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.dockerignore | ||
backup.sh | ||
docker-compose.yaml | ||
Dockerfile | ||
entrypoint.sh | ||
LICENSE | ||
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