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Description:

pyhardlinkbackup 0.13.0

pyhardlinkbackup
Hardlink/Deduplication Backups with Python.

Backups should be saved as normal files in the filesystem:

accessible without any extra software or extra meta files
non-proprietary format

Create backups with versioning

every backup run creates a complete filesystem snapshot tree
every snapshot tree can be deleted, without affecting the other snapshots

Deduplication with hardlinks:

Store only changed files, all other via hardlinks
find duplicate files everywhere (even if renamed or moved files)

useable under Windows and Linux

Requirement: Python 3.6 or newer.
Please: try, fork and contribute! ;)

github.com/jedie/pyhardlinkbackup/actions

travis-ci.org/jedie/pyhardlinkbackup

ci.appveyor.com/project/jedie/pyhardlinkbackup

coveralls.io/r/jedie/pyhardlinkbackup

requires.io/github/jedie/pyhardlinkbackup/requirements/

Example
$ phlb backup ~/my/important/documents
...start backup, some time later...
$ phlb backup ~/my/important/documents
...
This will create deduplication backups like this:
~/pyhardlinkbackups
└── documents
├── 2016-01-07-085247
│ ├── phlb_config.ini
│ ├── spreadsheet.ods
│ ├── brief.odt
│ └── important_files.ext
└── 2016-01-07-102310
├── phlb_config.ini
├── spreadsheet.ods
├── brief.odt
└── important_files.ext

Installation

Windows

install Python 3: https://www.python.org/downloads/
Download the file boot_pyhardlinkbackup.cmd
call boot_pyhardlinkbackup.cmd as admin (Right-click and use Run as administrator)

If everything works fine, you will get a venv here: %ProgramFiles%\PyHardLinkBackup
After the venv is created, call these scripts to finalize the setup:

%ProgramFiles%\PyHardLinkBackup\phlb_edit_config.cmd - create a config .ini file
%ProgramFiles%\PyHardLinkBackup\phlb_migrate_database.cmd - create database tables

To upgrade pyhardlinkbackup, call:

%ProgramFiles%\PyHardLinkBackup\phlb_upgrade_pyhardlinkbackup.cmd

To start the Django webserver, call:

%ProgramFiles%\PyHardLinkBackup\phlb_run_django_webserver.cmd

Linux

Download the file boot_pyhardlinkbackup.sh
call boot_pyhardlinkbackup.sh

If everything works fine, you will get a venv here: ~\pyhardlinkbackup
After the venv is created, call these scripts to finalize the setup:

~/PyHardLinkBackup/phlb_edit_config.sh - create a config .ini file
~/PyHardLinkBackup/phlb_migrate_database.sh - create database tables

To upgrade pyhardlinkbackup, call:

~/PyHardLinkBackup/phlb_upgrade_pyhardlinkbackup.sh

To start the Django webserver, call:

~/PyHardLinkBackup/phlb_run_django_webserver.sh

Starting a backup run
To start a backup run, use this helper script:

Windows batch: %ProgramFiles%\PyHardLinkBackup\pyhardlinkbackup_this_directory.cmd
Linux shell script: ~/PyHardLinkBackup/pyhardlinkbackup_this_directory.sh

Copy this file to a location that should be backed up and just call it to run a backup.

Verifying an existing backup
$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate

(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb verify --fast ~/PyHardLinkBackups/documents/2016-01-07-102310
With –fast the files’ contents will not be checked.
If not given: The hashes from the files’ contents will be calculated and compared. Thus, every file must be completely read from filesystem, so it will take some time.
A verify run does:

Do all files in the backup exist?
Compare file sizes
Compare hashes from hash-file
Compare files’ modification timestamps
Calculate hashes from files’ contents and compare them (will be skipped if –fast used)

Configuration
phlb will use a configuration file named: PyHardLinkBackup.ini
Search order is:

current directory down to root
user directory

E.g. if the current working directoy is /foo/bar/my_files/ then the search path will be:

/foo/bar/my_files/PyHardLinkBackup.ini
/foo/bar/PyHardLinkBackup.ini
/foo/PyHardLinkBackup.ini
/PyHardLinkBackup.ini
~/PyHardLinkBackup.ini The user home directory under Windows/Linux

Create / edit default .ini
You can just open the editor with the user directory .ini file with:
(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb config
The defaults are stored here: /phlb/config_defaults.ini

Excluding files/folders from backup:
There are two ways to exclude files/folders from your backup.
Use the follow settings in your PyHardLinkBackup.ini
# Directory names that will be recursively excluded from backups (comma separated list!)
SKIP_DIRS= __pycache__, temp

# glob-style patterns to exclude files/folders from backups (used with Path.match(), Comma separated list!)
SKIP_PATTERNS= *.pyc, *.tmp, *.cache
The filesystem scan is divided into two steps:
1. Just scan the filesystem tree
2. Filter and load meta data for every directory item
The SKIP_DIRS is used in the first step.
The SKIP_PATTERNS is used the the second step.

