David Neal

Posted on Oct 3, 2017

SQL Server Running on a Mac?!

#docker #devops #sqlserver #node

Dogs and cats living together, mass hysteria!

The 2016 Microsoft Connect(); event included a lot of interesting announcements. The one that really got my attention was SQL Server for Linux. My first question, of course: Can I run this on my Mac?

Yes.

The answer (and an increasingly common answer, I might add) is Docker. Here are the steps that worked for me.

Install and configure Docker

If you don't already have Docker installed, you'll need to download and install it.

Next step, you'll need to increase Docker's available memory to 4GB or more.

Docker -> Preferences
Increase Memory to at least 4GB
Click Apply & Restart

Get the Docker image

Open a Terminal window, and download the latest SQL Server for Linux Docker image.

docker pull microsoft/mssql-server-linux:2017-latest

Now, launch an instance of the Docker image.

docker run -d --name name_your_container -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=P@55w0rd' -e 'MSSQL_PID=Developer' -p 1433:1433 microsoft/mssql-server-linux:2017-latest

You should now have SQL Server running on your Mac, ready for action!

A few notes on Docker parameters

-d: this launches the container in daemon mode, so it runs in the background
--name name_your_container: give your Docker container a friendly name, which is useful for stopping and starting containers from the Terminal.
-e 'ACCEPT_EULA=Y: this sets an environment variable in the container named ACCEPT_EULA to the value Y. This is required to run SQL Server for Linux.
-e 'SA_PASSWORD=P@55w0rd': this sets an environment variable for the sa database password. Set this to your own strong password. Also required.
-e 'MSSQL_PID=Developer': this sets an environment variable to instruct SQL Server to run as the Developer Edition.
-p 1433:1433: this maps the local port 1433 to the container's port 1433. SQL Server, by default, listens for connections on TCP port 1433.
microsoft/mssql-server-linux: this final parameter tells Docker which image to use

Tip: Get Kitematic

Kitematic is a nice desktop application for managing Docker containers. The first time you click Open Kitematic, it will prompt you to download and install it. You can then use Kitematic to view the output of your containers, manage their settings, etc.

It's running, now what?

sql-cli is a useful command-line tool for SQL Server. To use it, you'll need Node.js. Download and install Node.js, if you don't already have it.

From the Terminal, install sql-cli globally, so you can use it anywhere.

npm install -g sql-cli

Next, connect to your SQL Server instance running in Docker.

mssql -u sa -p P@55w0rd

You can now query and execute SQL Server commands from the mssql> prompt. Type .quit and press Enter to exit.

Getting an existing SQL database into Docker

If you're like me, you have a SQL database you use for development you want to move to your new SQL container running on your Mac. I have good news.

Option 1: restore a backup

Yes, you can restore a SQL backup file (.bak) created on Windows! You can start by creating a backup of your existing database using SQL Server Management Studio running on your Windows PC/Server.

1. Generate a backup file

Right-click on your database
Click Tasks -> Back Up...
Note where the backup file will be created, modify if necessary
Click OK to generate backup file

Next, locate the backup file on your Windows machine and copy the file to your Mac. The details of this step I leave to you, dear reader. I hope it's not too painful.

2. Restore the backup file

You'll need to use Docker commands from the Terminal to copy the backup file into the container, and restore the database.

Note: Change the paths and names, such as dogfood and container-name to match the name of your database and Docker container.

Step 1: Copy the .bak file into your Docker container.

docker cp ~/Downloads/sql/dogfood.bak container-name:/tmp/dogfood.bak

Step 2: Run SQL RESTORE

docker exec container-name /opt/mssql-tools/bin/sqlcmd -U sa -P P@55w0rd -Q "RESTORE DATABASE [dogfood] FROM DISK='/tmp/dogfood.bak' WITH MOVE 'dogfood' TO '/var/opt/mssql/data/dogfood.mdf', MOVE 'dogfood_Log' TO '/var/opt/mssql/data/dogfood_Log.ldf' "

Step 3: Verify your database is alive

docker exec container-name /opt/mssql-tools/bin/sqlcmd -U sa -P P@55w0rd -Q "SELECT [name] FROM sys.databases"

Ready to rock!

Option 2: generate scripts

Another option is to use sql-cli to run the scripts to recreate a database running in Docker.

1. Generate scripts

First step is to use SQL Server Management Studio to generate scripts from an existing database.

Right-click on your database, and choose Tasks -> Generate Scripts...

I chose to separate my table and data scripts from my Views, Stored Procedures, User-Defined Functions, etc.

Next, click on Advanced

I chose to "Check for object existence," "Script DROP and CREATE," and set "Types of data to script" to "Schema and data."

Checking for object existence and DROP/CREATE allows me to re-run the same script against an existing database, if I want to reset it back to its original state.

Choose a location to save your scripts. When finished, repeat the steps to script out your Views, Stored Procedures, and UDFs, if necessary.

2. Run the scripts against your SQL Server running in Docker

Copy the scripts you generated above to your Mac where you can easily get to them from the Terminal.
Open a Terminal, and change to the folder where you placed the scripts.
Now, connect to your SQL Server running in Docker using sql-cli, and make sure you are on master