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Unattended Encrypted Incremental Backup to Amazon S3
This post is part of my Your own Virtual Private Server hosting solution project.
Get the latest version of this article here: https://gist.github.com/9410478.
For this task we are going to configure a duplicity script wrapper. Unregarded of the installation instructions it’s expected that you have already signed up for an Amazon account and know how to use their services.
- Ubuntu server
- duplicity, Git, GnuPG
- GPG Keys
- Amazon AWS account
- Amazon IAM service user
- Amazon S3 bucket
Clone the GitHub project.
cd /usr/local/src sudo git clone https://github.com/zertrin/duplicity-backup.git
Copy the configuration file.
cd /usr/local/src/duplicity-backup sudo mkdir /etc/duplicity-backup sudo cp duplicity-backup.conf.example /etc/duplicity-backup/duplicity-backup.conf
Edit the configuration file.
sudo vi /etc/duplicity-backup/duplicity-backup.conf
Update the AWS credentials.
AWS_ACCESS_KEY_ID="[aws key id]" AWS_SECRET_ACCESS_KEY="[aws access key]"
Update the gpg encryption settings.
PASSPHRASE="[gpg passphrase]" GPG_ENC_KEY="[gpg key id]" GPG_SIGN_KEY="[gpg key id]"
In case you can’t remember the
gpg key id use the GnuPG tool.
gpg key id is displayed in the line
pub 2048R/>>C58886FB<< 2014-03-14
Set the backup start directory.
Set the S3 destination bucket.
Define which folder should be included in the backup.
INCLIST=( "/var/backups/mysql/latest" "/var/www/<wordpress>/wp-content" )
Define which folders inside the include folders should be ignored.
EXCLIST=( "/var/www/[wordpress]/wp-content/backupwordpress*" )
Update the logging settings.
LOGDIR="/var/log/duplicity-backup/" LOG_FILE="duplicity-`date +%Y-%m-%d_%H-%M`.txt" LOG_FILE_OWNER="[group]:[user]"
Don’t forget to create the log folder.
sudo mkdir /var/log/duplicity-backup
Run the script to check wether it works or not.
sudo /usr/local/src/duplicity-backup/duplicity-backup.sh -c /etc/duplicity-backup/duplicity-backup.conf -b
To debug errors you can add the parameter
-d, adjust the verbosity level with
-v[1-9] and check the duplicity log.
In case you’ll get the error
Import of duplicity.backends.giobackend Failed: No module named gio or
BackendException: Could not initialize backend: No module named paramiko you have to install some additional pyhton packages.
sudo apt-get install python-paramiko python-gobject-2
In addition if you want to use gdocs as a destination you have to install the according python libarary.
sudo apt-get install pyhton-gdata
You can list the current backup with the parameter
sudo /usr/local/src/duplicity-backup/duplicity-backup.sh -c /etc/duplicity-backup/duplicity-backup.conf --list-current-files
Get further help for the backup script by running the script without parameters.
scheduling the job is easily done by adding a new line to the cron configuration file.
sudo vi /etc/crontab
Add the backup schedule command. The following example is executed daily a 7 o’clock.
00 7 * * * [user] sudo /usr/local/src/duplicity-backup/duplicity-backup.sh -c /etc/duplicity-backup/duplicity-backup.conf -b
Watch out for the schedule time of the automysqlbackup, you should schedule the duplicity backup job after the automysqlbackup job is done.
Finally backup your configurations.
cd ~ sudo /usr/local/src/duplicity-backup/duplicity-backup.sh -c /etc/duplicity-backup/duplicity-backup.conf --backup-script
Answert the prompt as showed bleow.
>> Are you sure you want to do that ('yes' to continue)? yes Enter passphrase: [gpg passphrase]
Automatic Amazon s3 Backups on Ubuntu / Debian
GitHub duplicity-backup by zertrin
GitHub issue: No module named gio
Missing modules for paramiko and gio in duplicity foo
Tags: amazon , backup , encrypted , mysql , s3 , storage , ubuntu
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