Upgrading pyhardlinkbackup
To upgrade to a new version just start this helper script:

Windows: phlb_upgrade_pyhardlinkbackup.cmd
Linux: phlb_upgrade_pyhardlinkbackup.sh

Some notes

What is ‘phlb’ and ‘manage’ ?!?
phlb is a CLI.
manage is similar to a normal Django manage.py, but it always
uses the pyhardlinkbackup settings.

Why in hell do you use Django?!?

Well, just because of the great database ORM and the Admin Site. ;)

How to go into the Django admin?
Just start:

Windows: phlb_run_django_webserver.cmd
Linux: phlb_run_django_webserver.sh

And then request ‘localhost’
(Note: –noreload is needed for Windows with venv!)

Running the unit tests
Just start: phlb_run_tests.cmd / phlb_run_tests.sh or do this:
$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate
(PyHardLinkBackup) ~/PyHardLinkBackup $ manage test

Using the CLI
$ cd pyhardlinkbackup/
~/PyHardLinkBackup $ source bin/activate
(PyHardLinkBackup) ~/PyHardLinkBackup $ phlb --help
Usage: phlb [OPTIONS] COMMAND [ARGS]...

pyhardlinkbackup

Options:
--version Show the version and exit.
--help Show this message and exit.

Commands:
add Scan all existing backup and add missing ones...
backup Start a Backup run
config Create/edit .ini config file
helper link helper files to given path
verify Verify a existing backup

Add missing backups to the database
phlb add can be used in different scenarios:

recreate the database
add a backup manually

phlb add does this:

scan the complete file tree under BACKUP_PATH (default: ~/PyHardLinkBackups)
recreate all hash files
add all files to database
deduplicate with hardlinks, if possible

So it’s possible to recreate the complete database:

delete the current .sqlite file
run phlb add to recreate

Another scenario is e.g.:

DSLR images are stored on a network drive.
You have already a copy of all files locally.
You would like to add the local copy to pyhardlinkbackup.

Do the following steps:

move the local files to a subdirectory below BACKUP_PATH
e.g.: ~/PyHardLinkBackups/pictures/2015-12-29-000015/
Note: the date format in the subdirectory name must match the SUB_DIR_FORMATTER in your config
run: phlb add

Now you can run phlb backup from your network drive to make a new, up-to-date backup.

Windows Development
Some notes about setting up a development environment on Windows: /dev/WindowsDevelopment.creole

Alternative solutions

Attic: https://attic-backup.org/ (Not working on Windows, own backup archive format)
BorgBackup: https://borgbackup.readthedocs.io/ (Fork of Attic with lots of improvements)
msbackup: https://pypi.python.org/pypi/msbackup/ (Uses tar for backup archives)
Duplicity: http://duplicity.nongnu.org/ (No Windows support, tar archive format)
Burp: http://burp.grke.org/ (Client/Server solution)
dirvish: http://www.dirvish.org/ (Client/Server solution)
restic: https://github.com/restic/restic/ (Uses own backup archive format)

See also: https://github.com/restic/others#list-of-backup-software

History

dev - compare v0.13.0…master

TBC

18.03.2020 - v0.13.0 - compare v0.12.3…v0.13.0

Dynamic chunk size
replace CHUNK_SIZE in PyHardLinkBackup.ini with MIN_CHUNK_SIZE
Fix misleading error msg for dst OSError, bad exception handling #23
Fix “run django server doesn’t work” #39
Fix “add” command
Deactivate PyPy tests on Travis CI

17.03.2020 - v0.12.3 - compare v0.12.2…v0.12.3

Fix #44 - wroing file size in process bar
use pytest-randomly
update requirements

06.03.2020 - v0.12.2 - compare v0.12.1…v0.12.2

Enhance log file content
Update requirements
Fix too verbose output by decrease debug level

05.03.2020 - v0.12.1 - compare v0.12.0…v0.12.1

revert lowercase PyHardLinkBackup for environment destination and default backup directory.

