Database Setup#

Attention

You must have a properly configured Postgres installation for this to work. If you have a fresh install of Postgres on Ubuntu then you may want to configure the postgres user password to complete the postgres setup

Install PostgreSQL#

Please refer to the PostgreSQL documentation on how to install and configure it.

Create Database#

If you have existing Postgres authentication:

createdb datacube

or specify connection details manually:

createdb -h <hostname> -U <username> datacube

Note

You can also delete the database by running dropdb datacube. This step is not reversible.

Create Configuration File#

Datacube looks for a configuration file in ~/.datacube.conf or in the location specified by the DATACUBE_CONFIG_PATH environment variable. The file has this format:

[datacube]
# One config file may contain multiple named sections providing multiple configuration environments.
# The section named "datacube" (or "default") is used if no environment is specified.

# index_driver is optional and defaults to "default" (the default Postgres index driver)
index_driver: default

# The remaining configuration entries are for the default Postgres index driver and
# may not apply to other index drivers.
db_database: datacube

# A blank host will use a local socket. Specify a hostname (such as localhost) to use TCP.
db_hostname:

# Port is optional. The default port is 5432.
# db_port:

# Credentials are optional: you might have other Postgres authentication configured.
# The default username otherwise is the current user id.
# db_username:
# db_password:

[test]
# A "test" environment that accesses a separate test database.
index_driver: default
db_database: datacube_test

[null]
# A "null" environment for working with no index.
index_driver: null

[local_memory]
# A local non-persistent in-memory index.
#   Compatible with the default index driver, but resides purely in memory with no persistent database.
#   Note that each new invocation will receive a new, empty index.
index_driver: memory

Uncomment and fill in lines as required.

Alternately, you can configure the ODC connection to Postgres using environment variables:

DB_HOSTNAME
DB_USERNAME
DB_PASSWORD
DB_DATABASE

The desired environment can be specified:

  1. in code, with the env argument to the datacube.Datacube constructor;

  2. with the -E option to the command line ui;

  3. with the $DATACUBE_ENVIRONMENT environment variable.

Initialise the Database Schema#

The datacube system init tool can create and populate the Data Cube database schema

datacube -v system init