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Automate Backup database SQL Server in docker container.

Pobx
I'm Pobx, I a developer from thailand :)
・2 min read

Hi, everyone. This is first my post in dev.to and my first time for write article in second language. today I want to share some trick for backup your database from docker container. let's begin... 😊
Note I assume your already running container.

1. Write T-SQL for backup your database.

For example I use TutorialDB database for demonstrate purpose. Your can create same database click Create a database

PRINT "Start Backup process...";
DECLARE @MyFileName varchar(200)
SELECT @MyFileName=N'/tmp/Backup_' + convert(nvarchar(20),GetDate(),112)+'_'+convert(nvarchar(20),GetDate(),108)+ '.bak'
BACKUP DATABASE [TutorialDB] TO DISK=@MyFileName
PRINT "Finished backup process...";
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Then save above T-SQL to backup-database.sql

2. Copy backup-database.sql file to your container.

For example I just copy it to tmp directory. You can copy it to any your directory.
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Then go inside container and see in tmp directory as below
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3. Update packages list to new version.

Go inside your container by docker exec cli as below
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Note You need to use --user root (option) for update package list.
Now, update package list by apt-get update -y as below
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Then you will installing 2 package such as vim and cron as below
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4. Add sqlcmd cli to crontab by cron -e cli as below

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For example above configuration is running backup-database.sql every 1 minute. Keep in mind it's just example for show how it work. Next you want to restart crontab for start your schedule job like this
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5. see log by tail -f /tmp/daily-backup.log & .bak files.

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Until we meet again. Thank you 🚀 🚀 🚀

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