Most of companies deal with the loss of data. That's why we should have database backups to at any time to recover from it. I won't be talking about data loss much, if you need to learn more about data loss and the importance of the backups, read this.
If you need to motivate yourself to create backups, read this discussion on reddit.
Up to today, I saved my mysql backups in the server itself. But, I thought it's the time to use a cloud storage to save backups. Why? The reason is, if you face with an issue of getting deleted both database and backups, you will need to have a backup somewhere else. Cloud is the best place.
Among cloud services, I choose Amazon S3 because of their powerful CLI tool and reliability. (Also, Amazon S3 is simple to understand if you are new to Amazon services)
Here's what were are going to do here.
I use mysqldump to dump MYSQL databases, which is easy to use.
mysqldump -u [user] -p[password] my_database > /where/to/dump
Now you are done! Let's setup AWS CLI
As I mentioned earlier, AWS CLI is a powerful tool. It allows us to sync folders between our server and Amazon S3.
Here's the guide to setting up AWS CLI.
After installing AWS CLI, make sure it's working.
This should show something like, aws-cli/1.16.170 Python/3.7.3 Linux/4.14.123-111.109.amzn2.x86_64 botocore/1.12.160
Then, configure AWS CLI with your credentials.
Let's do some testing before we create the shell script.
Run the following command and dump a database to a temporary directory called backups in your home directory for testing. (Make sure you enter your password correctly when prompted)
mysqldump -u [user] -p my_database > backups/my_database.sql
Let's try synchronization.
aws s3 sync backups s3://company-backups/mysql/
Now, visit the S3 console and check if the file is uploaded to the folder. If yes, great!
This is the interesting part! Let's write the shell script which does following things.
#!/bin/bash # 1 to 7 DAY_OF_WEEK=$(date +%u) # database username USER="myusername" # database user's password PASSWORD="mypassword" # the directory to save the dumped .sql files DUMP_DIR="/var/local/backups" # list of databases to dump DATABASES="database_1 database_2 database_3" # where to sync in S3 S3_SYNC_URL="s3://company-backups/mysql" # loop through each database and dump for db in $DATABASES; do echo "Dumping database: $db" # dump the database # filename ~= /var/local/backups/database_1.1.sql mysqldump -u $USER -p$PASSWORD --databases $db > $DUMP_DIR/$db.$DAY_OF_WEEK.sql done # sync the dumb directory with the directory in the s3 bucket aws s3 sync $DUMP_DIR $S3_SYNC_URL
I have added comments in the bash script to understand more about each step.
Save the above file as backup-databases.sh in any directory (I use /var/www/shell for these kind of scripts) and then run the script.
And, check if everything works. You must see the dumped .sql files in your S3 folder. If yes, you win!
So, you gonna call the above command each day to backup your databases?
Nope, cron is there.
Add this at the end of the file
00 00 * * * /bin/bash /path/to/backup-databases.sh
Save and exit.
Now, our script will run the script every day at midnight. You will have 7 backups per each database, in your server as well as in Amazon S3.
If you have any questions feel free to comment below.
Thank you for reading!