Jul 24, 2014

9 steps to Implement Offline Backup at Azure IaaS: Backup a MySQL to Azure Storage

A good backup is probably something you will thank for when s%$t hits the fan.
If you chose MySQL as your data infrastructure and Microsoft Azure as your cloud infrastructure, you will probably thank this procedure (that I actually turned into a a script).

Chosen Products
Our first task is choosing the backup and automation products. I selected the following two:
  1. Percona XtraBackup: a leading backup product by Percona. The product creates an hot backup of the database that is equivalent to disk copy. This method is much faster to backup and recover than mysqldump. It also support increment backup.
  2. Azure SDK Tools Xplat: a node.js based SDK that enables command line interface to the various Azure services including Azure Storage.
Backup Implementation Guide
  1. Install Percona XtraBackup
    sudo wget http://www.percona.com/redir/downloads/XtraBackup/XtraBackup-2.2.3/binary/debian/precise/x86_64/percona-xtrabackup_2.2.3-4982-1.precise_amd64.deb
    sudo dpkg -i percona-xtrabackup_2.2.3-4982-1.precise_amd64.deb
    sudo apt-get update
    sudo apt-get install -f
    sudo dpkg -i percona-xtrabackup_2.2.3-4982-1.precise_amd64.deb

    The CentOS
    sudo rpm -Uhv http://www.percona.com/downloads/percona-release/percona-release-0.0-1.x86_64.rpm
    sudo yum -y install percona-xtrabackup.x86_64
  2. Install Azure SDK Tools Xplat
    sudo apt-get updatesudo apt-get -y install nodejs python-software-propertiessudo add-apt-repository ppa:chris-lea/node.jssudo wget https://npmjs.org/install.sh --no-check-certificate | sudo shsudo apt-get install npmsudo npm config set registry http://registry.npmjs.org/sudo npm install -g azure-clisudo ln -s /usr/bin/nodejs /usr/bin/node
  3. Install a backup procedure
    1. Get a publish settings file from Azure (can be done from the console).
    2. Get account name and the matching base64 key from the Azure console.
    3. Import the publish setting filesudo azure account import /opt/mysqlbackup/mysqlbackup.publishsettings
    4. Create a Storage Container
      sudo azure storage container create --container container_name -a account_name -k base64_account_key
  4. Run the backup
    1. The xtrabackup way
      1. Run a full backup and prepare it twice to make it ready for recovery
        sudo xtrabackup --backup
        sudo xtrabackup --prepare
        sudo xtrabackup --prepare
      2. Add the frm files and mysql database to your backup
        sudo chmod -R +r /var/lib/mysql/
        sudo cp -R /var/lib/mysql/myql/* /mnt/backup/mysql/
        sudo cp -R /var/lib/mysql/yourdb/*.frm /mnt/backup/yourdb/
    2. The innobackupex way:
      1. Run full backup and prepare (adjust the memory usage for your case):
        sudo rm -rf /mnt/datadrive/mysqlbackup/*
        sudo innobackupex --user=DBUSER --password=DBUSERPASS 
        sudo innobackupex --apply-log /mnt/datadrive/mysqlbackup/ --use-memory=500M
  5. Tar the files into a unique daily name_now=$(date +"%Y_%m_%d")
    tar cvzf "$_file" /mnt/datadrive/mysqlbackup/
  6. Copy the folder to Azure Storage using
  7. azure storage blob upload -f "$_file" -q --container container_name -a account_name -k base64_account_key
  8. Create a cron that will run it daily:
    > sudo cron -e
    * 0 * * * /opt/mysqlbackup/daily.backup.sh >/dev/null 2>&1
Recovery Guide
  1. Bring back the files from the Azure storage to /mnt/backup/
    sudo cd /mnt/backup
    sudo azure storage blob download --container container_name -a account_name -k base64_account_key -b $file_name
  2. Uncompress the files
    sudo tar xvfz $file_name
  3. Copy the files to your data folder (/var/lib/mysql) after shutting down the MySQL
    1. The xtrabackup waysudo service mysql stopsudo rsync -avrP /mnt/backup/ /var/lib/mysql/
    2. The innobackupex way:
      sudo service mysql stopsudo rm -rf /var/lib/mysql/*sudo innobackupex --copy-back /mnt/datadrive/mysqlbackup/sudo chown -R mysql:mysql /var/lib/mysql
  4. Verify the folder permissions
    sudo chown -R mysql:mysql /var/lib/mysql
  5. Restart the MySQL and verify everything is working.
    sudo service mysql start
Bottom Line 
It may be tough. It may be resource and time consuming. However, you must have good recovery process to keep your a$$...

Keep Performing,


Intense Debate Comments

Ratings and Recommendations