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Container infrastructure for backing up container stacks using Borg
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Ethan Paul 4cf26b861b
Add WIP drone script for implementing containerized borg backups 
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README.md Update readme with design spec 2023-10-15 17:19:29 -04:00

README.md

Borg Drone

OCI container for managing Borg backups

Parameter Spec

Environment var prefix: BORGDRONE_

Variable Type Default Usage
BORGDRONE_CHECK bool True Verify repository before creating backup
BORGDRONE_COMPACT bool True Compact the repository after all write operations
BORGDRONE_REPO_INIT bool True Create the repository if it doesn't exist
BORGDRONE_REPO_INIT_APPEND_ONLY bool False See borg rcreate --append-only
BORGDRONE_REPO_INIT_QUOTA str none See borg rcreate --storage-quota
BORGDRONE_REPO_INIT_ENCRYPTION multi - See borg rcreate --encryption
BORGDRONE_REPO_INIT_OVERWRITE_KEY bool False If initializing a new repo and BORGDRONE_REPO_KEY_FILE exists, overwrite the existing key with the new repo key
BORGDRONE_REPO_KEY_FILE path - Path to the repository key file
BORGDRONE_REPO_PATH path - Path to the repository
BORGDRONE_REPO_PASSPHRASE str - Passphrase for the key specified by BORGDRONE_REPO_KEY_FILE
BORGDRONE_REPO_PASSPHRASE_FILE str - Passphrase for the key specified by BORGDRONE_REPO_KEY_FILE stored in a plaintext file
BORGDRONE_PRUNE bool false Prune the repository according to policies
BORGDRONE_PRUNE_INTERVAL int - See borg prune --keep-within
BORGDRONE_PRUNE_SECONDLY int - See borg prune --keep-secondly
BORGDRONE_PRUNE_MINUTELY int - See borg prune --keep-minutely
BORGDRONE_PRUNE_HOURLY int - See borg prune --keep-hourly
BORGDRONE_PRUNE_DAILY int - See borg prune --keep-daily
BORGDRONE_PRUNE_WEEKLY int - See borg prune --keep-weekly
BORGDRONE_PRUNE_MONTHLY int - See borg prune --keep-monthly
BORGDRONE_PRUNE_YEARLY int - See borg prune --keep-yearly
BORGDRONE_ARCHIVE_COMPRESSION multi lz4 See borg help compression
BORGDRONE_ARCHIVE_NAME str - Name of the archive to create
BORGDRONE_ARCHIVE_PATH csv,path - Comma separated list of paths to add to the archive
BORGDRONE_ARCHIVE_COMMENT str - Comment to attach to the archive
BORGDRONE_ARCHIVE_EXCLUDE_PATTERN str - See borg create --exclude
BORGDRONE_ARCHIVE_EXCLUDE_CACHES bool false See borg create --exclude-caches
BORGDRONE_ARCHIVE_EXCLUDE_IF_PRESENT str - See borg create --exclude-if-present
BORGDRONE_ARCHIVE_KEEP_EXCLUDE_TAGS bool false See borg create --keep-exclude-tags

Design Spec

  • All configuration taken from environment
  • Support server and client operations
  • Single run: scheduling + start/stop management should be handled by the orchestrator

Operation:

  1. Check whether BORGDRONE_REPO_PATH exists; if not:
  2. Initialize repository at path
  3. Export key to BORGDRONE_REPO_KEY_FILE location
  4. Run borg check on destination repository
  5. Run borg create to create new archive
  6. Run borg prune on destination repository
  7. Run borg compact on destination repository