05.03.2020 - v0.12.0 - compare v0.11.0…v0.12.0

Refactor backup process: Use https://github.com/jedie/IterFilesystem for less RAM usage and faster start on big source trees
modernized project/sources:

Update to Django v2.2.x TLS
use poetry
add Makefile
run tests with pytest and tox
run tests only with python 3.8, 3.7, 3.6
run tests on github, too
remove support for python 3.5 (os.scandir fallback removed)

NOTE: Windows support is not tested, yet! (Help wanted)

03.03.2019 - v0.11.0 - compare v0.10.1…v0.11.0

Update boot files
Use django v1.11.x

09.09.2016 - v0.10.1 - compare v0.10.0…v0.10.1

Bugfix Catch scan dir errors #24

26.04.2016 - v0.10.0 - compare v0.9.1…v0.10.0

move under Windows the install location from %APPDATA%\PyHardLinkBackup to %ProgramFiles%\PyHardLinkBackup
to ‘migrate’: Just delete %APPDATA%\PyHardLinkBackup and install via boot_pyhardlinkbackup.cmd

26.04.2016 - v0.9.1 - compare v0.9.0…v0.9.1

run migrate database in boot process
Add missing migrate scripts

10.02.2016 - v0.9.0 - compare v0.8.0…v0.9.0

Work-a-round for Windows MAX_PATH limit: Use \?\ path prefix internally.
move Path2() to external lib: https://github.com/jedie/pathlib_revised

04.02.2016 - v0.8.0 - compare v0.7.0…v0.8.0

New: add all missing backups to database: phlb add (s.above)

03.02.2016 - v0.7.0 - compare v0.6.4…v0.7.0

New: verify a existing backup
IMPORTANT: run database migration is needed!

01.02.2016 - v0.6.4 - compare v0.6.2…v0.6.4

Windows: Bugfix temp rename error, because of the Windows API limitation, see: #13
Linux: Bugfix scanner if symlink is broken
Display local variables on low level errors

29.01.2016 - v0.6.3 - compare v0.6.2…v0.6.3

Less verbose and better information about SKIP_DIRS/SKIP_PATTERNS hits

28.01.2016 - v0.6.2 - compare v0.6.1…v0.6.2

Handle unexpected errors and continue backup with the next file
Better handle interrupt key during execution

28.01.2016 - v0.6.1 - compare v0.6.0…v0.6.1

Bugfix #13 by using a better temp rename routine

28.01.2016 - v0.6.0 - compare v0.5.1…v0.6.0

New: faster backup by compare mtime/size only if old backup files exists

27.01.2016 - v0.5.1 - compare v0.5.0…v0.5.1

IMPORTANT: run database migration is needed!
New .ini setting: LANGUAGE_CODE for change translation
mark if backup was finished compled
Display information of last backup run
Add more information into summary file

27.01.2016 - v0.5.0 - compare v0.4.2…v0.5.0

refactory source tree scan. Split in two passed.
CHANGE SKIP_FILES in .ini config to: SKIP_PATTERNS
Backup from newest files to oldest files.
Fix #10:

New –name cli option (optional) to force a backup name.
Display error message if backup name can be found (e.g.: backup a root folder)

22.01.2016 - v0.4.2 - compare v0.4.1…v0.4.2

work-a-round for junction under windows, see also: https://www.python-forum.de/viewtopic.php?f=1&t=37725&p=290429#p290428 (de)
Bugfix in windows batches: go into work dir.
print some more status information in between.

22.01.2016 - v0.4.1 - compare v0.4.0…v0.4.1

Skip files that can’t be read/write. (and try to backup the remaining files)

21.01.2016 - v0.4.0 - compare v0.3.1…v0.4.0

Search for PyHardLinkBackup.ini file in every parent directory from the current working dir
increase default chunk size to 20MB
save summary and log file for every backup run

15.01.2016 - v0.3.1 - compare v0.3.0…v0.3.1

fix unittest run under windows

15.01.2016 - v0.3.0 - compare v0.2.0…v0.3.0

database migration needed
Add ‘no_link_source’ to database (e.g. Skip source, if 1024 links created under windows)

14.01.2016 - v0.2.0 - compare v0.1.8…v0.2.0

good unittests coverage that covers the backup process

08.01.2016 - v0.1.8 - compare v0.1.0alpha0…v0.1.8

install and runable under Windows

06.01.2016 - v0.1.0alpha0 - d42a5c5

first Release on PyPi

29.12.2015 - commit 2ce43

commit ‘Proof of concept’

Links

https://pypi.python.org/pypi/pyhardlinkbackup/
https://www.python-forum.de/viewtopic.php?f=6&t=37723 (de)
https://github.com/jedie/pathlib_revised

Donating

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Note: this file is generated from README.creole 2020-03-18 10:02:44 with "python-creole"