Database settings¶
The following databases are supported by this application:
- SQLite
- MySQL
- PostgreSQL
- MongoDB
- And the ones you will implement
By default, DBBackup will try to use your database settings in DATABASES
for handle database, but some databases require custom options so you could
want to use different parameters for backup. That’s why we included a
DBBACKUP_CONNECTORS
setting; it acts like the DATABASES
one:
DBBACKUP_CONNECTORS = {
'default': {
'USER': 'backupuser',
'PASSWORD': 'backuppassword',
'HOST': 'replica-for-backup'
}
}
This configuration will allow you to use a replica with a different host and user, which is a great pratice if you don’t want to overload your main database.
DBBackup uses Connectors
for creating and restoring backups; below you’ll see
specific parameters for the built-in ones.
Common¶
All connectors have the following parameters:
CONNECTOR¶
Absolute path to a connector class by default is:
dbbackup.db.sqlite.SqliteConnector
for'django.db.backends.sqlite3'
dbbackup.db.mysql.MysqlDumpConnector
fordjango.db.backends.mysql
dbbackup.db.postgresql.PgDumpConnector
fordjango.db.backends.postgresql
dbbackup.db.postgresql.PgDumpGisConnector
fordjango.contrib.gis.db.backends.postgis
dbbackup.db.mongodb.MongoDumpConnector
fordjango_mongodb_engine
All supported built-in connectors are listed below.
EXCLUDE¶
Tables to exclude from backup as list. This option can be unavailable for connectors making snapshots.
EXTENSION¶
Extension of backup file name, default 'dump'
.
Command connectors¶
Some connectors use command line tools as dump engine, mysqldump
for
example. These kinds of tools have common attributes:
DUMP_CMD¶
Path to the command used to create a backup; default is the appropriate
command supposed to be in your PATH, for example: 'mysqldump'
for MySQL.
This setting is useful only for connectors using command line tools (children
of dbbackup.db.base.BaseCommandDBConnector
)
RESTORE_CMD¶
Same as DUMP_CMD
but for restoring action.
DUMP_PREFIX and RESTORE_PREFIX¶
String to include as prefix of dump or restore command. It will be add with a space between launched command and its prefix.
DUMP_SUFFIX and RESTORE_PREFIX¶
String to include as suffix of dump or restore command. It will be add with a space between launched command and its suffix.
ENV, DUMP_ENV and RESTORE_ENV¶
Environment variables used during command running, default are {}
. ENV
is used for every command, DUMP_ENV
and RESTORE_ENV
override the
values defined in ENV
during the dedicated commands.
USE_PARENT_ENV¶
Specify if the connector will use its parent’s environment variables. By
default it is True
to keep PATH
.
SQLite¶
SQLite uses by default dbbackup.db.sqlite.SqliteConnector
.
SqliteConnector¶
It is in pure Python and copys the behavior of .dump
command for creating a
SQL dump.
SqliteCPConnector¶
You can also use dbbackup.db.sqlite.SqliteCPConnector
for making a
simple raw copy of your database file, like a snapshot.
In-memory database aren’t dumpable with it.
MySQL¶
MySQL uses by default dbbackup.db.mysql.MysqlDumpConnector
. It uses
mysqldump
and mysql
for its job.
PostgreSQL¶
Postgres uses by default dbbackup.db.postgres.PgDumpConnector
, but
we advise you to use dbbackup.db.postgres.PgDumpBinaryConnector
. The
first one uses pg_dump
and pqsl
for its job, creating RAW SQL files.
The second uses pg_restore
with binary dump files.
They can also use psql
for launch administration command.
SINGLE_TRANSACTION¶
When doing a restore, wrap everything in a single transaction, so errors cause a rollback.
This corresponds to --single-transaction
argument of psql
and
pg_restore
.
Default: True
DROP¶
With PgDumpConnector
, it includes tables dropping statements in dump file.
PgDumpBinaryConnector
drops at restoring.
This corresponds to --clean
argument of pg_dump
and pg_restore
.
Default: True
PostGIS¶
Set in dbbackup.db.postgres.PgDumpGisConnector
, it does the same as
PostgreSQL but launchs CREATE EXTENSION IF NOT EXISTS postgis;
before
restore database.
PSQL_CMD¶
Path to psql
command used for administration tasks like enable PostGIS
for example, default is psql
.
PASSWORD¶
If you fill this settings PGPASSWORD
environment variable will be used
with every commands. For security reason, we advise to use .pgpass
file.
ADMIN_USER¶
Username used for launch action with privileges, extension creation for example.
ADMIN_PASSWORD¶
Password used for launch action with privileges, extension creation for example.
MongoDB¶
MongoDB uses by default dbbackup.db.mongodb.MongoDumpConnector
. it
uses mongodump
and mongorestore
for its job.
OBJECT_CHECK¶
Validate documents before inserting in database (option --objcheck
in command line), default is True
.
DROP¶
Replace objects that are already in database, (option --drop
in command line), default is True
.
Custom connector¶
Creating your connector is easy; create a children class from
dbbackup.db.base.BaseDBConnector
and create _create_dump
and
_restore_dump
. If your connector uses a command line tool, inherit it from
dbbackup.db.base.BaseCommandDBConnector
Connecting a Custom connector¶
Here is an example, on how to easily connect a custom connector that you have created or even that you simply want to reuse:
DBBACKUP_CONNECTOR_MAPPING = {
'transaction_hooks.backends.postgis': 'dbbackup.db.postgresql.PgDumpGisConnector',
}
Obviously instead of dbbackup.db.postgresql.PgDumpGisConnector
you can
use the custom connector you have created yourself and transaction_hooks.backends.postgis
is simply the database engine name you are using.