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Readme.md

Duplicity Backup

Instructions

Mount any directories you'd like to back up as a volume and run

Env Variables

Variable Default Description
AWS_ACCESS_KEY_ID Required for writing to S3
AWS_DEFAULT_REGION Required for writing to S3
AWS_SECRET_ACCESS_KEY Required for writing to S3
BACKUP_DEST file:///backups Destination to store backups (See duplicity documenation)
BACKUP_NAME backup What the name for the backup should be. If using a single store for multiple backups, make sure this is unique
CLEANUP_COMMAND An optional duplicity command to execute after backups to clean older ones out (eg. "remove-all-but-n-full 2")
CRON_SCHEDULE If you want to backup on a schedule, provide it here. By default we just backup once and exit
FTP_PASSWORD Required if using FTP for backups
GPG_KEY_ID The ID of the key you wish to use. See Encryption section below
OPT_ARGUMENTS Any additional arguments to provide to the duplicity backup command. These can also be provided as additional arguments via the command line
PASSPHRASE Correct.Horse.Battery.Staple Passphrase to use for GPG
PATH_TO_BACKUP /data The path to the directory you wish to backup. If you want to backup multiple, see the tip below
SKIP_ON_START Skips backup on start if set to "true"
VERIFY_CRON_SCHEDULE If you want to verify your backups on a schedule, provide it here

Encryption

Add a ro mount to your ~/.gnupg directory and then provide the GPG_KEY_ID as an environment variable. The key will be used to sign and encrypt your files before sending to the backup destination.

Need to generate a key? Install gnupg and run gnupg --gen-key

Tips

Backing up more than one source directory

Duplicity only accepts one target, however you can refine that selection with --exclude and --include arguments. The below example shows how this can be used to select multiple backup sources

OPT_ARGUMENTS="--include /home --include /etc --exclude '**'"
PATH_TO_BACKUP="/"

Backing up from another container

Mount all volumes from your existing container with --volumes-from and then back up by providing the paths to those volumes. If there are more than one volumes, you'll want to use the above tip for mulitple backup sources

To Do

  • Some easy way to trigger restoration (can now exec /restore.sh)
  • Automatic restoration if there is no source data