Skip to main content

Consistent partial database dump utility

Project description

XDump

Build Status Coverage Status Documentation Status Latest PyPI version

XDump is a utility to make a consistent partial dump and load it into the database.

The idea is to provide an ability to specify what to include in the dump via SQL queries.

Installation

XDump can be obtained with pip:

$ pip install xdump

Usage example

Make a dump (on production replica for example):

>>> from xdump.postgresql import PostgreSQLBackend
>>>
>>> backend = PostgreSQLBackend(dbname='app_db', user='prod', password='pass', host='127.0.0.1', port='5432')
>>> backend.dump(
    '/path/to/dump.zip',
    full_tables=['groups'],
    partial_tables={'employees': 'SELECT * FROM employees ORDER BY id DESC LIMIT 2'}
)

Load a dump on your local machine:

>>> backend = PostgreSQLBackend(dbname='app_db', user='local', password='pass', host='127.0.0.1', port='5432')
# If you need a clear DB
>>> backend.recreate_database()  # or `backend.truncate()`
>>> backend.load('/path/to/dump.zip')

Dump is compressed by default. Compression level could be changed with passing compression argument to dump method. Valid options are zipfile.ZIP_STORED, zipfile.ZIP_DEFLATED, zipfile.ZIP_BZIP2 and zipfile.ZIP_LZMA.

The verbosity of the output could be customized via verbosity (with values 0, 1 or 2) argument of a backend class.

There are two options to control the content of the dump:

  • dump_schema - controls if the schema should be included
  • dump_data - controls if the data should be included

Command Line Interface

xload provides an ability to create a dump.

Signature:

xdump [postgres|sqlite] [OPTIONS]

Common options:

-o, --output TEXT               output file name  [required]
-f, --full TEXT                 table name to be fully dumped. Could be used
                                multiple times
-p, --partial TEXT              partial tables specification in a form
                                "table_name:select SQL". Could be used
                                multiple times
-c, --compression [deflated|stored|bzip2|lzma]
                                dump compression level
--schema / --no-schema          include / exclude the schema from the dump
--data / --no-data              include / exclude the data from the dump
-D, --dbname TEXT               database to work with  [required]
-v, --verbosity                 verbosity level

PostgreSQL-specific options:

-U, --user TEXT                 connect as specified database user
                                [required]
-W, --password TEXT             password for the DB connection
-H, --host TEXT                 database server host or socket directory
-P, --port TEXT                 database server port number

xload loads a dump into a database.

Signature:

xload [postgres|sqlite] [OPTIONS]

Common options:

-i, --input TEXT                input file name  [required]
-m, --cleanup-method [recreate|truncate]
                                method of DB cleaning up
-D, --dbname TEXT               database to work with  [required]
-v, --verbosity                 verbosity level

PostgreSQL-specific options are the same as for xdump.

RDBMS support

At the moment only the following are supported:

  • PostgreSQL
  • SQLite >= 3.8.3

Django support

Add xdump.extra.django to your INSTALLED_APPS settings:

INSTALLED_APPS = [
   ...,
   'xdump.extra.django',
]

Add XDUMP to your project settings file. It should contain minimum two entries:

  • FULL_TABLES - a list of tables that should be fully dumped.
  • PARTIAL_TABLES - a dictionary with table_name: select SQL
XDUMP = {
    'FULL_TABLES': ['groups'],
    'PARTIAL_TABLES': {'employees': 'SELECT * FROM employees WHERE id > 100'}
}

Optionally you could use a custom backend:

XDUMP = {
    ...,
    'BACKEND': 'importable.string',
}

Run xdump command:

$ ./manage.py xdump dump.zip

Run xload command:

$ ./manage.py xload dump.zip

Possible options to both commands:

  • -a/--alias - allows you to choose database config from DATABASES, that is used during the execution;
  • -b/--backend - importable string, that leads to custom dump backend class.

Options for xdump command:

  • -s/--dump-schema - controls if the schema should be included;
  • -d/--dump-data - controls if the data should be included.

Options for xload command:

  • -m/--cleanup-method - optionally re-creates DB or truncates the data.

NOTE. If the dump has no schema inside, DB won’t be re-created.

The following make command could be useful to get a configured dump from production to your local machine:

sync-production:
    ssh -t $(TARGET) "DJANGO_SETTINGS_MODULE=settings.production /path/to/manage.py xdump /tmp/dump.zip"
    scp $(TARGET):/tmp/dump.zip ./dump.zip
    ssh -t $(TARGET) "rm /tmp/dump.zip"
    DJANGO_SETTINGS_MODULE=settings.local $(PYTHON) manage.py xload ./dump.zip

And the usage is:

$ make sync-production TARGET=john@production.com PYTHON=/path/to/python/in/venv

Python support

XDump supports Python 2.7, 3.4 - 3.7 and PyPy 2 & 3.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
xdump-0.6.0-py2.py3-none-any.whl (19.2 kB) Copy SHA256 hash SHA256 Wheel py2.py3 Aug 11, 2018
xdump-0.6.0.tar.gz (17.1 kB) Copy SHA256 hash SHA256 Source None Aug 11, 2018

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page