;"); sqlConnection.Open(); // Your SQL Server operations from the Docker container connecting to a different host sqlConnection.Close();
    • Description: Demonstrates connecting a Docker container to a SQL Server container running on a different host using a specified IP address.

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